./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/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 9918b49e0d76e4ce36b6a6760021b33460a8ae9b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/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 9918b49e0d76e4ce36b6a6760021b33460a8ae9b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: translation of (bvmul (_ BitVec 32) (_ BitVec 32) (_ BitVec 32)) not yet implemented, please contact Matthias --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 09:18:38,723 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 09:18:38,723 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 09:18:38,729 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 09:18:38,730 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 09:18:38,730 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 09:18:38,731 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 09:18:38,732 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 09:18:38,733 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 09:18:38,734 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 09:18:38,734 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 09:18:38,735 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 09:18:38,736 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 09:18:38,736 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 09:18:38,737 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 09:18:38,737 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 09:18:38,737 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 09:18:38,738 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 09:18:38,740 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 09:18:38,741 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 09:18:38,741 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 09:18:38,742 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 09:18:38,744 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 09:18:38,744 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 09:18:38,744 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 09:18:38,745 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 09:18:38,745 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 09:18:38,746 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 09:18:38,746 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 09:18:38,746 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 09:18:38,747 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 09:18:38,747 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 09:18:38,747 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 09:18:38,747 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 09:18:38,748 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 09:18:38,749 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 09:18:38,749 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 09:18:38,756 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 09:18:38,756 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 09:18:38,757 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 09:18:38,757 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 09:18:38,757 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 09:18:38,757 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 09:18:38,757 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 09:18:38,757 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 09:18:38,757 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 09:18:38,757 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 09:18:38,758 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 09:18:38,758 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 09:18:38,758 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 09:18:38,758 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 09:18:38,758 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 09:18:38,759 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 09:18:38,759 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 09:18:38,759 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 09:18:38,759 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 09:18:38,759 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 09:18:38,761 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 09:18:38,761 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 09:18:38,761 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 09:18:38,761 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 09:18:38,761 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 09:18:38,762 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 09:18:38,762 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 09:18:38,762 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 09:18:38,762 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 09:18:38,762 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 09:18:38,762 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 09:18:38,762 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 09:18:38,763 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 09:18:38,763 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 09:18:38,763 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 09:18:38,763 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 09:18:38,763 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 09:18:38,763 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_a98527ca-1ddc-4996-94c8-469a2403afce/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 -> 9918b49e0d76e4ce36b6a6760021b33460a8ae9b [2018-11-18 09:18:38,785 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 09:18:38,792 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 09:18:38,794 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 09:18:38,795 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 09:18:38,795 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 09:18:38,796 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/../../sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-11-18 09:18:38,830 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/data/5e9472aa9/308e548f7ae04bd7b6e2b47b4a5a2c4e/FLAG58a7ee893 [2018-11-18 09:18:39,218 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 09:18:39,219 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-11-18 09:18:39,223 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/data/5e9472aa9/308e548f7ae04bd7b6e2b47b4a5a2c4e/FLAG58a7ee893 [2018-11-18 09:18:39,231 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/data/5e9472aa9/308e548f7ae04bd7b6e2b47b4a5a2c4e [2018-11-18 09:18:39,233 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 09:18:39,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 09:18:39,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 09:18:39,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 09:18:39,237 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 09:18:39,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:18:39" (1/1) ... [2018-11-18 09:18:39,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f35898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:18:39, skipping insertion in model container [2018-11-18 09:18:39,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:18:39" (1/1) ... [2018-11-18 09:18:39,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 09:18:39,258 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 09:18:39,362 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:18:39,364 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 09:18:39,374 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:18:39,381 INFO L195 MainTranslator]: Completed translation [2018-11-18 09:18:39,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:18:39 WrapperNode [2018-11-18 09:18:39,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 09:18:39,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 09:18:39,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 09:18:39,382 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 09:18:39,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:18:39" (1/1) ... [2018-11-18 09:18:39,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:18:39" (1/1) ... [2018-11-18 09:18:39,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 09:18:39,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 09:18:39,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 09:18:39,395 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 09:18:39,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:18:39" (1/1) ... [2018-11-18 09:18:39,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:18:39" (1/1) ... [2018-11-18 09:18:39,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:18:39" (1/1) ... [2018-11-18 09:18:39,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:18:39" (1/1) ... [2018-11-18 09:18:39,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:18:39" (1/1) ... [2018-11-18 09:18:39,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:18:39" (1/1) ... [2018-11-18 09:18:39,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:18:39" (1/1) ... [2018-11-18 09:18:39,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 09:18:39,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 09:18:39,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 09:18:39,408 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 09:18:39,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:18:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 09:18:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 09:18:39,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 09:18:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 09:18:39,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 09:18:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 09:18:39,489 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 09:18:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 09:18:39,489 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 09:18:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2018-11-18 09:18:39,489 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2018-11-18 09:18:39,616 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 09:18:39,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:18:39 BoogieIcfgContainer [2018-11-18 09:18:39,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 09:18:39,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 09:18:39,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 09:18:39,621 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 09:18:39,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:18:39" (1/3) ... [2018-11-18 09:18:39,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0e8d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:18:39, skipping insertion in model container [2018-11-18 09:18:39,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:18:39" (2/3) ... [2018-11-18 09:18:39,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0e8d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:18:39, skipping insertion in model container [2018-11-18 09:18:39,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:18:39" (3/3) ... [2018-11-18 09:18:39,625 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-11-18 09:18:39,630 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 09:18:39,635 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 09:18:39,645 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 09:18:39,665 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 09:18:39,665 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 09:18:39,665 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 09:18:39,665 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 09:18:39,665 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 09:18:39,666 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 09:18:39,666 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 09:18:39,666 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 09:18:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2018-11-18 09:18:39,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 09:18:39,683 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:18:39,684 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:18:39,685 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:18:39,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:18:39,689 INFO L82 PathProgramCache]: Analyzing trace with hash -17810400, now seen corresponding path program 1 times [2018-11-18 09:18:39,691 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:18:39,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:39,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:39,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:39,720 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:18:39,745 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 09:18:39,746 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 09:18:39,746 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 09:18:39,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:39,765 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 09:18:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:18:39,801 INFO L190 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-11-18 09:18:39,802 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 09:18:39,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:18:39,803 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:18:39,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:39,811 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 09:18:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:18:39,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:18:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:18:39,898 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:18:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:18:40,018 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:18:40,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2018-11-18 09:18:40,018 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:18:40,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:18:40,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:18:40,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-18 