./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann02.c -s /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer --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 dd82318ec795f8c5ba1d6bd1e94de4995b910941 ............................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.1.24-678e011 [2019-11-20 03:42:46,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 03:42:46,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 03:42:46,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 03:42:46,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 03:42:46,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 03:42:46,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 03:42:46,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 03:42:46,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 03:42:46,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 03:42:46,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 03:42:46,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 03:42:46,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 03:42:46,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 03:42:46,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 03:42:46,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 03:42:46,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 03:42:46,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 03:42:46,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 03:42:46,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 03:42:46,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 03:42:46,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 03:42:46,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 03:42:46,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 03:42:46,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 03:42:46,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 03:42:46,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 03:42:46,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 03:42:46,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 03:42:46,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 03:42:46,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 03:42:46,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 03:42:46,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 03:42:46,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 03:42:46,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 03:42:46,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 03:42:46,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 03:42:46,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 03:42:46,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 03:42:46,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 03:42:46,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 03:42:46,130 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 03:42:46,144 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 03:42:46,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 03:42:46,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 03:42:46,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 03:42:46,146 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 03:42:46,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 03:42:46,147 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 03:42:46,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 03:42:46,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 03:42:46,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 03:42:46,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 03:42:46,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 03:42:46,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 03:42:46,149 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 03:42:46,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 03:42:46,149 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 03:42:46,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 03:42:46,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 03:42:46,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 03:42:46,150 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 03:42:46,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 03:42:46,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 03:42:46,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 03:42:46,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 03:42:46,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 03:42:46,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 03:42:46,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 03:42:46,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 03:42:46,153 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer 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 -> dd82318ec795f8c5ba1d6bd1e94de4995b910941 [2019-11-20 03:42:46,315 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 03:42:46,325 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 03:42:46,328 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 03:42:46,329 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 03:42:46,330 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 03:42:46,330 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer/../../sv-benchmarks/c/recursive/Ackermann02.c [2019-11-20 03:42:46,378 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer/data/a2fdad90c/4f8b3bbf911b4d33b5c5308779770ca3/FLAG08ef35c6b [2019-11-20 03:42:46,767 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 03:42:46,767 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/sv-benchmarks/c/recursive/Ackermann02.c [2019-11-20 03:42:46,773 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer/data/a2fdad90c/4f8b3bbf911b4d33b5c5308779770ca3/FLAG08ef35c6b [2019-11-20 03:42:46,786 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer/data/a2fdad90c/4f8b3bbf911b4d33b5c5308779770ca3 [2019-11-20 03:42:46,789 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 03:42:46,790 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 03:42:46,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 03:42:46,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 03:42:46,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 03:42:46,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:42:46" (1/1) ... [2019-11-20 03:42:46,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e22ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:42:46, skipping insertion in model container [2019-11-20 03:42:46,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:42:46" (1/1) ... [2019-11-20 03:42:46,805 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 03:42:46,820 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 03:42:46,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:42:46,979 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 03:42:47,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:42:47,064 INFO L192 MainTranslator]: Completed translation [2019-11-20 03:42:47,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:42:47 WrapperNode [2019-11-20 03:42:47,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 03:42:47,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 03:42:47,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 03:42:47,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 03:42:47,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:42:47" (1/1) ... [2019-11-20 03:42:47,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:42:47" (1/1) ... [2019-11-20 03:42:47,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 03:42:47,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 03:42:47,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 03:42:47,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 03:42:47,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:42:47" (1/1) ... [2019-11-20 03:42:47,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:42:47" (1/1) ... [2019-11-20 03:42:47,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:42:47" (1/1) ... [2019-11-20 03:42:47,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:42:47" (1/1) ... [2019-11-20 03:42:47,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:42:47" (1/1) ... [2019-11-20 03:42:47,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:42:47" (1/1) ... [2019-11-20 03:42:47,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:42:47" (1/1) ... [2019-11-20 03:42:47,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 03:42:47,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 03:42:47,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 