/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=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/afterrec-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:54:52,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:54:52,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:54:52,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:54:52,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:54:52,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:54:52,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:54:52,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:54:52,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:54:52,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:54:52,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:54:52,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:54:52,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:54:52,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:54:52,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:54:52,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:54:52,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:54:52,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:54:52,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:54:52,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:54:52,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:54:52,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:54:52,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:54:52,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:54:52,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:54:52,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:54:52,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:54:52,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:54:52,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:54:52,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:54:52,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:54:52,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:54:52,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:54:52,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:54:52,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:54:52,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:54:52,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:54:52,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:54:52,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:54:52,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:54:52,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:54:52,228 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 18:54:52,281 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:54:52,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:54:52,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:54:52,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:54:52,283 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:54:52,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:54:52,284 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:54:52,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:54:52,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:54:52,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:54:52,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:54:52,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:54:52,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:54:52,287 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:54:52,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:54:52,287 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:54:52,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:54:52,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:54:52,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:54:52,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:54:52,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:54:52,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:54:52,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:54:52,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:54:52,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:54:52,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:54:52,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:54:52,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:54:52,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:54:52,290 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=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 18:54:52,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:54:52,623 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:54:52,626 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:54:52,628 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:54:52,628 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:54:52,629 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-1.c [2020-08-21 18:54:52,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/009a7782b/4e10ab7d60904dd994d32e052835a628/FLAG00d07e84c [2020-08-21 18:54:53,195 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:54:53,196 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/afterrec-1.c [2020-08-21 18:54:53,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/009a7782b/4e10ab7d60904dd994d32e052835a628/FLAG00d07e84c [2020-08-21 18:54:53,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/009a7782b/4e10ab7d60904dd994d32e052835a628 [2020-08-21 18:54:53,564 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:54:53,566 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:54:53,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:54:53,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:54:53,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:54:53,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:54:53" (1/1) ... [2020-08-21 18:54:53,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45241865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:53, skipping insertion in model container [2020-08-21 18:54:53,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:54:53" (1/1) ... [2020-08-21 18:54:53,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:54:53,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:54:53,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:54:53,784 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:54:53,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:54:53,814 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:54:53,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:53 WrapperNode [2020-08-21 18:54:53,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:54:53,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:54:53,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:54:53,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:54:53,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:53" (1/1) ... [2020-08-21 18:54:53,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:53" (1/1) ... [2020-08-21 18:54:53,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:53" (1/1) ... [2020-08-21 18:54:53,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:53" (1/1) ... [2020-08-21 18:54:53,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:53" (1/1) ... [2020-08-21 18:54:53,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:53" (1/1) ... [2020-08-21 18:54:53,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:53" (1/1) ... [2020-08-21 18:54:53,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:54:53,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:54:53,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:54:53,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:54:53,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:53" (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 18:54:53,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:54:53,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:54:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-08-21 18:54:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:54:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:54:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-08-21 18:54:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:54:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:54:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:54:54,141 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:54:54,141 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 18:54:54,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:54:54 BoogieIcfgContainer [2020-08-21 18:54:54,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:54:54,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:54:54,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:54:54,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:54:54,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:54:53" (1/3) ... [2020-08-21 18:54:54,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4151f1a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:54:54, skipping insertion in model container [2020-08-21 18:54:54,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:54:53" (2/3) ... [2020-08-21 18:54:54,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4151f1a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:54:54, skipping insertion in model container [2020-08-21 18:54:54,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:54:54" (3/3) ... [2020-08-21 18:54:54,154 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec-1.c [2020-08-21 18:54:54,165 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:54:54,173 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:54:54,188 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:54:54,209 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:54:54,209 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:54:54,209 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:54:54,209 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:54:54,209 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:54:54,209 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:54:54,210 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:54:54,210 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:54:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-08-21 18:54:54,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 18:54:54,231 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:54:54,231 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:54:54,232 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:54:54,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:54:54,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1715138264, now seen corresponding path program 1 times [2020-08-21 18:54:54,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:54:54,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947170066] [2020-08-21 18:54:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:54:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 18:54:54,338 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 18:54:54,339 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:54:54,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:54:54,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:54:54 BoogieIcfgContainer [2020-08-21 18:54:54,358 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:54:54,361 INFO L168 Benchmark]: Toolchain (without parser) took 794.07 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 103.7 MB in the beginning and 159.1 MB in the end (delta: -55.4 MB). Peak memory consumption was 6.5 MB. Max. memory is 7.1 GB. [2020-08-21 18:54:54,363 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 18:54:54,364 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.62 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 94.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:54:54,366 INFO L168 Benchmark]: Boogie Preprocessor took 107.30 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 94.2 MB in the beginning and 181.6 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-21 18:54:54,367 INFO L168 Benchmark]: RCFGBuilder took 222.09 ms. Allocated memory is still 202.4 MB. Free memory was 181.6 MB in the beginning and 171.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:54:54,369 INFO L168 Benchmark]: TraceAbstraction took 211.52 ms. Allocated memory is still 202.4 MB. Free memory was 170.4 MB in the beginning and 159.1 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:54:54,374 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.62 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 94.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.30 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 94.2 MB in the beginning and 181.6 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 222.09 ms. Allocated memory is still 202.4 MB. Free memory was 181.6 MB in the beginning and 171.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 211.52 ms. Allocated memory is still 202.4 MB. Free memory was 170.4 MB in the beginning and 159.1 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] CALL f(4) [L4] COND FALSE !(n<3) [L5] n-- [L6] CALL f(n) [L4] COND FALSE !(n<3) [L5] n-- [L6] CALL f(n) [L4] COND TRUE n<3 [L6] RET f(n) [L7] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 3, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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...