09:18:40,032 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2018-11-18 09:18:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:18:40,107 INFO L93 Difference]: Finished difference Result 63 states and 84 transitions. [2018-11-18 09:18:40,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:18:40,108 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-11-18 09:18:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:18:40,115 INFO L225 Difference]: With dead ends: 63 [2018-11-18 09:18:40,115 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 09:18:40,118 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-18 09:18:40,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 09:18:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2018-11-18 09:18:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 09:18:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2018-11-18 09:18:40,144 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2018-11-18 09:18:40,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:18:40,145 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2018-11-18 09:18:40,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:18:40,145 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2018-11-18 09:18:40,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 09:18:40,146 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:18:40,146 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:18:40,146 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:18:40,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:18:40,147 INFO L82 PathProgramCache]: Analyzing trace with hash -410837410, now seen corresponding path program 1 times [2018-11-18 09:18:40,147 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:18:40,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:40,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:40,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:40,148 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:18:40,153 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 09:18:40,153 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 09:18:40,154 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/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 [2018-11-18 09:18:40,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:40,160 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 09:18:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:18:40,182 INFO L190 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-11-18 09:18:40,182 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 09:18:40,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:18:40,183 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/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 [2018-11-18 09:18:40,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:40,189 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 09:18:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:18:40,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:18:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:18:40,213 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:18:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:18:40,283 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:18:40,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2018-11-18 09:18:40,284 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:18:40,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:18:40,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:18:40,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-18 09:18:40,285 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2018-11-18 09:18:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:18:40,311 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2018-11-18 09:18:40,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:18:40,311 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-11-18 09:18:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:18:40,312 INFO L225 Difference]: With dead ends: 44 [2018-11-18 09:18:40,312 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 09:18:40,313 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-18 09:18:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 09:18:40,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2018-11-18 09:18:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 09:18:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2018-11-18 09:18:40,316 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2018-11-18 09:18:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:18:40,316 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2018-11-18 09:18:40,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:18:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2018-11-18 09:18:40,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 09:18:40,316 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:18:40,316 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:18:40,317 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:18:40,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:18:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash 426459746, now seen corresponding path program 1 times [2018-11-18 09:18:40,317 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:18:40,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:40,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:40,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:40,318 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:18:40,323 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 09:18:40,323 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 09:18:40,323 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/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 [2018-11-18 09:18:40,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:40,329 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 09:18:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:18:40,350 INFO L190 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-11-18 09:18:40,350 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 09:18:40,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:18:40,350 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:18:40,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:40,356 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 09:18:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:18:40,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:18:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:18:40,379 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:18:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:18:40,435 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:18:40,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2018-11-18 09:18:40,435 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:18:40,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:18:40,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:18:40,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-18 09:18:40,436 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2018-11-18 09:18:40,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:18:40,466 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2018-11-18 09:18:40,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:18:40,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-18 09:18:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:18:40,467 INFO L225 Difference]: With dead ends: 49 [2018-11-18 09:18:40,467 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 09:18:40,468 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-18 09:18:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 09:18:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2018-11-18 09:18:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 09:18:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2018-11-18 09:18:40,471 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2018-11-18 09:18:40,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:18:40,471 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2018-11-18 09:18:40,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:18:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2018-11-18 09:18:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 09:18:40,472 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:18:40,472 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:18:40,472 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:18:40,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:18:40,473 INFO L82 PathProgramCache]: Analyzing trace with hash 684625184, now seen corresponding path program 1 times [2018-11-18 09:18:40,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:18:40,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:40,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:40,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:40,473 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:18:40,478 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 09:18:40,478 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 09:18:40,478 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 09:18:40,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:40,488 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 09:18:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:18:40,523 INFO L190 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-11-18 09:18:40,523 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 09:18:40,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:18:40,523 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:18:40,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:40,529 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 09:18:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:18:40,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:18:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:18:40,585 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:18:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:18:40,648 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:18:40,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2018-11-18 09:18:40,649 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:18:40,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:18:40,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:18:40,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-18 09:18:40,649 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2018-11-18 09:18:40,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:18:40,668 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2018-11-18 09:18:40,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:18:40,668 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-18 09:18:40,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:18:40,669 INFO L225 Difference]: With dead ends: 42 [2018-11-18 09:18:40,669 INFO L226 Difference]: Without dead ends: 29 [2018-11-18 09:18:40,670 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-18 09:18:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-18 09:18:40,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-11-18 09:18:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-18 09:18:40,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2018-11-18 09:18:40,674 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2018-11-18 09:18:40,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:18:40,674 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2018-11-18 09:18:40,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:18:40,675 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2018-11-18 09:18:40,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 09:18:40,675 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:18:40,675 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:18:40,676 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:18:40,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:18:40,676 INFO L82 PathProgramCache]: Analyzing trace with hash 346054296, now seen corresponding path program 1 times [2018-11-18 09:18:40,676 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:18:40,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:40,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:40,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:40,677 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:18:40,680 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 09:18:40,680 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 09:18:40,680 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 09:18:40,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:40,690 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 09:18:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:18:40,708 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-11-18 09:18:40,710 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [12], [15], [17], [23], [28], [34], [39], [43], [47], [49], [54], [59], [60], [61], [62], [63], [65], [66], [67] [2018-11-18 09:18:40,732 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 09:18:40,732 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 09:18:40,816 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 09:18:40,817 INFO L272 AbstractInterpreter]: Visited 14 different actions 14 times. Never merged. Never widened. Performed 24 root evaluator evaluations with a maximum evaluation depth of 4. Performed 24 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 5 variables. [2018-11-18 09:18:40,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:18:40,821 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 09:18:40,854 INFO L227 lantSequenceWeakener]: Weakened 8 states. On average, predicates are now at 50% of their original sizes. [2018-11-18 09:18:40,854 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 09:18:40,880 INFO L415 sIntCurrentIteration]: We unified 22 AI predicates to 22 [2018-11-18 09:18:40,880 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 09:18:40,881 