03:42:47,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 03:42:47,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:42:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer/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 [2019-11-20 03:42:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 03:42:47,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 03:42:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-11-20 03:42:47,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-11-20 03:42:47,507 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 03:42:47,511 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 03:42:47,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:42:47 BoogieIcfgContainer [2019-11-20 03:42:47,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 03:42:47,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 03:42:47,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 03:42:47,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 03:42:47,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 03:42:46" (1/3) ... [2019-11-20 03:42:47,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7c1cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:42:47, skipping insertion in model container [2019-11-20 03:42:47,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:42:47" (2/3) ... [2019-11-20 03:42:47,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7c1cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:42:47, skipping insertion in model container [2019-11-20 03:42:47,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:42:47" (3/3) ... [2019-11-20 03:42:47,523 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2019-11-20 03:42:47,531 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 03:42:47,537 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 03:42:47,548 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 03:42:47,574 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 03:42:47,574 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 03:42:47,574 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 03:42:47,575 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 03:42:47,575 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 03:42:47,576 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 03:42:47,576 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 03:42:47,576 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 03:42:47,594 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-20 03:42:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 03:42:47,599 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:42:47,600 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:42:47,600 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:42:47,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:42:47,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1260755674, now seen corresponding path program 1 times [2019-11-20 03:42:47,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:42:47,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127448268] [2019-11-20 03:42:47,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:42:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:42:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:42:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:42:47,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127448268] [2019-11-20 03:42:47,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:42:47,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 03:42:47,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810886553] [2019-11-20 03:42:47,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 03:42:47,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:42:47,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 03:42:47,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 03:42:47,800 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2019-11-20 03:42:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:42:47,929 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2019-11-20 03:42:47,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 03:42:47,930 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-20 03:42:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:42:47,938 INFO L225 Difference]: With dead ends: 50 [2019-11-20 03:42:47,939 INFO L226 Difference]: Without dead ends: 24 [2019-11-20 03:42:47,942 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 03:42:47,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-20 03:42:47,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-20 03:42:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-20 03:42:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-20 03:42:47,978 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2019-11-20 03:42:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:42:47,978 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-20 03:42:47,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 03:42:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-20 03:42:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 03:42:47,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:42:47,981 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:42:47,981 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:42:47,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:42:47,981 INFO L82 PathProgramCache]: Analyzing trace with hash 963920485, now seen corresponding path program 1 times [2019-11-20 03:42:47,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:42:47,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558609444] [2019-11-20 03:42:47,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:42:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:42:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:42:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:42:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 03:42:48,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558609444] [2019-11-20 03:42:48,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488054288] [2019-11-20 03:42:48,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer/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 [2019-11-20 03:42:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:42:48,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 03:42:48,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:42:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 03:42:48,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:42:48,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-11-20 03:42:48,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642527705] [2019-11-20 03:42:48,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 03:42:48,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:42:48,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 03:42:48,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-20 03:42:48,291 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 8 states. [2019-11-20 03:42:48,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:42:48,427 INFO L93 Difference]: Finished difference Result 56 states and 90 transitions. [2019-11-20 03:42:48,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 03:42:48,427 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-20 03:42:48,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:42:48,429 INFO L225 Difference]: With dead ends: 56 [2019-11-20 03:42:48,429 INFO L226 Difference]: Without dead ends: 29 [2019-11-20 03:42:48,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-20 03:42:48,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-20 03:42:48,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-20 03:42:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-20 03:42:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2019-11-20 03:42:48,439 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 18 [2019-11-20 03:42:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:42:48,439 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2019-11-20 03:42:48,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 03:42:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2019-11-20 03:42:48,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-20 03:42:48,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:42:48,441 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:42:48,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:42:48,645 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:42:48,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:42:48,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1741315320, now