./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Addition01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/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 ../sv-benchmarks/c/recursive/Addition01-2.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 91d2600fad1210650d8ad3da481cdcc11b280095 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:28:07,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:28:07,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:28:07,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:28:07,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:28:07,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:28:07,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:28:07,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:28:07,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:28:07,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:28:07,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:28:07,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:28:07,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:28:07,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:28:07,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:28:07,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:28:07,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:28:07,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:28:07,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:28:07,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:28:07,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:28:07,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:28:07,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:28:07,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:28:07,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:28:07,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:28:07,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:28:07,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:28:07,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:28:07,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:28:07,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:28:07,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:28:07,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:28:07,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:28:07,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:28:07,552 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:28:07,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:28:07,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:28:07,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:28:07,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:28:07,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:28:07,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:28:07,580 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:28:07,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:28:07,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:28:07,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:28:07,582 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:28:07,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:28:07,583 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:28:07,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:28:07,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:28:07,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:28:07,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:28:07,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:28:07,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:28:07,586 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:28:07,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:28:07,586 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:28:07,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:28:07,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:28:07,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:28:07,587 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:28:07,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:28:07,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:28:07,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:28:07,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:28:07,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:28:07,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:28:07,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:28:07,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:28:07,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:28:07,590 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> 91d2600fad1210650d8ad3da481cdcc11b280095 [2019-11-28 17:28:07,892 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:28:07,904 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:28:07,909 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:28:07,910 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:28:07,911 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:28:07,911 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Addition01-2.c [2019-11-28 17:28:07,986 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66d44ff3a/e00d9d6d56734ed49abd393b43682c76/FLAGb774139dc [2019-11-28 17:28:08,428 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:28:08,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition01-2.c [2019-11-28 17:28:08,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66d44ff3a/e00d9d6d56734ed49abd393b43682c76/FLAGb774139dc [2019-11-28 17:28:08,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66d44ff3a/e00d9d6d56734ed49abd393b43682c76 [2019-11-28 17:28:08,826 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:28:08,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:28:08,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:28:08,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:28:08,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:28:08,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:28:08" (1/1) ... [2019-11-28 17:28:08,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f61f9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:08, skipping insertion in model container [2019-11-28 17:28:08,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:28:08" (1/1) ... [2019-11-28 17:28:08,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:28:08,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:28:09,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:28:09,029 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:28:09,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:28:09,060 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:28:09,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:09 WrapperNode [2019-11-28 17:28:09,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:28:09,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:28:09,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:28:09,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:28:09,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:09" (1/1) ... [2019-11-28 17:28:09,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:09" (1/1) ... [2019-11-28 17:28:09,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:28:09,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:28:09,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:28:09,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:28:09,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:09" (1/1) ... [2019-11-28 17:28:09,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:09" (1/1) ... [2019-11-28 17:28:09,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:09" (1/1) ... [2019-11-28 17:28:09,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:09" (1/1) ... [2019-11-28 17:28:09,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:09" (1/1) ... [2019-11-28 17:28:09,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:09" (1/1) ... [2019-11-28 17:28:09,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:09" (1/1) ... [2019-11-28 17:28:09,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:28:09,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:28:09,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:28:09,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:28:09,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:09" (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 [2019-11-28 17:28:09,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:28:09,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:28:09,223 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2019-11-28 17:28:09,224 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2019-11-28 17:28:09,406 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:28:09,406 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 17:28:09,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:28:09 BoogieIcfgContainer [2019-11-28 17:28:09,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:28:09,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:28:09,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:28:09,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:28:09,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:28:08" (1/3) ... [2019-11-28 17:28:09,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a9db5a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:28:09, skipping insertion in model container [2019-11-28 17:28:09,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:09" (2/3) ... [2019-11-28 17:28:09,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a9db5a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:28:09, skipping insertion in model container [2019-11-28 17:28:09,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:28:09" (3/3) ... [2019-11-28 17:28:09,415 