/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 interpolation-heuristic=FIRST --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_non_eq-3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:59:41,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:59:41,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:59:42,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 15:59:42,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 15:59:42,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 15:59:42,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 15:59:42,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 15:59:42,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 15:59:42,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 15:59:42,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 15:59:42,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 15:59:42,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:59:42,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:59:42,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:59:42,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:59:42,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:59:42,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:59:42,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:59:42,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:59:42,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:59:42,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:59:42,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:59:42,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:59:42,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 15:59:42,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 15:59:42,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 15:59:42,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 15:59:42,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 15:59:42,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 15:59:42,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 15:59:42,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 15:59:42,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 15:59:42,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 15:59:42,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 15:59:42,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 15:59:42,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 15:59:42,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 15:59:42,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:59:42,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:59:42,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:59:42,043 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 15:59:42,068 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:59:42,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:59:42,070 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:59:42,070 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:59:42,071 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:59:42,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:59:42,071 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:59:42,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:59:42,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:59:42,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:59:42,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:59:42,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:59:42,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:59:42,072 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:59:42,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:59:42,073 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:59:42,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:59:42,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:59:42,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:59:42,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:59:42,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:59:42,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:59:42,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:59:42,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:59:42,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:59:42,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:59:42,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:59:42,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:59:42,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:59:42,079 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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-24 15:59:42,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:59:42,551 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:59:42,555 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:59:42,557 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:59:42,559 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:59:42,560 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_non_eq-3.c [2020-09-24 15:59:42,645 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1293bdd8a/9ef718c5eb6f4ea09c72d719c521f3f0/FLAGc60e1544d [2020-09-24 15:59:43,191 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:59:43,192 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_non_eq-3.c [2020-09-24 15:59:43,199 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1293bdd8a/9ef718c5eb6f4ea09c72d719c521f3f0/FLAGc60e1544d [2020-09-24 15:59:43,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1293bdd8a/9ef718c5eb6f4ea09c72d719c521f3f0 [2020-09-24 15:59:43,581 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:59:43,587 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:59:43,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:59:43,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:59:43,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:59:43,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:59:43" (1/1) ... [2020-09-24 15:59:43,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44fd9ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:59:43, skipping insertion in model container [2020-09-24 15:59:43,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:59:43" (1/1) ... [2020-09-24 15:59:43,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:59:43,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:59:43,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:59:43,861 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:59:43,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:59:43,900 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:59:43,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:59:43 WrapperNode [2020-09-24 15:59:43,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:59:43,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:59:43,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:59:43,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:59:43,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:59:43" (1/1) ... [2020-09-24 15:59:43,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:59:43" (1/1) ... [2020-09-24 15:59:43,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:59:43" (1/1) ... [2020-09-24 15:59:43,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:59:43" (1/1) ... [2020-09-24 15:59:43,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:59:43" (1/1) ... [2020-09-24 15:59:43,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:59:43" (1/1) ... [2020-09-24 15:59:43,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:59:43" (1/1) ... [2020-09-24 15:59:43,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:59:43,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:59:43,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:59:43,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:59:43,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:59:43" (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 15:59:44,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:59:44,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:59:44,109 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-09-24 15:59:44,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:59:44,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 15:59:44,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:59:44,110 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-09-24 15:59:44,110 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:59:44,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:59:44,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:59:44,317 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:59:44,317 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 15:59:44,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:59:44 BoogieIcfgContainer [2020-09-24 15:59:44,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:59:44,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:59:44,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:59:44,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:59:44,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:59:43" (1/3) ... [2020-09-24 15:59:44,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6f96b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:59:44, skipping insertion in model container [2020-09-24 15:59:44,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:59:43" (2/3) ... [2020-09-24 15:59:44,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6f96b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:59:44, skipping insertion in model container [2020-09-24 15:59:44,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:59:44" (3/3) ... [2020-09-24 15:59:44,336 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_non_eq-3.c [2020-09-24 15:59:44,359 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:59:44,370 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:59:44,400 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:59:44,467 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:59:44,467 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:59:44,468 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:59:44,470 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:59:44,470 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:59:44,470 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:59:44,471 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:59:44,471 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:59:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-24 15:59:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-24 15:59:44,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:59:44,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:59:44,541 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:59:44,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:59:44,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1061236160, now seen corresponding path program 1 times [2020-09-24 15:59:44,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:59:44,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072581204] [2020-09-24 15:59:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:59:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 15:59:44,747 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 15:59:44,748 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 15:59:44,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:59:44,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:59:44 BoogieIcfgContainer [2020-09-24 15:59:44,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 15:59:44,797 INFO L168 Benchmark]: Toolchain (without parser) took 1209.34 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 104.0 MB in the beginning and 159.6 MB in the end (delta: -55.5 MB). Peak memory consumption was 7.4 MB. Max. memory is 7.1 GB. [2020-09-24 15:59:44,798 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 15:59:44,801 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.75 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 94.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 15:59:44,803 INFO L168 Benchmark]: Boogie Preprocessor took 36.69 ms. Allocated memory is still 140.5 MB. Free memory was 94.1 MB in the beginning and 92.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-24 15:59:44,805 INFO L168 Benchmark]: RCFGBuilder took 382.48 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.7 MB in the beginning and 171.5 MB in the end (delta: -78.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-24 15:59:44,806 INFO L168 Benchmark]: TraceAbstraction took 466.49 ms. Allocated memory is still 203.4 MB. Free memory was 170.8 MB in the beginning and 159.6 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-09-24 15:59:44,819 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 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 312.75 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 94.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.69 ms. Allocated memory is still 140.5 MB. Free memory was 94.1 MB in the beginning and 92.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 382.48 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.7 MB in the beginning and 171.5 MB in the end (delta: -78.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 466.49 ms. Allocated memory is still 203.4 MB. Free memory was 170.8 MB in the beginning and 159.6 MB in the end (delta: 11.2 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: 17]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] unsigned int a = __VERIFIER_nondet_uint(); [L14] unsigned int b = __VERIFIER_nondet_uint(); [L15] CALL, EXPR sum(a, b) [L5] COND TRUE n == 0 [L6] return m; [L15] RET, EXPR sum(a, b) [L15] unsigned int result = sum(a, b); [L16] COND TRUE result == a + b [L17] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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...