./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/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 452a4ddc5d154328a041fd76cdcbb5b63a51957d ........................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:46:08,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:46:08,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:46:08,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:46:08,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:46:08,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:46:08,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:46:08,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:46:08,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:46:08,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:46:08,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:46:08,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:46:08,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:46:08,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:46:08,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:46:08,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:46:08,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:46:08,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:46:08,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:46:08,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:46:08,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:46:08,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:46:08,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:46:08,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:46:08,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:46:08,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:46:08,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:46:08,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:46:08,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:46:08,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:46:08,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:46:08,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:46:08,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:46:08,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:46:08,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:46:08,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:46:08,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:46:08,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:46:08,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:46:08,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:46:08,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:46:08,493 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:46:08,517 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:46:08,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:46:08,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:46:08,518 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:46:08,518 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:46:08,518 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:46:08,518 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:46:08,518 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:46:08,519 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:46:08,519 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:46:08,519 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:46:08,519 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:46:08,519 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:46:08,520 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:46:08,520 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:46:08,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:46:08,520 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:46:08,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:46:08,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:46:08,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:46:08,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:46:08,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:46:08,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:46:08,522 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:46:08,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:46:08,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:46:08,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:46:08,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:46:08,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:46:08,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:46:08,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:46:08,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:46:08,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:46:08,524 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:46:08,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:46:08,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:46:08,524 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:46:08,534 INFO L138 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/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/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 -> 452a4ddc5d154328a041fd76cdcbb5b63a51957d [2019-11-26 02:46:08,705 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:46:08,718 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:46:08,721 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:46:08,723 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:46:08,723 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:46:08,724 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/utaipan/../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2019-11-26 02:46:08,784 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/utaipan/data/151992eff/4e1ce2f2236b4a37850c5123b59c10ec/FLAGa6c772adb [2019-11-26 02:46:09,172 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:46:09,172 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2019-11-26 02:46:09,177 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/utaipan/data/151992eff/4e1ce2f2236b4a37850c5123b59c10ec/FLAGa6c772adb [2019-11-26 02:46:09,189 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/utaipan/data/151992eff/4e1ce2f2236b4a37850c5123b59c10ec [2019-11-26 02:46:09,191 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:46:09,193 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:46:09,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:46:09,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:46:09,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:46:09,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:46:09" (1/1) ... [2019-11-26 02:46:09,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f44a59d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:09, skipping insertion in model container [2019-11-26 02:46:09,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:46:09" (1/1) ... [2019-11-26 02:46:09,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:46:09,220 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:46:09,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:46:09,380 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:46:09,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:46:09,464 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:46:09,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:09 WrapperNode [2019-11-26 02:46:09,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:46:09,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:46:09,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:46:09,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:46:09,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:09" (1/1) ... [2019-11-26 02:46:09,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:09" (1/1) ... [2019-11-26 02:46:09,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:46:09,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:46:09,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:46:09,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:46:09,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:09" (1/1) ... [2019-11-26 02:46:09,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:09" (1/1) ... [2019-11-26 02:46:09,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:09" (1/1) ... [2019-11-26 02:46:09,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:09" (1/1) ... [2019-11-26 02:46:09,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:09" (1/1) ... [2019-11-26 02:46:09,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:09" (1/1) ... [2019-11-26 02:46:09,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:09" (1/1) ... [2019-11-26 02:46:09,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:46:09,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:46:09,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:46:09,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:46:09,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/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 [2019-11-26 02:46:09,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:46:09,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:46:09,793 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:46:09,793 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-26 02:46:09,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:46:09 BoogieIcfgContainer [2019-11-26 02:46:09,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:46:09,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:46:09,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:46:09,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:46:09,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:46:09" (1/3) ... [2019-11-26 02:46:09,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38358fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:46:09, skipping insertion in model container [2019-11-26 02:46:09,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:46:09" (2/3) ... [2019-11-26 02:46:09,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38358fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:46:09, skipping insertion in model container [2019-11-26 02:46:09,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:46:09" (3/3) ... [2019-11-26 02:46:09,804 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2019-11-26 02:46:09,813 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:46:09,822 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:46:09,833 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:46:09,861 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:46:09,862 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:46:09,862 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:46:09,862 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:46:09,862 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:46:09,862 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:46:09,862 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:46:09,862 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:46:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-11-26 02:46:09,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 02:46:09,880 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:46:09,881 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 02:46:09,881 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:46:09,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:46:09,886 INFO L82 PathProgramCache]: Analyzing trace with hash 982688, now seen corresponding path program 1 times [2019-11-26 02:46:09,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:46:09,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60969039] [2019-11-26 02:46:09,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:46:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:46:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:46:10,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60969039] [2019-11-26 02:46:10,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:46:10,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:46:10,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266753840] [2019-11-26 02:46:10,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:46:10,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:46:10,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:46:10,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:46:10,133 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2019-11-26 02:46:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:46:10,169 