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:18:40,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 09:18:40,881 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:18:40,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:18:40,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:18:40,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 09:18:40,882 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2018-11-18 09:18:40,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:18:40,938 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2018-11-18 09:18:40,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:18:40,938 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-11-18 09:18:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:18:40,939 INFO L225 Difference]: With dead ends: 48 [2018-11-18 09:18:40,939 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 09:18:40,939 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:18:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 09:18:40,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-11-18 09:18:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-18 09:18:40,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2018-11-18 09:18:40,943 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2018-11-18 09:18:40,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:18:40,943 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2018-11-18 09:18:40,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:18:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2018-11-18 09:18:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 09:18:40,944 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:18:40,944 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:18:40,944 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:18:40,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:18:40,944 INFO L82 PathProgramCache]: Analyzing trace with hash -424941854, now seen corresponding path program 1 times [2018-11-18 09:18:40,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:18:40,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:40,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:40,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:40,945 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:18:40,949 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 09:18:40,949 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 09:18:40,949 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 09:18:40,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:40,955 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 09:18:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:18:40,973 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-11-18 09:18:40,973 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [12], [15], [17], [23], [28], [34], [39], [43], [47], [49], [52], [54], [59], [60], [61], [62], [63], [65], [66], [67] [2018-11-18 09:18:40,974 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 09:18:40,974 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 09:18:41,071 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 09:18:41,071 INFO L272 AbstractInterpreter]: Visited 23 different actions 56 times. Merged at 9 different actions 20 times. Widened at 1 different actions 1 times. Performed 160 root evaluator evaluations with a maximum evaluation depth of 11. Performed 160 inverse root evaluator evaluations with a maximum inverse evaluation depth of 11. Found 5 fixpoints after 2 different actions. Largest state had 5 variables. [2018-11-18 09:18:41,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:18:41,091 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 09:18:41,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:18:41,092 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:18:41,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:41,109 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 09:18:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:18:41,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:18:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:18:41,171 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:18:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:18:43,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:18:43,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2018-11-18 09:18:43,306 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 09:18:43,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 09:18:43,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 09:18:43,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-11-18 09:18:43,307 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 11 states. [2018-11-18 09:18:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:18:43,377 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2018-11-18 09:18:43,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 09:18:43,379 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-11-18 09:18:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:18:43,380 INFO L225 Difference]: With dead ends: 54 [2018-11-18 09:18:43,380 INFO L226 Difference]: Without dead ends: 35 [2018-11-18 09:18:43,380 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-11-18 09:18:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-18 09:18:43,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-11-18 09:18:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-18 09:18:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-11-18 09:18:43,385 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2018-11-18 09:18:43,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:18:43,385 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-11-18 09:18:43,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 09:18:43,386 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-11-18 09:18:43,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-18 09:18:43,386 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:18:43,386 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:18:43,387 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:18:43,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:18:43,387 INFO L82 PathProgramCache]: Analyzing trace with hash 313852504, now seen corresponding path program 2 times [2018-11-18 09:18:43,387 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:18:43,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:43,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:43,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:43,388 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:18:43,394 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 09:18:43,394 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 09:18:43,394 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 09:18:43,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:18:43,413 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 09:18:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:18:43,433 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 09:18:43,434 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 09:18:43,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:18:43,434 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:18:43,440 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 09:18:43,440 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 09:18:43,449 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-18 09:18:43,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:18:43,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:18:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:18:43,498 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:18:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:18:43,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:18:43,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-11-18 09:18:43,704 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 09:18:43,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 09:18:43,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 09:18:43,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2018-11-18 09:18:43,705 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 14 states. [2018-11-18 09:18:43,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:18:43,955 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2018-11-18 09:18:43,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 09:18:43,956 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2018-11-18 09:18:43,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:18:43,956 INFO L225 Difference]: With dead ends: 57 [2018-11-18 09:18:43,957 INFO L226 Difference]: Without dead ends: 38 [2018-11-18 09:18:43,957 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-11-18 09:18:43,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-18 09:18:43,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-11-18 09:18:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-18 09:18:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2018-11-18 09:18:43,961 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2018-11-18 09:18:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:18:43,961 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2018-11-18 09:18:43,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 09:18:43,961 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2018-11-18 09:18:43,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 09:18:43,962 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:18:43,962 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:18:43,962 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:18:43,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:18:43,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1970820318, now seen corresponding path program 3 times [2018-11-18 09:18:43,962 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:18:43,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:43,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:18:43,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:43,963 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:18:43,969 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 09:18:43,969 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 09:18:43,969 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 09:18:43,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:18:43,987 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 09:18:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:18:44,008 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 09:18:44,008 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 09:18:44,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:18:44,008 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:18:44,014 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 09:18:44,014 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 09:18:44,022 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 09:18:44,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:18:44,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:18:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:18:44,071 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:18:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:18:44,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:18:44,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-11-18 09:18:44,310 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 09:18:44,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 09:18:44,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 09:18:44,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2018-11-18 09:18:44,311 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 16 states. [2018-11-18 09:18:44,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:18:44,800 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2018-11-18 09:18:44,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 09:18:44,800 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2018-11-18 09:18:44,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:18:44,801 INFO L225 Difference]: With dead ends: 60 [2018-11-18 09:18:44,801 INFO L226 Difference]: Without dead ends: 41 [2018-11-18 09:18:44,801 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2018-11-18 09:18:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-18 09:18:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-11-18 09:18:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-18 09:18:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2018-11-18 09:18:44,806 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2018-11-18 09:18:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:18:44,806 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2018-11-18 09:18:44,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 09:18:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2018-11-18 09:18:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-18 09:18:44,807 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:18:44,807 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:18:44,807 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:18:44,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:18:44,807 INFO L82 PathProgramCache]: Analyzing trace with hash 971729238, now seen corresponding path program 4 times [2018-11-18 09:18:44,808 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:18:44,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:44,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:18:44,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:18:44,809 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:18:44,812 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 09:18:44,812 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 09:18:44,813 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 09:18:44,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:44,826 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 09:18:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:18:44,856 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 09:18:44,856 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 09:18:44,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:18:44,857 