./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 91b1670e Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/recursive-simple/id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 128b2219e8f86913777da69c49be5957c6dd8c80 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-91b1670 [2018-11-28 18:52:34,689 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:52:34,691 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:52:34,709 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:52:34,710 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:52:34,712 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:52:34,714 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:52:34,717 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:52:34,720 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:52:34,721 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:52:34,724 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:52:34,725 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:52:34,726 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:52:34,727 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:52:34,728 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:52:34,731 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:52:34,732 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:52:34,736 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:52:34,748 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:52:34,750 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:52:34,751 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:52:34,754 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:52:34,760 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:52:34,761 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:52:34,761 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:52:34,762 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:52:34,763 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:52:34,764 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:52:34,764 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:52:34,768 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:52:34,768 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:52:34,770 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:52:34,772 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:52:34,772 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:52:34,773 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:52:34,775 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:52:34,775 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:52:34,800 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:52:34,800 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:52:34,802 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:52:34,802 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:52:34,803 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:52:34,803 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:52:34,803 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:52:34,803 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:52:34,803 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:52:34,803 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:52:34,805 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:52:34,805 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:52:34,805 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:52:34,805 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:52:34,805 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:52:34,806 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:52:34,806 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:52:34,806 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:52:34,806 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:52:34,806 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:52:34,807 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:52:34,809 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:52:34,809 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:52:34,809 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:52:34,809 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:52:34,810 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:52:34,810 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:52:34,810 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:52:34,810 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:52:34,810 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:52:34,810 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 128b2219e8f86913777da69c49be5957c6dd8c80 [2018-11-28 18:52:34,848 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:52:34,861 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:52:34,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:52:34,867 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:52:34,867 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:52:34,868 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c [2018-11-28 18:52:34,927 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb5793120/43e6511922454d32a81f48b98bfd35df/FLAGd3e80d98c [2018-11-28 18:52:35,368 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:52:35,368 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c [2018-11-28 18:52:35,376 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb5793120/43e6511922454d32a81f48b98bfd35df/FLAGd3e80d98c [2018-11-28 18:52:35,737 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb5793120/43e6511922454d32a81f48b98bfd35df [2018-11-28 18:52:35,742 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:52:35,743 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:52:35,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:52:35,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:52:35,748 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:52:35,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:52:35" (1/1) ... [2018-11-28 18:52:35,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@427b1d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:35, skipping insertion in model container [2018-11-28 18:52:35,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:52:35" (1/1) ... [2018-11-28 18:52:35,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:52:35,783 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:52:36,011 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:52:36,018 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:52:36,040 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:52:36,058 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:52:36,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:36 WrapperNode [2018-11-28 18:52:36,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:52:36,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:52:36,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:52:36,060 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:52:36,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:36" (1/1) ... [2018-11-28 18:52:36,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:36" (1/1) ... [2018-11-28 18:52:36,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:52:36,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:52:36,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:52:36,086 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:52:36,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:36" (1/1) ... [2018-11-28 18:52:36,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:36" (1/1) ... [2018-11-28 18:52:36,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:36" (1/1) ... [2018-11-28 18:52:36,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:36" (1/1) ... [2018-11-28 18:52:36,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:36" (1/1) ... [2018-11-28 18:52:36,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:36" (1/1) ... [2018-11-28 18:52:36,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:36" (1/1) ... [2018-11-28 18:52:36,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:52:36,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:52:36,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:52:36,111 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:52:36,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:36" (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 [2018-11-28 18:52:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:52:36,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:52:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:52:36,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:52:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:52:36,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:52:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-28 18:52:36,241 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-28 18:52:36,436 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:52:36,437 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 18:52:36,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:36 BoogieIcfgContainer [2018-11-28 18:52:36,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:52:36,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:52:36,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:52:36,442 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:52:36,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:52:35" (1/3) ... [2018-11-28 18:52:36,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b440435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:52:36, skipping insertion in model container [2018-11-28 18:52:36,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:36" (2/3) ... [2018-11-28 18:52:36,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b440435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:52:36, skipping insertion in model container [2018-11-28 18:52:36,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:36" (3/3) ... [2018-11-28 18:52:36,446 INFO L112 eAbstractionObserver]: Analyzing ICFG id_b2_o3_true-unreach-call_true-termination_true-no-overflow.c [2018-11-28 18:52:36,457 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:52:36,466 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:52:36,484 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:52:36,517 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:52:36,518 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:52:36,518 