./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i5_o5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i5_o5-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e05793781d8e05fe8376a30b6751438f3b1a9d08 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:58:19,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:58:19,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:58:19,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:58:19,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:58:19,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:58:19,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:58:19,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:58:19,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:58:19,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:58:19,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:58:19,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:58:19,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:58:19,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:58:19,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:58:19,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:58:19,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:58:19,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:58:19,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:58:19,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:58:19,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:58:19,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:58:19,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:58:19,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:58:19,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:58:19,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:58:19,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:58:19,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:58:19,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:58:19,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:58:19,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:58:19,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:58:19,529 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:58:19,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:58:19,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:58:19,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:58:19,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:58:19,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:58:19,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:58:19,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:58:19,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:58:19,536 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:58:19,547 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:58:19,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:58:19,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:58:19,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:58:19,558 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:58:19,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:58:19,558 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:58:19,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:58:19,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:58:19,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:58:19,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:58:19,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:58:19,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:58:19,559 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:58:19,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:58:19,560 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:58:19,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:58:19,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:58:19,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:58:19,560 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:58:19,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:58:19,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:58:19,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:58:19,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:58:19,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:58:19,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:58:19,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:58:19,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:58:19,562 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer 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 -> Automizer 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 -> e05793781d8e05fe8376a30b6751438f3b1a9d08 [2019-10-22 08:58:19,594 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:58:19,606 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:58:19,609 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:58:19,611 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:58:19,611 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:58:19,612 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i5_o5-2.c [2019-10-22 08:58:19,671 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/data/36924cd5c/6d16c9d306934a109ebc56802f0c8348/FLAGffb9a2a39 [2019-10-22 08:58:20,053 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:58:20,054 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/sv-benchmarks/c/recursive-simple/id_i5_o5-2.c [2019-10-22 08:58:20,059 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/data/36924cd5c/6d16c9d306934a109ebc56802f0c8348/FLAGffb9a2a39 [2019-10-22 08:58:20,071 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/data/36924cd5c/6d16c9d306934a109ebc56802f0c8348 [2019-10-22 08:58:20,073 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:58:20,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:58:20,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:58:20,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:58:20,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:58:20,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:58:20" (1/1) ... [2019-10-22 08:58:20,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69640aa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:20, skipping insertion in model container [2019-10-22 08:58:20,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:58:20" (1/1) ... [2019-10-22 08:58:20,087 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:58:20,104 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:58:20,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:58:20,277 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:58:20,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:58:20,368 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:58:20,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:20 WrapperNode [2019-10-22 08:58:20,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:58:20,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:58:20,370 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:58:20,370 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:58:20,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:20" (1/1) ... [2019-10-22 08:58:20,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:20" (1/1) ... [2019-10-22 08:58:20,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:58:20,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:58:20,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:58:20,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:58:20,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:20" (1/1) ... [2019-10-22 08:58:20,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:20" (1/1) ... [2019-10-22 08:58:20,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:20" (1/1) ... [2019-10-22 08:58:20,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:20" (1/1) ... [2019-10-22 08:58:20,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:20" (1/1) ... [2019-10-22 08:58:20,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:20" (1/1) ... [2019-10-22 08:58:20,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:20" (1/1) ... [2019-10-22 08:58:20,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:58:20,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:58:20,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:58:20,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:58:20,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:58:20,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:58:20,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:58:20,474 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-10-22 08:58:20,474 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-10-22 08:58:20,615 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:58:20,616 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 08:58:20,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:58:20 BoogieIcfgContainer [2019-10-22 08:58:20,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:58:20,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:58:20,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:58:20,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:58:20,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:58:20" (1/3) ... [2019-10-22 08:58:20,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5e419b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:58:20, skipping insertion in model container [2019-10-22 08:58:20,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:20" (2/3) ... [2019-10-22 08:58:20,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5e419b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:58:20, skipping insertion in model container [2019-10-22 08:58:20,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:58:20" (3/3) ... [2019-10-22 08:58:20,628 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i5_o5-2.c [2019-10-22 08:58:20,637 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:58:20,643 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:58:20,655 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:58:20,673 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:58:20,673 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:58:20,673 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:58:20,673 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:58:20,673 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:58:20,674 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:58:20,674 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:58:20,674 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:58:20,688 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-10-22 08:58:20,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:58:20,692 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:20,693 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:20,694 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:20,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:20,699 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-10-22 08:58:20,707 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:20,708 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490914] [2019-10-22 08:58:20,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:20,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:20,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:58:20,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490914] [2019-10-22 08:58:20,847 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:58:20,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:58:20,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360379995] [2019-10-22 08:58:20,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:58:20,852 