/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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_2x3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:35:12,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:35:12,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:35:12,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:35:12,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:35:12,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:35:12,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:35:12,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:35:12,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:35:12,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:35:12,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:35:12,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:35:12,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:35:12,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:35:12,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:35:12,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:35:12,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:35:12,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:35:12,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:35:12,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:35:12,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:35:12,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:35:12,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:35:12,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:35:12,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:35:12,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:35:12,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:35:12,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:35:12,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:35:12,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:35:12,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:35:12,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:35:12,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:35:12,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:35:12,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:35:12,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:35:12,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:35:12,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:35:12,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:35:12,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:35:12,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:35:12,213 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 21:35:12,254 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:35:12,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:35:12,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:35:12,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:35:12,257 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:35:12,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:35:12,258 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:35:12,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:35:12,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:35:12,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:35:12,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:35:12,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:35:12,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:35:12,260 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:35:12,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:35:12,261 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:35:12,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:35:12,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:35:12,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:35:12,262 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:35:12,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:35:12,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:35:12,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:35:12,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:35:12,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:35:12,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:35:12,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:35:12,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:35:12,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:35:12,264 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:35:12,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:35:12,718 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:35:12,724 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:35:12,727 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:35:12,728 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:35:12,729 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-09-24 21:35:12,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06b98f959/b0a7d058a5ff40708cea24eee3812dc2/FLAG1ed084daf [2020-09-24 21:35:13,347 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:35:13,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-09-24 21:35:13,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06b98f959/b0a7d058a5ff40708cea24eee3812dc2/FLAG1ed084daf [2020-09-24 21:35:13,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06b98f959/b0a7d058a5ff40708cea24eee3812dc2 [2020-09-24 21:35:13,716 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:35:13,722 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:35:13,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:35:13,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:35:13,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:35:13,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:35:13" (1/1) ... [2020-09-24 21:35:13,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7333e655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:13, skipping insertion in model container [2020-09-24 21:35:13,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:35:13" (1/1) ... [2020-09-24 21:35:13,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:35:13,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:35:13,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:35:13,987 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:35:14,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:35:14,024 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:35:14,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:14 WrapperNode [2020-09-24 21:35:14,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:35:14,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:35:14,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:35:14,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:35:14,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:14" (1/1) ... [2020-09-24 21:35:14,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:14" (1/1) ... [2020-09-24 21:35:14,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:14" (1/1) ... [2020-09-24 21:35:14,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:14" (1/1) ... [2020-09-24 21:35:14,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:14" (1/1) ... [2020-09-24 21:35:14,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:14" (1/1) ... [2020-09-24 21:35:14,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:14" (1/1) ... [2020-09-24 21:35:14,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:35:14,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:35:14,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:35:14,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:35:14,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:14" (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 21:35:14,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:35:14,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:35:14,204 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-09-24 21:35:14,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:35:14,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:35:14,205 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-09-24 21:35:14,205 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:35:14,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:35:14,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:35:14,441 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:35:14,442 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 21:35:14,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:35:14 BoogieIcfgContainer [2020-09-24 21:35:14,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:35:14,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:35:14,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:35:14,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:35:14,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:35:13" (1/3) ... [2020-09-24 21:35:14,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@515b201c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:35:14, skipping insertion in model container [2020-09-24 21:35:14,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:14" (2/3) ... [2020-09-24 21:35:14,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@515b201c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:35:14, skipping insertion in model container [2020-09-24 21:35:14,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:35:14" (3/3) ... [2020-09-24 21:35:14,470 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-1.c [2020-09-24 21:35:14,498 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:35:14,508 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:35:14,537 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:35:14,566 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:35:14,566 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:35:14,566 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:35:14,566 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:35:14,566 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:35:14,567 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:35:14,567 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:35:14,567 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:35:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-24 21:35:14,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-24 21:35:14,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:35:14,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:35:14,594 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:35:14,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:35:14,600 INFO L82 PathProgramCache]: Analyzing trace with hash 989240825, now seen corresponding path program 1 times [2020-09-24 21:35:14,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:35:14,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275777786] [2020-09-24 21:35:14,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:35:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:14,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:14,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:15,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:15,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:35:15,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:35:15,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-09-24 21:35:15,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:35:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:35:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 