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:52:36,518 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:52:36,518 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:52:36,518 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:52:36,519 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:52:36,519 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:52:36,519 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:52:36,539 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-11-28 18:52:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 18:52:36,545 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:36,547 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:36,549 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:36,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:36,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1250208381, now seen corresponding path program 1 times [2018-11-28 18:52:36,562 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:36,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:36,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:36,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:36,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:52:37,041 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:52:37,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:52:37,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:52:37,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:52:37,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:52:37,062 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2018-11-28 18:52:37,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:37,125 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-11-28 18:52:37,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:52:37,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 18:52:37,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:37,146 INFO L225 Difference]: With dead ends: 33 [2018-11-28 18:52:37,146 INFO L226 Difference]: Without dead ends: 19 [2018-11-28 18:52:37,150 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:52:37,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-28 18:52:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-28 18:52:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-28 18:52:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-11-28 18:52:37,192 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2018-11-28 18:52:37,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:37,193 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-11-28 18:52:37,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:52:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-11-28 18:52:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-28 18:52:37,199 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:37,199 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:37,200 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:37,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:37,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1951994857, now seen corresponding path program 1 times [2018-11-28 18:52:37,201 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:37,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:37,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:37,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:37,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 18:52:37,395 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:52:37,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:52:37,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:52:37,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:52:37,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:52:37,403 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2018-11-28 18:52:37,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:37,487 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2018-11-28 18:52:37,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:52:37,489 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-28 18:52:37,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:37,490 INFO L225 Difference]: With dead ends: 31 [2018-11-28 18:52:37,490 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 18:52:37,492 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:52:37,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 18:52:37,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-28 18:52:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 18:52:37,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-11-28 18:52:37,504 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2018-11-28 18:52:37,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:37,504 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-11-28 18:52:37,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:52:37,505 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-11-28 18:52:37,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-28 18:52:37,506 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:37,506 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:37,506 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:37,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:37,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1923365706, now seen corresponding path program 1 times [2018-11-28 18:52:37,507 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:37,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:37,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:37,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:37,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 18:52:37,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:37,886 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:37,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:37,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 18:52:38,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:38,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 18:52:38,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 18:52:38,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 18:52:38,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-28 18:52:38,085 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 9 states. [2018-11-28 18:52:38,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:38,281 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-11-28 18:52:38,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 18:52:38,284 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-11-28 18:52:38,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:38,285 INFO L225 Difference]: With dead ends: 27 [2018-11-28 18:52:38,285 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 18:52:38,286 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-28 18:52:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 18:52:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-28 18:52:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 18:52:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-11-28 18:52:38,293 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-11-28 18:52:38,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:38,293 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-28 18:52:38,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 18:52:38,293 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-11-28 18:52:38,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 18:52:38,295 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:38,295 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:38,295 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:38,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:38,296 INFO L82 PathProgramCache]: Analyzing trace with hash 376843494, now seen corresponding path program 1 times [2018-11-28 18:52:38,296 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:38,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:38,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:38,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:38,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-28 18:52:38,512 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:52:38,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:52:38,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:52:38,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:52:38,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:52:38,514 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2018-11-28 18:52:38,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:38,534 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-11-28 18:52:38,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:52:38,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-11-28 18:52:38,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:38,537 INFO L225 Difference]: With dead ends: 29 [2018-11-28 18:52:38,537 INFO L226 Difference]: Without dead ends: 25 [2018-11-28 18:52:38,538 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:52:38,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-28 18:52:38,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-11-28 18:52:38,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 18:52:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-11-28 18:52:38,544 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 27 [2018-11-28 18:52:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:38,545 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-28 18:52:38,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:52:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-11-28 18:52:38,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 18:52:38,546 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:38,546 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:38,547 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:38,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:38,547 INFO L82 PathProgramCache]: Analyzing trace with hash 405472645, now seen corresponding path program 2 times [2018-11-28 18:52:38,547 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:38,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:38,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:38,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:38,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-28 18:52:39,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:39,243 