/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=NARROWEST --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 02:04:31,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:04:31,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:04:31,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:04:31,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:04:31,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:04:31,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:04:31,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:04:31,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:04:31,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:04:31,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:04:31,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:04:31,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:04:31,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:04:31,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:04:31,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:04:31,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:04:31,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:04:31,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:04:31,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:04:31,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:04:31,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:04:31,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:04:31,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:04:31,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:04:31,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:04:31,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:04:31,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:04:31,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:04:31,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:04:31,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:04:31,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:04:31,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:04:31,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:04:31,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:04:31,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:04:31,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:04:31,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:04:31,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:04:31,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:04:31,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:04:31,463 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 02:04:31,521 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:04:31,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:04:31,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:04:31,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:04:31,524 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:04:31,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:04:31,525 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:04:31,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:04:31,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:04:31,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:04:31,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:04:31,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:04:31,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:04:31,527 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:04:31,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:04:31,527 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:04:31,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:04:31,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:04:31,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:04:31,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:04:31,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:04:31,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:04:31,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:04:31,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:04:31,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:04:31,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:04:31,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:04:31,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:04:31,530 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:04:31,530 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true; [2020-09-25 02:04:32,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:04:32,031 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:04:32,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:04:32,037 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:04:32,038 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:04:32,039 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-09-25 02:04:32,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94dac0499/8bef2982c0ef444a98913b8ae0113355/FLAGf8b79f0e5 [2020-09-25 02:04:32,613 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:04:32,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-09-25 02:04:32,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94dac0499/8bef2982c0ef444a98913b8ae0113355/FLAGf8b79f0e5 [2020-09-25 02:04:32,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94dac0499/8bef2982c0ef444a98913b8ae0113355 [2020-09-25 02:04:32,967 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:04:32,974 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:04:32,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:04:32,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:04:32,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:04:32,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:04:32" (1/1) ... [2020-09-25 02:04:32,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f159ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:32, skipping insertion in model container [2020-09-25 02:04:32,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:04:32" (1/1) ... [2020-09-25 02:04:32,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:04:33,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:04:33,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:04:33,292 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:04:33,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:04:33,322 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:04:33,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:33 WrapperNode [2020-09-25 02:04:33,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:04:33,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:04:33,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:04:33,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:04:33,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:33" (1/1) ... [2020-09-25 02:04:33,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:33" (1/1) ... [2020-09-25 02:04:33,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:33" (1/1) ... [2020-09-25 02:04:33,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:33" (1/1) ... [2020-09-25 02:04:33,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:33" (1/1) ... [2020-09-25 02:04:33,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:33" (1/1) ... [2020-09-25 02:04:33,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:33" (1/1) ... [2020-09-25 02:04:33,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:04:33,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:04:33,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:04:33,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:04:33,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:33" (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 02:04:33,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:04:33,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:04:33,533 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-09-25 02:04:33,533 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:04:33,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:04:33,533 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-09-25 02:04:33,533 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:04:33,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:04:33,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:04:33,848 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:04:33,848 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 02:04:33,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:04:33 BoogieIcfgContainer [2020-09-25 02:04:33,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:04:33,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:04:33,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:04:33,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:04:33,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:04:32" (1/3) ... [2020-09-25 02:04:33,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa265ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:04:33, skipping insertion in model container [2020-09-25 02:04:33,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:04:33" (2/3) ... [2020-09-25 02:04:33,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa265ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:04:33, skipping insertion in model container [2020-09-25 02:04:33,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:04:33" (3/3) ... [2020-09-25 02:04:33,882 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-1.c [2020-09-25 02:04:33,910 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:04:33,924 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:04:33,946 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:04:33,977 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:04:33,977 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:04:33,978 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:04:33,978 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:04:33,978 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:04:33,978 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:04:33,978 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:04:33,979 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:04:34,003 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-25 02:04:34,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 02:04:34,011 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:04:34,012 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 02:04:34,012 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:04:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:04:34,019 INFO L82 PathProgramCache]: Analyzing trace with hash 989240825, now seen corresponding path program 1 times [2020-09-25 02:04:34,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:04:34,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300337604] [2020-09-25 02:04:34,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:04:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:04:34,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:04:34,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:04:34,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:04:34,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 02:04:34,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:04:34,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-09-25 02:04:34,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:04:34,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:04:34,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 02:04:34,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 02:04:34,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 