./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/apache-get-tag_true-unreach-call_true-termination.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_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/apache-get-tag_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/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 01c80fcdd0a0da14cc25a34188deb5573e4a4209 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 15:06:23,585 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 15:06:23,587 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 15:06:23,594 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 15:06:23,595 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 15:06:23,595 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 15:06:23,596 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 15:06:23,597 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 15:06:23,599 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 15:06:23,599 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 15:06:23,600 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 15:06:23,600 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 15:06:23,601 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 15:06:23,602 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 15:06:23,603 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 15:06:23,603 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 15:06:23,604 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 15:06:23,605 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 15:06:23,607 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 15:06:23,608 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 15:06:23,609 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 15:06:23,610 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 15:06:23,612 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 15:06:23,612 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 15:06:23,612 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 15:06:23,613 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 15:06:23,613 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 15:06:23,614 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 15:06:23,615 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 15:06:23,616 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 15:06:23,616 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 15:06:23,616 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 15:06:23,616 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 15:06:23,617 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 15:06:23,617 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 15:06:23,618 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 15:06:23,618 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-23 15:06:23,628 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 15:06:23,628 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 15:06:23,629 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 15:06:23,629 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 15:06:23,629 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 15:06:23,630 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 15:06:23,630 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 15:06:23,630 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 15:06:23,630 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 15:06:23,630 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 15:06:23,630 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 15:06:23,631 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 15:06:23,631 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 15:06:23,631 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 15:06:23,631 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 15:06:23,632 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 15:06:23,632 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 15:06:23,632 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 15:06:23,632 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 15:06:23,632 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 15:06:23,632 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 15:06:23,632 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 15:06:23,633 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 15:06:23,633 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 15:06:23,633 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 15:06:23,633 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 15:06:23,633 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 15:06:23,633 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 15:06:23,634 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 15:06:23,634 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 15:06:23,634 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 15:06:23,634 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 15:06:23,634 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 15:06:23,634 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 15:06:23,634 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 15:06:23,635 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 15:06:23,635 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 15:06:23,635 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_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/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 -> 01c80fcdd0a0da14cc25a34188deb5573e4a4209 [2018-11-23 15:06:23,658 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 15:06:23,666 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 15:06:23,669 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 15:06:23,671 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 15:06:23,671 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 15:06:23,672 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/bin-2019/utaipan/../../sv-benchmarks/c/loop-invgen/apache-get-tag_true-unreach-call_true-termination.i [2018-11-23 15:06:23,712 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/bin-2019/utaipan/data/4c62f791c/25665d731cfa41109cb1eb8de03b39b9/FLAG7462f47b7 [2018-11-23 15:06:24,057 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 15:06:24,057 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/sv-benchmarks/c/loop-invgen/apache-get-tag_true-unreach-call_true-termination.i [2018-11-23 15:06:24,063 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/bin-2019/utaipan/data/4c62f791c/25665d731cfa41109cb1eb8de03b39b9/FLAG7462f47b7 [2018-11-23 15:06:24,474 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/bin-2019/utaipan/data/4c62f791c/25665d731cfa41109cb1eb8de03b39b9 [2018-11-23 15:06:24,477 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 15:06:24,478 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 15:06:24,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 15:06:24,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 15:06:24,481 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 15:06:24,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:06:24" (1/1) ... [2018-11-23 15:06:24,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73b49ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:24, skipping insertion in model container [2018-11-23 15:06:24,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:06:24" (1/1) ... [2018-11-23 15:06:24,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 15:06:24,505 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 15:06:24,627 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 15:06:24,630 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 15:06:24,647 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 15:06:24,658 INFO L195 MainTranslator]: Completed translation [2018-11-23 