seen corresponding path program 2 times [2019-11-20 03:42:48,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:42:48,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144849650] [2019-11-20 03:42:48,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:42:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:42:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:42:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:42:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:42:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-20 03:42:48,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144849650] [2019-11-20 03:42:48,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920945374] [2019-11-20 03:42:48,748 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer/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 [2019-11-20 03:42:48,792 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:42:48,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:42:48,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 03:42:48,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:42:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-20 03:42:48,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:42:48,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-20 03:42:48,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934784699] [2019-11-20 03:42:48,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 03:42:48,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:42:48,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 03:42:48,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 03:42:48,824 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 6 states. [2019-11-20 03:42:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:42:48,895 INFO L93 Difference]: Finished difference Result 58 states and 85 transitions. [2019-11-20 03:42:48,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 03:42:48,897 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-20 03:42:48,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:42:48,899 INFO L225 Difference]: With dead ends: 58 [2019-11-20 03:42:48,899 INFO L226 Difference]: Without dead ends: 33 [2019-11-20 03:42:48,900 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-20 03:42:48,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-20 03:42:48,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-20 03:42:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 03:42:48,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2019-11-20 03:42:48,926 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 25 [2019-11-20 03:42:48,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:42:48,927 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2019-11-20 03:42:48,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 03:42:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2019-11-20 03:42:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 03:42:48,933 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:42:48,933 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:42:49,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:42:49,137 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:42:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:42:49,138 INFO L82 PathProgramCache]: Analyzing trace with hash -781004688, now seen corresponding path program 1 times [2019-11-20 03:42:49,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:42:49,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898744067] [2019-11-20 03:42:49,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:42:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 03:42:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 03:42:49,264 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 03:42:49,264 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 03:42:49,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 03:42:49 BoogieIcfgContainer [2019-11-20 03:42:49,312 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 03:42:49,315 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 03:42:49,315 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 03:42:49,315 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 03:42:49,316 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:42:47" (3/4) ... [2019-11-20 03:42:49,318 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 03:42:49,375 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_93ff32b5-e255-4787-9b92-09ffdc721424/bin/uautomizer/witness.graphml [2019-11-20 03:42:49,375 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 03:42:49,378 INFO L168 Benchmark]: Toolchain (without parser) took 2586.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.0 MB). Free memory was 950.1 MB in the beginning and 1.0 GB in the end (delta: -80.1 MB). Peak memory consumption was 80.9 MB. Max. memory is 11.5 GB. [2019-11-20 03:42:49,378 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:42:49,379 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.0 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -204.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-20 03:42:49,380 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.65 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:42:49,380 INFO L168 Benchmark]: Boogie Preprocessor took 16.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. [2019-11-20 03:42:49,381 INFO L168 Benchmark]: RCFGBuilder took 393.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-11-20 03:42:49,382 INFO L168 Benchmark]: TraceAbstraction took 1798.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 100.7 MB). Peak memory consumption was 100.7 MB. Max. memory is 11.5 GB. [2019-11-20 03:42:49,382 INFO L168 Benchmark]: Witness Printer took 60.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:42:49,386 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 272.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.0 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -204.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.65 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. * RCFGBuilder took 393.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1798.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 100.7 MB). Peak memory consumption was 100.7 MB. Max. memory is 11.5 GB. * Witness Printer took 60.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 43]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L26] int m = __VERIFIER_nondet_int(); [L27] COND FALSE !(m < 0 || m > 3) [L32] int n = __VERIFIER_nondet_int(); [L33] COND FALSE !(n < 0 || n > 23) [L39] CALL, EXPR ackermann(m,n) VAL [\old(m)=2, \old(n)=0] [L15] COND FALSE !(m==0) VAL [\old(m)=2, \old(n)=0, m=2, n=0] [L18] COND TRUE n==0 VAL [\old(m)=2, \old(n)=0, m=2, n=0] [L19] CALL, EXPR ackermann(m-1,1) VAL [\old(m)=1, \old(n)=1] [L15] COND FALSE !(m==0) VAL [\old(m)=1, \old(n)=1, m=1, n=1] [L18] COND FALSE !(n==0) VAL [\old(m)=1, \old(n)=1, m=1, n=1] [L21] CALL, EXPR ackermann(m,n-1) VAL [\old(m)=1, \old(n)=0] [L15] COND FALSE !(m==0) VAL [\old(m)=1, \old(n)=0, m=1, n=0] [L18] COND TRUE n==0 VAL [\old(m)=1, \old(n)=0, m=1, n=0] [L19] CALL, EXPR ackermann(m-1,1) VAL [\old(m)=0, \old(n)=1] [L15] COND TRUE m==0 [L16] return n+1; VAL [\old(m)=0, \old(n)=1, \result=2, m=0, n=1] [L19] RET, EXPR ackermann(m-1,1) VAL [\old(m)=1, \old(n)=0, ackermann(m-1,1)=2, m=1, n=0] [L19] return ackermann(m-1,1); [L21] RET, EXPR ackermann(m,n-1) VAL [\old(m)=1, \old(n)=1, ackermann(m,n-1)=2, m=1, n=1] [L21] CALL, EXPR ackermann(m-1,ackermann(m,n-1)) VAL [\old(m)=0, \old(n)=2] [L15] COND TRUE m==0 [L16] return n+1; VAL [\old(m)=0, \old(n)=2, \result=3, m=0, n=2] [L21] RET, EXPR ackermann(m-1,ackermann(m,n-1)) VAL [\old(m)=1, \old(n)=1, ackermann(m,n-1)=2, ackermann(m-1,ackermann(m,n-1))=3, m=1, n=1] [L21] return ackermann(m-1,ackermann(m,n-1)); [L19] RET, EXPR ackermann(m-1,1) VAL [\old(m)=2, \old(n)=0, ackermann(m-1,1)=3, m=2, n=0] [L19] return ackermann(m-1,1); [L39] RET, EXPR ackermann(m,n) [L39] int result = ackermann(m,n); [L40] COND FALSE !(m < 2 || result >= 4) [L43] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.7s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 62 SDtfs, 58 SDslu, 108 SDs, 0 SdLazy, 130 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=3, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 135 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 3254 SizeOfPredicates, 4 NumberOfNonLiveVariables, 136 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 32/38 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...