./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_b2_o3.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_84fa856f-db9a-47b2-b6d3-61eab71a2721/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b2_o3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/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 128b2219e8f86913777da69c49be5957c6dd8c80 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 02:56:47,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 02:56:47,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 02:56:47,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 02:56:47,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 02:56:47,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 02:56:47,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 02:56:47,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 02:56:47,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 02:56:47,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 02:56:47,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 02:56:47,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 02:56:47,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 02:56:47,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 02:56:47,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 02:56:47,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 02:56:47,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 02:56:47,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 02:56:47,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 02:56:47,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 02:56:47,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 02:56:47,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 02:56:47,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 02:56:47,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 02:56:47,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 02:56:47,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 02:56:47,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 02:56:47,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 02:56:47,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 02:56:47,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 02:56:47,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 02:56:47,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 02:56:47,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 02:56:47,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 02:56:47,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 02:56:47,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 02:56:47,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 02:56:47,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 02:56:47,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 02:56:47,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 02:56:47,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 02:56:47,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 02:56:47,934 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 02:56:47,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 02:56:47,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 02:56:47,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 02:56:47,935 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 02:56:47,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 02:56:47,936 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 02:56:47,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 02:56:47,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 02:56:47,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 02:56:47,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 02:56:47,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 02:56:47,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 02:56:47,937 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 02:56:47,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 02:56:47,937 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 02:56:47,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 02:56:47,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 02:56:47,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 02:56:47,938 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 02:56:47,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 02:56:47,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 02:56:47,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 02:56:47,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 02:56:47,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 02:56:47,939 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 02:56:47,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 02:56:47,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 02:56:47,940 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_84fa856f-db9a-47b2-b6d3-61eab71a2721/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 -> 128b2219e8f86913777da69c49be5957c6dd8c80 [2019-11-20 02:56:48,097 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 02:56:48,108 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 02:56:48,111 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 02:56:48,113 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 02:56:48,113 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 02:56:48,114 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_b2_o3.c [2019-11-20 02:56:48,168 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/bin/uautomizer/data/872198079/f5d826517eb34876b916ed820b1f97c7/FLAG2d8f4bd92 [2019-11-20 02:56:48,512 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 02:56:48,512 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/sv-benchmarks/c/recursive-simple/id_b2_o3.c [2019-11-20 02:56:48,516 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/bin/uautomizer/data/872198079/f5d826517eb34876b916ed820b1f97c7/FLAG2d8f4bd92 [2019-11-20 02:56:48,919 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/bin/uautomizer/data/872198079/f5d826517eb34876b916ed820b1f97c7 [2019-11-20 02:56:48,921 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 02:56:48,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 02:56:48,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 02:56:48,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 02:56:48,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 02:56:48,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:56:48" (1/1) ... [2019-11-20 02:56:48,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@238385a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:48, skipping insertion in model container [2019-11-20 02:56:48,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:56:48" (1/1) ... [2019-11-20 02:56:48,947 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 02:56:48,963 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 02:56:49,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:56:49,155 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 02:56:49,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:56:49,266 INFO L192 MainTranslator]: Completed translation [2019-11-20 02:56:49,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:49 WrapperNode [2019-11-20 02:56:49,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 02:56:49,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 02:56:49,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 02:56:49,268 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 02:56:49,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:49" (1/1) ... [2019-11-20 02:56:49,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:49" (1/1) ... [2019-11-20 02:56:49,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 02:56:49,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 02:56:49,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 02:56:49,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 02:56:49,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:49" (1/1) ... [2019-11-20 02:56:49,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:49" (1/1) ... [2019-11-20 02:56:49,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:49" (1/1) ... [2019-11-20 02:56:49,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:49" (1/1) ... [2019-11-20 02:56:49,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:49" (1/1) ... [2019-11-20 02:56:49,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:49" (1/1) ... [2019-11-20 02:56:49,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:49" (1/1) ... [2019-11-20 02:56:49,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 02:56:49,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 02:56:49,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 02:56:49,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 02:56:49,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/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 02:56:49,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 02:56:49,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 02:56:49,356 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-20 02:56:49,356 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-20 02:56:49,478 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 02:56:49,478 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 02:56:49,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:56:49 BoogieIcfgContainer [2019-11-20 02:56:49,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 02:56:49,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 02:56:49,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 02:56:49,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 02:56:49,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 02:56:48" (1/3) ... [2019-11-20 02:56:49,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fc77c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:56:49, skipping insertion in model container [2019-11-20 02:56:49,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:49" (2/3) ... [2019-11-20 02:56:49,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fc77c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:56:49, skipping insertion