15:06:24,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:24 WrapperNode [2018-11-23 15:06:24,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 15:06:24,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 15:06:24,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 15:06:24,660 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 15:06:24,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:24" (1/1) ... [2018-11-23 15:06:24,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:24" (1/1) ... [2018-11-23 15:06:24,674 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 15:06:24,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 15:06:24,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 15:06:24,674 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 15:06:24,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:24" (1/1) ... [2018-11-23 15:06:24,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:24" (1/1) ... [2018-11-23 15:06:24,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:24" (1/1) ... [2018-11-23 15:06:24,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:24" (1/1) ... [2018-11-23 15:06:24,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:24" (1/1) ... [2018-11-23 15:06:24,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:24" (1/1) ... [2018-11-23 15:06:24,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:24" (1/1) ... [2018-11-23 15:06:24,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 15:06:24,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 15:06:24,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 15:06:24,692 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 15:06:24,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/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 15:06:24,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 15:06:24,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 15:06:24,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 15:06:24,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 15:06:24,773 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 15:06:24,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 15:06:24,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-23 15:06:24,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-23 15:06:24,919 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 15:06:24,919 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-11-23 15:06:24,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:06:24 BoogieIcfgContainer [2018-11-23 15:06:24,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 15:06:24,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 15:06:24,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 15:06:24,922 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 15:06:24,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:06:24" (1/3) ... [2018-11-23 15:06:24,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2487bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:06:24, skipping insertion in model container [2018-11-23 15:06:24,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:24" (2/3) ... [2018-11-23 15:06:24,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2487bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:06:24, skipping insertion in model container [2018-11-23 15:06:24,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:06:24" (3/3) ... [2018-11-23 15:06:24,925 INFO L112 eAbstractionObserver]: Analyzing ICFG apache-get-tag_true-unreach-call_true-termination.i [2018-11-23 15:06:24,932 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 15:06:24,937 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 15:06:24,948 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 15:06:24,969 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 15:06:24,969 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 15:06:24,970 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 15:06:24,970 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 15:06:24,970 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 15:06:24,970 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 15:06:24,970 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 15:06:24,970 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 15:06:24,982 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-11-23 15:06:24,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-23 15:06:24,986 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:06:24,986 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:06:24,988 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:06:24,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:06:24,992 INFO L82 PathProgramCache]: Analyzing trace with hash 2074932940, now seen corresponding path program 1 times [2018-11-23 15:06:24,993 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:06:25,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:06:25,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:06:25,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:06:25,033 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:06:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:06:25,074 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 15:06:25,075 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 15:06:25,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-23 15:06:25,076 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 15:06:25,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-23 15:06:25,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-23 15:06:25,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-23 15:06:25,089 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2018-11-23 15:06:25,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:06:25,115 INFO L93 Difference]: Finished difference Result 87 states and 156 transitions. [2018-11-23 15:06:25,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-23 15:06:25,116 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-11-23 15:06:25,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:06:25,123 INFO L225 Difference]: With dead ends: 87 [2018-11-23 15:06:25,123 INFO L226 Difference]: Without dead ends: 42 [2018-11-23 15:06:25,126 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-23 15:06:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-23 15:06:25,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-23 15:06:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-23 15:06:25,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2018-11-23 15:06:25,157 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 12 [2018-11-23 15:06:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:06:25,157 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2018-11-23 15:06:25,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-23 15:06:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2018-11-23 15:06:25,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 15:06:25,158 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:06:25,158 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:06:25,158 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:06:25,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:06:25,159 INFO L82 PathProgramCache]: Analyzing trace with hash -132543993, now seen corresponding path program 1 times [2018-11-23 15:06:25,159 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:06:25,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:06:25,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:06:25,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:06:25,160 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:06:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:06:25,215 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 15:06:25,216 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 15:06:25,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 