/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 --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-circular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:35:28,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:35:28,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:35:28,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:35:28,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:35:28,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:35:28,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:35:28,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:35:28,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:35:28,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:35:28,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:35:28,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:35:28,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:35:28,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:35:28,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:35:28,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:35:28,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:35:28,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:35:28,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:35:28,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:35:28,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:35:28,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:35:28,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:35:28,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:35:28,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:35:28,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:35:28,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:35:28,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:35:28,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:35:28,129 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 20:35:28,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 20:35:28,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 20:35:28,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 20:35:28,131 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 20:35:28,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 20:35:28,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 20:35:28,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 20:35:28,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 20:35:28,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:35:28,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:35:28,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:35:28,141 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 [2020-08-21 20:35:28,162 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:35:28,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:35:28,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:35:28,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:35:28,164 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:35:28,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:35:28,164 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:35:28,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:35:28,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:35:28,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:35:28,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:35:28,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:35:28,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:35:28,166 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:35:28,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:35:28,166 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:35:28,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:35:28,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:35:28,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:35:28,167 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:35:28,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:35:28,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:35:28,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:35:28,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:35:28,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:35:28,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:35:28,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:35:28,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:35:28,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:35:28,169 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:35:28,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:35:28,503 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:35:28,506 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:35:28,507 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:35:28,507 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:35:28,509 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-circular-2.i [2020-08-21 20:35:28,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acc400999/001d259519a64992ab0ee4fdea3d27e7/FLAGe1065b59f [2020-08-21 20:35:29,076 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:35:29,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-circular-2.i [2020-08-21 20:35:29,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acc400999/001d259519a64992ab0ee4fdea3d27e7/FLAGe1065b59f [2020-08-21 20:35:29,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acc400999/001d259519a64992ab0ee4fdea3d27e7 [2020-08-21 20:35:29,449 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:35:29,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:35:29,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:35:29,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:35:29,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:35:29,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:35:29" (1/1) ... [2020-08-21 20:35:29,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49d8e50c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:29, skipping insertion in model container [2020-08-21 20:35:29,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:35:29" (1/1) ... [2020-08-21 20:35:29,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:35:29,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:35:29,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:35:30,007 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:35:30,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:35:30,109 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:35:30,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:30 WrapperNode [2020-08-21 20:35:30,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:35:30,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:35:30,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:35:30,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:35:30,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:30" (1/1) ... [2020-08-21 20:35:30,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:30" (1/1) ... [2020-08-21 20:35:30,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:30" (1/1) ... [2020-08-21 20:35:30,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:30" (1/1) ... [2020-08-21 20:35:30,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:30" (1/1) ... [2020-08-21 20:35:30,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:30" (1/1) ... [2020-08-21 20:35:30,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:30" (1/1) ... [2020-08-21 20:35:30,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:35:30,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:35:30,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:35:30,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:35:30,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:30" (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 [2020-08-21 20:35:30,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:35:30,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:35:30,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:35:30,249 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 20:35:30,249 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 20:35:30,250 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 20:35:30,250 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 20:35:30,250 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 20:35:30,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 20:35:30,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 20:35:30,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 20:35:30,251 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 20:35:30,251 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 20:35:30,251 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 20:35:30,251 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 20:35:30,251 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 20:35:30,251 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 20:35:30,252 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 20:35:30,252 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 20:35:30,252 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 20:35:30,252 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 20:35:30,252 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 20:35:30,252 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 20:35:30,252 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 20:35:30,253 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 20:35:30,253 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 20:35:30,253 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 20:35:30,253 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 20:35:30,253 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 20:35:30,253 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 20:35:30,254 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 