/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:14:02,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:14:02,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:14:02,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:14:02,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:14:02,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:14:02,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:14:02,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:14:02,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:14:02,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:14:02,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:14:02,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:14:02,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:14:02,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:14:02,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:14:02,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:14:02,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:14:02,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:14:02,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:14:02,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:14:02,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:14:02,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:14:02,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:14:02,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:14:02,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:14:02,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:14:02,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:14:02,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:14:02,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:14:02,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:14:02,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:14:02,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:14:02,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:14:02,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:14:02,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:14:02,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:14:02,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:14:02,978 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:14:02,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:14:02,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:14:02,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:14:02,982 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:14:03,004 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:14:03,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:14:03,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:14:03,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:14:03,007 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:14:03,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:14:03,007 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:14:03,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:14:03,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:14:03,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:14:03,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:14:03,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:14:03,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:14:03,010 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:14:03,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:14:03,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:14:03,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:14:03,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:14:03,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:14:03,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:14:03,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:14:03,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:14:03,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:14:03,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:14:03,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:14:03,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:14:03,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:03,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:14:03,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:14:03,013 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:14:03,312 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:14:03,326 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:14:03,329 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:14:03,331 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:14:03,331 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:14:03,332 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-07-20 11:14:03,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/062baa836/160ad47d23ee4222940ca891c6a90256/FLAGaa75470c0 [2020-07-20 11:14:03,783 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:14:03,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-07-20 11:14:03,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/062baa836/160ad47d23ee4222940ca891c6a90256/FLAGaa75470c0 [2020-07-20 11:14:04,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/062baa836/160ad47d23ee4222940ca891c6a90256 [2020-07-20 11:14:04,175 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:14:04,178 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:14:04,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:14:04,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:14:04,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:14:04,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:14:04" (1/1) ... [2020-07-20 11:14:04,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1264fabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:04, skipping insertion in model container [2020-07-20 11:14:04,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:14:04" (1/1) ... [2020-07-20 11:14:04,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:14:04,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:14:04,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:14:04,383 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:14:04,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:14:04,416 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:14:04,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:04 WrapperNode [2020-07-20 11:14:04,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:14:04,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:14:04,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:14:04,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:14:04,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:04" (1/1) ... [2020-07-20 11:14:04,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:04" (1/1) ... [2020-07-20 11:14:04,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:04" (1/1) ... [2020-07-20 11:14:04,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:04" (1/1) ... [2020-07-20 11:14:04,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:04" (1/1) ... [2020-07-20 11:14:04,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:04" (1/1) ... [2020-07-20 11:14:04,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:04" (1/1) ... [2020-07-20 11:14:04,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:14:04,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:14:04,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:14:04,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:14:04,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-20 11:14:04,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:14:04,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:14:04,626 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-20 11:14:04,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:14:04,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 11:14:04,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:14:04,627 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-20 11:14:04,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:14:04,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:14:04,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:14:04,858 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:14:04,858 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:14:04,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:14:04 BoogieIcfgContainer [2020-07-20 11:14:04,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:14:04,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:14:04,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:14:04,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:14:04,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:14:04" (1/3) ... [2020-07-20 11:14:04,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26e703cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:14:04, skipping insertion in model container [2020-07-20 11:14:04,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:04" (2/3) ... [2020-07-20 11:14:04,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26e703cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:14:04, skipping insertion in model container [2020-07-20 11:14:04,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:14:04" (3/3) ... [2020-07-20 11:14:04,873 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2020-07-20 11:14:04,886 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:14:04,894 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:14:04,911 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:14:04,938 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:14:04,939 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:14:04,939 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:14:04,939 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:14:04,939 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:14:04,939 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:14:04,940 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:14:04,940 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:14:04,965 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-20 11:14:04,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:14:04,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:04,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:04,975 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:04,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:04,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1250208381, now seen corresponding path program 1 times [2020-07-20 11:14:04,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:04,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415254586] [2020-07-20 11:14:04,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:05,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:14:05,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:14:05,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:14:05,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415254586] [2020-07-20 11:14:05,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:14:05,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:14:05,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44934423] [2020-07-20 