./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/apache-escape-absolute_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/apache-escape-absolute_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/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 3607a70e53f56c4b4860f9fca9676a925474c3df ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 18:22:18,534 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 18:22:18,535 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 18:22:18,541 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 18:22:18,541 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 18:22:18,542 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 18:22:18,542 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 18:22:18,543 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 18:22:18,544 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 18:22:18,545 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 18:22:18,545 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 18:22:18,545 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 18:22:18,546 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 18:22:18,546 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 18:22:18,547 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 18:22:18,547 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 18:22:18,548 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 18:22:18,549 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 18:22:18,549 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 18:22:18,550 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 18:22:18,551 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 18:22:18,551 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 18:22:18,553 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 18:22:18,553 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 18:22:18,553 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 18:22:18,553 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 18:22:18,554 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 18:22:18,554 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 18:22:18,555 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 18:22:18,555 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 18:22:18,556 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 18:22:18,556 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 18:22:18,556 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 18:22:18,556 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 18:22:18,557 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 18:22:18,557 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 18:22:18,557 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-08 18:22:18,565 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 18:22:18,565 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 18:22:18,565 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 18:22:18,565 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 18:22:18,565 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 18:22:18,566 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 18:22:18,566 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 18:22:18,566 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 18:22:18,566 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 18:22:18,566 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 18:22:18,566 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 18:22:18,566 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 18:22:18,566 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 18:22:18,567 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 18:22:18,567 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 18:22:18,567 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 18:22:18,567 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 18:22:18,567 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 18:22:18,567 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 18:22:18,567 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 18:22:18,567 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 18:22:18,567 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 18:22:18,567 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 18:22:18,568 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 18:22:18,568 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 18:22:18,568 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 18:22:18,568 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 18:22:18,568 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 18:22:18,568 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 18:22:18,568 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 18:22:18,568 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 18:22:18,568 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 18:22:18,568 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 18:22:18,568 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 18:22:18,569 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 18:22:18,569 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-08 18:22:18,569 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_6618ea28-0c7c-46ba-9ad4-751c51413ffd/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 -> 3607a70e53f56c4b4860f9fca9676a925474c3df [2018-12-08 18:22:18,586 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 18:22:18,593 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 18:22:18,595 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 18:22:18,596 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 18:22:18,596 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 18:22:18,597 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/bin-2019/utaipan/../../sv-benchmarks/c/loop-invgen/apache-escape-absolute_true-unreach-call_true-termination.i [2018-12-08 18:22:18,637 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/bin-2019/utaipan/data/b44df41c9/28e7b4c14f9f4b5a8dbdf84943f45588/FLAGf42b2dc2e [2018-12-08 18:22:19,048 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 18:22:19,049 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/sv-benchmarks/c/loop-invgen/apache-escape-absolute_true-unreach-call_true-termination.i [2018-12-08 18:22:19,052 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/bin-2019/utaipan/data/b44df41c9/28e7b4c14f9f4b5a8dbdf84943f45588/FLAGf42b2dc2e [2018-12-08 18:22:19,060 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/bin-2019/utaipan/data/b44df41c9/28e7b4c14f9f4b5a8dbdf84943f45588 [2018-12-08 18:22:19,062 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 18:22:19,063 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 