21:35:15,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:35:15,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:35:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:15,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:15,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:15,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:35:15,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:15,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:35:15,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:15,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:15,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:15,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:15,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:15,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 21:35:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:15,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:15,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:15,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:35:15,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:15,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-24 21:35:15,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:15,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:35:15,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 21:35:15,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 21:35:15,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:35:15,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275777786] [2020-09-24 21:35:15,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:35:15,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:35:15,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302219756] [2020-09-24 21:35:15,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:35:15,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:35:15,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:35:15,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:35:15,225 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-09-24 21:35:15,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:35:15,329 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-09-24 21:35:15,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:35:15,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-24 21:35:15,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:35:15,347 INFO L225 Difference]: With dead ends: 39 [2020-09-24 21:35:15,347 INFO L226 Difference]: Without dead ends: 25 [2020-09-24 21:35:15,352 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 [2020-09-24 21:35:15,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-24 21:35:15,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-24 21:35:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-24 21:35:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-09-24 21:35:15,403 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2020-09-24 21:35:15,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:35:15,404 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-09-24 21:35:15,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:35:15,404 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-09-24 21:35:15,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-24 21:35:15,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:35:15,408 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:35:15,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:35:15,409 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:35:15,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:35:15,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1852726759, now seen corresponding path program 1 times [2020-09-24 21:35:15,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:35:15,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133829134] [2020-09-24 21:35:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:35:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:15,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:15,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:15,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:15,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 21:35:15,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:35:15,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-09-24 21:35:15,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:15,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:35:15,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:35:15,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:35:15,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:15,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:35:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:15,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:16,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:16,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:35:16,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:16,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:35:16,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:16,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:16,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:16,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:16,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:35:16,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 21:35:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:16,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:16,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:16,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 21:35:16,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:16,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-24 21:35:16,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:16,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:35:16,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 21:35:16,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 21:35:16,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:16,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 21:35:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:16,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:16,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:16,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:35:16,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:16,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-24 21:35:16,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:16,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:35:16,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:16,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:35:16,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:35:16,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133829134] [2020-09-24 21:35:16,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:35:16,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:35:16,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866024469] [2020-09-24 21:35:16,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:35:16,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:35:16,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:35:16,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:35:16,249 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-09-24 21:35:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:35:16,312 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-09-24 21:35:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:35:16,312 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-09-24 21:35:16,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:35:16,314 INFO L225 Difference]: With dead ends: 36 [2020-09-24 21:35:16,314 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 21:35:16,315 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 [2020-09-24 21:35:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 21:35:16,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-24 21:35:16,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-24 21:35:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-24 21:35:16,323 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-09-24 21:35:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:35:16,324 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-24 21:35:16,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:35:16,324 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-24 21:35:16,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 21:35:16,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:35:16,326 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:35:16,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:35:16,326 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:35:16,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:35:16,327 INFO L82 PathProgramCache]: Analyzing trace with hash -175020829, now seen corresponding path program 2 times [2020-09-24 21:35:16,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:35:16,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099550030] [2020-09-24 21:35:16,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:35:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 21:35:16,340 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 21:35:16,340 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:35:16,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:35:16,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:35:16 BoogieIcfgContainer [2020-09-24 21:35:16,367 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:35:16,370 INFO L168 Benchmark]: Toolchain (without parser) took 2651.55 ms. Allocated memory was 138.4 MB in the beginning and 232.8 MB in the end (delta: 94.4 MB). Free memory was 101.4 MB in the beginning and 185.8 MB in the end (delta: -84.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-24 21:35:16,372 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 21:35:16,372 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.28 ms. Allocated memory is still 138.4 MB. Free memory was 100.8 MB in the beginning and 91.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-24 21:35:16,373 INFO L168 Benchmark]: Boogie Preprocessor took 30.56 ms. Allocated memory is still 138.4 MB. Free memory was 91.6 MB in the beginning and 90.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-24 21:35:16,374 INFO L168 Benchmark]: RCFGBuilder took 390.91 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 90.2 MB in the beginning and 168.6 MB in the end (delta: -78.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-24 21:35:16,375 INFO L168 Benchmark]: TraceAbstraction took 1907.75 ms. Allocated memory was 201.3 MB in the beginning and 232.8 MB in the end (delta: 31.5 MB). Free memory was 167.9 MB in the beginning and 185.8 MB in the end (delta: -17.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-09-24 21:35:16,379 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 302.28 ms. Allocated memory is still 138.4 MB. Free memory was 100.8 MB in the beginning and 91.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.56 ms. Allocated memory is still 138.4 MB. Free memory was 91.6 MB in the beginning and 90.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 390.91 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 90.2 MB in the beginning and 168.6 MB in the end (delta: -78.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1907.75 ms. Allocated memory was 201.3 MB in the beginning and 232.8 MB in the end (delta: 31.5 MB). Free memory was 167.9 MB in the beginning and 185.8 MB in the end (delta: -17.9 MB). Peak memory consumption was 13.6 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, 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...