./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/jm2006_variant_true-unreach-call_true-termination.c.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/jm2006_variant_true-unreach-call_true-termination.c.i -s /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b2483ed4878f440f5477fb40e4fe96958613e0f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 05:01:07,442 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 05:01:07,443 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 05:01:07,453 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 05:01:07,453 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 05:01:07,454 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 05:01:07,455 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 05:01:07,456 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 05:01:07,457 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 05:01:07,458 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 05:01:07,458 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 05:01:07,459 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 05:01:07,459 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 05:01:07,460 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 05:01:07,461 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 05:01:07,461 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 05:01:07,461 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 05:01:07,463 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 05:01:07,464 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 05:01:07,465 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 05:01:07,466 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 05:01:07,467 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 05:01:07,469 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 05:01:07,469 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 05:01:07,469 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 05:01:07,470 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 05:01:07,470 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 05:01:07,471 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 05:01:07,472 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 05:01:07,472 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 05:01:07,473 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 05:01:07,473 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 05:01:07,473 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 05:01:07,474 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 05:01:07,474 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 05:01:07,475 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 05:01:07,475 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-23 05:01:07,487 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 05:01:07,487 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 05:01:07,488 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 05:01:07,488 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 05:01:07,488 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 05:01:07,488 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 05:01:07,488 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 05:01:07,488 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 05:01:07,488 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 05:01:07,489 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 05:01:07,489 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 05:01:07,489 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 05:01:07,489 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 05:01:07,490 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 05:01:07,490 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 05:01:07,490 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 05:01:07,490 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 05:01:07,490 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 05:01:07,490 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 05:01:07,490 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 05:01:07,491 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 05:01:07,491 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 05:01:07,491 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 05:01:07,491 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 05:01:07,491 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 05:01:07,491 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 05:01:07,491 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 05:01:07,492 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 05:01:07,492 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 05:01:07,492 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 05:01:07,492 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 05:01:07,492 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 05:01:07,492 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 05:01:07,492 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 05:01:07,493 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 05:01:07,493 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 05:01:07,493 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 05:01:07,493 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan 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 -> Taipan 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 -> 6b2483ed4878f440f5477fb40e4fe96958613e0f [2018-11-23 05:01:07,519 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 05:01:07,529 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 05:01:07,532 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 05:01:07,534 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 05:01:07,534 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 05:01:07,535 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan/../../sv-benchmarks/c/loop-lit/jm2006_variant_true-unreach-call_true-termination.c.i [2018-11-23 05:01:07,586 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan/data/c770f0fc4/264ebc2f9fc6494595002de731498702/FLAGc7f4cebfb [2018-11-23 05:01:07,920 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 05:01:07,920 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/sv-benchmarks/c/loop-lit/jm2006_variant_true-unreach-call_true-termination.c.i [2018-11-23 05:01:07,926 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan/data/c770f0fc4/264ebc2f9fc6494595002de731498702/FLAGc7f4cebfb [2018-11-23 05:01:07,936 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan/data/c770f0fc4/264ebc2f9fc6494595002de731498702 [2018-11-23 05:01:07,938 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 05:01:07,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 05:01:07,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 05:01:07,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 05:01:07,943 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 05:01:07,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:01:07" (1/1) ... [2018-11-23 05:01:07,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ef1641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:07, skipping insertion in model container [2018-11-23 05:01:07,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:01:07" (1/1) ... [2018-11-23 05:01:07,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 05:01:07,974 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 05:01:08,086 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 05:01:08,089 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 05:01:08,099 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 05:01:08,108 INFO L195 MainTranslator]: Completed translation [2018-11-23 05:01:08,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:08 WrapperNode [2018-11-23 05:01:08,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 05:01:08,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 05:01:08,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 05:01:08,110 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 05:01:08,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:08" (1/1) ... [2018-11-23 05:01:08,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:08" (1/1) ... [2018-11-23 05:01:08,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 05:01:08,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 05:01:08,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 05:01:08,123 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 05:01:08,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:08" (1/1) ... [2018-11-23 05:01:08,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:08" (1/1) ... [2018-11-23 05:01:08,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:08" (1/1) ... [2018-11-23 05:01:08,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:08" (1/1) ... [2018-11-23 05:01:08,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:08" (1/1) ... [2018-11-23 05:01:08,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:08" (1/1) ... [2018-11-23 05:01:08,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:08" (1/1) ... [2018-11-23 05:01:08,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 05:01:08,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 05:01:08,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 05:01:08,177 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 05:01:08,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 05:01:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 05:01:08,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 05:01:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 05:01:08,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 05:01:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 05:01:08,214 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 05:01:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-23 05:01:08,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-23 05:01:08,315 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 05:01:08,315 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-11-23 05:01:08,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:01:08 BoogieIcfgContainer [2018-11-23 05:01:08,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 05:01:08,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 05:01:08,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 05:01:08,319 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 