/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=BIGGEST --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/sum_2x3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:27:04,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:27:04,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:27:04,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:27:04,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:27:04,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:27:04,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:27:04,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:27:04,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:27:04,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:27:04,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:27:04,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:27:04,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:27:04,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:27:04,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:27:04,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:27:04,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:27:04,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:27:04,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:27:04,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:27:04,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:27:04,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:27:04,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:27:04,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:27:04,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:27:04,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:27:04,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:27:04,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:27:04,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:27:04,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:27:04,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:27:04,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:27:04,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:27:04,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:27:04,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:27:04,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:27:04,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:27:04,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:27:04,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:27:04,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:27:04,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:27:04,514 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 [2020-09-24 20:27:04,541 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:27:04,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:27:04,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:27:04,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:27:04,543 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:27:04,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:27:04,543 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:27:04,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:27:04,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:27:04,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:27:04,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:27:04,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:27:04,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:27:04,545 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:27:04,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:27:04,545 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:27:04,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:27:04,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:27:04,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:27:04,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:27:04,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:27:04,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:27:04,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:27:04,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:27:04,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:27:04,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:27:04,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:27:04,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:27:04,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:27:04,548 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true; [2020-09-24 20:27:05,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:27:05,073 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:27:05,080 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:27:05,082 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:27:05,084 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:27:05,085 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-09-24 20:27:05,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66f6e0710/7c422ef354ba40ccbd2fe2e7b7aa0eab/FLAGedb03f808 [2020-09-24 20:27:05,735 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:27:05,736 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-09-24 20:27:05,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66f6e0710/7c422ef354ba40ccbd2fe2e7b7aa0eab/FLAGedb03f808 [2020-09-24 20:27:06,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66f6e0710/7c422ef354ba40ccbd2fe2e7b7aa0eab [2020-09-24 20:27:06,070 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:27:06,077 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:27:06,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:27:06,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:27:06,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:27:06,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:27:06" (1/1) ... [2020-09-24 20:27:06,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21af3704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:27:06, skipping insertion in model container [2020-09-24 20:27:06,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:27:06" (1/1) ... [2020-09-24 20:27:06,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:27:06,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:27:06,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:27:06,327 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:27:06,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:27:06,363 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:27:06,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:27:06 WrapperNode [2020-09-24 20:27:06,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:27:06,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:27:06,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:27:06,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:27:06,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:27:06" (1/1) ... [2020-09-24 20:27:06,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:27:06" (1/1) ... [2020-09-24 20:27:06,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:27:06" (1/1) ... [2020-09-24 20:27:06,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:27:06" (1/1) ... [2020-09-24 20:27:06,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:27:06" (1/1) ... [2020-09-24 20:27:06,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:27:06" (1/1) ... [2020-09-24 20:27:06,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:27:06" (1/1) ... [2020-09-24 20:27:06,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:27:06,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:27:06,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:27:06,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:27:06,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:27:06" (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 [2020-09-24 20:27:06,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:27:06,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:27:06,571 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-09-24 20:27:06,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:27:06,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:27:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-09-24 20:27:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:27:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:27:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:27:06,777 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:27:06,777 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 20:27:06,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:27:06 BoogieIcfgContainer [2020-09-24 20:27:06,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:27:06,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:27:06,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:27:06,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:27:06,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:27:06" (1/3) ... [2020-09-24 20:27:06,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32016bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:27:06, skipping insertion in model container [2020-09-24 20:27:06,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:27:06" (2/3) ... [2020-09-24 20:27:06,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32016bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:27:06, skipping insertion in model container [2020-09-24 20:27:06,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:27:06" (3/3) ... [2020-09-24 20:27:06,793 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-1.c [2020-09-24 20:27:06,808 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:27:06,818 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:27:06,849 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:27:06,885 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:27:06,885 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:27:06,885 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:27:06,886 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:27:06,886 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:27:06,886 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:27:06,887 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:27:06,887 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:27:06,915 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-24 20:27:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-24 20:27:06,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:27:06,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:27:06,926 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:27:06,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:27:06,935 INFO L82 PathProgramCache]: Analyzing trace with hash 989240825, now seen corresponding path program 1 times [2020-09-24 20:27:06,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:27:06,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372804935] [2020-09-24 20:27:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:27:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:27:07,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:27:07,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:27:07,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:27:07,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 20:27:07,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:27:07,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-09-24 20:27:07,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:27:07,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:27:07,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:27:07,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 20:27:07,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 