in model container [2019-11-20 02:56:49,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:56:49" (3/3) ... [2019-11-20 02:56:49,485 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2019-11-20 02:56:49,493 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 02:56:49,499 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 02:56:49,510 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 02:56:49,531 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 02:56:49,531 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 02:56:49,532 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 02:56:49,532 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 02:56:49,532 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 02:56:49,532 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 02:56:49,532 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 02:56:49,533 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 02:56:49,552 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-20 02:56:49,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 02:56:49,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:56:49,560 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:56:49,560 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:56:49,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:56:49,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1224902363, now seen corresponding path program 1 times [2019-11-20 02:56:49,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:56:49,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646512608] [2019-11-20 02:56:49,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:56:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:49,915 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 02:56:49,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646512608] [2019-11-20 02:56:49,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:56:49,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 02:56:49,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926507057] [2019-11-20 02:56:49,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 02:56:49,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:56:49,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 02:56:49,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 02:56:49,937 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2019-11-20 02:56:49,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:56:49,984 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2019-11-20 02:56:49,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 02:56:49,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-20 02:56:49,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:56:49,994 INFO L225 Difference]: With dead ends: 28 [2019-11-20 02:56:49,995 INFO L226 Difference]: Without dead ends: 15 [2019-11-20 02:56:49,997 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 02:56:50,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-20 02:56:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-20 02:56:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-20 02:56:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-20 02:56:50,028 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2019-11-20 02:56:50,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:56:50,029 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-20 02:56:50,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 02:56:50,029 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-20 02:56:50,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 02:56:50,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:56:50,031 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:56:50,031 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:56:50,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:56:50,031 INFO L82 PathProgramCache]: Analyzing trace with hash 510739163, now seen corresponding path program 1 times [2019-11-20 02:56:50,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:56:50,032 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865608018] [2019-11-20 02:56:50,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:56:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 02:56:50,169 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865608018] [2019-11-20 02:56:50,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:56:50,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 02:56:50,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551602712] [2019-11-20 02:56:50,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 02:56:50,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:56:50,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 02:56:50,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 02:56:50,172 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2019-11-20 02:56:50,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:56:50,192 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-11-20 02:56:50,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 02:56:50,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-20 02:56:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:56:50,194 INFO L225 Difference]: With dead ends: 21 [2019-11-20 02:56:50,194 INFO L226 Difference]: Without dead ends: 17 [2019-11-20 02:56:50,195 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 02:56:50,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-20 02:56:50,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2019-11-20 02:56:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-20 02:56:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-20 02:56:50,201 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 16 [2019-11-20 02:56:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:56:50,201 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-20 02:56:50,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 02:56:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-20 02:56:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 02:56:50,202 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:56:50,203 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:56:50,203 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:56:50,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:56:50,203 INFO L82 PathProgramCache]: Analyzing trace with hash 539368314, now seen corresponding path program 1 times [2019-11-20 02:56:50,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:56:50,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109279881] [2019-11-20 02:56:50,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:56:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:50,386 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 02:56:50,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109279881] [2019-11-20 02:56:50,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134628262] [2019-11-20 02:56:50,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/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 02:56:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:50,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 02:56:50,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:56:50,521 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 02:56:50,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:56:50,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-20 02:56:50,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104479142] [2019-11-20 02:56:50,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 02:56:50,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:56:50,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 02:56:50,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-20 02:56:50,523 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 9 states. [2019-11-20 02:56:50,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:56:50,609 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2019-11-20 02:56:50,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 02:56:50,611 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-20 02:56:50,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:56:50,612 INFO L225 Difference]: With dead ends: 33 [2019-11-20 02:56:50,612 INFO L226 Difference]: Without dead ends: 21 [2019-11-20 02:56:50,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-20 02:56:50,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-20 02:56:50,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-11-20 02:56:50,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-20 02:56:50,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-20 02:56:50,620 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2019-11-20 02:56:50,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:56:50,620 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-20 02:56:50,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 02:56:50,621 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-20 02:56:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 02:56:50,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:56:50,624 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:56:50,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:56:50,827 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:56:50,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:56:50,827 INFO L82 PathProgramCache]: Analyzing trace with hash -719196619, now seen corresponding path program 2 times [2019-11-20 02:56:50,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:56:50,828 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770804988] [2019-11-20 02:56:50,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:56:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 02:56:51,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770804988] [2019-11-20 02:56:51,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680641943] [2019-11-20 02:56:51,091 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/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 02:56:51,128 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 02:56:51,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:56:51,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 