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:20,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:58:20,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:58:20,866 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-10-22 08:58:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:20,919 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-10-22 08:58:20,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:58:20,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-10-22 08:58:20,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:20,929 INFO L225 Difference]: With dead ends: 24 [2019-10-22 08:58:20,929 INFO L226 Difference]: Without dead ends: 14 [2019-10-22 08:58:20,931 INFO L600 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 [2019-10-22 08:58:20,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-22 08:58:20,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-22 08:58:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-22 08:58:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-22 08:58:20,971 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-10-22 08:58:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:20,972 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-22 08:58:20,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:58:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-22 08:58:20,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 08:58:20,973 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:20,973 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:20,974 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:20,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:20,974 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-10-22 08:58:20,975 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:20,975 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757379475] [2019-10-22 08:58:20,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:20,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:20,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:58:21,054 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757379475] [2019-10-22 08:58:21,054 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885160838] [2019-10-22 08:58:21,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:21,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:58:21,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:58:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:58:21,143 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:58:21,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-10-22 08:58:21,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290372149] [2019-10-22 08:58:21,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 08:58:21,145 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:21,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 08:58:21,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:58:21,152 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-10-22 08:58:21,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:21,201 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-10-22 08:58:21,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:58:21,209 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-10-22 08:58:21,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:21,210 INFO L225 Difference]: With dead ends: 21 [2019-10-22 08:58:21,210 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 08:58:21,210 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:58:21,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 08:58:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 08:58:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 08:58:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-22 08:58:21,215 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-10-22 08:58:21,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:21,215 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-22 08:58:21,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 08:58:21,216 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-22 08:58:21,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 08:58:21,216 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:21,216 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:21,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:21,418 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:21,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:21,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-10-22 08:58:21,418 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:21,418 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717195001] [2019-10-22 08:58:21,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:21,419 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:21,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 08:58:21,565 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717195001] [2019-10-22 08:58:21,565 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396028484] [2019-10-22 08:58:21,565 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:21,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:58:21,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:58:21,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:58:21,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:58:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 08:58:21,638 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:58:21,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-10-22 08:58:21,638 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691764457] [2019-10-22 08:58:21,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 08:58:21,639 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:21,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 08:58:21,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:58:21,639 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2019-10-22 08:58:21,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:21,708 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-10-22 08:58:21,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:58:21,710 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-10-22 08:58:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:21,710 INFO L225 Difference]: With dead ends: 24 [2019-10-22 08:58:21,710 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 08:58:21,711 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:58:21,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 08:58:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-22 08:58:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 08:58:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-22 08:58:21,718 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-10-22 08:58:21,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:21,718 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-22 08:58:21,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 08:58:21,718 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-22 08:58:21,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 08:58:21,719 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:21,719 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:21,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:21,921 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:21,921 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-10-22 08:58:21,922 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:21,922 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006410689] [2019-10-22 08:58:21,922 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:21,922 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:21,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 08:58:22,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006410689] [2019-10-22 08:58:22,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309359893] [2019-10-22 08:58:22,075 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:22,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 08:58:22,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:58:22,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 08:58:22,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:58:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 08:58:22,146 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:58:22,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2019-10-22 08:58:22,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151892906] [2019-10-22 08:58:22,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 08:58:22,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:22,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 08:58:22,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:58:22,148 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2019-10-22 08:58:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:22,233 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-10-22 08:58:22,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:58:22,233 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-10-22 08:58:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:22,234 INFO L225 Difference]: With dead ends: 27 [2019-10-22 08:58:22,234 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 08:58:22,235 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:58:22,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 08:58:22,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-22 08:58:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 08:58:22,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-22 08:58:22,239 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-10-22 08:58:22,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:22,239 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-22 08:58:22,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 08:58:22,239 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-22 08:58:22,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 08:58:22,240 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:22,240 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:22,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:22,441 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:22,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:22,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-10-22 08:58:22,441 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:22,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937727834] [2019-10-22 08:58:22,442 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:22,442 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:22,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-22 08:58:22,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937727834] [2019-10-22 08:58:22,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917947121] [2019-10-22 08:58:22,601 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:22,631 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:58:22,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:58:22,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 08:58:22,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:58:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-22 08:58:22,676 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:58:22,677 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-10-22 08:58:22,677 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941794145] [2019-10-22 08:58:22,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 08:58:22,678 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:22,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 08:58:22,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-22 08:58:22,680 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 11 states. [2019-10-22 