/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --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 [2020-09-25 14:32:54,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:32:54,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:32:54,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:32:54,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:32:54,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:32:54,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:32:54,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:32:54,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:32:54,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:32:54,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:32:54,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:32:54,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:32:54,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:32:54,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:32:54,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:32:54,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:32:54,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:32:54,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:32:54,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:32:54,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:32:54,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:32:54,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:32:54,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:32:54,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:32:54,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:32:54,505 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:32:54,508 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:32:54,509 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:32:54,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:32:54,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:32:54,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:32:54,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:32:54,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:32:54,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:32:54,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:32:54,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:32:54,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:32:54,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:32:54,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:32:54,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:32:54,521 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 14:32:54,568 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:32:54,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:32:54,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:32:54,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:32:54,571 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:32:54,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:32:54,572 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:32:54,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:32:54,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:32:54,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:32:54,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:32:54,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:32:54,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:32:54,574 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:32:54,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:32:54,575 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:32:54,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:32:54,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:32:54,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:32:54,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:32:54,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:32:54,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:32:54,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:32:54,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:32:54,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:32:54,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:32:54,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:32:54,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:32:54,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:32:54,578 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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:32:55,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:32:55,066 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:32:55,071 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:32:55,074 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:32:55,074 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:32:55,076 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-09-25 14:32:55,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6237a481a/3d91e8d1c278464ca405321a2ff584c0/FLAG036f37837 [2020-09-25 14:32:55,669 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:32:55,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-09-25 14:32:55,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6237a481a/3d91e8d1c278464ca405321a2ff584c0/FLAG036f37837 [2020-09-25 14:32:56,039 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6237a481a/3d91e8d1c278464ca405321a2ff584c0 [2020-09-25 14:32:56,057 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:32:56,066 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:32:56,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:32:56,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:32:56,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:32:56,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:32:56" (1/1) ... [2020-09-25 14:32:56,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@528baabb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:32:56, skipping insertion in model container [2020-09-25 14:32:56,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:32:56" (1/1) ... [2020-09-25 14:32:56,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:32:56,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:32:56,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:32:56,330 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:32:56,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:32:56,368 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:32:56,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:32:56 WrapperNode [2020-09-25 14:32:56,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:32:56,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:32:56,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:32:56,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:32:56,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:32:56" (1/1) ... [2020-09-25 14:32:56,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:32:56" (1/1) ... [2020-09-25 14:32:56,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:32:56" (1/1) ... [2020-09-25 14:32:56,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:32:56" (1/1) ... [2020-09-25 14:32:56,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:32:56" (1/1) ... [2020-09-25 14:32:56,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:32:56" (1/1) ... [2020-09-25 14:32:56,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:32:56" (1/1) ... [2020-09-25 14:32:56,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:32:56,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:32:56,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:32:56,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:32:56,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:32:56" (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 14:32:56,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:32:56,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:32:56,568 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-09-25 14:32:56,568 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:32:56,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:32:56,569 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-09-25 14:32:56,569 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:32:56,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:32:56,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:32:56,780 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:32:56,781 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 14:32:56,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:32:56 BoogieIcfgContainer [2020-09-25 14:32:56,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:32:56,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:32:56,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:32:56,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:32:56,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:32:56" (1/3) ... [2020-09-25 14:32:56,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73234926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:32:56, skipping insertion in model container [2020-09-25 14:32:56,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:32:56" (2/3) ... [2020-09-25 14:32:56,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73234926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:32:56, skipping insertion in model container [2020-09-25 14:32:56,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:32:56" (3/3) ... [2020-09-25 14:32:56,820 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-1.c [2020-09-25 14:32:56,848 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:32:56,860 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:32:56,912 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:32:56,943 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:32:56,943 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:32:56,943 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:32:56,943 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:32:56,943 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:32:56,944 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:32:56,944 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:32:56,944 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:32:56,963 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-25 14:32:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 14:32:56,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:32:56,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:32:56,972 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:32:56,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:32:56,978 INFO L82 PathProgramCache]: Analyzing trace with hash 989240825, now seen corresponding path program 1 times [2020-09-25 14:32:56,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:32:56,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779835774] [2020-09-25 14:32:56,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:32:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:32:57,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:32:57,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:32:57,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:32:57,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 14:32:57,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:32:57,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-09-25 14:32:57,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:32:57,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:32:57,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:32:57,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 14:32:57,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:32:57,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 14:32:57,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:32:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:32:57,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:32:57,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:32:57,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:32:57,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:32:57,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 