18:22:19,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 18:22:19,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 18:22:19,065 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 18:22:19,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 06:22:19" (1/1) ... [2018-12-08 18:22:19,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b368404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:22:19, skipping insertion in model container [2018-12-08 18:22:19,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 06:22:19" (1/1) ... [2018-12-08 18:22:19,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 18:22:19,087 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 18:22:19,181 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 18:22:19,183 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 18:22:19,196 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 18:22:19,204 INFO L195 MainTranslator]: Completed translation [2018-12-08 18:22:19,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:22:19 WrapperNode [2018-12-08 18:22:19,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 18:22:19,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 18:22:19,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 18:22:19,205 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 18:22:19,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:22:19" (1/1) ... [2018-12-08 18:22:19,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:22:19" (1/1) ... [2018-12-08 18:22:19,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 18:22:19,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 18:22:19,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 18:22:19,218 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 18:22:19,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:22:19" (1/1) ... [2018-12-08 18:22:19,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:22:19" (1/1) ... [2018-12-08 18:22:19,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:22:19" (1/1) ... [2018-12-08 18:22:19,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:22:19" (1/1) ... [2018-12-08 18:22:19,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:22:19" (1/1) ... [2018-12-08 18:22:19,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:22:19" (1/1) ... [2018-12-08 18:22:19,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:22:19" (1/1) ... [2018-12-08 18:22:19,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 18:22:19,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 18:22:19,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 18:22:19,262 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 18:22:19,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:22:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/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 [2018-12-08 18:22:19,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 18:22:19,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 18:22:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 18:22:19,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 18:22:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 18:22:19,295 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 18:22:19,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-08 18:22:19,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-08 18:22:19,433 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 18:22:19,433 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-08 18:22:19,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 06:22:19 BoogieIcfgContainer [2018-12-08 18:22:19,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 18:22:19,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 18:22:19,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 18:22:19,436 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 18:22:19,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 06:22:19" (1/3) ... [2018-12-08 18:22:19,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3062d733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 06:22:19, skipping insertion in model container [2018-12-08 18:22:19,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 06:22:19" (2/3) ... [2018-12-08 18:22:19,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3062d733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 06:22:19, skipping insertion in model container [2018-12-08 18:22:19,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 06:22:19" (3/3) ... [2018-12-08 18:22:19,438 INFO L112 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute_true-unreach-call_true-termination.i [2018-12-08 18:22:19,444 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 18:22:19,448 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 18:22:19,457 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 18:22:19,475 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 18:22:19,475 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 18:22:19,475 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 18:22:19,475 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 18:22:19,475 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 18:22:19,475 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 18:22:19,475 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 18:22:19,475 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 18:22:19,487 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2018-12-08 18:22:19,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-08 18:22:19,490 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:22:19,491 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:22:19,492 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:22:19,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:22:19,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1277279000, now seen corresponding path program 1 times [2018-12-08 18:22:19,496 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:22:19,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:22:19,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:22:19,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:22:19,524 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:22:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:22:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 18:22:19,593 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 18:22:19,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 18:22:19,593 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 18:22:19,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 18:22:19,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 18:22:19,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 18:22:19,604 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 