./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/alt_test.i --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/ldv-regression/alt_test.i -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 28a1c96d0dcbab8e66df0b7e0c92c558fac63e78 .......................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 16:57:05,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 16:57:05,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 16:57:05,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 16:57:05,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 16:57:05,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 16:57:05,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 16:57:05,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 16:57:05,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 16:57:05,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 16:57:05,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 16:57:05,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 16:57:05,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 16:57:05,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 16:57:05,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 16:57:05,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 16:57:05,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 16:57:05,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 16:57:05,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 16:57:05,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 16:57:05,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 16:57:05,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 16:57:05,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 16:57:05,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 16:57:05,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 16:57:05,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 16:57:05,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 16:57:05,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 16:57:05,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 16:57:05,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 16:57:05,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 16:57:05,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 16:57:05,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 16:57:05,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 16:57:05,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 16:57:05,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 16:57:05,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 16:57:05,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 16:57:05,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 16:57:05,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 16:57:05,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 16:57:05,454 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 16:57:05,469 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 16:57:05,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 16:57:05,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 16:57:05,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 16:57:05,471 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 16:57:05,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 16:57:05,472 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 16:57:05,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 16:57:05,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 16:57:05,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 16:57:05,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 16:57:05,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 16:57:05,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 16:57:05,473 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 16:57:05,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 16:57:05,473 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 16:57:05,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 16:57:05,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 16:57:05,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 16:57:05,474 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 16:57:05,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 16:57:05,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:57:05,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 16:57:05,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 16:57:05,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 16:57:05,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 16:57:05,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 16:57:05,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 16:57:05,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 16:57:05,477 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 -> 28a1c96d0dcbab8e66df0b7e0c92c558fac63e78 [2019-11-28 16:57:05,861 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 16:57:05,875 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 16:57:05,879 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 16:57:05,881 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 16:57:05,881 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 16:57:05,882 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/alt_test.i [2019-11-28 16:57:05,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57f8ff370/1148c08e4e2144d284fed17e4faa1edf/FLAGaf4da15b8 [2019-11-28 16:57:06,612 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 16:57:06,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/alt_test.i [2019-11-28 16:57:06,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57f8ff370/1148c08e4e2144d284fed17e4faa1edf/FLAGaf4da15b8 [2019-11-28 16:57:06,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57f8ff370/1148c08e4e2144d284fed17e4faa1edf [2019-11-28 16:57:06,784 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 16:57:06,786 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 16:57:06,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 16:57:06,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 16:57:06,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 16:57:06,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:57:06" (1/1) ... [2019-11-28 16:57:06,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb6c85c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:06, skipping insertion in model container [2019-11-28 16:57:06,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:57:06" (1/1) ... [2019-11-28 16:57:06,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 16:57:06,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 16:57:07,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:57:07,373 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 16:57:07,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:57:07,532 INFO L208 MainTranslator]: Completed translation [2019-11-28 16:57:07,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:07 WrapperNode [2019-11-28 16:57:07,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 16:57:07,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 16:57:07,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 16:57:07,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 16:57:07,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:07" (1/1) ... [2019-11-28 16:57:07,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:07" (1/1) ... [2019-11-28 16:57:07,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 16:57:07,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 16:57:07,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 16:57:07,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 16:57:07,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:07" (1/1) ... [2019-11-28 16:57:07,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:07" (1/1) ... [2019-11-28 16:57:07,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:07" (1/1) ... [2019-11-28 16:57:07,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:07" (1/1) ... [2019-11-28 16:57:07,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:07" (1/1) ... [2019-11-28 16:57:07,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:07" (1/1) ... [2019-11-28 16:57:07,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:07" (1/1) ... [2019-11-28 16:57:07,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 16:57:07,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 16:57:07,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 16:57:07,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 16:57:07,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:07" (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 16:57:07,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 16:57:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 16:57:07,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 16:57:07,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 16:57:08,051 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 16:57:08,052 INFO L287 CfgBuilder]: Removed 14 assume(true) statements. [2019-11-28 16:57:08,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:08 BoogieIcfgContainer [2019-11-28 16:57:08,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 16:57:08,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 16:57:08,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 16:57:08,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 16:57:08,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:57:06" (1/3) ... [2019-11-28 16:57:08,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c17e322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:57:08, skipping insertion in model container [2019-11-28 16:57:08,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:07" (2/3) ... [2019-11-28 16:57:08,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c17e322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:57:08, skipping insertion in model container [2019-11-28 16:57:08,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:08" (3/3) ... [2019-11-28 16:57:08,062 INFO L109 eAbstractionObserver]: Analyzing ICFG alt_test.i [2019-11-28 16:57:08,072 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 16:57:08,079 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-28 16:57:08,091 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-28 16:57:08,117 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 16:57:08,118 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 16:57:08,118 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 16:57:08,118 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 16:57:08,118 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 16:57:08,119 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 16:57:08,119 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 16:57:08,119 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 16:57:08,135 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-28 16:57:08,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 16:57:08,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:08,143 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:08,144 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:08,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:08,149 INFO L82 PathProgramCache]: Analyzing trace with hash 119352108, now seen corresponding path program 1 times [2019-11-28 16:57:08,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:08,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7928525] [2019-11-28 16:57:08,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:08,324 