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:18:44,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:18:44,866 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 09:18:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:18:44,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:18:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 09:18:44,947 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:18:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 09:18:48,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:18:48,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-11-18 09:18:48,506 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 09:18:48,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-18 09:18:48,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-18 09:18:48,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2018-11-18 09:18:48,506 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 22 states. [2018-11-18 09:19:08,673 WARN L180 SmtUtils]: Spent 6.41 s on a formula simplification that was a NOOP. DAG size: 33 [2018-11-18 09:19:17,081 WARN L180 SmtUtils]: Spent 8.39 s on a formula simplification that was a NOOP. DAG size: 36 [2018-11-18 09:19:17,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:19:17,256 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2018-11-18 09:19:17,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 09:19:17,256 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2018-11-18 09:19:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:19:17,257 INFO L225 Difference]: With dead ends: 60 [2018-11-18 09:19:17,257 INFO L226 Difference]: Without dead ends: 57 [2018-11-18 09:19:17,258 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=90, Invalid=665, Unknown=1, NotChecked=0, Total=756 [2018-11-18 09:19:17,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-18 09:19:17,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-18 09:19:17,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-18 09:19:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2018-11-18 09:19:17,263 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 35 [2018-11-18 09:19:17,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:19:17,263 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2018-11-18 09:19:17,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-18 09:19:17,263 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2018-11-18 09:19:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-18 09:19:17,264 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:19:17,264 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:19:17,264 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:19:17,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:19:17,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1100809372, now seen corresponding path program 5 times [2018-11-18 09:19:17,265 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:19:17,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:19:17,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:19:17,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:19:17,266 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:19:17,271 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 09:19:17,272 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 09:19:17,272 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 09:19:17,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:19:17,278 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 09:19:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:19:17,296 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 09:19:17,296 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 09:19:17,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:19:17,296 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:19:17,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 09:19:17,304 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 09:19:17,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-18 09:19:17,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:19:17,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:19:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:19:17,406 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:19:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:19:18,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:19:18,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-11-18 09:19:18,870 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 09:19:18,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 09:19:18,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 09:19:18,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=318, Unknown=1, NotChecked=0, Total=380 [2018-11-18 09:19:18,871 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 20 states. [2018-11-18 09:19:27,953 WARN L180 SmtUtils]: Spent 8.16 s on a formula simplification that was a NOOP. DAG size: 43 [2018-11-18 09:19:32,611 WARN L180 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2018-11-18 09:19:43,722 WARN L180 SmtUtils]: Spent 11.02 s on a formula simplification. DAG size of input: 67 DAG size of output: 19 [2018-11-18 09:19:53,967 WARN L180 SmtUtils]: Spent 10.15 s on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2018-11-18 09:20:10,872 WARN L180 SmtUtils]: Spent 15.63 s on a formula simplification. DAG size of input: 69 DAG size of output: 24 [2018-11-18 09:20:13,423 WARN L180 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2018-11-18 09:20:52,132 WARN L180 SmtUtils]: Spent 30.83 s on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2018-11-18 09:21:01,473 WARN L180 SmtUtils]: Spent 7.25 s on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2018-11-18 09:21:20,866 WARN L180 SmtUtils]: Spent 5.13 s on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2018-11-18 09:21:21,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:21:21,330 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2018-11-18 09:21:21,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-18 09:21:21,331 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-11-18 09:21:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:21:21,332 INFO L225 Difference]: With dead ends: 94 [2018-11-18 09:21:21,332 INFO L226 Difference]: Without dead ends: 81 [2018-11-18 09:21:21,332 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 109.4s TimeCoverageRelationStatistics Valid=173, Invalid=751, Unknown=6, NotChecked=0, Total=930 [2018-11-18 09:21:21,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-18 09:21:21,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2018-11-18 09:21:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-18 09:21:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2018-11-18 09:21:21,342 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 38 [2018-11-18 09:21:21,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:21:21,342 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2018-11-18 09:21:21,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 09:21:21,342 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2018-11-18 09:21:21,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-18 09:21:21,343 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:21:21,343 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:21:21,343 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:21:21,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:21:21,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1481976096, now seen corresponding path program 6 times [2018-11-18 09:21:21,345 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:21:21,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:21,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:21:21,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:21,346 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:21:21,352 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 09:21:21,352 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 09:21:21,352 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 09:21:21,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:21:21,372 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 09:21:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:21:21,391 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 09:21:21,391 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 09:21:21,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:21:21,391 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:21:21,400 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 09:21:21,400 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 09:21:21,408 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 09:21:21,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:21:21,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:21:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 09:21:21,445 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:21:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 09:21:21,477 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:21:21,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2018-11-18 09:21:21,477 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:21:21,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 09:21:21,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 09:21:21,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 09:21:21,479 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 3 states. [2018-11-18 09:21:21,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:21:21,490 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2018-11-18 09:21:21,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 09:21:21,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2018-11-18 09:21:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:21:21,491 INFO L225 Difference]: With dead ends: 94 [2018-11-18 09:21:21,491 INFO L226 Difference]: Without dead ends: 81 [2018-11-18 09:21:21,491 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 09:21:21,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-18 09:21:21,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2018-11-18 09:21:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-18 09:21:21,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2018-11-18 09:21:21,499 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 38 [2018-11-18 09:21:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:21:21,499 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2018-11-18 09:21:21,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 09:21:21,499 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2018-11-18 09:21:21,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-18 09:21:21,500 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:21:21,500 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:21:21,500 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:21:21,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:21:21,500 INFO L82 PathProgramCache]: Analyzing trace with hash 359934615, now seen corresponding path program 1 times [2018-11-18 09:21:21,500 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:21:21,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:21,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:21:21,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:21,501 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:21:21,506 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 09:21:21,506 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 09:21:21,506 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 09:21:21,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:21:21,521 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 09:21:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:21:21,545 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 41 with the following transitions: [2018-11-18 09:21:21,545 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [12], [15], [17], [20], [22], [23], [28], [34], [39], [43], [47], [49], [52], [54], [59], [60], [61], [62], [63], [65], [66], [67], [68], [69] [2018-11-18 09:21:21,547 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 09:21:21,547 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 09:21:21,623 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 09:21:21,624 INFO L272 AbstractInterpreter]: Visited 27 different actions 74 times. Merged at 10 different actions 21 times. Widened at 1 different actions 1 times. Performed 182 root evaluator evaluations with a maximum evaluation depth of 11. Performed 182 inverse root evaluator evaluations with a maximum inverse evaluation depth of 11. Found 5 fixpoints after 2 different actions. Largest state had 5 variables. [2018-11-18 09:21:21,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:21:21,628 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 09:21:21,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:21:21,628 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:21:21,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:21:21,641 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 09:21:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:21:21,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:21:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 09:21:21,949 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:21:35,028 WARN L180 SmtUtils]: Spent 1.98 s on a formula simplification that was a NOOP. DAG size: 23 [2018-11-18 09:21:39,622 WARN L180 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 23 [2018-11-18 09:21:47,055 WARN L180 SmtUtils]: Spent 4.27 s on a formula simplification that was a NOOP. DAG size: 22 [2018-11-18 09:21:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 09:21:47,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:21:47,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2018-11-18 09:21:47,078 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 09:21:47,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-18 09:21:47,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-18 09:21:47,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=577, Unknown=6, NotChecked=0, Total=650 [2018-11-18 09:21:47,079 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand 26 states. [2018-11-18 09:23:04,914 WARN L180 SmtUtils]: Spent 23.59 s on a formula simplification that was a NOOP. DAG size: 45 [2018-11-18 09:23:31,297 WARN L180 SmtUtils]: Spent 25.83 s on a formula simplification that was a NOOP. DAG size: 48 [2018-11-18 09:23:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:34,819 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2018-11-18 09:23:34,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 09:23:34,820 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 40 [2018-11-18 09:23:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:34,820 INFO L225 Difference]: With dead ends: 80 [2018-11-18 09:23:34,820 INFO L226 Difference]: Without dead ends: 64 [2018-11-18 09:23:34,821 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 76.4s TimeCoverageRelationStatistics Valid=114, Invalid=872, Unknown=6, NotChecked=0, Total=992 [2018-11-18 09:23:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-18 09:23:34,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-11-18 09:23:34,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-18 09:23:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2018-11-18 09:23:34,828 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 40 [2018-11-18 09:23:34,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:34,828 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2018-11-18 09:23:34,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-18 09:23:34,829 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2018-11-18 09:23:34,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-18 09:23:34,829 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:34,829 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:34,830 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:34,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:34,830 INFO L82 PathProgramCache]: Analyzing trace with hash -659809836, now seen corresponding path program 7 times [2018-11-18 09:23:34,830 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:23:34,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:34,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:34,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:34,831 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:23:34,840 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 09:23:34,840 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 09:23:34,841 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 09:23:34,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:34,848 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 09:23:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:34,867 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 09:23:34,867 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 09:23:34,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:34,867 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:23:34,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:34,873 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 09:23:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:34,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 09:23:34,937 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:23:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 40 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 09:23:35,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:23:35,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-11-18 09:23:35,337 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 09:23:35,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 09:23:35,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 09:23:35,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2018-11-18 09:23:35,338 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 16 states. [2018-11-18 09:23:35,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:35,994 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2018-11-18 09:23:35,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 09:23:35,995 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2018-11-18 09:23:35,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:35,995 INFO L225 Difference]: With dead ends: 82 [2018-11-18 09:23:35,996 INFO L226 Difference]: Without dead ends: 46 [2018-11-18 09:23:35,996 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2018-11-18 09:23:35,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-18 09:23:36,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-11-18 09:23:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-18 09:23:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2018-11-18 09:23:36,005 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 41 [2018-11-18 09:23:36,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:36,006 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2018-11-18 09:23:36,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 09:23:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2018-11-18 09:23:36,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-18 09:23:36,006 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:36,006 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:36,007 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:36,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:36,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1237040488, now seen corresponding path program 8 times [2018-11-18 09:23:36,007 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:23:36,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:36,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:36,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:36,008 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:23:36,013 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 09:23:36,013 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 09:23:36,013 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 09:23:36,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:23:36,020 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 09:23:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:36,041 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 09:23:36,041 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 09:23:36,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:36,041 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:23:36,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 09:23:36,050 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 09:23:36,065 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-18 09:23:36,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:23:36,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 09:23:36,671 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:23:41,948 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((v_prenex_8 Int)) (= |c_gcd_test_#in~b| (* 5 v_prenex_8))) (forall ((gcd_test_~a Int)) (not (= (* 2 |c_gcd_test_#in~b|) (* 5 gcd_test_~a))))) is different from true [2018-11-18 09:23:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 09:23:41,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:23:41,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2018-11-18 09:23:41,969 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 09:23:41,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 09:23:41,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 09:23:41,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=167, Unknown=7, NotChecked=26, Total=240 [2018-11-18 09:23:41,970 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 16 states. [2018-11-18 09:23:43,533 WARN L180 SmtUtils]: Spent 792.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-18 09:23:46,581 WARN L180 SmtUtils]: Spent 2.68 s on a formula simplification that was a NOOP. DAG size: 18 [2018-11-18 09:23:48,030 WARN L180 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 25 [2018-11-18 09:23:50,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:50,305 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2018-11-18 09:23:50,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 09:23:50,305 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2018-11-18 09:23:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:50,306 INFO L225 Difference]: With dead ends: 70 [2018-11-18 09:23:50,306 INFO L226 Difference]: Without dead ends: 57 [2018-11-18 09:23:50,306 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=74, Invalid=343, Unknown=7, NotChecked=38, Total=462 [2018-11-18 09:23:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-18 09:23:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2018-11-18 09:23:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-18 09:23:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2018-11-18 09:23:50,312 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 41 [2018-11-18 09:23:50,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:50,312 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2018-11-18 09:23:50,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 09:23:50,312 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2018-11-18 09:23:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-18 09:23:50,313 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:50,313 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:50,313 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:50,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:50,314 INFO L82 PathProgramCache]: Analyzing trace with hash 634225378, now seen corresponding path program 9 times [2018-11-18 09:23:50,314 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:23:50,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:50,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:23:50,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:50,314 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:23:50,319 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 09:23:50,320 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 09:23:50,320 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 09:23:50,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:23:50,326 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 09:23:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:50,345 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 09:23:50,345 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 09:23:50,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:50,345 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:23:50,351 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 09:23:50,351 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 09:23:50,371 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 09:23:50,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:23:50,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:52,176 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:23:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:57,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:23:57,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2018-11-18 09:23:57,724 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 09:23:57,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-18 09:23:57,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-18 09:23:57,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=471, Unknown=7, NotChecked=0, Total=552 [2018-11-18 09:23:57,725 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 24 states. [2018-11-18 09:24:07,972 WARN L180 SmtUtils]: Spent 10.12 s on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2018-11-18 09:24:10,542 WARN L180 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2018-11-18 09:24:14,445 WARN L180 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2018-11-18 09:24:27,015 WARN L180 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 75 DAG size of output: 28 [2018-11-18 09:25:27,956 WARN L180 SmtUtils]: Spent 54.82 s on a formula simplification. DAG size of input: 80 DAG size of output: 28 [2018-11-18 09:25:45,999 WARN L180 SmtUtils]: Spent 12.33 s on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2018-11-18 09:25:48,271 WARN L180 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-18 09:25:50,234 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2018-11-18 09:25:50,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 09:25:50,235 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:141) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:893) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:767) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:339) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:382) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:672) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:601) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 43 more [2018-11-18 09:25:50,238 INFO L168 Benchmark]: Toolchain (without parser) took 431004.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 959.2 MB in the beginning and 995.2 MB in the end (delta: -36.0 MB). Peak memory consumption was 111.4 MB. Max. memory is 11.5 GB. [2018-11-18 09:25:50,238 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:25:50,239 INFO L168 Benchmark]: CACSL2BoogieTranslator took 147.95 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 09:25:50,239 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.16 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:25:50,239 INFO L168 Benchmark]: Boogie Preprocessor took 13.33 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 09:25:50,239 INFO L168 Benchmark]: RCFGBuilder took 209.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.3 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -165.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 09:25:50,239 INFO L168 Benchmark]: TraceAbstraction took 430619.79 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 22.0 MB). Free memory was 1.1 GB in the beginning and 995.2 MB in the end (delta: 115.9 MB). Peak memory consumption was 137.9 MB. Max. memory is 11.5 GB. [2018-11-18 09:25:50,241 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 147.95 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 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 12.16 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.33 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 209.