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:39,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:52:39,281 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:52:39,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:39,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-28 18:52:39,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:39,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-28 18:52:39,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 18:52:39,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 18:52:39,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:52:39,403 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 12 states. [2018-11-28 18:52:39,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:39,576 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2018-11-28 18:52:39,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 18:52:39,577 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-11-28 18:52:39,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:39,579 INFO L225 Difference]: With dead ends: 41 [2018-11-28 18:52:39,580 INFO L226 Difference]: Without dead ends: 29 [2018-11-28 18:52:39,580 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:52:39,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-28 18:52:39,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2018-11-28 18:52:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-28 18:52:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-11-28 18:52:39,587 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 27 [2018-11-28 18:52:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:39,588 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-11-28 18:52:39,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 18:52:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-11-28 18:52:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-28 18:52:39,589 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:39,589 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:39,590 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:39,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:39,590 INFO L82 PathProgramCache]: Analyzing trace with hash -617031938, now seen corresponding path program 3 times [2018-11-28 18:52:39,590 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:39,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:39,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:39,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:39,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 18:52:39,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:39,863 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:39,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:52:39,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-28 18:52:39,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:39,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-28 18:52:40,006 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 18:52:40,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2018-11-28 18:52:40,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 18:52:40,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 18:52:40,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:52:40,008 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 14 states. [2018-11-28 18:52:40,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:40,191 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-11-28 18:52:40,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 18:52:40,194 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2018-11-28 18:52:40,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:40,195 INFO L225 Difference]: With dead ends: 33 [2018-11-28 18:52:40,195 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 18:52:40,197 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2018-11-28 18:52:40,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 18:52:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 18:52:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 18:52:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 18:52:40,198 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2018-11-28 18:52:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:40,198 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 18:52:40,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 18:52:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 18:52:40,199 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 18:52:40,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 18:52:40,229 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 18:52:40,230 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:52:40,230 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:52:40,230 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 18:52:40,230 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 18:52:40,230 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 18:52:40,231 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2018-11-28 18:52:40,231 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2018-11-28 18:52:40,231 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2018-11-28 18:52:40,231 INFO L448 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-11-28 18:52:40,231 INFO L448 ceAbstractionStarter]: For program point L14(lines 14 16) no Hoare annotation was computed. [2018-11-28 18:52:40,231 INFO L451 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: true [2018-11-28 18:52:40,232 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-28 18:52:40,232 INFO L448 ceAbstractionStarter]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2018-11-28 18:52:40,232 INFO L448 ceAbstractionStarter]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2018-11-28 18:52:40,232 INFO L448 ceAbstractionStarter]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2018-11-28 18:52:40,232 INFO L451 ceAbstractionStarter]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2018-11-28 18:52:40,232 INFO L448 ceAbstractionStarter]: For program point L7(line 7) no Hoare annotation was computed. [2018-11-28 18:52:40,232 INFO L451 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: true [2018-11-28 18:52:40,232 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-28 18:52:40,234 INFO L448 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-11-28 18:52:40,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:52:40 BoogieIcfgContainer [2018-11-28 18:52:40,237 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:52:40,238 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:52:40,238 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:52:40,238 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:52:40,238 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:36" (3/4) ... [2018-11-28 18:52:40,241 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 18:52:40,248 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 18:52:40,249 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 18:52:40,249 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-28 18:52:40,253 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 18:52:40,253 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 18:52:40,254 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 18:52:40,298 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:52:40,299 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:52:40,300 INFO L168 Benchmark]: Toolchain (without parser) took 4557.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 945.9 MB in the beginning and 944.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 141.3 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:40,302 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:40,302 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.69 ms. Allocated memory is still 1.0 GB. Free memory was 945.9 MB in the beginning and 935.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:40,303 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.12 ms. Allocated memory is still 1.0 GB. Free memory is still 935.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:40,303 INFO L168 Benchmark]: Boogie Preprocessor took 24.32 ms. Allocated memory is still 1.0 GB. Free memory is still 935.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:40,304 INFO L168 Benchmark]: RCFGBuilder took 327.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 935.2 MB in the beginning and 1.1 GB in the end (delta: -189.3 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:40,305 INFO L168 Benchmark]: TraceAbstraction took 3798.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 944.1 MB in the end (delta: 173.7 MB). Peak memory consumption was 173.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:40,306 INFO L168 Benchmark]: Witness Printer took 61.30 ms. Allocated memory is still 1.2 GB. Free memory is still 944.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:40,309 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 314.69 ms. Allocated memory is still 1.0 GB. Free memory was 945.9 MB in the beginning and 935.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.12 ms. Allocated memory is still 1.0 GB. Free memory is still 935.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.32 ms. Allocated memory is still 1.0 GB. Free memory is still 935.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 327.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 935.2 MB in the beginning and 1.1 GB in the end (delta: -189.3 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3798.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 944.1 MB in the end (delta: 173.7 MB). Peak memory consumption was 173.7 MB. Max. memory is 11.5 GB. * Witness Printer took 61.30 ms. Allocated memory is still 1.2 GB. Free memory is still 944.1 MB. There was no memory consumed. Max. memory is 11.5 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. SAFE Result, 3.7s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 116 SDtfs, 16 SDslu, 609 SDs, 0 SdLazy, 187 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 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: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 222 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 213 ConstructedInterpolants, 0 QuantifiedInterpolants, 15747 SizeOfPredicates, 7 NumberOfNonLiveVariables, 150 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 91/123 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...