05:01:08,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:01:07" (1/3) ... [2018-11-23 05:01:08,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4228488a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:01:08, skipping insertion in model container [2018-11-23 05:01:08,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:01:08" (2/3) ... [2018-11-23 05:01:08,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4228488a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:01:08, skipping insertion in model container [2018-11-23 05:01:08,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:01:08" (3/3) ... [2018-11-23 05:01:08,322 INFO L112 eAbstractionObserver]: Analyzing ICFG jm2006_variant_true-unreach-call_true-termination.c.i [2018-11-23 05:01:08,331 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 05:01:08,337 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 05:01:08,351 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 05:01:08,371 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 05:01:08,372 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 05:01:08,372 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 05:01:08,372 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 05:01:08,372 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 05:01:08,372 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 05:01:08,372 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 05:01:08,372 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 05:01:08,383 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-11-23 05:01:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 05:01:08,387 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:01:08,387 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:01:08,388 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:01:08,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:01:08,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1772153714, now seen corresponding path program 1 times [2018-11-23 05:01:08,393 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 05:01:08,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:01:08,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:01:08,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:01:08,430 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 05:01:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:01:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:01:08,720 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 05:01:08,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-23 05:01:08,720 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 05:01:08,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 05:01:08,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 05:01:08,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 05:01:08,738 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2018-11-23 05:01:08,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:01:08,971 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2018-11-23 05:01:08,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 05:01:08,975 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-11-23 05:01:08,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:01:08,983 INFO L225 Difference]: With dead ends: 47 [2018-11-23 05:01:08,983 INFO L226 Difference]: Without dead ends: 15 [2018-11-23 05:01:08,987 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-23 05:01:09,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-23 05:01:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-23 05:01:09,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-23 05:01:09,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-23 05:01:09,015 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-11-23 05:01:09,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:01:09,016 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-23 05:01:09,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 05:01:09,016 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-23 05:01:09,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-23 05:01:09,017 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:01:09,017 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:01:09,017 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:01:09,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:01:09,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1871056931, now seen corresponding path program 1 times [2018-11-23 05:01:09,018 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 05:01:09,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:01:09,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:01:09,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:01:09,019 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 05:01:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:01:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:01:09,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:01:09,134 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 05:01:09,135 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-11-23 05:01:09,136 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [19], [21], [27], [34], [37], [39], [45], [46], [47], [49] [2018-11-23 05:01:09,165 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 05:01:09,165 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 05:01:09,301 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 05:01:09,302 INFO L272 AbstractInterpreter]: Visited 14 different actions 35 times. Merged at 3 different actions 9 times. Widened at 1 different actions 1 times. Performed 124 root evaluator evaluations with a maximum evaluation depth of 5. Performed 124 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 9 variables. [2018-11-23 05:01:09,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:01:09,309 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 05:01:09,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:01:09,309 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:01:09,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:01:09,323 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 05:01:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:01:09,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:01:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:01:09,452 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 05:01:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:01:09,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 05:01:09,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2018-11-23 05:01:09,608 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 05:01:09,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 05:01:09,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 05:01:09,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2018-11-23 05:01:09,610 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2018-11-23 05:01:09,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:01:09,703 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-23 05:01:09,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 05:01:09,704 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-11-23 05:01:09,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:01:09,704 INFO L225 Difference]: With dead ends: 22 [2018-11-23 05:01:09,704 INFO L226 Difference]: Without dead ends: 16 [2018-11-23 05:01:09,705 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2018-11-23 05:01:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-23 05:01:09,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-23 05:01:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-23 05:01:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-11-23 05:01:09,709 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-11-23 05:01:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:01:09,709 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-11-23 05:01:09,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 05:01:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-11-23 05:01:09,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-23 05:01:09,710 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:01:09,710 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:01:09,710 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:01:09,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:01:09,711 INFO L82 PathProgramCache]: Analyzing trace with hash -642089362, now seen corresponding path program 2 times [2018-11-23 05:01:09,711 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 05:01:09,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:01:09,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 05:01:09,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:01:09,713 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 05:01:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:01:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:01:09,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:01:09,847 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 05:01:09,847 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 05:01:09,847 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 05:01:09,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:01:09,847 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:01:09,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 05:01:09,854 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 05:01:09,863 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-23 05:01:09,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 05:01:09,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:01:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:01:09,928 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 05:01:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:01:10,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 05:01:10,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2018-11-23 05:01:10,040 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 05:01:10,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-23 05:01:10,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 05:01:10,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2018-11-23 05:01:10,041 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 14 states. [2018-11-23 05:01:10,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:01:10,141 