20:35:30,254 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 20:35:30,254 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 20:35:30,254 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 20:35:30,254 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 20:35:30,254 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 20:35:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 20:35:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 20:35:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 20:35:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 20:35:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 20:35:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 20:35:30,255 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 20:35:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 20:35:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 20:35:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 20:35:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 20:35:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 20:35:30,256 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 20:35:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 20:35:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 20:35:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 20:35:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 20:35:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 20:35:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 20:35:30,257 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 20:35:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 20:35:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 20:35:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 20:35:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 20:35:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 20:35:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 20:35:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 20:35:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 20:35:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 20:35:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 20:35:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 20:35:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 20:35:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 20:35:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 20:35:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 20:35:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 20:35:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 20:35:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 20:35:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 20:35:30,261 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 20:35:30,261 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 20:35:30,261 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 20:35:30,261 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 20:35:30,261 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 20:35:30,261 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 20:35:30,261 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 20:35:30,262 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 20:35:30,262 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 20:35:30,262 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 20:35:30,262 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 20:35:30,262 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 20:35:30,262 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 20:35:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 20:35:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 20:35:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 20:35:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 20:35:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 20:35:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 20:35:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 20:35:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 20:35:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 20:35:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 20:35:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 20:35:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 20:35:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 20:35:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 20:35:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 20:35:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 20:35:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 20:35:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 20:35:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:35:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:35:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:35:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 20:35:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 20:35:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 20:35:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 20:35:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 20:35:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 20:35:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:35:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:35:30,776 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:35:30,777 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-08-21 20:35:30,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:35:30 BoogieIcfgContainer [2020-08-21 20:35:30,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:35:30,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:35:30,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:35:30,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:35:30,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:35:29" (1/3) ... [2020-08-21 20:35:30,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f614a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:35:30, skipping insertion in model container [2020-08-21 20:35:30,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:30" (2/3) ... [2020-08-21 20:35:30,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f614a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:35:30, skipping insertion in model container [2020-08-21 20:35:30,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:35:30" (3/3) ... [2020-08-21 20:35:30,798 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-circular-2.i [2020-08-21 20:35:30,809 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:35:30,820 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-08-21 20:35:30,834 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-08-21 20:35:30,859 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:35:30,860 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:35:30,860 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:35:30,860 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:35:30,860 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:35:30,861 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:35:30,861 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:35:30,861 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:35:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-21 20:35:30,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 20:35:30,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:35:30,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:35:30,892 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:35:30,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:35:30,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1483997276, now seen corresponding path program 1 times [2020-08-21 20:35:30,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:35:30,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242039113] [2020-08-21 20:35:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:35:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:35:31,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:35:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:35:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:35:31,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242039113] [2020-08-21 20:35:31,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:35:31,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:35:31,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400564004] [2020-08-21 20:35:31,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:35:31,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:35:31,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:35:31,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:35:31,118 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-21 20:35:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:35:31,286 INFO L93 Difference]: Finished difference Result 70 states and 106 transitions. [2020-08-21 20:35:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:35:31,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-21 20:35:31,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:35:31,306 INFO L225 Difference]: With dead ends: 70 [2020-08-21 20:35:31,307 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 20:35:31,310 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 [2020-08-21 20:35:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 20:35:31,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 20:35:31,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 20:35:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-08-21 20:35:31,373 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 10 [2020-08-21 20:35:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:35:31,373 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-08-21 