02:04:34,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:04:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:04:34,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:04:34,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:04:34,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:04:34,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:04:34,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:04:34,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:04:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:04:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:04:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:04:34,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:04:34,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 02:04:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:04:34,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:04:34,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:04:34,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 02:04:34,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:04:34,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-25 02:04:34,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:04:34,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:04:34,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 02:04:34,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 02:04:34,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:04:34,712 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 02:04:34,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300337604] [2020-09-25 02:04:34,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:04:34,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:04:34,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505484566] [2020-09-25 02:04:34,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:04:34,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:04:34,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:04:34,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:04:34,745 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-09-25 02:04:34,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:04:34,865 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-09-25 02:04:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:04:34,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-25 02:04:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:04:34,881 INFO L225 Difference]: With dead ends: 39 [2020-09-25 02:04:34,881 INFO L226 Difference]: Without dead ends: 25 [2020-09-25 02:04:34,886 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 02:04:34,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-25 02:04:34,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-25 02:04:34,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-25 02:04:34,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-09-25 02:04:34,945 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2020-09-25 02:04:34,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:04:34,946 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-09-25 02:04:34,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:04:34,947 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-09-25 02:04:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 02:04:34,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:04:34,950 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 02:04:34,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:04:34,950 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:04:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:04:34,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1852726759, now seen corresponding path program 1 times [2020-09-25 02:04:34,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:04:34,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371322615] [2020-09-25 02:04:34,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:04:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:04:34,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:04:35,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:04:35,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:04:35,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 02:04:35,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:04:35,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-09-25 02:04:35,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:04:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:04:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 02:04:35,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 02:04:35,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:04:35,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:04:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:04:35,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:04:35,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:04:35,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:04:35,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:04:35,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:04:35,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:04:35,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:04:35,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:04:35,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:04:35,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:04:35,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-25 02:04:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:04:35,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:04:35,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:04:35,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 02:04:35,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:04:35,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-25 02:04:35,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:04:35,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:04:35,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 02:04:35,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 02:04:35,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:04:35,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 02:04:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:04:35,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:04:35,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:04:35,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 02:04:35,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:04:35,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 02:04:35,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:04:35,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 02:04:35,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:04:35,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 02:04:35,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:04:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 02:04:35,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371322615] [2020-09-25 02:04:35,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:04:35,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 02:04:35,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9121420] [2020-09-25 02:04:35,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 02:04:35,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:04:35,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 02:04:35,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:04:35,691 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-09-25 02:04:35,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:04:35,766 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-09-25 02:04:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 02:04:35,767 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-09-25 02:04:35,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:04:35,768 INFO L225 Difference]: With dead ends: 36 [2020-09-25 02:04:35,769 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 02:04:35,770 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 02:04:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 02:04:35,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-25 02:04:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-25 02:04:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-25 02:04:35,778 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-09-25 02:04:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:04:35,779 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-25 02:04:35,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 02:04:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-25 02:04:35,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 02:04:35,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:04:35,781 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 02:04:35,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:04:35,782 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:04:35,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:04:35,782 INFO L82 PathProgramCache]: Analyzing trace with hash -175020829, now seen corresponding path program 2 times [2020-09-25 02:04:35,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:04:35,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407801882] [2020-09-25 02:04:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:04:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 02:04:35,797 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 02:04:35,797 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 02:04:35,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:04:35,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:04:35 BoogieIcfgContainer [2020-09-25 02:04:35,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 02:04:35,832 INFO L168 Benchmark]: Toolchain (without parser) took 2860.68 ms. Allocated memory was 144.7 MB in the beginning and 231.7 MB in the end (delta: 87.0 MB). Free memory was 100.7 MB in the beginning and 187.5 MB in the end (delta: -86.8 MB). Peak memory consumption was 214.9 kB. Max. memory is 7.1 GB. [2020-09-25 02:04:35,833 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 02:04:35,834 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.38 ms. Allocated memory is still 144.7 MB. Free memory was 100.1 MB in the beginning and 90.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-25 02:04:35,835 INFO L168 Benchmark]: Boogie Preprocessor took 28.22 ms. Allocated memory is still 144.7 MB. Free memory was 90.9 MB in the beginning and 89.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-25 02:04:35,836 INFO L168 Benchmark]: RCFGBuilder took 508.09 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 89.5 MB in the beginning and 169.0 MB in the end (delta: -79.4 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-25 02:04:35,837 INFO L168 Benchmark]: TraceAbstraction took 1966.38 ms. Allocated memory was 201.3 MB in the beginning and 231.7 MB in the end (delta: 30.4 MB). Free memory was 168.3 MB in the beginning and 187.5 MB in the end (delta: -19.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-09-25 02:04:35,841 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 348.38 ms. Allocated memory is still 144.7 MB. Free memory was 100.1 MB in the beginning and 90.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.22 ms. Allocated memory is still 144.7 MB. Free memory was 90.9 MB in the beginning and 89.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 508.09 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 89.5 MB in the beginning and 169.0 MB in the end (delta: -79.4 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1966.38 ms. Allocated memory was 201.3 MB in the beginning and 231.7 MB in the end (delta: 30.4 MB). Free memory was 168.3 MB in the beginning and 187.5 MB in the end (delta: -19.2 MB). Peak memory consumption was 11.2 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: 1.8s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 44 SDslu, 84 SDs, 0 SdLazy, 48 SolverSat, 4 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, 1/5 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...