/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 SequenceOfStatements --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_2x3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 18:26:32,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 18:26:32,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 18:26:32,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 18:26:32,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 18:26:32,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 18:26:32,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 18:26:32,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 18:26:32,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 18:26:32,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 18:26:32,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 18:26:32,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 18:26:32,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 18:26:32,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 18:26:32,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 18:26:32,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 18:26:32,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 18:26:32,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 18:26:32,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 18:26:32,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 18:26:32,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 18:26:32,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 18:26:32,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 18:26:32,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 18:26:32,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 18:26:32,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 18:26:32,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 18:26:32,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 18:26:32,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 18:26:32,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 18:26:32,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 18:26:32,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 18:26:32,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 18:26:32,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 18:26:32,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 18:26:32,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 18:26:32,806 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 18:26:32,806 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 18:26:32,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 18:26:32,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 18:26:32,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 18:26:32,810 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 [2020-10-12 18:26:32,832 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 18:26:32,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 18:26:32,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 18:26:32,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 18:26:32,834 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 18:26:32,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 18:26:32,834 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 18:26:32,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 18:26:32,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 18:26:32,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 18:26:32,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 18:26:32,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 18:26:32,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 18:26:32,836 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 18:26:32,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 18:26:32,836 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 18:26:32,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 18:26:32,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 18:26:32,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 18:26:32,837 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 18:26:32,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 18:26:32,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 18:26:32,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 18:26:32,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 18:26:32,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 18:26:32,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 18:26:32,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 18:26:32,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 18:26:32,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 18:26:32,839 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 -> SequenceOfStatements 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 18:26:33,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 18:26:33,144 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 18:26:33,150 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 18:26:33,152 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 18:26:33,153 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 18:26:33,154 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-10-12 18:26:33,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaa9bebc4/de1439750e734514a7baa374c23069a1/FLAG3d3239009 [2020-10-12 18:26:33,659 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 18:26:33,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-10-12 18:26:33,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaa9bebc4/de1439750e734514a7baa374c23069a1/FLAG3d3239009 [2020-10-12 18:26:34,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaa9bebc4/de1439750e734514a7baa374c23069a1 [2020-10-12 18:26:34,034 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 18:26:34,036 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 18:26:34,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 18:26:34,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 18:26:34,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 18:26:34,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:26:34" (1/1) ... [2020-10-12 18:26:34,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191a9bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:26:34, skipping insertion in model container [2020-10-12 18:26:34,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:26:34" (1/1) ... [2020-10-12 18:26:34,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 18:26:34,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 18:26:34,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 18:26:34,279 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 18:26:34,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 18:26:34,304 INFO L208 MainTranslator]: Completed translation [2020-10-12 18:26:34,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:26:34 WrapperNode [2020-10-12 18:26:34,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 18:26:34,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 18:26:34,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 18:26:34,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 18:26:34,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:26:34" (1/1) ... [2020-10-12 18:26:34,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:26:34" (1/1) ... [2020-10-12 18:26:34,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:26:34" (1/1) ... [2020-10-12 18:26:34,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:26:34" (1/1) ... [2020-10-12 18:26:34,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:26:34" (1/1) ... [2020-10-12 18:26:34,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:26:34" (1/1) ... [2020-10-12 18:26:34,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:26:34" (1/1) ... [2020-10-12 18:26:34,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 18:26:34,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 18:26:34,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 18:26:34,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 18:26:34,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:26:34" (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 [2020-10-12 18:26:34,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 18:26:34,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 18:26:34,466 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-10-12 18:26:34,467 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 18:26:34,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 18:26:34,467 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-10-12 18:26:34,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 18:26:34,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 18:26:34,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 18:26:34,638 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 18:26:34,638 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 18:26:34,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:26:34 BoogieIcfgContainer [2020-10-12 18:26:34,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 18:26:34,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 18:26:34,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 18:26:34,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 18:26:34,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:26:34" (1/3) ... [2020-10-12 18:26:34,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe94108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:26:34, skipping insertion in model container [2020-10-12 18:26:34,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:26:34" (2/3) ... [2020-10-12 18:26:34,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe94108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:26:34, skipping insertion in model container [2020-10-12 18:26:34,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:26:34" (3/3) ... [2020-10-12 18:26:34,651 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-1.c [2020-10-12 18:26:34,661 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 18:26:34,668 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 18:26:34,684 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 18:26:34,709 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 18:26:34,710 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 18:26:34,710 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 18:26:34,710 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 18:26:34,710 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 18:26:34,710 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 18:26:34,711 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 18:26:34,711 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 18:26:34,726 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-12 18:26:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 18:26:34,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:26:34,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:26:34,733 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:26:34,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:26:34,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-10-12 18:26:34,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:26:34,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474161806] [2020-10-12 18:26:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:26:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:26:34,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:26:34,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:26:34,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 18:26:34,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:26:34,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-12 18:26:34,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:26:34,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 18:26:34,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 18:26:34,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 