5 states. [2018-12-08 18:22:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:22:19,716 INFO L93 Difference]: Finished difference Result 111 states and 206 transitions. [2018-12-08 18:22:19,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 18:22:19,718 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-12-08 18:22:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:22:19,724 INFO L225 Difference]: With dead ends: 111 [2018-12-08 18:22:19,725 INFO L226 Difference]: Without dead ends: 63 [2018-12-08 18:22:19,728 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 [2018-12-08 18:22:19,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-08 18:22:19,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2018-12-08 18:22:19,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-08 18:22:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2018-12-08 18:22:19,765 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 16 [2018-12-08 18:22:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:22:19,766 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2018-12-08 18:22:19,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 18:22:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2018-12-08 18:22:19,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-08 18:22:19,767 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:22:19,767 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:22:19,768 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:22:19,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:22:19,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1256946511, now seen corresponding path program 1 times [2018-12-08 18:22:19,768 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:22:19,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:22:19,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:22:19,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:22:19,769 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:22:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:22:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 18:22:19,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:22:19,825 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 18:22:19,826 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-12-08 18:22:19,827 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [25], [31], [39], [120], [123], [125], [128], [130], [131], [132], [133], [135], [136], [137] [2018-12-08 18:22:19,847 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 18:22:19,847 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 18:22:19,923 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 18:22:19,924 INFO L272 AbstractInterpreter]: Visited 20 different actions 25 times. Never merged. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 4. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 8 variables. [2018-12-08 18:22:19,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:22:19,928 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 18:22:19,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:22:19,929 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/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 [2018-12-08 18:22:19,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:22:19,935 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 18:22:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:22:19,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:22:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 18:22:19,980 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 18:22:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 18:22:20,017 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-08 18:22:20,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 9 [2018-12-08 18:22:20,018 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 18:22:20,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 18:22:20,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 18:22:20,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-08 18:22:20,018 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand 6 states. [2018-12-08 18:22:20,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:22:20,106 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2018-12-08 18:22:20,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 18:22:20,107 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-12-08 18:22:20,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:22:20,109 INFO L225 Difference]: With dead ends: 62 [2018-12-08 18:22:20,109 INFO L226 Difference]: Without dead ends: 60 [2018-12-08 18:22:20,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-08 18:22:20,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-08 18:22:20,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-12-08 18:22:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-08 18:22:20,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 82 transitions. [2018-12-08 18:22:20,116 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 82 transitions. Word has length 21 [2018-12-08 18:22:20,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:22:20,116 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 82 transitions. [2018-12-08 18:22:20,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 18:22:20,117 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 82 transitions. [2018-12-08 18:22:20,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-12-08 18:22:20,117 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:22:20,117 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1] [2018-12-08 18:22:20,118 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:22:20,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:22:20,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2038837229, now seen corresponding path program 1 times [2018-12-08 18:22:20,118 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:22:20,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:22:20,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:22:20,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:22:20,119 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:22:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:22:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-12-08 18:22:20,147 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 18:22:20,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-08 18:22:20,147 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 18:22:20,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 18:22:20,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 18:22:20,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 18:22:20,148 INFO L87 Difference]: Start difference. First operand 60 states