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2019-11-26 02:46:10,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:46:10,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-26 02:46:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:46:10,178 INFO L225 Difference]: With dead ends: 13 [2019-11-26 02:46:10,179 INFO L226 Difference]: Without dead ends: 6 [2019-11-26 02:46:10,181 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:46:10,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-11-26 02:46:10,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-11-26 02:46:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-26 02:46:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-11-26 02:46:10,236 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-11-26 02:46:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:46:10,237 INFO L462 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-11-26 02:46:10,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:46:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-11-26 02:46:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-26 02:46:10,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:46:10,238 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-26 02:46:10,238 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:46:10,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:46:10,239 INFO L82 PathProgramCache]: Analyzing trace with hash 29879958, now seen corresponding path program 1 times [2019-11-26 02:46:10,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:46:10,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741184929] [2019-11-26 02:46:10,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:46:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:46:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:46:10,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741184929] [2019-11-26 02:46:10,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167078128] [2019-11-26 02:46:10,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/utaipan/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 [2019-11-26 02:46:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:46:10,365 WARN L253 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-26 02:46:10,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:46:10,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:46:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:46:10,425 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:46:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:46:10,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1694580220] [2019-11-26 02:46:10,508 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-26 02:46:10,508 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:46:10,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:46:10,533 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:46:10,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:46:10,675 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:46:10,771 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:46:10,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:46:10,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2019-11-26 02:46:10,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293572419] [2019-11-26 02:46:10,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:46:10,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:46:10,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:46:10,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:46:10,774 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 8 states. [2019-11-26 02:46:10,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:46:10,861 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2019-11-26 02:46:10,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:46:10,861 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-11-26 02:46:10,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:46:10,862 INFO L225 Difference]: With dead ends: 13 [2019-11-26 02:46:10,862 INFO L226 Difference]: Without dead ends: 9 [2019-11-26 02:46:10,865 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-26 02:46:10,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-26 02:46:10,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-26 02:46:10,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-26 02:46:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-26 02:46:10,868 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2019-11-26 02:46:10,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:46:10,868 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-26 02:46:10,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:46:10,868 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-26 02:46:10,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:46:10,869 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:46:10,869 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2019-11-26 02:46:11,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:46:11,074 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:46:11,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:46:11,075 INFO L82 PathProgramCache]: Analyzing trace with hash 516312096, now seen corresponding path program 2 times [2019-11-26 02:46:11,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:46:11,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008377598] [2019-11-26 02:46:11,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:46:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:46:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:46:11,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008377598] [2019-11-26 02:46:11,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153763168] [2019-11-26 02:46:11,231 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/utaipan/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 [2019-11-26 02:46:11,260 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-26 02:46:11,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:46:11,261 WARN L253 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-26 02:46:11,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:46:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:46:11,299 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:46:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:46:11,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1737054708] [2019-11-26 02:46:11,418 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-11-26 02:46:11,419 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:46:11,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:46:11,419 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:46:11,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:46:11,485 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:46:11,604 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:46:11,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:46:11,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2019-11-26 02:46:11,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882295340] [2019-11-26 02:46:11,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:46:11,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:46:11,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:46:11,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:46:11,607 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 14 states. [2019-11-26 02:46:12,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:46:12,135 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2019-11-26 02:46:12,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-26 02:46:12,135 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 8 [2019-11-26 02:46:12,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:46:12,136 INFO L225 Difference]: With dead ends: 19 [2019-11-26 02:46:12,136 INFO L226 Difference]: Without dead ends: 15 [2019-11-26 02:46:12,137 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2019-11-26 02:46:12,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-26 02:46:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-26 02:46:12,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-26 02:46:12,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-26 02:46:12,141 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2019-11-26 02:46:12,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:46:12,141 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-26 02:46:12,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:46:12,142 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-26 02:46:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:46:12,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:46:12,142 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2019-11-26 02:46:12,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:46:12,345 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:46:12,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:46:12,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2058949920, now seen corresponding path program 3 times [2019-11-26 02:46:12,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:46:12,346 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660138042] [2019-11-26 02:46:12,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:46:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:46:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:46:12,389 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 02:46:12,389 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:46:12,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:46:12 BoogieIcfgContainer [2019-11-26 02:46:12,412 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:46:12,413 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:46:12,413 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:46:12,414 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:46:12,414 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:46:09" (3/4) ... [2019-11-26 02:46:12,416 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:46:12,458 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b8538cf3-8935-45ca-b355-5f6b3e2a0329/bin/utaipan/witness.graphml [2019-11-26 02:46:12,458 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:46:12,460 INFO L168 Benchmark]: Toolchain (without parser) took 3267.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 946.0 MB in the beginning and 973.2 MB in the end (delta: -27.2 MB). Peak memory consumption was 113.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:46:12,461 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:46:12,461 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -193.3 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:46:12,462 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.91 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:46:12,462 INFO L168 Benchmark]: Boogie Preprocessor took 18.66 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:46:12,463 INFO L168 Benchmark]: RCFGBuilder took 278.55 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:46:12,463 INFO L168 Benchmark]: TraceAbstraction took 2616.92 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 975.9 MB in the end (delta: 143.7 MB). Peak memory consumption was 143.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:46:12,464 INFO L168 Benchmark]: Witness Printer took 45.55 ms. Allocated memory is still 1.2 GB. Free memory was 975.9 MB in the beginning and 973.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:46:12,466 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 271.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -193.3 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.91 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.66 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 278.55 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2616.92 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 975.9 MB in the end (delta: 143.7 MB). Peak memory consumption was 143.7 MB. Max. memory is 11.5 GB. * Witness Printer took 45.55 ms. Allocated memory is still 1.2 GB. Free memory was 975.9 MB in the beginning and 973.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND FALSE !(x < 6) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.5s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 27 SDslu, 26 SDs, 0 SdLazy, 85 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1136 SizeOfPredicates, 4 NumberOfNonLiveVariables, 53 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...