18:26:34,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 18:26:35,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:26:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:26:35,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:26:35,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:26:35,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 18:26:35,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:26:35,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 18:26:35,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:26:35,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:26:35,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:26:35,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:26:35,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:26:35,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 18:26:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:26:35,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:26:35,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:26:35,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 18:26:35,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:26:35,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-12 18:26:35,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:26:35,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 18:26:35,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:26:35,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 18:26:35,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:26:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 18:26:35,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474161806] [2020-10-12 18:26:35,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 18:26:35,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 18:26:35,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697869060] [2020-10-12 18:26:35,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 18:26:35,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:26:35,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 18:26:35,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 18:26:35,233 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-10-12 18:26:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:26:35,353 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-12 18:26:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 18:26:35,356 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-12 18:26:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:26:35,367 INFO L225 Difference]: With dead ends: 30 [2020-10-12 18:26:35,367 INFO L226 Difference]: Without dead ends: 18 [2020-10-12 18:26:35,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 18:26:35,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-12 18:26:35,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-12 18:26:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-12 18:26:35,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-12 18:26:35,420 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-10-12 18:26:35,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:26:35,420 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-12 18:26:35,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 18:26:35,421 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-12 18:26:35,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 18:26:35,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:26:35,423 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:26:35,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 18:26:35,424 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:26:35,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:26:35,425 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-10-12 18:26:35,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:26:35,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108043972] [2020-10-12 18:26:35,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:26:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:26:35,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:26:35,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:26:35,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 18:26:35,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:26:35,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-12 18:26:35,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:26:35,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 18:26:35,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 18:26:35,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 18:26:35,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:26:35,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:26:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:26:35,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:26:35,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:26:35,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 18:26:35,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:26:35,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 18:26:35,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:26:35,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:26:35,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:26:35,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:26:35,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:26:35,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 18:26:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:26:35,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:26:35,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:26:35,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-12 18:26:35,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:26:35,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-12 18:26:35,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:26:35,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 18:26:35,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:26:35,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 18:26:35,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:26:35,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 18:26:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:26:35,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:26:35,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:26:35,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 18:26:35,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:26:35,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-12 18:26:35,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:26:35,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:26:35,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:26:35,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 18:26:35,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:26:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 18:26:35,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108043972] [2020-10-12 18:26:35,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:26:35,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 18:26:35,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881362384] [2020-10-12 18:26:35,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 18:26:35,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:26:35,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 18:26:35,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 18:26:35,833 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-10-12 18:26:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:26:35,899 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-10-12 18:26:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 18:26:35,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-12 18:26:35,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:26:35,901 INFO L225 Difference]: With dead ends: 25 [2020-10-12 18:26:35,901 INFO L226 Difference]: Without dead ends: 21 [2020-10-12 18:26:35,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-12 18:26:35,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-12 18:26:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-12 18:26:35,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 18:26:35,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-12 18:26:35,910 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-10-12 18:26:35,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:26:35,911 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-12 18:26:35,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 18:26:35,911 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-12 18:26:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 18:26:35,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:26:35,913 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:26:35,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 18:26:35,913 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:26:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:26:35,914 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-10-12 18:26:35,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:26:35,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553767202] [2020-10-12 18:26:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:26:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 18:26:35,929 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 18:26:35,929 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 18:26:35,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 18:26:35,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 06:26:35 BoogieIcfgContainer [2020-10-12 18:26:35,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 18:26:35,956 INFO L168 Benchmark]: Toolchain (without parser) took 1919.26 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 103.9 MB in the beginning and 97.8 MB in the end (delta: 6.1 MB). Peak memory consumption was 68.5 MB. Max. memory is 7.1 GB. [2020-10-12 18:26:35,957 INFO L168 Benchmark]: CDTParser took 0.18 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. [2020-10-12 18:26:35,958 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.19 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 94.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-10-12 18:26:35,959 INFO L168 Benchmark]: Boogie Preprocessor took 102.33 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 94.4 MB in the beginning and 182.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-10-12 18:26:35,960 INFO L168 Benchmark]: RCFGBuilder took 234.22 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 169.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-10-12 18:26:35,961 INFO L168 Benchmark]: TraceAbstraction took 1309.08 ms. Allocated memory is still 202.9 MB. Free memory was 169.2 MB in the beginning and 97.8 MB in the end (delta: 71.4 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. [2020-10-12 18:26:35,965 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 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 268.19 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 94.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 102.33 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 94.4 MB in the beginning and 182.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 234.22 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 169.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1309.08 ms. Allocated memory is still 202.9 MB. Free memory was 169.2 MB in the beginning and 97.8 MB in the end (delta: 71.4 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 2; [L13] int b = 3; [L14] CALL, EXPR sum(a, b) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND TRUE n <= 0 [L5] return m + n; [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 19 SDslu, 58 SDs, 0 SdLazy, 44 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 888 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/4 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...