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition01-2.c [2019-11-28 17:28:09,424 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:28:09,430 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:28:09,442 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:28:09,469 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:28:09,469 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:28:09,469 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:28:09,470 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:28:09,470 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:28:09,470 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:28:09,470 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:28:09,470 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:28:09,491 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-28 17:28:09,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 17:28:09,496 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:09,496 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:09,497 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:09,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:09,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2068195676, now seen corresponding path program 1 times [2019-11-28 17:28:09,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:09,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249370461] [2019-11-28 17:28:09,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:28:09,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249370461] [2019-11-28 17:28:09,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:28:09,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-28 17:28:09,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145162255] [2019-11-28 17:28:09,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 17:28:09,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:09,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 17:28:09,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:28:09,868 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2019-11-28 17:28:10,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:10,026 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-11-28 17:28:10,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 17:28:10,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-28 17:28:10,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:10,038 INFO L225 Difference]: With dead ends: 33 [2019-11-28 17:28:10,039 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 17:28:10,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:28:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 17:28:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 17:28:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 17:28:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2019-11-28 17:28:10,077 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2019-11-28 17:28:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:10,077 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2019-11-28 17:28:10,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 17:28:10,078 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2019-11-28 17:28:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-28 17:28:10,079 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:10,080 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:10,080 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:10,080 INFO L82 PathProgramCache]: Analyzing trace with hash 800728349, now seen corresponding path program 1 times [2019-11-28 17:28:10,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:10,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9492851] [2019-11-28 17:28:10,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:28:10,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9492851] [2019-11-28 17:28:10,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:28:10,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 17:28:10,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508740237] [2019-11-28 17:28:10,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 17:28:10,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:10,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 17:28:10,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 17:28:10,144 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2019-11-28 17:28:10,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:10,173 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-11-28 17:28:10,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 17:28:10,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-28 17:28:10,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:10,176 INFO L225 Difference]: With dead ends: 30 [2019-11-28 17:28:10,176 INFO L226 Difference]: Without dead ends: 22 [2019-11-28 17:28:10,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 17:28:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-28 17:28:10,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-11-28 17:28:10,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 17:28:10,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-28 17:28:10,188 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2019-11-28 17:28:10,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:10,188 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-28 17:28:10,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 17:28:10,189 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-28 17:28:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 17:28:10,190 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:10,190 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:10,190 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:10,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1352688745, now seen corresponding path program 1 times [2019-11-28 17:28:10,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:10,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521031608] [2019-11-28 17:28:10,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 17:28:10,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521031608] [2019-11-28 17:28:10,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588068541] [2019-11-28 17:28:10,484 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:10,522 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-28 17:28:10,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:28:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:28:10,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:28:10,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2019-11-28 17:28:10,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316466497] [2019-11-28 17:28:10,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 17:28:10,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:10,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 17:28:10,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-11-28 17:28:10,745 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 15 states. [2019-11-28 17:28:11,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:11,102 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2019-11-28 17:28:11,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 17:28:11,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-11-28 17:28:11,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:11,104 INFO L225 Difference]: With dead ends: 34 [2019-11-28 17:28:11,105 INFO L226 Difference]: Without dead ends: 28 [2019-11-28 17:28:11,106 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:28:11,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-28 17:28:11,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2019-11-28 17:28:11,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-28 17:28:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-28 17:28:11,113 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2019-11-28 17:28:11,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:11,114 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-28 17:28:11,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 17:28:11,114 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-28 17:28:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-28 17:28:11,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:11,115 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:11,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:11,321 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:11,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:11,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1841388592, now seen corresponding path program 1 times [2019-11-28 17:28:11,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:11,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177946771] [2019-11-28 17:28:11,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:28:11,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177946771] [2019-11-28 17:28:11,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470021253] [2019-11-28 17:28:11,434 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:11,465 INFO L264 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 17:28:11,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:28:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:28:11,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:28:11,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-28 17:28:11,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361726587] [2019-11-28 17:28:11,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 17:28:11,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:11,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 17:28:11,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:28:11,494 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2019-11-28 