/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=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/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:51:51,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:51:51,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:51:51,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:51:51,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:51:51,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:51:51,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:51:51,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:51:51,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:51:51,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:51:51,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:51:51,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:51:51,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:51:51,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:51:51,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:51:51,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:51:51,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:51:51,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:51:51,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:51:51,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:51:51,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:51:51,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:51:51,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:51:51,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:51:51,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:51:51,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:51:51,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:51:51,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:51:51,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:51:51,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:51:51,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:51:51,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:51:51,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:51:51,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:51:51,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:51:51,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:51:51,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:51:51,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:51:51,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:51:51,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:51:51,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:51:51,961 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 [2020-09-25 00:51:52,006 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:51:52,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:51:52,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:51:52,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:51:52,009 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:51:52,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:51:52,009 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:51:52,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:51:52,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:51:52,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:51:52,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:51:52,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:51:52,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:51:52,012 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:51:52,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:51:52,012 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:51:52,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:51:52,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:51:52,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:51:52,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:51:52,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:51:52,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:51:52,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:51:52,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:51:52,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:51:52,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:51:52,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:51:52,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:51:52,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:51:52,015 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;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 -> produce-proofs=true;produce-unsat-cores=true;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 -> produce-proofs=true;produce-unsat-cores=true;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 -> produce-proofs=true;produce-unsat-cores=true;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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-09-25 00:51:52,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:51:52,498 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:51:52,505 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:51:52,508 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:51:52,508 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:51:52,509 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-09-25 00:51:52,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff0762d35/66743be63efc4de0becb0419d257cc4e/FLAGff666c149 [2020-09-25 00:51:53,100 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:51:53,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-09-25 00:51:53,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff0762d35/66743be63efc4de0becb0419d257cc4e/FLAGff666c149 [2020-09-25 00:51:53,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff0762d35/66743be63efc4de0becb0419d257cc4e [2020-09-25 00:51:53,468 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:51:53,474 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:51:53,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:51:53,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:51:53,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:51:53,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:51:53" (1/1) ... [2020-09-25 00:51:53,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fed979e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:53, skipping insertion in model container [2020-09-25 00:51:53,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:51:53" (1/1) ... [2020-09-25 00:51:53,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:51:53,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:51:53,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:51:53,803 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:51:53,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:51:53,835 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:51:53,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:53 WrapperNode [2020-09-25 00:51:53,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:51:53,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:51:53,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:51:53,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:51:53,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:53" (1/1) ... [2020-09-25 00:51:53,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:53" (1/1) ... [2020-09-25 00:51:53,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:53" (1/1) ... [2020-09-25 00:51:53,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:53" (1/1) ... [2020-09-25 00:51:53,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:53" (1/1) ... [2020-09-25 00:51:53,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:53" (1/1) ... [2020-09-25 00:51:53,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:53" (1/1) ... [2020-09-25 00:51:53,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:51:53,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:51:53,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:51:53,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:51:53,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:53" (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 [2020-09-25 00:51:54,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:51:54,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:51:54,018 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-09-25 00:51:54,018 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:51:54,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:51:54,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 00:51:54,019 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-09-25 00:51:54,019 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:51:54,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:51:54,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:51:54,217 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:51:54,218 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 00:51:54,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:51:54 BoogieIcfgContainer [2020-09-25 00:51:54,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:51:54,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:51:54,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:51:54,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:51:54,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:51:53" (1/3) ... [2020-09-25 00:51:54,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb671b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:51:54, skipping insertion in model container [2020-09-25 00:51:54,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:51:53" (2/3) ... [2020-09-25 00:51:54,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb671b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:51:54, skipping insertion in model container [2020-09-25 00:51:54,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:51:54" (3/3) ... [2020-09-25 00:51:54,231 INFO L109 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-09-25 