and 82 transitions. Second operand 3 states. [2018-12-08 18:22:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:22:20,165 INFO L93 Difference]: Finished difference Result 89 states and 122 transitions. [2018-12-08 18:22:20,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 18:22:20,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2018-12-08 18:22:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:22:20,166 INFO L225 Difference]: With dead ends: 89 [2018-12-08 18:22:20,166 INFO L226 Difference]: Without dead ends: 60 [2018-12-08 18:22:20,167 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 18:22:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-08 18:22:20,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-12-08 18:22:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-08 18:22:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2018-12-08 18:22:20,175 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 50 [2018-12-08 18:22:20,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:22:20,175 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2018-12-08 18:22:20,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 18:22:20,176 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2018-12-08 18:22:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-12-08 18:22:20,176 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:22:20,176 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1] [2018-12-08 18:22:20,176 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:22:20,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:22:20,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1689114790, now seen corresponding path program 1 times [2018-12-08 18:22:20,177 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:22:20,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:22:20,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:22:20,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:22:20,177 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:22:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:22:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-12-08 18:22:20,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:22:20,229 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 18:22:20,229 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 52 with the following transitions: [2018-12-08 18:22:20,230 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [25], [31], [39], [42], [45], [56], [59], [74], [120], [123], [125], [128], [130], [131], [132], [133], [135], [136], [137], [138], [139], [140], [141], [142], [147], [148], [149], [150], [151] [2018-12-08 18:22:20,231 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 18:22:20,231 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 18:22:20,273 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 18:22:20,273 INFO L272 AbstractInterpreter]: Visited 35 different actions 65 times. Never merged. Never widened. Performed 114 root evaluator evaluations with a maximum evaluation depth of 4. Performed 114 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 10 variables. [2018-12-08 18:22:20,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:22:20,275 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 18:22:20,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:22:20,275 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/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 [2018-12-08 18:22:20,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:22:20,282 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 18:22:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:22:20,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:22:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-12-08 18:22:20,318 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 18:22:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-12-08 18:22:20,358 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-08 18:22:20,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 9 [2018-12-08 18:22:20,359 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 18:22:20,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 18:22:20,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 18:22:20,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-12-08 18:22:20,359 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand 6 states. [2018-12-08 18:22:20,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:22:20,442 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2018-12-08 18:22:20,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 18:22:20,442 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2018-12-08 18:22:20,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:22:20,443 INFO L225 Difference]: With dead ends: 67 [2018-12-08 18:22:20,443 INFO L226 Difference]: Without dead ends: 65 [2018-12-08 18:22:20,444 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-12-08 18:22:20,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-12-08 18:22:20,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2018-12-08 18:22:20,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-08 18:22:20,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2018-12-08 18:22:20,453 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 51 [2018-12-08 18:22:20,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:22:20,454 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2018-12-08 18:22:20,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 18:22:20,454 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2018-12-08 18:22:20,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-12-08 18:22:20,456 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:22:20,456 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:22:20,456 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:22:20,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:22:20,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1728052911, now seen corresponding path program 1 times [2018-12-08 18:22:20,457 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:22:20,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:22:20,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:22:20,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:22:20,458 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:22:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:22:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-12-08 18:22:20,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:22:20,530 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 18:22:20,530 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 87 with the following transitions: [2018-12-08 18:22:20,530 