08:58:22,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:22,814 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-10-22 08:58:22,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 08:58:22,815 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2019-10-22 08:58:22,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:22,816 INFO L225 Difference]: With dead ends: 30 [2019-10-22 08:58:22,816 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 08:58:22,816 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-10-22 08:58:22,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 08:58:22,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-22 08:58:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 08:58:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-10-22 08:58:22,825 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-10-22 08:58:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:22,825 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-10-22 08:58:22,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 08:58:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-10-22 08:58:22,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 08:58:22,826 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:22,826 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:23,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:23,034 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:23,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:23,034 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-10-22 08:58:23,035 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:23,035 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800629842] [2019-10-22 08:58:23,035 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:23,035 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:23,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-22 08:58:23,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800629842] [2019-10-22 08:58:23,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612264182] [2019-10-22 08:58:23,336 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:23,382 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-22 08:58:23,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:58:23,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-22 08:58:23,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:58:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-22 08:58:23,441 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:58:23,442 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2019-10-22 08:58:23,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612372181] [2019-10-22 08:58:23,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 08:58:23,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:23,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 08:58:23,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-22 08:58:23,443 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 15 states. [2019-10-22 08:58:23,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:23,534 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-10-22 08:58:23,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-22 08:58:23,535 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2019-10-22 08:58:23,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:23,536 INFO L225 Difference]: With dead ends: 33 [2019-10-22 08:58:23,536 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 08:58:23,536 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-22 08:58:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 08:58:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 08:58:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 08:58:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-10-22 08:58:23,541 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-10-22 08:58:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:23,541 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-10-22 08:58:23,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 08:58:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-10-22 08:58:23,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-22 08:58:23,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:23,543 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:23,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:23,743 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:23,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:23,744 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-10-22 08:58:23,744 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:23,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805761484] [2019-10-22 08:58:23,744 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:23,744 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:23,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-22 08:58:23,915 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805761484] [2019-10-22 08:58:23,915 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800376679] [2019-10-22 08:58:23,915 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:23,950 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-22 08:58:23,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:58:23,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 08:58:23,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:58:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-22 08:58:23,995 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 08:58:23,995 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 13 [2019-10-22 08:58:23,995 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66822350] [2019-10-22 08:58:23,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 08:58:23,996 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 08:58:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:58:23,997 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2019-10-22 08:58:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:24,096 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-10-22 08:58:24,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 08:58:24,097 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2019-10-22 08:58:24,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:24,098 INFO L225 Difference]: With dead ends: 29 [2019-10-22 08:58:24,098 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 08:58:24,098 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-10-22 08:58:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 08:58:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 08:58:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 08:58:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 08:58:24,099 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2019-10-22 08:58:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:24,100 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:58:24,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 08:58:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 08:58:24,100 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 08:58:24,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:24,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 08:58:24,340 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 08:58:24,340 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 08:58:24,340 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 08:58:24,340 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-10-22 08:58:24,341 INFO L443 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2019-10-22 08:58:24,341 INFO L443 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2019-10-22 08:58:24,341 INFO L439 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~input~0) (<= ULTIMATE.start_main_~input~0 5)) [2019-10-22 08:58:24,341 INFO L443 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-10-22 08:58:24,341 INFO L443 ceAbstractionStarter]: For program point L9(lines 9 15) no Hoare annotation was computed. [2019-10-22 08:58:24,342 INFO L443 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2019-10-22 08:58:24,342 INFO L443 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2019-10-22 08:58:24,342 INFO L446 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2019-10-22 08:58:24,342 INFO L439 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2019-10-22 08:58:24,342 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-22 08:58:24,342 INFO L443 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-10-22 08:58:24,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:58:24 BoogieIcfgContainer [2019-10-22 08:58:24,349 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:58:24,354 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:58:24,354 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:58:24,355 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:58:24,355 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:58:20" (3/4) ... [2019-10-22 08:58:24,359 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 08:58:24,366 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-10-22 08:58:24,368 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-10-22 08:58:24,369 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 08:58:24,400 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_0b0640aa-2054-4aca-bb2d-02eaae1dab2c/bin/uautomizer/witness.graphml [2019-10-22 08:58:24,401 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:58:24,402 INFO L168 Benchmark]: Toolchain (without parser) took 4328.19 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 224.4 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -263.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:58:24,403 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:58:24,403 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -207.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:24,403 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.53 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:58:24,404 INFO L168 Benchmark]: Boogie Preprocessor took 14.88 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:58:24,404 INFO L168 Benchmark]: RCFGBuilder took 203.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:24,404 INFO L168 Benchmark]: TraceAbstraction took 3736.29 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 66.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -77.3 MB). Peak memory consumption was 325.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:24,405 INFO L168 Benchmark]: Witness Printer took 46.44 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:24,406 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 294.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -207.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.53 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.88 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 203.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3736.29 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 66.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -77.3 MB). Peak memory consumption was 325.8 MB. Max. memory is 11.5 GB. * Witness Printer took 46.44 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 3.6s, OverallIterations: 7, TraceHistogramMax: 7, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 86 SDtfs, 93 SDslu, 386 SDs, 0 SdLazy, 269 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 301 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 369 NumberOfCodeBlocks, 364 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 356 ConstructedInterpolants, 0 QuantifiedInterpolants, 31888 SizeOfPredicates, 27 NumberOfNonLiveVariables, 412 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 396/588 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...