15:06:25,216 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 15:06:25,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 15:06:25,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 15:06:25,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:06:25,218 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 5 states. [2018-11-23 15:06:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:06:25,372 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2018-11-23 15:06:25,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 15:06:25,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-23 15:06:25,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:06:25,374 INFO L225 Difference]: With dead ends: 48 [2018-11-23 15:06:25,374 INFO L226 Difference]: Without dead ends: 46 [2018-11-23 15:06:25,375 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 15:06:25,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-23 15:06:25,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-11-23 15:06:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-23 15:06:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2018-11-23 15:06:25,385 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 13 [2018-11-23 15:06:25,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:06:25,386 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2018-11-23 15:06:25,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 15:06:25,386 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2018-11-23 15:06:25,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-23 15:06:25,386 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:06:25,387 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:06:25,387 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:06:25,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:06:25,387 INFO L82 PathProgramCache]: Analyzing trace with hash -811261734, now seen corresponding path program 1 times [2018-11-23 15:06:25,387 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:06:25,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:06:25,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:06:25,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:06:25,389 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:06:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:06:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 15:06:25,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:06:25,471 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:06:25,472 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-11-23 15:06:25,473 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [20], [23], [96], [99], [101], [104], [106], [107], [108], [109], [111], [112], [113] [2018-11-23 15:06:25,501 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 15:06:25,501 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 15:06:25,602 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 15:06:25,603 INFO L272 AbstractInterpreter]: Visited 17 different actions 22 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 3. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 4 variables. [2018-11-23 15:06:25,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:06:25,613 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 15:06:25,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:06:25,613 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/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 15:06:25,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:06:25,631 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 15:06:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:06:25,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:06:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 15:06:25,692 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:06:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 15:06:25,742 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-23 15:06:25,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 10 [2018-11-23 15:06:25,742 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 15:06:25,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 15:06:25,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 15:06:25,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-23 15:06:25,743 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 5 states. [2018-11-23 15:06:25,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:06:25,794 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2018-11-23 15:06:25,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 15:06:25,795 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-11-23 15:06:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:06:25,797 INFO L225 Difference]: With dead ends: 52 [2018-11-23 15:06:25,797 INFO L226 Difference]: Without dead ends: 40 [2018-11-23 15:06:25,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-23 15:06:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-23 15:06:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-11-23 15:06:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-23 15:06:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2018-11-23 15:06:25,804 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 18 [2018-11-23 15:06:25,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:06:25,804 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2018-11-23 15:06:25,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 15:06:25,805 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2018-11-23 15:06:25,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-23 15:06:25,805 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:06:25,805 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:06:25,806 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:06:25,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:06:25,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1679618026, now seen corresponding path program 1 times [2018-11-23 15:06:25,806 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:06:25,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:06:25,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:06:25,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:06:25,807 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:06:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:06:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 15:06:25,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:06:25,872 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:06:25,872 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-11-23 15:06:25,872 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [20], [27], [32], [96], [99], [101], [104], [106], [107], [108], [109], [115], [116], [117] [2018-11-23 15:06:25,873 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 15:06:25,873 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 15:06:25,887 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 15:06:25,887 INFO L272 AbstractInterpreter]: Visited 18 different actions 23 times. Never merged. Never widened. Performed 36 root evaluator evaluations with a maximum evaluation depth of 3. Performed 36 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 5 variables. [2018-11-23 15:06:25,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:06:25,890 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 15:06:25,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:06:25,891 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/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 15:06:25,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:06:25,897 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 15:06:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:06:25,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:06:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 