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [25], [31], [39], [42], [45], [56], [59], [74], [81], [84], [95], [98], [101], [120], [123], [125], [128], [130], [131], [132], [133], [135], [136], [137], [138], [139], [140], [141], [142], [147], [148], [149], [150], [151], [152], [153], [154], [155], [156], [157], [158], [159], [160], [161], [162], [163] [2018-12-08 18:22:20,531 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 18:22:20,531 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 18:22:20,575 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 18:22:20,575 INFO L272 AbstractInterpreter]: Visited 52 different actions 112 times. Never merged. Never widened. Performed 188 root evaluator evaluations with a maximum evaluation depth of 4. Performed 188 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 14 variables. [2018-12-08 18:22:20,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:22:20,576 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 18:22:20,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:22:20,576 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/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 [2018-12-08 18:22:20,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:22:20,585 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 18:22:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:22:20,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:22:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-12-08 18:22:20,628 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 18:22:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-12-08 18:22:20,692 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-08 18:22:20,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 9 [2018-12-08 18:22:20,693 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 18:22:20,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 18:22:20,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 18:22:20,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-12-08 18:22:20,693 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 6 states. [2018-12-08 18:22:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:22:20,730 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2018-12-08 18:22:20,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 18:22:20,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2018-12-08 18:22:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:22:20,731 INFO L225 Difference]: With dead ends: 73 [2018-12-08 18:22:20,731 INFO L226 Difference]: Without dead ends: 71 [2018-12-08 18:22:20,732 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 169 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-12-08 18:22:20,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-08 18:22:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2018-12-08 18:22:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-08 18:22:20,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2018-12-08 18:22:20,737 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 86 [2018-12-08 18:22:20,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:22:20,737 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2018-12-08 18:22:20,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 18:22:20,738 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2018-12-08 18:22:20,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-12-08 18:22:20,738 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 18:22:20,738 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 18:22:20,739 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 18:22:20,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:22:20,739 INFO L82 PathProgramCache]: Analyzing trace with hash -733340726, now seen corresponding path program 1 times [2018-12-08 18:22:20,739 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 18:22:20,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:22:20,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:22:20,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 18:22:20,739 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 18:22:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:22:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 25 proven. 37 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2018-12-08 18:22:20,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:22:20,798 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 18:22:20,799 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 92 with the following transitions: [2018-12-08 18:22:20,799 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [25], [31], [39], [42], [45], [56], [59], [74], [81], [84], [95], [98], [101], [120], [123], [125], [128], [130], [131], [132], [133], [135], [136], [137], [138], [139], [140], [141], [142], [147], [148], [149], [150], [151], [152], [153], [154], [155], [156], [157], [158], [159], [160], [161], [162], [163], [164], [165] [2018-12-08 18:22:20,800 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 18:22:20,800 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 18:22:20,837 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 18:22:20,837 INFO L272 AbstractInterpreter]: Visited 54 different actions 119 times. Never merged. Never widened. Performed 196 root evaluator evaluations with a maximum evaluation depth of 4. Performed 196 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 14 variables. [2018-12-08 18:22:20,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 18:22:20,838 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 18:22:20,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 18:22:20,838 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 18:22:20,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 18:22:20,844 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 18:22:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 18:22:20,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 18:22:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2018-12-08 18:22:20,900 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 18:22:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2018-12-08 18:22:20,958 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-08 18:22:20,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 11 [2018-12-08 18:22:20,958 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 18:22:20,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 18:22:20,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 18:22:20,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-12-08 18:22:20,959 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 6 states. [2018-12-08 18:22:21,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 18:22:21,003 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2018-12-08 