./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/lcm2.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_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/lcm2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/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 9d162b857a109cf07f49ff5c5c478da80317c448 ............................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:38:18,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:38:18,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:38:18,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:38:18,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:38:18,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:38:18,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:38:18,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:38:18,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:38:18,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:38:18,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:38:18,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:38:18,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:38:18,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:38:18,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:38:18,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:38:18,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:38:18,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:38:18,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:38:18,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:38:18,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:38:18,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:38:18,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:38:18,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:38:18,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:38:18,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:38:18,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:38:18,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:38:18,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:38:18,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:38:18,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:38:18,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:38:18,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:38:18,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:38:18,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:38:18,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:38:18,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:38:18,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:38:18,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:38:18,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:38:18,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:38:18,580 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:38:18,606 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:38:18,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:38:18,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:38:18,608 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:38:18,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:38:18,609 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:38:18,609 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:38:18,609 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:38:18,609 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:38:18,610 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:38:18,610 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:38:18,611 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:38:18,611 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:38:18,611 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:38:18,611 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:38:18,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:38:18,612 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:38:18,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:38:18,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:38:18,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:38:18,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:38:18,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:38:18,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:38:18,614 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:38:18,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:38:18,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:38:18,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:38:18,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:38:18,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:38:18,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:38:18,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:38:18,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:38:18,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:38:18,616 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:38:18,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:38:18,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:38:18,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:38:18,617 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_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/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 -> 9d162b857a109cf07f49ff5c5c478da80317c448 [2019-11-26 02:38:18,783 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:38:18,798 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:38:18,801 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:38:18,802 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:38:18,803 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:38:18,803 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/bin/utaipan/../../sv-benchmarks/c/nla-digbench/lcm2.c [2019-11-26 02:38:18,862 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/bin/utaipan/data/f778e50f9/b4b75acebb5b48be958d29979a74b98a/FLAG090e85dd3 [2019-11-26 02:38:19,237 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:38:19,238 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/sv-benchmarks/c/nla-digbench/lcm2.c [2019-11-26 02:38:19,243 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/bin/utaipan/data/f778e50f9/b4b75acebb5b48be958d29979a74b98a/FLAG090e85dd3 [2019-11-26 02:38:19,256 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/bin/utaipan/data/f778e50f9/b4b75acebb5b48be958d29979a74b98a [2019-11-26 02:38:19,259 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:38:19,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:38:19,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:38:19,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:38:19,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:38:19,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:38:19" (1/1) ... [2019-11-26 02:38:19,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58d36c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:38:19, skipping insertion in model container [2019-11-26 02:38:19,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:38:19" (1/1) ... [2019-11-26 02:38:19,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:38:19,304 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:38:19,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:38:19,468 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:38:19,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:38:19,562 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:38:19,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:38:19 WrapperNode [2019-11-26 02:38:19,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:38:19,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:38:19,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:38:19,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:38:19,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:38:19" (1/1) ... [2019-11-26 02:38:19,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:38:19" (1/1) ... [2019-11-26 02:38:19,602 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:38:19,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:38:19,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:38:19,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:38:19,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:38:19" (1/1) ... [2019-11-26 02:38:19,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:38:19" (1/1) ... [2019-11-26 02:38:19,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:38:19" (1/1) ... [2019-11-26 02:38:19,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:38:19" (1/1) ... [2019-11-26 02:38:19,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:38:19" (1/1) ... [2019-11-26 02:38:19,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:38:19" (1/1) ... [2019-11-26 02:38:19,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:38:19" (1/1) ... [2019-11-26 02:38:19,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:38:19,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:38:19,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:38:19,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:38:19,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:38:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/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 02:38:19,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:38:19,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:38:19,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2019-11-26 02:38:20,048 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:38:20,048 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-26 02:38:20,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:38:20 BoogieIcfgContainer [2019-11-26 02:38:20,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:38:20,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:38:20,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:38:20,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:38:20,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:38:19" (1/3) ... [2019-11-26 02:38:20,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a795c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:38:20, skipping insertion in model container [2019-11-26 