00:51:54,243 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:51:54,252 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:51:54,274 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:51:54,305 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:51:54,305 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:51:54,306 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:51:54,306 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:51:54,306 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:51:54,306 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:51:54,306 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:51:54,307 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:51:54,328 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-09-25 00:51:54,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 00:51:54,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:51:54,337 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:51:54,338 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:51:54,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:51:54,345 INFO L82 PathProgramCache]: Analyzing trace with hash 31169137, now seen corresponding path program 1 times [2020-09-25 00:51:54,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:51:54,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868502266] [2020-09-25 00:51:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:51:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:51:54,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:54,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:55,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:51:55,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 00:51:55,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:51:55,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 650 [2020-09-25 00:51:55,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:51:55,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:51:55,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 00:51:55,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 00:51:55,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 00:51:55,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:51:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:51:55,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:55,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:51:55,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 00:51:55,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:51:55,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 00:51:55,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:51:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:51:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:51:55,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:51:55,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 00:51:55,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 00:51:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:51:55,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:55,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:51:55,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:51:55,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:51:55,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 00:51:55,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:51:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:51:55,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:51:55,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:51:55,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:51:55,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 00:51:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:51:55,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:51:55,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:51:55,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 00:51:55,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:51:55,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 00:51:55,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:51:55,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:51:55,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:51:55,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 00:51:55,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:51:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 00:51:55,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868502266] [2020-09-25 00:51:55,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:51:55,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 00:51:55,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405774246] [2020-09-25 00:51:55,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 00:51:55,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:51:55,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 00:51:55,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 00:51:55,467 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 6 states. [2020-09-25 00:51:55,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:51:55,671 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-09-25 00:51:55,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 00:51:55,673 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-09-25 00:51:55,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:51:55,687 INFO L225 Difference]: With dead ends: 60 [2020-09-25 00:51:55,687 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 00:51:55,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-25 00:51:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 00:51:55,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-09-25 00:51:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-25 00:51:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-09-25 00:51:55,743 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2020-09-25 00:51:55,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:51:55,744 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-09-25 00:51:55,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 00:51:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-09-25 00:51:55,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-25 00:51:55,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:51:55,747 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:51:55,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:51:55,748 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:51:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:51:55,749 INFO L82 PathProgramCache]: Analyzing trace with hash 812451921, now seen corresponding path program 1 times [2020-09-25 00:51:55,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:51:55,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529265259] [2020-09-25 00:51:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:51:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 00:51:55,792 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 00:51:55,794 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 00:51:55,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:51:55,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:51:55 BoogieIcfgContainer [2020-09-25 00:51:55,838 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 00:51:55,841 INFO L168 Benchmark]: Toolchain (without parser) took 2370.65 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 104.0 MB in the beginning and 93.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 72.6 MB. Max. memory is 7.1 GB. [2020-09-25 00:51:55,842 INFO L168 Benchmark]: CDTParser took 0.22 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: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 00:51:55,843 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.53 ms. Allocated memory is still 140.5 MB. Free memory was 103.3 MB in the beginning and 94.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-09-25 00:51:55,845 INFO L168 Benchmark]: Boogie Preprocessor took 106.57 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 181.5 MB in the end (delta: -87.3 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-09-25 00:51:55,845 INFO L168 Benchmark]: RCFGBuilder took 278.04 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 169.0 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-25 00:51:55,846 INFO L168 Benchmark]: TraceAbstraction took 1615.11 ms. Allocated memory is still 202.4 MB. Free memory was 168.3 MB in the beginning and 93.2 MB in the end (delta: 75.1 MB). Peak memory consumption was 75.1 MB. Max. memory is 7.1 GB. [2020-09-25 00:51:55,851 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 361.53 ms. Allocated memory is still 140.5 MB. Free memory was 103.3 MB in the beginning and 94.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.57 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 181.5 MB in the end (delta: -87.3 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 278.04 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 169.0 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1615.11 ms. Allocated memory is still 202.4 MB. Free memory was 168.3 MB in the beginning and 93.2 MB in the end (delta: 75.1 MB). Peak memory consumption was 75.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 31]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int g; [L26] int g = __VERIFIER_nondet_int(); [L27] int h = !g; [L28] CALL A(g,h) [L17] COND TRUE \read(a1) [L18] CALL A(a2,a1) [L17] COND FALSE !(\read(a1)) [L20] g = a2 [L18] RET A(a2,a1) [L28] RET A(g,h) [L29] CALL A(g,h) [L17] COND TRUE \read(a1) [L18] CALL A(a2,a1) [L17] COND FALSE !(\read(a1)) [L20] g = a2 [L18] RET A(a2,a1) [L29] RET A(g,h) [L30] COND TRUE \read(g) [L31] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 21 SDslu, 77 SDs, 0 SdLazy, 44 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 2464 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 6/6 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...