02:56:51,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:56:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 02:56:51,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:56:51,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-20 02:56:51,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978781535] [2019-11-20 02:56:51,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 02:56:51,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:56:51,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 02:56:51,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-20 02:56:51,197 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 12 states. [2019-11-20 02:56:51,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:56:51,312 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-11-20 02:56:51,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 02:56:51,315 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-20 02:56:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:56:51,317 INFO L225 Difference]: With dead ends: 37 [2019-11-20 02:56:51,317 INFO L226 Difference]: Without dead ends: 25 [2019-11-20 02:56:51,318 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-11-20 02:56:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-20 02:56:51,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-11-20 02:56:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 02:56:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-20 02:56:51,323 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 23 [2019-11-20 02:56:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:56:51,323 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-20 02:56:51,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 02:56:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-20 02:56:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 02:56:51,325 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:56:51,325 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:56:51,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:56:51,526 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:56:51,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:56:51,526 INFO L82 PathProgramCache]: Analyzing trace with hash -895116854, now seen corresponding path program 3 times [2019-11-20 02:56:51,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:56:51,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737326594] [2019-11-20 02:56:51,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:56:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 02:56:51,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737326594] [2019-11-20 02:56:51,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493267419] [2019-11-20 02:56:51,748 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/bin/uautomizer/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 [2019-11-20 02:56:51,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-20 02:56:51,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:56:51,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 02:56:51,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:56:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-20 02:56:51,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 02:56:51,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2019-11-20 02:56:51,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120238914] [2019-11-20 02:56:51,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 02:56:51,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:56:51,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 02:56:51,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2019-11-20 02:56:51,863 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2019-11-20 02:56:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:56:51,876 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-11-20 02:56:51,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 02:56:51,877 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-11-20 02:56:51,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:56:51,878 INFO L225 Difference]: With dead ends: 23 [2019-11-20 02:56:51,878 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 02:56:51,879 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2019-11-20 02:56:51,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 02:56:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 02:56:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 02:56:51,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 02:56:51,880 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2019-11-20 02:56:51,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:56:51,880 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:56:51,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 02:56:51,880 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 02:56:51,880 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 02:56:52,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:56:52,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 02:56:52,120 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 02:56:52,120 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 02:56:52,120 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 02:56:52,121 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2019-11-20 02:56:52,121 INFO L444 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2019-11-20 02:56:52,121 INFO L444 ceAbstractionStarter]: For program point L14(lines 14 16) no Hoare annotation was computed. [2019-11-20 02:56:52,121 INFO L447 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: true [2019-11-20 02:56:52,121 INFO L444 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-11-20 02:56:52,122 INFO L444 ceAbstractionStarter]: For program point L11(lines 11 17) no Hoare annotation was computed. [2019-11-20 02:56:52,122 INFO L444 ceAbstractionStarter]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2019-11-20 02:56:52,122 INFO L444 ceAbstractionStarter]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2019-11-20 02:56:52,122 INFO L447 ceAbstractionStarter]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2019-11-20 02:56:52,122 INFO L444 ceAbstractionStarter]: For program point L7(line 7) no Hoare annotation was computed. [2019-11-20 02:56:52,123 INFO L447 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: true [2019-11-20 02:56:52,123 INFO L444 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-20 02:56:52,123 INFO L444 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-11-20 02:56:52,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 02:56:52 BoogieIcfgContainer [2019-11-20 02:56:52,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 02:56:52,136 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 02:56:52,136 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 02:56:52,137 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 02:56:52,137 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:56:49" (3/4) ... [2019-11-20 02:56:52,140 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 02:56:52,148 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-11-20 02:56:52,154 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-20 02:56:52,154 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 02:56:52,202 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_84fa856f-db9a-47b2-b6d3-61eab71a2721/bin/uautomizer/witness.graphml [2019-11-20 02:56:52,202 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 02:56:52,204 INFO L168 Benchmark]: Toolchain (without parser) took 3281.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 944.7 MB in the beginning and 899.6 MB in the end (delta: 45.1 MB). Peak memory consumption was 142.1 MB. Max. memory is 11.5 GB. [2019-11-20 02:56:52,205 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:56:52,206 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -149.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-20 02:56:52,206 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.90 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:56:52,207 INFO L168 Benchmark]: Boogie Preprocessor took 13.40 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:56:52,207 INFO L168 Benchmark]: RCFGBuilder took 173.07 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-20 02:56:52,207 INFO L168 Benchmark]: TraceAbstraction took 2656.17 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 905.0 MB in the end (delta: 169.7 MB). Peak memory consumption was 169.7 MB. Max. memory is 11.5 GB. [2019-11-20 02:56:52,208 INFO L168 Benchmark]: Witness Printer took 66.29 ms. Allocated memory is still 1.1 GB. Free memory was 905.0 MB in the beginning and 899.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 02:56:52,211 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 343.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -149.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.90 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.40 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 173.07 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2656.17 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 905.0 MB in the end (delta: 169.7 MB). Peak memory consumption was 169.7 MB. Max. memory is 11.5 GB. * Witness Printer took 66.29 ms. Allocated memory is still 1.1 GB. Free memory was 905.0 MB in the beginning and 899.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Result: SAFE, OverallTime: 2.5s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 74 SDtfs, 9 SDslu, 306 SDs, 0 SdLazy, 113 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s 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, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 3 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 163 NumberOfCodeBlocks, 149 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 155 ConstructedInterpolants, 0 QuantifiedInterpolants, 11367 SizeOfPredicates, 7 NumberOfNonLiveVariables, 126 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 76/108 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...