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-11-23 05:01:10,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 05:01:10,142 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2018-11-23 05:01:10,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:01:10,143 INFO L225 Difference]: With dead ends: 26 [2018-11-23 05:01:10,143 INFO L226 Difference]: Without dead ends: 18 [2018-11-23 05:01:10,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2018-11-23 05:01:10,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-23 05:01:10,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-23 05:01:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-23 05:01:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-23 05:01:10,148 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-11-23 05:01:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:01:10,148 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-23 05:01:10,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-23 05:01:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-23 05:01:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-23 05:01:10,149 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 05:01:10,149 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 05:01:10,149 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 05:01:10,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 05:01:10,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1276972978, now seen corresponding path program 3 times [2018-11-23 05:01:10,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 05:01:10,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:01:10,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 05:01:10,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 05:01:10,150 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 05:01:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 05:01:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 05:01:10,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:01:10,255 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 05:01:10,255 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 05:01:10,255 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 05:01:10,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 05:01:10,255 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 05:01:10,261 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 05:01:10,261 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 05:01:10,268 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 05:01:10,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 05:01:10,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 05:01:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:01:10,390 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 05:01:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 05:01:10,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 05:01:10,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2018-11-23 05:01:10,557 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 05:01:10,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-23 05:01:10,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-23 05:01:10,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2018-11-23 05:01:10,558 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-11-23 05:01:10,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 05:01:10,659 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-11-23 05:01:10,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 05:01:10,660 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-11-23 05:01:10,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 05:01:10,660 INFO L225 Difference]: With dead ends: 21 [2018-11-23 05:01:10,660 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 05:01:10,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2018-11-23 05:01:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 05:01:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 05:01:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 05:01:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 05:01:10,661 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-11-23 05:01:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 05:01:10,661 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 05:01:10,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-23 05:01:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 05:01:10,662 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 05:01:10,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 05:01:10,730 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 05:01:10,730 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 05:01:10,730 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 05:01:10,730 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 05:01:10,730 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 05:01:10,730 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 05:01:10,730 INFO L444 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 main_~z~0))) (and (<= .cse0 0) (<= 0 .cse0))) [2018-11-23 05:01:10,730 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 28) no Hoare annotation was computed. [2018-11-23 05:01:10,730 INFO L444 ceAbstractionStarter]: At program point L19-2(lines 19 23) the Hoare annotation is: (let ((.cse1 (+ main_~x~0 main_~j~0)) (.cse0 (+ main_~y~0 main_~i~0 main_~z~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2018-11-23 05:01:10,730 INFO L448 ceAbstractionStarter]: For program point L19-3(lines 10 28) no Hoare annotation was computed. [2018-11-23 05:01:10,730 INFO L448 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-11-23 05:01:10,731 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 28) no Hoare annotation was computed. [2018-11-23 05:01:10,731 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 28) the Hoare annotation is: true [2018-11-23 05:01:10,731 INFO L448 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2018-11-23 05:01:10,731 INFO L448 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-11-23 05:01:10,731 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-23 05:01:10,731 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-23 05:01:10,731 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-23 05:01:10,731 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-23 05:01:10,731 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-23 05:01:10,731 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-23 05:01:10,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 05:01:10 BoogieIcfgContainer [2018-11-23 05:01:10,739 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 05:01:10,739 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 05:01:10,739 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 05:01:10,740 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 05:01:10,740 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:01:08" (3/4) ... [2018-11-23 05:01:10,743 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 05:01:10,748 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 05:01:10,749 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 05:01:10,749 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-23 05:01:10,752 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-11-23 05:01:10,752 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-11-23 05:01:10,752 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 05:01:10,784 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_fc565516-63a7-4ba9-b57b-c157258f0cb2/bin-2019/utaipan/witness.graphml [2018-11-23 05:01:10,784 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 05:01:10,785 INFO L168 Benchmark]: Toolchain (without parser) took 2846.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 215.5 MB). Free memory was 959.1 MB in the beginning and 1.2 GB in the end (delta: -202.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. [2018-11-23 05:01:10,786 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 05:01:10,786 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.50 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 05:01:10,786 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.85 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 05:01:10,787 INFO L168 Benchmark]: Boogie Preprocessor took 53.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -195.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 11.5 GB. [2018-11-23 05:01:10,787 INFO L168 Benchmark]: RCFGBuilder took 138.72 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 11.5 GB. [2018-11-23 05:01:10,787 INFO L168 Benchmark]: TraceAbstraction took 2422.98 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -33.9 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. [2018-11-23 05:01:10,788 INFO L168 Benchmark]: Witness Printer took 45.22 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: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 11.5 GB. [2018-11-23 05:01:10,789 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 169.50 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.85 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 53.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 948.4 MB in the beginning and 1.1 GB in the end (delta: -195.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 138.72 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2422.98 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -33.9 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. * Witness Printer took 45.22 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: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: y + i + z <= x + j && x + j <= y + i + z - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 2.3s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 51 SDtfs, 38 SDslu, 299 SDs, 0 SdLazy, 305 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 141 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 24 NumberOfFragments, 33 HoareAnnotationTreeSize, 13 FomulaSimplifications, 55 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 192 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 105 NumberOfCodeBlocks, 103 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 141 ConstructedInterpolants, 0 QuantifiedInterpolants, 14323 SizeOfPredicates, 21 NumberOfNonLiveVariables, 159 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 1/42 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...