18:22:21,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 18:22:21,004 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2018-12-08 18:22:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 18:22:21,004 INFO L225 Difference]: With dead ends: 74 [2018-12-08 18:22:21,004 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 18:22:21,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-08 18:22:21,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 18:22:21,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 18:22:21,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 18:22:21,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 18:22:21,005 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 91 [2018-12-08 18:22:21,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 18:22:21,005 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 18:22:21,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 18:22:21,005 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 18:22:21,005 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 18:22:21,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-08 18:22:21,164 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-08 18:22:21,164 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-08 18:22:21,165 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-08 18:22:21,165 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-08 18:22:21,165 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-08 18:22:21,165 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-08 18:22:21,165 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 69) no Hoare annotation was computed. [2018-12-08 18:22:21,165 INFO L448 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2018-12-08 18:22:21,165 INFO L448 ceAbstractionStarter]: For program point L36(line 36) no Hoare annotation was computed. [2018-12-08 18:22:21,165 INFO L444 ceAbstractionStarter]: At program point L28(line 28) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 0 main_~scheme~0)) [2018-12-08 18:22:21,165 INFO L444 ceAbstractionStarter]: At program point L28-1(line 28) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 0 main_~scheme~0)) [2018-12-08 18:22:21,165 INFO L444 ceAbstractionStarter]: At program point L53(line 53) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (not (= main_~urilen~0 .cse0)) (<= 1 main_~cp~0) (<= 0 main_~c~0) (<= .cse0 main_~urilen~0) (<= 0 main_~scheme~0) (<= (+ main_~c~0 2) main_~tokenlen~0))) [2018-12-08 18:22:21,165 INFO L448 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-12-08 18:22:21,165 INFO L444 ceAbstractionStarter]: At program point L53-1(line 53) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (not (= main_~urilen~0 .cse0)) (<= 1 main_~cp~0) (<= 0 main_~c~0) (<= .cse0 main_~urilen~0) (<= 0 main_~scheme~0) (<= (+ main_~c~0 2) main_~tokenlen~0))) [2018-12-08 18:22:21,165 INFO L448 ceAbstractionStarter]: For program point L29(line 29) no Hoare annotation was computed. [2018-12-08 18:22:21,165 INFO L448 ceAbstractionStarter]: For program point L54(line 54) no Hoare annotation was computed. [2018-12-08 18:22:21,165 INFO L448 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-12-08 18:22:21,166 INFO L448 ceAbstractionStarter]: For program point L21-1(lines 11 69) no Hoare annotation was computed. [2018-12-08 18:22:21,166 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 69) no Hoare annotation was computed. [2018-12-08 18:22:21,166 INFO L448 ceAbstractionStarter]: For program point L30(lines 30 66) no Hoare annotation was computed. [2018-12-08 18:22:21,166 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 69) the Hoare annotation is: true [2018-12-08 18:22:21,166 INFO L448 ceAbstractionStarter]: For program point L55(lines 55 61) no Hoare annotation was computed. [2018-12-08 18:22:21,166 INFO L448 ceAbstractionStarter]: For program point L22(lines 11 69) no Hoare annotation was computed. [2018-12-08 18:22:21,166 INFO L448 ceAbstractionStarter]: For program point L55-1(lines 55 61) no Hoare annotation was computed. [2018-12-08 18:22:21,166 INFO L448 ceAbstractionStarter]: For program point L47(lines 47 65) no Hoare annotation was computed. [2018-12-08 18:22:21,166 INFO L444 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 0 main_~scheme~0)) [2018-12-08 18:22:21,166 INFO L444 ceAbstractionStarter]: At program point L31(line 31) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 0 main_~scheme~0)) [2018-12-08 18:22:21,166 INFO L444 ceAbstractionStarter]: At program point L31-1(line 31) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 0 main_~scheme~0)) [2018-12-08 18:22:21,166 INFO L448 ceAbstractionStarter]: For program point L23(lines 11 69) no Hoare annotation was computed. [2018-12-08 18:22:21,166 INFO L448 ceAbstractionStarter]: For program point L40(lines 30 66) no Hoare annotation was computed. [2018-12-08 18:22:21,166 INFO L444 ceAbstractionStarter]: At program point L57(line 57) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= (+ main_~c~0 1) main_~tokenlen~0) (not (= main_~urilen~0 .cse0)) (<= 1 main_~cp~0) (<= .cse0 main_~urilen~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0))) [2018-12-08 18:22:21,166 INFO L444 ceAbstractionStarter]: At program point L57-1(line 57) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= (+ main_~c~0 1) main_~tokenlen~0) (not (= main_~urilen~0 .cse0)) (<= 1 main_~cp~0) (<= .cse0 main_~urilen~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0))) [2018-12-08 18:22:21,166 INFO L444 ceAbstractionStarter]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (not (= main_~urilen~0 .cse0)) (<= 1 main_~cp~0) (<= 0 main_~c~0) (<= .cse0 main_~urilen~0) (<= 0 main_~scheme~0))) [2018-12-08 18:22:21,167 INFO L444 ceAbstractionStarter]: At program point L49-1(line 49) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (not (= main_~urilen~0 .cse0)) (<= 1 main_~cp~0) (<= 0 main_~c~0) (<= .cse0 main_~urilen~0) (<= 0 main_~scheme~0))) [2018-12-08 18:22:21,167 INFO L444 ceAbstractionStarter]: At program point L33-1(lines 32 38) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 0 main_~scheme~0)) [2018-12-08 18:22:21,167 INFO L444 ceAbstractionStarter]: At program point L33-2(lines 33 38) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 0 main_~scheme~0)) [2018-12-08 18:22:21,167 INFO L444 ceAbstractionStarter]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= (+ main_~c~0 1) main_~tokenlen~0) (not (= main_~urilen~0 .cse0)) (<= 1 main_~cp~0) (<= .cse0 main_~urilen~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0))) [2018-12-08 18:22:21,167 INFO L444 ceAbstractionStarter]: At program point L42(line 42) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (not (= main_~urilen~0 .cse0)) (<= 1 