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.3 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -165.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 430619.79 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 22.0 MB). Free memory was 1.1 GB in the beginning and 995.2 MB in the end (delta: 115.9 MB). Peak memory consumption was 137.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-5842f4b [2018-11-18 09:25:51,439 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 09:25:51,440 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 09:25:51,449 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 09:25:51,449 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 09:25:51,450 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 09:25:51,451 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 09:25:51,452 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 09:25:51,453 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 09:25:51,453 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 09:25:51,454 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 09:25:51,454 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 09:25:51,455 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 09:25:51,456 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 09:25:51,457 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 09:25:51,457 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 09:25:51,458 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 09:25:51,459 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 09:25:51,460 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 09:25:51,462 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 09:25:51,462 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 09:25:51,463 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 09:25:51,465 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 09:25:51,465 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 09:25:51,465 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 09:25:51,465 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 09:25:51,466 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 09:25:51,467 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 09:25:51,467 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 09:25:51,468 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 09:25:51,468 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 09:25:51,468 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 09:25:51,469 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 09:25:51,469 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 09:25:51,469 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 09:25:51,470 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 09:25:51,470 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-11-18 09:25:51,480 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 09:25:51,480 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 09:25:51,481 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 09:25:51,481 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 09:25:51,481 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 09:25:51,481 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 09:25:51,481 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 09:25:51,482 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 09:25:51,482 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 09:25:51,482 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 09:25:51,482 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 09:25:51,482 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 09:25:51,483 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 09:25:51,483 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 09:25:51,483 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 09:25:51,483 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 09:25:51,483 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 09:25:51,485 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-18 09:25:51,485 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-18 09:25:51,485 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 09:25:51,485 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 09:25:51,485 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 09:25:51,485 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 09:25:51,485 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 09:25:51,486 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 09:25:51,486 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 09:25:51,486 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 09:25:51,486 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 09:25:51,486 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 09:25:51,486 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 09:25:51,486 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 09:25:51,487 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-11-18 09:25:51,487 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 09:25:51,487 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-18 09:25:51,487 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-18 09:25:51,487 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_a98527ca-1ddc-4996-94c8-469a2403afce/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 -> 9918b49e0d76e4ce36b6a6760021b33460a8ae9b [2018-11-18 09:25:51,517 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 09:25:51,526 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 09:25:51,529 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 09:25:51,530 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 09:25:51,530 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 09:25:51,531 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/../../sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-11-18 09:25:51,573 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/data/491ca9c00/055671856feb425abce32cd9368b9f03/FLAG7c0116bf2 [2018-11-18 09:25:51,966 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 09:25:51,967 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-11-18 09:25:51,970 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/data/491ca9c00/055671856feb425abce32cd9368b9f03/FLAG7c0116bf2 [2018-11-18 09:25:51,980 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/data/491ca9c00/055671856feb425abce32cd9368b9f03 [2018-11-18 09:25:51,982 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 09:25:51,983 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 09:25:51,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 09:25:51,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 09:25:51,986 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 09:25:51,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:25:51" (1/1) ... [2018-11-18 09:25:51,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cff242c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:51, skipping insertion in model container [2018-11-18 09:25:51,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:25:51" (1/1) ... [2018-11-18 09:25:51,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 09:25:52,012 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 09:25:52,126 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:25:52,129 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 09:25:52,140 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:25:52,150 INFO L195 MainTranslator]: Completed translation [2018-11-18 09:25:52,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:52 WrapperNode [2018-11-18 09:25:52,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 09:25:52,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 09:25:52,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 09:25:52,151 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 09:25:52,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:52" (1/1) ... [2018-11-18 09:25:52,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:52" (1/1) ... [2018-11-18 09:25:52,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 09:25:52,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 09:25:52,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 09:25:52,164 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 09:25:52,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:52" (1/1) ... [2018-11-18 09:25:52,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:52" (1/1) ... [2018-11-18 09:25:52,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:52" (1/1) ... [2018-11-18 09:25:52,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:52" (1/1) ... [2018-11-18 09:25:52,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:52" (1/1) ... [2018-11-18 09:25:52,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:52" (1/1) ... [2018-11-18 09:25:52,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:52" (1/1) ... [2018-11-18 09:25:52,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 09:25:52,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 09:25:52,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 09:25:52,180 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 09:25:52,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 09:25:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 09:25:52,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 09:25:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 09:25:52,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 09:25:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 09:25:52,259 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 09:25:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 09:25:52,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 09:25:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2018-11-18 09:25:52,259 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2018-11-18 09:25:52,378 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 09:25:52,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:25:52 BoogieIcfgContainer [2018-11-18 09:25:52,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 09:25:52,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 09:25:52,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 09:25:52,381 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 09:25:52,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:25:51" (1/3) ... [2018-11-18 09:25:52,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d88314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:25:52, skipping insertion in model container [2018-11-18 09:25:52,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:25:52" (2/3) ... [2018-11-18 09:25:52,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d88314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:25:52, skipping insertion in model container [2018-11-18 09:25:52,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:25:52" (3/3) ... [2018-11-18 09:25:52,384 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-11-18 09:25:52,392 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 09:25:52,399 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 09:25:52,408 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 09:25:52,432 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 09:25:52,433 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 09:25:52,433 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 09:25:52,433 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 09:25:52,433 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 09:25:52,433 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 09:25:52,433 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 09:25:52,433 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 09:25:52,433 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 09:25:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2018-11-18 09:25:52,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 09:25:52,449 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:25:52,449 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:25:52,450 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:25:52,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:25:52,454 INFO L82 PathProgramCache]: Analyzing trace with hash -17810400, now seen corresponding path program 1 times [2018-11-18 09:25:52,456 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:25:52,457 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/cvc4nyu Starting monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:25:52,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:25:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:25:52,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:25:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:52,634 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 09:25:52,637 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:25:52,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 09:25:52,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:25:52,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:25:52,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 09:25:52,649 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2018-11-18 09:25:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:25:52,718 INFO L93 Difference]: Finished difference Result 63 states and 84 transitions. [2018-11-18 09:25:52,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:25:52,719 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-11-18 09:25:52,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:25:52,726 INFO L225 Difference]: With dead ends: 63 [2018-11-18 09:25:52,726 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 09:25:52,728 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 09:25:52,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 09:25:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2018-11-18 09:25:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 09:25:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2018-11-18 09:25:52,753 