11:14:05,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:14:05,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:05,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:14:05,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:14:05,302 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-20 11:14:05,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:05,359 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-20 11:14:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:14:05,361 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 11:14:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:05,372 INFO L225 Difference]: With dead ends: 33 [2020-07-20 11:14:05,373 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 11:14:05,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:14:05,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 11:14:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 11:14:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 11:14:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-07-20 11:14:05,422 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-07-20 11:14:05,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:05,423 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-07-20 11:14:05,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:14:05,423 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-07-20 11:14:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:14:05,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:05,426 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:05,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:05,641 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:05,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:05,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1951994857, now seen corresponding path program 1 times [2020-07-20 11:14:05,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:05,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003475717] [2020-07-20 11:14:05,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:05,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:14:05,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:14:05,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:14:05,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003475717] [2020-07-20 11:14:05,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:14:05,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:14:05,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014209288] [2020-07-20 11:14:05,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:14:05,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:05,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:14:05,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:14:05,726 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-07-20 11:14:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:05,748 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-20 11:14:05,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:14:05,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 11:14:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:05,750 INFO L225 Difference]: With dead ends: 25 [2020-07-20 11:14:05,750 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 11:14:05,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:14:05,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 11:14:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-07-20 11:14:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 11:14:05,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-07-20 11:14:05,758 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 20 [2020-07-20 11:14:05,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:05,758 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-07-20 11:14:05,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:14:05,759 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-07-20 11:14:05,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:14:05,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:05,760 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:05,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:05,966 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:05,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:05,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1923365706, now seen corresponding path program 1 times [2020-07-20 11:14:05,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:05,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135796182] [2020-07-20 11:14:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:06,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:14:06,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:14:06,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:14:06,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135796182] [2020-07-20 11:14:06,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:06,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 11:14:06,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365625902] [2020-07-20 11:14:06,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:14:06,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:06,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:14:06,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:14:06,414 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 14 states. [2020-07-20 11:14:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:06,551 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2020-07-20 11:14:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 11:14:06,553 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-07-20 11:14:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:06,554 INFO L225 Difference]: With dead ends: 37 [2020-07-20 11:14:06,554 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:14:06,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-07-20 11:14:06,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:14:06,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:14:06,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:14:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:14:06,557 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-07-20 11:14:06,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:06,557 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:14:06,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:14:06,558 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:14:06,558 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:14:06,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:06,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:14:06,823 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:14:06,824 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:14:06,824 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:14:06,824 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:14:06,824 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:14:06,824 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:14:06,825 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-07-20 11:14:06,825 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-07-20 11:14:06,825 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-07-20 11:14:06,825 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-07-20 11:14:06,825 INFO L268 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-07-20 11:14:06,825 INFO L271 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-07-20 11:14:06,825 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-20 11:14:06,826 INFO L268 CegarLoopResult]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2020-07-20 11:14:06,826 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2020-07-20 11:14:06,826 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2020-07-20 11:14:06,826 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2020-07-20 11:14:06,826 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-20 11:14:06,826 INFO L271 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: true [2020-07-20 11:14:06,826 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 11:14:06,827 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-20 11:14:06,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:14:06 BoogieIcfgContainer [2020-07-20 11:14:06,834 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:14:06,837 INFO L168 Benchmark]: Toolchain (without parser) took 2658.83 ms. Allocated memory was 142.1 MB in the beginning and 231.7 MB in the end (delta: 89.7 MB). Free memory was 107.3 MB in the beginning and 196.7 MB in the end (delta: -89.4 MB). Peak memory consumption was 294.3 kB. Max. memory is 7.1 GB. [2020-07-20 11:14:06,838 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 142.1 MB. Free memory was 125.2 MB in the beginning and 125.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:14:06,839 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.02 ms. Allocated memory is still 142.1 MB. Free memory was 106.9 MB in the beginning and 97.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:14:06,840 INFO L168 Benchmark]: Boogie Preprocessor took 30.90 ms. Allocated memory is still 142.1 MB. Free memory was 97.6 MB in the beginning and 96.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:14:06,841 INFO L168 Benchmark]: RCFGBuilder took 413.88 ms. Allocated memory was 142.1 MB in the beginning and 205.0 MB in the end (delta: 62.9 MB). Free memory was 96.2 MB in the beginning and 173.8 MB in the end (delta: -77.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:14:06,842 INFO L168 Benchmark]: TraceAbstraction took 1969.86 ms. Allocated memory was 205.0 MB in the beginning and 231.7 MB in the end (delta: 26.7 MB). Free memory was 173.1 MB in the beginning and 196.7 MB in the end (delta: -23.6 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:14:06,846 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 142.1 MB. Free memory was 125.2 MB in the beginning and 125.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 238.02 ms. Allocated memory is still 142.1 MB. Free memory was 106.9 MB in the beginning and 97.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.90 ms. Allocated memory is still 142.1 MB. Free memory was 97.6 MB in the beginning and 96.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 413.88 ms. Allocated memory was 142.1 MB in the beginning and 205.0 MB in the end (delta: 62.9 MB). Free memory was 96.2 MB in the beginning and 173.8 MB in the end (delta: -77.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1969.86 ms. Allocated memory was 205.0 MB in the beginning and 231.7 MB in the end (delta: 26.7 MB). Free memory was 173.1 MB in the beginning and 196.7 MB in the end (delta: -23.6 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 57 SDtfs, 8 SDslu, 243 SDs, 0 SdLazy, 57 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 2501 SizeOfPredicates, 4 NumberOfNonLiveVariables, 120 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 8/12 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 correct! Received shutdown request...