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 16:57:08,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7928525] [2019-11-28 16:57:08,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:57:08,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 16:57:08,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047794708] [2019-11-28 16:57:08,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 16:57:08,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:08,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 16:57:08,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 16:57:08,351 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-28 16:57:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:08,407 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-11-28 16:57:08,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 16:57:08,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-28 16:57:08,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:08,419 INFO L225 Difference]: With dead ends: 39 [2019-11-28 16:57:08,419 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 16:57:08,422 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 16:57:08,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 16:57:08,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-28 16:57:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 16:57:08,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-28 16:57:08,452 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 8 [2019-11-28 16:57:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:08,452 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-28 16:57:08,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 16:57:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-28 16:57:08,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 16:57:08,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:08,453 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:08,454 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:08,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:08,454 INFO L82 PathProgramCache]: Analyzing trace with hash 176610410, now seen corresponding path program 1 times [2019-11-28 16:57:08,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:08,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185806470] [2019-11-28 16:57:08,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:08,522 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 16:57:08,522 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185806470] [2019-11-28 16:57:08,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:57:08,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 16:57:08,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946637444] [2019-11-28 16:57:08,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 16:57:08,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:08,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 16:57:08,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 16:57:08,529 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2019-11-28 16:57:08,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:08,550 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-11-28 16:57:08,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 16:57:08,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-28 16:57:08,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:08,552 INFO L225 Difference]: With dead ends: 25 [2019-11-28 16:57:08,552 INFO L226 Difference]: Without dead ends: 13 [2019-11-28 16:57:08,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 16:57:08,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-28 16:57:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-28 16:57:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-28 16:57:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-28 16:57:08,560 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2019-11-28 16:57:08,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:08,561 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-28 16:57:08,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 16:57:08,562 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-28 16:57:08,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 16:57:08,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:08,564 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:08,565 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:08,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:08,565 INFO L82 PathProgramCache]: Analyzing trace with hash -262109109, now seen corresponding path program 1 times [2019-11-28 16:57:08,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:08,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397813241] [2019-11-28 16:57:08,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:08,649 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 16:57:08,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397813241] [2019-11-28 16:57:08,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:57:08,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 16:57:08,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807631931] [2019-11-28 16:57:08,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 16:57:08,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:08,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 16:57:08,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:57:08,652 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2019-11-28 16:57:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:08,733 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2019-11-28 16:57:08,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 16:57:08,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-28 16:57:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:08,736 INFO L225 Difference]: With dead ends: 19 [2019-11-28 16:57:08,736 INFO L226 Difference]: Without dead ends: 13 [2019-11-28 16:57:08,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-28 16:57:08,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-28 16:57:08,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-28 16:57:08,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-28 16:57:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 12 transitions. [2019-11-28 16:57:08,740 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 12 transitions. Word has length 11 [2019-11-28 16:57:08,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:08,741 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 12 transitions. [2019-11-28 16:57:08,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 16:57:08,741 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 12 transitions. [2019-11-28 16:57:08,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 16:57:08,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:08,742 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:08,742 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:08,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:08,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1912419270, now seen corresponding path program 1 times [2019-11-28 16:57:08,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:08,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210116682] [2019-11-28 16:57:08,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:57:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:57:08,801 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 16:57:08,801 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 16:57:08,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:57:08 BoogieIcfgContainer [2019-11-28 16:57:08,836 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 16:57:08,836 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 16:57:08,837 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 16:57:08,837 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 16:57:08,837 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:08" (3/4) ... [2019-11-28 16:57:08,840 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 16:57:08,902 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 16:57:08,902 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 16:57:08,904 INFO L168 Benchmark]: Toolchain (without parser) took 2117.82 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.8 MB). Free memory was 956.3 MB in the beginning and 970.3 MB in the end (delta: -14.0 MB). Peak memory consumption was 68.8 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:08,905 INFO L168 Benchmark]: CDTParser took 0.32 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 16:57:08,906 INFO L168 Benchmark]: CACSL2BoogieTranslator took 742.63 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.8 MB). Free memory was 956.3 MB in the beginning and 1.0 GB in the end (delta: -80.8 MB). Peak memory consumption was 26.0 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:08,907 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.50 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:57:08,907 INFO L168 Benchmark]: Boogie Preprocessor took 25.27 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:57:08,908 INFO L168 Benchmark]: RCFGBuilder took 436.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:08,909 INFO L168 Benchmark]: TraceAbstraction took 781.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 977.2 MB in the end (delta: 41.5 MB). Peak memory consumption was 41.5 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:08,910 INFO L168 Benchmark]: Witness Printer took 65.65 ms. Allocated memory is still 1.1 GB. Free memory was 977.2 MB in the beginning and 970.3 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:08,914 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 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 742.63 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.8 MB). Free memory was 956.3 MB in the beginning and 1.0 GB in the end (delta: -80.8 MB). Peak memory consumption was 26.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 57.50 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.27 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 436.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 781.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 977.2 MB in the end (delta: 41.5 MB). Peak memory consumption was 41.5 MB. Max. memory is 11.5 GB. * Witness Printer took 65.65 ms. Allocated memory is still 1.1 GB. Free memory was 977.2 MB in the beginning and 970.3 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1601]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1606] int globalState = 0; VAL [globalState=0] [L1619] void *retVal = malloc(size); VAL [globalState=0] [L1620] COND TRUE retVal != ((void *)0) [L1621] globalState=1 VAL [globalState=1] [L1622] return retVal; VAL [globalState=1] [L1612] int *a = (int*) l_malloc(sizeof(int)); [L1629] COND TRUE ptr!=((void *)0) VAL [globalState=1] [L1629] (globalState == 1) ? (0) : __blast_assert () VAL [globalState=1] [L1630] globalState = 0 [L1629] COND TRUE ptr!=((void *)0) VAL [globalState=0] [L1629] (globalState == 1) ? (0) : __blast_assert () VAL [globalState=0] [L1601] __VERIFIER_error() VAL [globalState=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Result: UNSAFE, OverallTime: 0.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 33 SDslu, 21 SDs, 0 SdLazy, 20 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 395 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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 incorrect! Received shutdown request...