main_~cp~0) (<= .cse0 main_~urilen~0) (<= 0 main_~scheme~0))) [2018-12-08 18:22:21,167 INFO L444 ceAbstractionStarter]: At program point L42-1(line 42) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (not (= main_~urilen~0 .cse0)) (<= 1 main_~cp~0) (<= .cse0 main_~urilen~0) (<= 0 main_~scheme~0))) [2018-12-08 18:22:21,167 INFO L451 ceAbstractionStarter]: At program point L67(lines 11 69) the Hoare annotation is: true [2018-12-08 18:22:21,167 INFO L448 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-12-08 18:22:21,167 INFO L444 ceAbstractionStarter]: At program point L59(line 59) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (<= (+ main_~c~0 1) main_~tokenlen~0) (not (= main_~urilen~0 .cse0)) (<= 1 main_~cp~0) (<= .cse0 main_~urilen~0) (<= 0 main_~scheme~0) (<= 1 main_~c~0))) [2018-12-08 18:22:21,167 INFO L448 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2018-12-08 18:22:21,167 INFO L444 ceAbstractionStarter]: At program point L51-1(lines 50 63) the Hoare annotation is: (and (<= 1 main_~cp~0) (<= 0 main_~c~0) (<= (+ main_~cp~0 1) main_~urilen~0) (<= 0 main_~scheme~0)) [2018-12-08 18:22:21,167 INFO L448 ceAbstractionStarter]: For program point L43(lines 30 66) no Hoare annotation was computed. [2018-12-08 18:22:21,167 INFO L444 ceAbstractionStarter]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (not (= main_~urilen~0 .cse0)) (<= 1 main_~cp~0) (<= .cse0 main_~urilen~0) (<= 0 main_~scheme~0))) [2018-12-08 18:22:21,168 INFO L444 ceAbstractionStarter]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse0 (+ main_~cp~0 1))) (and (not (= main_~urilen~0 .cse0)) (<= 1 main_~cp~0) (<= .cse0 main_~urilen~0) (<= 0 main_~scheme~0))) [2018-12-08 18:22:21,168 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-12-08 18:22:21,168 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-12-08 18:22:21,168 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-12-08 18:22:21,168 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-08 18:22:21,168 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-12-08 18:22:21,168 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-12-08 18:22:21,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 06:22:21 BoogieIcfgContainer [2018-12-08 18:22:21,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 18:22:21,176 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 18:22:21,176 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 18:22:21,177 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 18:22:21,177 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 06:22:19" (3/4) ... [2018-12-08 18:22:21,180 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 18:22:21,184 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 18:22:21,184 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 18:22:21,184 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-08 18:22:21,187 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2018-12-08 18:22:21,187 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-12-08 18:22:21,187 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 18:22:21,223 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6618ea28-0c7c-46ba-9ad4-751c51413ffd/bin-2019/utaipan/witness.graphml [2018-12-08 18:22:21,223 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 18:22:21,224 INFO L168 Benchmark]: Toolchain (without parser) took 2161.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 211.8 MB). Free memory was 962.4 MB in the beginning and 1.1 GB in the end (delta: -153.7 MB). Peak memory consumption was 58.1 MB. Max. memory is 11.5 GB. [2018-12-08 18:22:21,225 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 18:22:21,225 INFO L168 Benchmark]: CACSL2BoogieTranslator took 141.31 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 18:22:21,226 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.52 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 18:22:21,226 INFO L168 Benchmark]: Boogie Preprocessor took 44.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 951.7 MB in the beginning and 1.1 GB in the end (delta: -178.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-08 18:22:21,226 INFO L168 Benchmark]: RCFGBuilder took 171.38 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: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. [2018-12-08 18:22:21,226 INFO L168 Benchmark]: TraceAbstraction took 1742.10 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 76.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -7.2 MB). Peak memory consumption was 69.3 MB. Max. memory is 11.5 GB. [2018-12-08 18:22:21,227 INFO L168 Benchmark]: Witness Printer took 47.02 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 18:22:21,228 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 141.31 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 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 12.52 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 44.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 951.7 MB in the beginning and 1.1 GB in the end (delta: -178.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 171.38 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: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1742.10 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 76.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -7.2 MB). Peak memory consumption was 69.3 MB. Max. memory is 11.5 GB. * Witness Printer took 47.02 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. 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: 50]: Loop Invariant Derived loop invariant: ((1 <= cp && 0 <= c) && cp + 1 <= urilen) && 0 <= scheme - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (1 <= cp && cp + 1 <= urilen) && 0 <= scheme - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 53 locations, 1 error locations. SAFE Result, 1.6s OverallTime, 6 OverallIterations, 14 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 390 SDtfs, 88 SDslu, 960 SDs, 0 SdLazy, 321 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 547 GetRequests, 495 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 26 LocationsWithAnnotation, 76 PreInvPairs, 102 NumberOfFragments, 376 HoareAnnotationTreeSize, 76 FomulaSimplifications, 154 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 26 FomulaSimplificationsInter, 120 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 564 NumberOfCodeBlocks, 564 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 799 ConstructedInterpolants, 0 QuantifiedInterpolants, 87319 SizeOfPredicates, 14 NumberOfNonLiveVariables, 522 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 14 InterpolantComputations, 10 PerfectInterpolantSequences, 2077/2172 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...