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2018-11-18 09:25:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:25:52,753 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2018-11-18 09:25:52,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:25:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2018-11-18 09:25:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 09:25:52,755 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:25:52,755 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:25:52,755 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:25:52,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:25:52,756 INFO L82 PathProgramCache]: Analyzing trace with hash -410837410, now seen corresponding path program 1 times [2018-11-18 09:25:52,756 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:25:52,756 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:25:52,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:25:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:25:52,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:25:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:52,822 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 09:25:52,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:25:52,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 09:25:52,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:25:52,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:25:52,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 09:25:52,829 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2018-11-18 09:25:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:25:52,892 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2018-11-18 09:25:52,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:25:52,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-11-18 09:25:52,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:25:52,894 INFO L225 Difference]: With dead ends: 44 [2018-11-18 09:25:52,894 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 09:25:52,895 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:25:52,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 09:25:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2018-11-18 09:25:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 09:25:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2018-11-18 09:25:52,904 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2018-11-18 09:25:52,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:25:52,905 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2018-11-18 09:25:52,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:25:52,905 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2018-11-18 09:25:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 09:25:52,906 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:25:52,906 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:25:52,906 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:25:52,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:25:52,906 INFO L82 PathProgramCache]: Analyzing trace with hash 426459746, now seen corresponding path program 1 times [2018-11-18 09:25:52,907 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:25:52,907 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:25:52,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:25:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:25:53,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:25:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:53,040 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 09:25:53,042 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:25:53,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 09:25:53,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:25:53,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:25:53,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 09:25:53,044 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2018-11-18 09:25:53,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:25:53,081 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2018-11-18 09:25:53,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:25:53,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-18 09:25:53,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:25:53,082 INFO L225 Difference]: With dead ends: 49 [2018-11-18 09:25:53,082 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 09:25:53,083 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 09:25:53,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 09:25:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2018-11-18 09:25:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 09:25:53,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2018-11-18 09:25:53,087 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2018-11-18 09:25:53,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:25:53,087 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2018-11-18 09:25:53,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:25:53,087 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2018-11-18 09:25:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 09:25:53,088 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:25:53,088 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:25:53,088 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:25:53,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:25:53,088 INFO L82 PathProgramCache]: Analyzing trace with hash 684625184, now seen corresponding path program 1 times [2018-11-18 09:25:53,089 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:25:53,089 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:25:53,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:25:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:25:53,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:25:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:53,124 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 09:25:53,126 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:25:53,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 09:25:53,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:25:53,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:25:53,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 09:25:53,127 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2018-11-18 09:25:53,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:25:53,160 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2018-11-18 09:25:53,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:25:53,161 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-18 09:25:53,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:25:53,162 INFO L225 Difference]: With dead ends: 42 [2018-11-18 09:25:53,162 INFO L226 Difference]: Without dead ends: 29 [2018-11-18 09:25:53,163 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:25:53,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-18 09:25:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-11-18 09:25:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-18 09:25:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2018-11-18 09:25:53,169 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2018-11-18 09:25:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:25:53,169 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2018-11-18 09:25:53,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:25:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2018-11-18 09:25:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 09:25:53,170 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:25:53,170 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:25:53,171 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:25:53,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:25:53,171 INFO L82 PathProgramCache]: Analyzing trace with hash 346054296, now seen corresponding path program 1 times [2018-11-18 09:25:53,171 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:25:53,171 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:25:53,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:25:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:25:53,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:25:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:53,313 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:25:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:53,377 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 09:25:53,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2018-11-18 09:25:53,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 09:25:53,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 09:25:53,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-18 09:25:53,378 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2018-11-18 09:25:53,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:25:53,471 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2018-11-18 09:25:53,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:25:53,476 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-11-18 09:25:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:25:53,477 INFO L225 Difference]: With dead ends: 48 [2018-11-18 09:25:53,477 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 09:25:53,477 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-18 09:25:53,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 09:25:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-11-18 09:25:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-18 09:25:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2018-11-18 09:25:53,482 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2018-11-18 09:25:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:25:53,482 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2018-11-18 09:25:53,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 09:25:53,483 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2018-11-18 09:25:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 09:25:53,483 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:25:53,483 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:25:53,484 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:25:53,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:25:53,484 INFO L82 PathProgramCache]: Analyzing trace with hash -424941854, now seen corresponding path program 1 times [2018-11-18 09:25:53,484 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:25:53,484 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:25:53,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:25:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:25:53,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:25:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:53,658 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:25:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:53,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:25:53,816 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:25:53,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:25:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:25:53,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:25:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:53,908 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:25:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:54,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 09:25:54,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7] total 15 [2018-11-18 09:25:54,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 09:25:54,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 09:25:54,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2018-11-18 09:25:54,128 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 15 states. [2018-11-18 09:25:54,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:25:54,707 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2018-11-18 09:25:54,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 09:25:54,712 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2018-11-18 09:25:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:25:54,712 INFO L225 Difference]: With dead ends: 61 [2018-11-18 09:25:54,713 INFO L226 Difference]: Without dead ends: 37 [2018-11-18 09:25:54,713 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-18 09:25:54,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-18 09:25:54,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-11-18 09:25:54,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-18 09:25:54,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2018-11-18 09:25:54,718 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2018-11-18 09:25:54,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:25:54,719 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2018-11-18 09:25:54,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 09:25:54,719 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2018-11-18 09:25:54,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-18 09:25:54,719 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:25:54,720 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:25:54,720 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:25:54,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:25:54,721 INFO L82 PathProgramCache]: Analyzing trace with hash 313852504, now seen corresponding path program 2 times [2018-11-18 09:25:54,721 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:25:54,721 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:25:54,746 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-18 09:25:54,913 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 09:25:54,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:25:54,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:25:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:55,051 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:25:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:55,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:25:55,382 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:25:55,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 09:25:55,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 