17:28:11,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:11,561 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-11-28 17:28:11,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:28:11,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-28 17:28:11,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:11,563 INFO L225 Difference]: With dead ends: 27 [2019-11-28 17:28:11,563 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 17:28:11,564 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:28:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 17:28:11,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 17:28:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 17:28:11,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-11-28 17:28:11,571 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 19 [2019-11-28 17:28:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:11,571 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-11-28 17:28:11,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 17:28:11,572 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-11-28 17:28:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-28 17:28:11,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:11,574 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:11,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:11,777 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:11,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:11,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1779834275, now seen corresponding path program 1 times [2019-11-28 17:28:11,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:11,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448412451] [2019-11-28 17:28:11,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-28 17:28:11,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448412451] [2019-11-28 17:28:11,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100696362] [2019-11-28 17:28:11,899 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:11,941 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 17:28:11,942 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:28:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-28 17:28:11,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:28:11,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-28 17:28:11,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236902568] [2019-11-28 17:28:11,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 17:28:11,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:11,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 17:28:11,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:28:11,976 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 7 states. [2019-11-28 17:28:12,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:12,028 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2019-11-28 17:28:12,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:28:12,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-11-28 17:28:12,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:12,030 INFO L225 Difference]: With dead ends: 28 [2019-11-28 17:28:12,030 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 17:28:12,030 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:28:12,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 17:28:12,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 17:28:12,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 17:28:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 17:28:12,031 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2019-11-28 17:28:12,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:12,032 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 17:28:12,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 17:28:12,032 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 17:28:12,032 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 17:28:12,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:12,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 17:28:12,311 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 17:28:12,311 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 17:28:12,311 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 17:28:12,311 INFO L246 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2019-11-28 17:28:12,312 INFO L249 CegarLoopResult]: At program point L26(lines 26 45) the Hoare annotation is: true [2019-11-28 17:28:12,312 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2019-11-28 17:28:12,312 INFO L246 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2019-11-28 17:28:12,312 INFO L246 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2019-11-28 17:28:12,312 INFO L242 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (<= 0 ULTIMATE.start_main_~n~0) [2019-11-28 17:28:12,313 INFO L246 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2019-11-28 17:28:12,313 INFO L246 CegarLoopResult]: For program point L34(lines 34 38) no Hoare annotation was computed. [2019-11-28 17:28:12,313 INFO L246 CegarLoopResult]: For program point additionFINAL(lines 13 23) no Hoare annotation was computed. [2019-11-28 17:28:12,313 INFO L242 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (= |addition_#in~n| addition_~n) (= |addition_#in~m| addition_~m) (<= (+ addition_~n 1) 0)) [2019-11-28 17:28:12,313 INFO L246 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2019-11-28 17:28:12,313 INFO L246 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-11-28 17:28:12,313 INFO L242 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (= |addition_#in~n| addition_~n) (= |addition_#in~m| addition_~m) (<= 1 addition_~n)) [2019-11-28 17:28:12,314 INFO L246 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2019-11-28 17:28:12,314 INFO L246 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2019-11-28 17:28:12,314 INFO L249 CegarLoopResult]: At program point additionENTRY(lines 13 23) the Hoare annotation is: true [2019-11-28 17:28:12,314 INFO L246 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2019-11-28 17:28:12,314 INFO L246 CegarLoopResult]: For program point additionEXIT(lines 13 23) no Hoare annotation was computed. [2019-11-28 17:28:12,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:28:12 BoogieIcfgContainer [2019-11-28 17:28:12,324 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:28:12,325 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:28:12,325 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:28:12,325 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:28:12,326 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:28:09" (3/4) ... [2019-11-28 17:28:12,329 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 17:28:12,335 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure addition [2019-11-28 17:28:12,341 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 17:28:12,341 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-28 17:28:12,393 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:28:12,393 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:28:12,396 INFO L168 Benchmark]: Toolchain (without parser) took 3568.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.1 MB). Free memory was 960.4 MB in the beginning and 908.5 MB in the end (delta: 51.9 MB). Peak memory consumption was 184.0 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:12,397 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:28:12,397 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.59 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:12,398 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.1 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -179.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:12,399 INFO L168 Benchmark]: Boogie Preprocessor took 17.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:12,400 INFO L168 Benchmark]: RCFGBuilder took 243.18 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:12,400 INFO L168 Benchmark]: TraceAbstraction took 2916.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 908.5 MB in the end (delta: 200.9 MB). Peak memory consumption was 200.9 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:12,401 INFO L168 Benchmark]: Witness Printer took 68.73 ms. Allocated memory is still 1.2 GB. Free memory is still 908.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:28:12,405 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 233.59 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 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 84.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.1 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -179.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 243.18 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2916.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 908.5 MB in the end (delta: 200.9 MB). Peak memory consumption was 200.9 MB. Max. memory is 11.5 GB. * Witness Printer took 68.73 ms. Allocated memory is still 1.2 GB. Free memory is still 908.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Result: SAFE, OverallTime: 2.7s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 80 SDtfs, 57 SDslu, 172 SDs, 0 SdLazy, 352 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, 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, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 11 PreInvPairs, 13 NumberOfFragments, 27 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 11 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 150 NumberOfCodeBlocks, 150 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 8567 SizeOfPredicates, 11 NumberOfNonLiveVariables, 189 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 33/42 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...