20:27:07,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:27:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:27:07,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:27:07,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:27:07,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:27:07,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:27:07,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:27:07,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:27:07,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:27:07,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:27:07,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:27:07,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:27:07,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 20:27:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:27:07,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:27:07,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:27:07,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:27:07,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:27:07,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:27:07,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 20:27:07,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:27:07,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 20:27:07,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:27:07,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 20:27:07,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:27:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:27:07,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372804935] [2020-09-24 20:27:07,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:27:07,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 20:27:07,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712042740] [2020-09-24 20:27:07,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 20:27:07,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:27:07,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 20:27:07,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:27:07,715 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 8 states. [2020-09-24 20:27:07,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:27:07,910 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-09-24 20:27:07,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 20:27:07,913 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-09-24 20:27:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:27:07,928 INFO L225 Difference]: With dead ends: 39 [2020-09-24 20:27:07,929 INFO L226 Difference]: Without dead ends: 25 [2020-09-24 20:27:07,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-24 20:27:07,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-24 20:27:07,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-24 20:27:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-24 20:27:07,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-09-24 20:27:07,997 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2020-09-24 20:27:07,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:27:07,998 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-09-24 20:27:07,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 20:27:07,998 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-09-24 20:27:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-24 20:27:08,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:27:08,001 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:27:08,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:27:08,002 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:27:08,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:27:08,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1852726759, now seen corresponding path program 1 times [2020-09-24 20:27:08,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:27:08,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445725476] [2020-09-24 20:27:08,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:27:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:27:08,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:27:08,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:27:08,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:27:08,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 20:27:08,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:27:08,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-09-24 20:27:08,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:27:08,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 20:27:08,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:27:08,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 20:27:08,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:27:08,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:27:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:27:08,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:27:08,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:27:08,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:27:08,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:27:08,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:27:08,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:27:08,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:27:08,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:27:08,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:27:08,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:27:08,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 20:27:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:27:08,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:27:08,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:27:08,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:27:08,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 20:27:08,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:27:08,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-09-24 20:27:08,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:27:08,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 20:27:08,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:27:08,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 20:27:08,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 20:27:08,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 20:27:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:27:08,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:27:09,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:27:09,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 20:27:09,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:27:09,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-24 20:27:09,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:27:09,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 20:27:09,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:27:09,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 20:27:09,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 20:27:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-24 20:27:09,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445725476] [2020-09-24 20:27:09,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:27:09,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 20:27:09,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833678026] [2020-09-24 20:27:09,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 20:27:09,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:27:09,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 20:27:09,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-24 20:27:09,084 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 10 states. [2020-09-24 20:27:09,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:27:09,291 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-09-24 20:27:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 20:27:09,291 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-09-24 20:27:09,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:27:09,294 INFO L225 Difference]: With dead ends: 36 [2020-09-24 20:27:09,294 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 20:27:09,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:27:09,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 20:27:09,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-24 20:27:09,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-24 20:27:09,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-24 20:27:09,306 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-09-24 20:27:09,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:27:09,307 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-24 20:27:09,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 20:27:09,308 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-24 20:27:09,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 20:27:09,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:27:09,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:27:09,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:27:09,313 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:27:09,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:27:09,314 INFO L82 PathProgramCache]: Analyzing trace with hash -175020829, now seen corresponding path program 2 times [2020-09-24 20:27:09,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:27:09,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030634258] [2020-09-24 20:27:09,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:27:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:27:09,328 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:27:09,328 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:27:09,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:27:09,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:27:09 BoogieIcfgContainer [2020-09-24 20:27:09,359 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:27:09,363 INFO L168 Benchmark]: Toolchain (without parser) took 3288.74 ms. Allocated memory was 146.3 MB in the beginning and 235.4 MB in the end (delta: 89.1 MB). Free memory was 103.2 MB in the beginning and 147.5 MB in the end (delta: -44.3 MB). Peak memory consumption was 44.8 MB. Max. memory is 7.1 GB. [2020-09-24 20:27:09,364 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-24 20:27:09,365 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.81 ms. Allocated memory is still 146.3 MB. Free memory was 102.5 MB in the beginning and 92.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-24 20:27:09,366 INFO L168 Benchmark]: Boogie Preprocessor took 31.75 ms. Allocated memory is still 146.3 MB. Free memory was 92.9 MB in the beginning and 91.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-24 20:27:09,367 INFO L168 Benchmark]: RCFGBuilder took 386.41 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 91.5 MB in the beginning and 170.0 MB in the end (delta: -78.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-24 20:27:09,369 INFO L168 Benchmark]: TraceAbstraction took 2575.07 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 169.4 MB in the beginning and 147.5 MB in the end (delta: 21.9 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB. [2020-09-24 20:27:09,373 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 285.81 ms. Allocated memory is still 146.3 MB. Free memory was 102.5 MB in the beginning and 92.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.75 ms. Allocated memory is still 146.3 MB. Free memory was 92.9 MB in the beginning and 91.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 386.41 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 91.5 MB in the beginning and 170.0 MB in the end (delta: -78.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2575.07 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 169.4 MB in the beginning and 147.5 MB in the end (delta: 21.9 MB). Peak memory consumption was 54.9 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, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 45 SDslu, 142 SDs, 0 SdLazy, 117 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 1.6s InterpolantComputationTime, 81 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 3449 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 3/5 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...