02:38:20,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:38:19" (2/3) ... [2019-11-26 02:38:20,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a795c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:38:20, skipping insertion in model container [2019-11-26 02:38:20,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:38:20" (3/3) ... [2019-11-26 02:38:20,056 INFO L109 eAbstractionObserver]: Analyzing ICFG lcm2.c [2019-11-26 02:38:20,064 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:38:20,071 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-26 02:38:20,081 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-26 02:38:20,100 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:38:20,100 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:38:20,100 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:38:20,101 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:38:20,101 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:38:20,101 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:38:20,101 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:38:20,102 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:38:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-26 02:38:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 02:38:20,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:38:20,120 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 02:38:20,121 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:38:20,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:38:20,126 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-26 02:38:20,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:38:20,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54854423] [2019-11-26 02:38:20,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:38:20,217 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-26 02:38:20,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572049251] [2019-11-26 02:38:20,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/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 02:38:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:38:20,261 WARN L253 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-26 02:38:20,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:38:20,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:38:20,343 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 02:38:20,343 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:38:20,375 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 02:38:20,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54854423] [2019-11-26 02:38:20,376 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:38:20,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572049251] [2019-11-26 02:38:20,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:38:20,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-26 02:38:20,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9274462] [2019-11-26 02:38:20,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:38:20,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:38:20,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:38:20,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:38:20,397 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 6 states. [2019-11-26 02:38:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:38:20,510 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2019-11-26 02:38:20,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:38:20,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-11-26 02:38:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:38:20,518 INFO L225 Difference]: With dead ends: 26 [2019-11-26 02:38:20,518 INFO L226 Difference]: Without dead ends: 0 [2019-11-26 02:38:20,521 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:38:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-26 02:38:20,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-26 02:38:20,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-26 02:38:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-26 02:38:20,544 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2019-11-26 02:38:20,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:38:20,544 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-26 02:38:20,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:38:20,544 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-26 02:38:20,545 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-26 02:38:20,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:38:20,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-26 02:38:20,881 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2019-11-26 02:38:20,969 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-26 02:38:20,970 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2019-11-26 02:38:20,970 INFO L444 ceAbstractionStarter]: For program point L7(lines 7 10) no Hoare annotation was computed. [2019-11-26 02:38:20,970 INFO L440 ceAbstractionStarter]: At program point L7-2(lines 33 34) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (+ (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~u~0) (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~v~0)) (* (* ULTIMATE.start_main_~a~0 2) ULTIMATE.start_main_~b~0))) [2019-11-26 02:38:20,970 INFO L444 ceAbstractionStarter]: For program point L7-3(lines 7 10) no Hoare annotation was computed. [2019-11-26 02:38:20,971 INFO L440 ceAbstractionStarter]: At program point L36-2(lines 30 43) the Hoare annotation is: (or (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (+ (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~u~0) (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~v~0)) (* (* ULTIMATE.start_main_~a~0 2) ULTIMATE.start_main_~b~0))) (and (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~u~0) (<= 1 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~v~0))) [2019-11-26 02:38:20,971 INFO L440 ceAbstractionStarter]: At program point L7-5(lines 6 12) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (+ (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~u~0) (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~v~0)) (* (* ULTIMATE.start_main_~a~0 2) ULTIMATE.start_main_~b~0))) [2019-11-26 02:38:20,971 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-26 02:38:20,971 INFO L444 ceAbstractionStarter]: For program point L30-2(lines 30 43) no Hoare annotation was computed. [2019-11-26 02:38:20,971 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2019-11-26 02:38:20,971 INFO L444 ceAbstractionStarter]: For program point L8(lines 8 9) no Hoare annotation was computed. [2019-11-26 02:38:20,971 INFO L444 ceAbstractionStarter]: For program point L8-1(lines 8 9) no Hoare annotation was computed. [2019-11-26 02:38:20,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:38:20 BoogieIcfgContainer [2019-11-26 02:38:20,996 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:38:20,998 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:38:20,998 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:38:20,998 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:38:20,999 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:38:20" (3/4) ... [2019-11-26 02:38:21,005 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-26 02:38:21,016 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-11-26 02:38:21,016 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-26 02:38:21,017 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-26 02:38:21,086 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9cb58e8a-9bce-4dad-8402-6f92d78ee6c8/bin/utaipan/witness.graphml [2019-11-26 02:38:21,086 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:38:21,097 INFO L168 Benchmark]: Toolchain (without parser) took 1834.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.9 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -126.2 MB). Peak memory consumption was 33.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:38:21,098 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:38:21,098 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.9 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -204.7 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:38:21,098 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.35 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:38:21,099 INFO L168 Benchmark]: Boogie Preprocessor took 33.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:38:21,099 INFO L168 Benchmark]: RCFGBuilder took 413.55 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:38:21,100 INFO L168 Benchmark]: TraceAbstraction took 945.87 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: 45.7 MB). Peak memory consumption was 45.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:38:21,100 INFO L168 Benchmark]: Witness Printer took 88.59 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:38:21,104 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 296.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.9 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -204.7 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 38.35 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 33.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 413.55 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 945.87 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: 45.7 MB). Peak memory consumption was 45.7 MB. Max. memory is 11.5 GB. * Witness Printer took 88.59 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 == cond && x * u + y * v == a * 2 * b - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 == cond && x * u + y * v == a * 2 * b - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (1 == cond && x * u + y * v == a * 2 * b) || ((((b == y && b == u) && 1 <= a) && a == x) && a == v) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 2 error locations. Result: SAFE, OverallTime: 0.8s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 2 SDtfs, 25 SDslu, 2 SDs, 0 SdLazy, 13 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 9 NumberOfFragments, 68 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 40 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 114 SizeOfPredicates, 8 NumberOfNonLiveVariables, 25 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...