15:06:25,957 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:06:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 15:06:26,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:06:26,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2018-11-23 15:06:26,075 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:06:26,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 15:06:26,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 15:06:26,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-11-23 15:06:26,076 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 11 states. [2018-11-23 15:06:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:06:26,387 INFO L93 Difference]: Finished difference Result 81 states and 108 transitions. [2018-11-23 15:06:26,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 15:06:26,387 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-11-23 15:06:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:06:26,392 INFO L225 Difference]: With dead ends: 81 [2018-11-23 15:06:26,392 INFO L226 Difference]: Without dead ends: 77 [2018-11-23 15:06:26,393 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-11-23 15:06:26,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-11-23 15:06:26,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2018-11-23 15:06:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-23 15:06:26,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2018-11-23 15:06:26,411 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 19 [2018-11-23 15:06:26,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:06:26,411 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2018-11-23 15:06:26,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 15:06:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2018-11-23 15:06:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-23 15:06:26,413 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:06:26,413 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:06:26,413 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:06:26,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:06:26,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1876677586, now seen corresponding path program 1 times [2018-11-23 15:06:26,414 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:06:26,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:06:26,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:06:26,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:06:26,415 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:06:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:06:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-23 15:06:26,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:06:26,513 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:06:26,513 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 47 with the following transitions: [2018-11-23 15:06:26,514 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [20], [27], [30], [41], [50], [57], [60], [63], [66], [73], [96], [99], [101], [104], [106], [107], [108], [109], [119], [120], [121], [122], [127], [128], [129], [130], [135], [136], [137] [2018-11-23 15:06:26,515 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 15:06:26,516 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 15:06:26,555 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 15:06:26,555 INFO L272 AbstractInterpreter]: Visited 33 different actions 58 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 9 variables. [2018-11-23 15:06:26,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:06:26,559 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 15:06:26,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:06:26,559 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/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 15:06:26,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:06:26,572 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 15:06:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:06:26,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:06:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-23 15:06:26,634 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:06:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-11-23 15:06:26,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:06:26,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 12 [2018-11-23 15:06:26,716 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:06:26,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 15:06:26,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 15:06:26,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-11-23 15:06:26,717 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 11 states. [2018-11-23 15:06:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:06:26,851 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2018-11-23 15:06:26,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 15:06:26,851 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2018-11-23 15:06:26,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:06:26,852 INFO L225 Difference]: With dead ends: 77 [2018-11-23 15:06:26,852 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 15:06:26,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-11-23 15:06:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 15:06:26,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 15:06:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 15:06:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 15:06:26,853 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2018-11-23 15:06:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:06:26,853 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 15:06:26,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 15:06:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 15:06:26,854 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 15:06:26,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 15:06:27,027 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 15:06:27,028 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 15:06:27,028 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 15:06:27,028 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 15:06:27,028 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 15:06:27,028 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 15:06:27,028 INFO L444 ceAbstractionStarter]: At program point L31(line 31) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,028 INFO L451 ceAbstractionStarter]: At program point L60(lines 11 63) the Hoare annotation is: true [2018-11-23 15:06:27,028 INFO L444 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,028 INFO L444 ceAbstractionStarter]: At program point L27-1(line 27) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,028 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 63) no Hoare annotation was computed. [2018-11-23 15:06:27,028 INFO L448 ceAbstractionStarter]: For program point L56(line 56) no Hoare annotation was computed. [2018-11-23 15:06:27,029 INFO L448 ceAbstractionStarter]: For program point L52(lines 52 54) no Hoare annotation was computed. [2018-11-23 15:06:27,029 INFO L448 ceAbstractionStarter]: For program point L19(lines 19 23) no Hoare annotation was computed. [2018-11-23 15:06:27,029 INFO L448 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-11-23 15:06:27,029 INFO L448 ceAbstractionStarter]: For program point L15-1(line 15) no Hoare annotation was computed. [2018-11-23 15:06:27,029 INFO L448 ceAbstractionStarter]: For program point L40(lines 40 54) no Hoare annotation was computed. [2018-11-23 15:06:27,029 INFO L444 ceAbstractionStarter]: At program point L40-1(lines 40 54) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,029 INFO L444 ceAbstractionStarter]: At program point L36(line 36) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,029 INFO L444 ceAbstractionStarter]: At program point L36-1(line 36) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,029 INFO L448 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2018-11-23 15:06:27,030 INFO L448 ceAbstractionStarter]: For program point L28(line 28) no Hoare annotation was computed. [2018-11-23 15:06:27,030 INFO L448 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2018-11-23 15:06:27,030 INFO L444 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,030 INFO L444 ceAbstractionStarter]: At program point L20-1(line 20) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,030 INFO L448 ceAbstractionStarter]: For program point L45(lines 45 49) no Hoare annotation was computed. [2018-11-23 15:06:27,030 INFO L448 ceAbstractionStarter]: For program point L41(lines 41 50) no Hoare annotation was computed. [2018-11-23 15:06:27,030 INFO L444 ceAbstractionStarter]: At program point L46(line 46) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,030 INFO L444 ceAbstractionStarter]: At program point L46-1(line 46) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,030 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 63) no Hoare annotation was computed. [2018-11-23 15:06:27,030 INFO L444 ceAbstractionStarter]: At program point L42(line 42) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,031 INFO L444 ceAbstractionStarter]: At program point L42-1(line 42) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,031 INFO L444 ceAbstractionStarter]: At program point L34-2(lines 34 58) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,031 INFO L444 ceAbstractionStarter]: At program point L34-3(lines 34 58) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,031 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 63) the Hoare annotation is: true [2018-11-23 15:06:27,031 INFO L444 ceAbstractionStarter]: At program point L59(line 59) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,031 INFO L444 ceAbstractionStarter]: At program point L55(line 55) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,031 INFO L444 ceAbstractionStarter]: At program point L18-2(lines 18 30) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,031 INFO L444 ceAbstractionStarter]: At program point L18-3(lines 18 30) the Hoare annotation is: (and (<= (+ main_~t~0 1) main_~tagbuf_len~0) (<= 0 main_~t~0)) [2018-11-23 15:06:27,031 INFO L448 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2018-11-23 15:06:27,031 INFO L448 ceAbstractionStarter]: For program point L35(lines 35 39) no Hoare annotation was computed. [2018-11-23 15:06:27,031 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-23 15:06:27,032 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-23 15:06:27,032 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-23 15:06:27,032 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-23 15:06:27,032 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-23 15:06:27,032 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-23 15:06:27,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:06:27 BoogieIcfgContainer [2018-11-23 15:06:27,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 15:06:27,041 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 15:06:27,041 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 15:06:27,041 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 15:06:27,042 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:06:24" (3/4) ... [2018-11-23 15:06:27,045 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 15:06:27,049 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 15:06:27,050 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 15:06:27,050 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-23 15:06:27,054 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2018-11-23 15:06:27,054 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 15:06:27,054 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 15:06:27,098 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a0e83ccd-1eef-4241-bab1-2a94447d2f9e/bin-2019/utaipan/witness.graphml [2018-11-23 15:06:27,098 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 15:06:27,099 INFO L168 Benchmark]: Toolchain (without parser) took 2621.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 952.7 MB in the beginning and 844.2 MB in the end (delta: 108.5 MB). Peak memory consumption was 267.4 MB. Max. memory is 11.5 GB. [2018-11-23 15:06:27,100 INFO L168 Benchmark]: CDTParser took 0.20 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 15:06:27,101 INFO L168 Benchmark]: CACSL2BoogieTranslator took 181.15 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 941.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 15:06:27,101 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.48 ms. Allocated memory is still 1.0 GB. Free memory was 941.9 MB in the beginning and 939.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 15:06:27,101 INFO L168 Benchmark]: Boogie Preprocessor took 17.33 ms. Allocated memory is still 1.0 GB. Free memory is still 939.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 15:06:27,101 INFO L168 Benchmark]: RCFGBuilder took 227.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -201.0 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. [2018-11-23 15:06:27,102 INFO L168 Benchmark]: TraceAbstraction took 2121.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 849.1 MB in the end (delta: 291.1 MB). Peak memory consumption was 291.1 MB. Max. memory is 11.5 GB. [2018-11-23 15:06:27,102 INFO L168 Benchmark]: Witness Printer took 56.96 ms. Allocated memory is still 1.2 GB. Free memory was 849.1 MB in the beginning and 844.2 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. [2018-11-23 15:06:27,107 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 181.15 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 941.9 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 14.48 ms. Allocated memory is still 1.0 GB. Free memory was 941.9 MB in the beginning and 939.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.33 ms. Allocated memory is still 1.0 GB. Free memory is still 939.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 227.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -201.0 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2121.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 849.1 MB in the end (delta: 291.1 MB). Peak memory consumption was 291.1 MB. Max. memory is 11.5 GB. * Witness Printer took 56.96 ms. Allocated memory is still 1.2 GB. Free memory was 849.1 MB in the beginning and 844.2 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 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: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: t <= tagbuf_len && 0 <= t - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (1 <= tagbuf_len && t <= tagbuf_len) && 0 <= t - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 47 locations, 1 error locations. SAFE Result, 2.0s OverallTime, 5 OverallIterations, 6 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 234 SDtfs, 120 SDslu, 553 SDs, 0 SdLazy, 500 SolverSat, 140 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 216 GetRequests, 161 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 24 LocationsWithAnnotation, 69 PreInvPairs, 103 NumberOfFragments, 157 HoareAnnotationTreeSize, 69 FomulaSimplifications, 124 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 24 FomulaSimplificationsInter, 124 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 191 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 263 ConstructedInterpolants, 0 QuantifiedInterpolants, 17876 SizeOfPredicates, 10 NumberOfNonLiveVariables, 174 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 126/162 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...