20:35:31,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:35:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-08-21 20:35:31,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 20:35:31,375 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:35:31,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:35:31,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:35:31,375 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:35:31,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:35:31,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1199756337, now seen corresponding path program 1 times [2020-08-21 20:35:31,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:35:31,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594690596] [2020-08-21 20:35:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:35:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:35:31,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:35:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:35:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:35:31,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594690596] [2020-08-21 20:35:31,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:35:31,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:35:31,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217060087] [2020-08-21 20:35:31,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:35:31,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:35:31,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:35:31,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:35:31,550 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-08-21 20:35:31,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:35:31,656 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-08-21 20:35:31,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 20:35:31,657 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-21 20:35:31,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:35:31,658 INFO L225 Difference]: With dead ends: 46 [2020-08-21 20:35:31,659 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 20:35:31,660 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 [2020-08-21 20:35:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 20:35:31,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2020-08-21 20:35:31,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 20:35:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-08-21 20:35:31,667 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 11 [2020-08-21 20:35:31,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:35:31,667 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-08-21 20:35:31,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:35:31,668 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-08-21 20:35:31,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 20:35:31,668 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:35:31,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:35:31,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:35:31,669 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:35:31,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:35:31,670 INFO L82 PathProgramCache]: Analyzing trace with hash -97127833, now seen corresponding path program 1 times [2020-08-21 20:35:31,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:35:31,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723106605] [2020-08-21 20:35:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:35:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:35:31,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:35:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:35:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:35:31,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723106605] [2020-08-21 20:35:31,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:35:31,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 20:35:31,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280768612] [2020-08-21 20:35:31,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 20:35:31,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:35:31,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 20:35:31,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 20:35:31,761 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 4 states. [2020-08-21 20:35:31,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:35:31,854 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2020-08-21 20:35:31,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 20:35:31,856 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-21 20:35:31,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:35:31,861 INFO L225 Difference]: With dead ends: 75 [2020-08-21 20:35:31,861 INFO L226 Difference]: Without dead ends: 53 [2020-08-21 20:35:31,862 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 [2020-08-21 20:35:31,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-21 20:35:31,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2020-08-21 20:35:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 20:35:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-08-21 20:35:31,882 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 14 [2020-08-21 20:35:31,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:35:31,885 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-08-21 20:35:31,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 20:35:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-08-21 20:35:31,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 20:35:31,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:35:31,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:35:31,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:35:31,887 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:35:31,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:35:31,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2075944349, now seen corresponding path program 1 times [2020-08-21 20:35:31,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:35:31,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279979997] [2020-08-21 20:35:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:35:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 20:35:31,954 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 20:35:31,954 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 20:35:31,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:35:31,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:35:31 BoogieIcfgContainer [2020-08-21 20:35:31,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 20:35:31,980 INFO L168 Benchmark]: Toolchain (without parser) took 2528.68 ms. Allocated memory was 141.0 MB in the beginning and 234.9 MB in the end (delta: 93.8 MB). Free memory was 102.2 MB in the beginning and 154.3 MB in the end (delta: -52.1 MB). Peak memory consumption was 41.8 MB. Max. memory is 7.1 GB. [2020-08-21 20:35:31,981 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 20:35:31,982 INFO L168 Benchmark]: CACSL2BoogieTranslator took 659.65 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 102.0 MB in the beginning and 169.3 MB in the end (delta: -67.3 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-08-21 20:35:31,983 INFO L168 Benchmark]: Boogie Preprocessor took 80.14 ms. Allocated memory is still 202.9 MB. Free memory was 169.3 MB in the beginning and 166.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-21 20:35:31,983 INFO L168 Benchmark]: RCFGBuilder took 594.60 ms. Allocated memory is still 202.9 MB. Free memory was 166.7 MB in the beginning and 122.5 MB in the end (delta: 44.2 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. [2020-08-21 20:35:31,984 INFO L168 Benchmark]: TraceAbstraction took 1187.77 ms. Allocated memory was 202.9 MB in the beginning and 234.9 MB in the end (delta: 32.0 MB). Free memory was 121.9 MB in the beginning and 154.3 MB in the end (delta: -32.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 20:35:31,988 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 659.65 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 102.0 MB in the beginning and 169.3 MB in the end (delta: -67.3 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 80.14 ms. Allocated memory is still 202.9 MB. Free memory was 169.3 MB in the beginning and 166.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 594.60 ms. Allocated memory is still 202.9 MB. Free memory was 166.7 MB in the beginning and 122.5 MB in the end (delta: 44.2 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1187.77 ms. Allocated memory was 202.9 MB in the beginning and 234.9 MB in the end (delta: 32.0 MB). Free memory was 121.9 MB in the beginning and 154.3 MB in the end (delta: -32.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1021]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L985] SLL* head = malloc(sizeof(SLL)); [L986] head->next = head [L987] head->data = 0 [L989] SLL* x = head; [L990] int state = 1; [L993] COND FALSE !(__VERIFIER_nondet_int()) [L1014] x->data = state [L1016] EXPR head->next [L1016] x = head->next [L1017] COND FALSE !(!(((void*)0) != x)) [L1019] EXPR x->data [L1019] COND TRUE x->data != 0 [L1021] EXPR x->next [L1021] EXPR x->next->data [L1021] EXPR x->next->data != 0 && x->data > x->next->data [L1021] EXPR x->data [L1021] EXPR x->next [L1021] EXPR x->next->data [L1021] EXPR x->next->data != 0 && x->data > x->next->data [L1021] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1021] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 92 SDtfs, 44 SDslu, 66 SDs, 0 SdLazy, 140 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=3, 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, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 1282 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...