14:32:57,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:32:57,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:32:57,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:32:57,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:32:57,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:32:57,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:32:57,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 14:32:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:32:57,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:32:57,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:32:57,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:32:57,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:32:57,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 14:32:57,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:32:57,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:32:57,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:32:57,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:32:57,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:32:57,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:32:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:32:57,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779835774] [2020-09-25 14:32:57,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:32:57,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:32:57,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843652712] [2020-09-25 14:32:57,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:32:57,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:32:57,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:32:57,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:32:57,669 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-09-25 14:32:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:32:57,767 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-09-25 14:32:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:32:57,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-25 14:32:57,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:32:57,784 INFO L225 Difference]: With dead ends: 39 [2020-09-25 14:32:57,784 INFO L226 Difference]: Without dead ends: 25 [2020-09-25 14:32:57,789 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 [2020-09-25 14:32:57,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-25 14:32:57,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-25 14:32:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-25 14:32:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-09-25 14:32:57,853 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2020-09-25 14:32:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:32:57,854 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-09-25 14:32:57,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:32:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-09-25 14:32:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 14:32:57,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:32:57,857 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] [2020-09-25 14:32:57,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:32:57,858 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:32:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:32:57,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1852726759, now seen corresponding path program 1 times [2020-09-25 14:32:57,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:32:57,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171013714] [2020-09-25 14:32:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:32:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:32:57,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:32:57,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:32:58,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:32:58,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 14:32:58,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:32:58,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-09-25 14:32:58,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:32:58,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:32:58,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:32:58,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 14:32:58,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 14:32:58,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:32:58,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:32:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:32:58,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:32:58,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:32:58,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:32:58,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:32:58,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 14:32:58,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:32:58,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:32:58,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:32:58,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:32:58,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:32:58,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:32:58,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 14:32:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:32:58,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:32:58,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:32:58,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 14:32:58,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:32:58,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-25 14:32:58,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:32:58,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:32:58,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:32:58,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:32:58,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 14:32:58,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:32:58,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:32:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:32:58,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:32:58,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:32:58,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:32:58,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:32:58,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-25 14:32:58,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:32:58,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:32:58,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:32:58,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:32:58,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 14:32:58,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:32:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 14:32:58,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171013714] [2020-09-25 14:32:58,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:32:58,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 14:32:58,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814390259] [2020-09-25 14:32:58,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 14:32:58,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:32:58,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 14:32:58,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 14:32:58,593 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-09-25 14:32:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:32:58,670 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-09-25 14:32:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:32:58,671 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-09-25 14:32:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:32:58,672 INFO L225 Difference]: With dead ends: 36 [2020-09-25 14:32:58,673 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 14:32:58,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-25 14:32:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 14:32:58,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-25 14:32:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-25 14:32:58,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-25 14:32:58,683 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-09-25 14:32:58,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:32:58,684 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-25 14:32:58,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 14:32:58,684 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-25 14:32:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 14:32:58,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:32:58,686 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] [2020-09-25 14:32:58,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:32:58,686 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:32:58,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:32:58,687 INFO L82 PathProgramCache]: Analyzing trace with hash -175020829, now seen corresponding path program 2 times [2020-09-25 14:32:58,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:32:58,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843289662] [2020-09-25 14:32:58,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:32:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 14:32:58,702 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 14:32:58,702 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 14:32:58,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:32:58,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:32:58 BoogieIcfgContainer [2020-09-25 14:32:58,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 14:32:58,740 INFO L168 Benchmark]: Toolchain (without parser) took 2678.81 ms. Allocated memory was 140.0 MB in the beginning and 234.9 MB in the end (delta: 94.9 MB). Free memory was 103.3 MB in the beginning and 185.5 MB in the end (delta: -82.2 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-25 14:32:58,741 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 14:32:58,742 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.57 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 14:32:58,742 INFO L168 Benchmark]: Boogie Preprocessor took 37.19 ms. Allocated memory is still 140.0 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-25 14:32:58,744 INFO L168 Benchmark]: RCFGBuilder took 379.69 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 170.4 MB in the end (delta: -78.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-25 14:32:58,745 INFO L168 Benchmark]: TraceAbstraction took 1944.78 ms. Allocated memory was 202.9 MB in the beginning and 234.9 MB in the end (delta: 32.0 MB). Free memory was 170.4 MB in the beginning and 185.5 MB in the end (delta: -15.1 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-09-25 14:32:58,749 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 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 298.57 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.19 ms. Allocated memory is still 140.0 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 379.69 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 170.4 MB in the end (delta: -78.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1944.78 ms. Allocated memory was 202.9 MB in the beginning and 234.9 MB in the end (delta: 32.0 MB). Free memory was 170.4 MB in the beginning and 185.5 MB in the end (delta: -15.1 MB). Peak memory consumption was 16.9 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: 1.7s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 33 SDslu, 94 SDs, 0 SdLazy, 52 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s 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, 1.2s InterpolantComputationTime, 81 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 1983 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...