09:25:55,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:25:55,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:25:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:55,459 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:25:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:55,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 09:25:55,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8] total 13 [2018-11-18 09:25:55,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 09:25:55,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 09:25:55,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-11-18 09:25:55,589 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 13 states. [2018-11-18 09:25:56,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:25:56,025 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2018-11-18 09:25:56,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 09:25:56,028 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2018-11-18 09:25:56,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:25:56,029 INFO L225 Difference]: With dead ends: 55 [2018-11-18 09:25:56,029 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 09:25:56,029 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2018-11-18 09:25:56,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 09:25:56,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2018-11-18 09:25:56,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-18 09:25:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2018-11-18 09:25:56,034 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 29 [2018-11-18 09:25:56,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:25:56,035 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2018-11-18 09:25:56,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 09:25:56,035 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2018-11-18 09:25:56,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 09:25:56,035 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:25:56,035 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:25:56,035 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:25:56,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:25:56,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1970820318, now seen corresponding path program 3 times [2018-11-18 09:25:56,036 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:25:56,036 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:25:56,050 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-18 09:25:56,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-18 09:25:56,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:25:56,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:25:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:56,798 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:25:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:57,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:25:57,191 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:25:57,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 09:25:57,237 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-18 09:25:57,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:25:57,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:25:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:57,247 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:25:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:25:57,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 09:25:57,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9] total 15 [2018-11-18 09:25:57,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 09:25:57,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 09:25:57,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2018-11-18 09:25:57,360 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 15 states. [2018-11-18 09:25:57,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:25:57,750 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2018-11-18 09:25:57,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 09:25:57,751 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2018-11-18 09:25:57,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:25:57,751 INFO L225 Difference]: With dead ends: 60 [2018-11-18 09:25:57,751 INFO L226 Difference]: Without dead ends: 47 [2018-11-18 09:25:57,752 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-11-18 09:25:57,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-18 09:25:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2018-11-18 09:25:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-18 09:25:57,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2018-11-18 09:25:57,756 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 32 [2018-11-18 09:25:57,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:25:57,756 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2018-11-18 09:25:57,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 09:25:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2018-11-18 09:25:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 09:25:57,757 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:25:57,757 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:25:57,757 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:25:57,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:25:57,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1313029728, now seen corresponding path program 4 times [2018-11-18 09:25:57,758 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:25:57,758 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:25:57,778 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 09:25:57,844 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 09:25:57,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:25:57,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:25:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:25:57,982 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:26:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:26:00,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:26:00,168 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:26:00,176 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 09:26:00,191 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 09:26:00,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:26:00,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:26:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:26:00,478 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:26:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:26:03,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 09:26:03,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 8] total 20 [2018-11-18 09:26:03,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 09:26:03,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 09:26:03,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=313, Unknown=1, NotChecked=0, Total=380 [2018-11-18 09:26:03,508 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 20 states. [2018-11-18 09:26:07,621 WARN L180 SmtUtils]: Spent 3.79 s on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2018-11-18 09:26:08,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:26:08,238 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2018-11-18 09:26:08,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 09:26:08,240 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2018-11-18 09:26:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:26:08,241 INFO L225 Difference]: With dead ends: 58 [2018-11-18 09:26:08,241 INFO L226 Difference]: Without dead ends: 40 [2018-11-18 09:26:08,241 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=79, Invalid=382, Unknown=1, NotChecked=0, Total=462 [2018-11-18 09:26:08,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-18 09:26:08,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-11-18 09:26:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-18 09:26:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-11-18 09:26:08,245 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 32 [2018-11-18 09:26:08,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:26:08,245 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-11-18 09:26:08,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 09:26:08,245 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-11-18 09:26:08,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-18 09:26:08,245 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:26:08,246 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:26:08,246 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:26:08,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:26:08,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1982846488, now seen corresponding path program 5 times [2018-11-18 09:26:08,246 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:26:08,246 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:26:08,257 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-11-18 09:26:08,379 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-18 09:26:08,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:26:08,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:26:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:26:08,683 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:26:18,291 WARN L180 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-11-18 09:26:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:26:18,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:26:18,308 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:26:18,316 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 09:26:18,351 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-18 09:26:18,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:26:18,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:26:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:26:18,976 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:26:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:26:20,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 09:26:20,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 10] total 25 [2018-11-18 09:26:20,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-18 09:26:20,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-18 09:26:20,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=521, Unknown=3, NotChecked=0, Total=600 [2018-11-18 09:26:20,784 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 25 states. [2018-11-18 09:26:51,486 WARN L180 SmtUtils]: Spent 30.21 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2018-11-18 09:27:13,963 WARN L180 SmtUtils]: Spent 20.17 s on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2018-11-18 09:27:14,345 WARN L180 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2018-11-18 09:27:14,777 WARN L180 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2018-11-18 09:27:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:27:15,950 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2018-11-18 09:27:15,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 09:27:15,952 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2018-11-18 09:27:15,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:27:15,952 INFO L225 Difference]: With dead ends: 71 [2018-11-18 09:27:15,952 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 09:27:15,953 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 64.0s TimeCoverageRelationStatistics Valid=151, Invalid=902, Unknown=3, NotChecked=0, Total=1056 [2018-11-18 09:27:15,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 09:27:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2018-11-18 09:27:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-18 09:27:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2018-11-18 09:27:15,958 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 35 [2018-11-18 09:27:15,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:27:15,958 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2018-11-18 09:27:15,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-18 09:27:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2018-11-18 09:27:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-18 09:27:15,959 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:27:15,959 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:27:15,959 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:27:15,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:27:15,959 INFO L82 PathProgramCache]: Analyzing trace with hash 971729238, now seen corresponding path program 6 times [2018-11-18 09:27:15,960 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:27:15,960 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:27:15,973 INFO L101 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2018-11-18 09:27:16,535 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-11-18 09:27:16,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:27:16,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:27:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 09:27:17,142 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:27:21,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:27:21,242 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:27:21,247 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 09:27:21,290 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-11-18 09:27:21,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:27:21,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:27:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-18 09:27:22,647 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:27:22,764 WARN L180 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2018-11-18 09:27:23,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:27:23,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2018-11-18 09:27:23,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 09:27:23,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 09:27:23,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2018-11-18 09:27:23,473 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 20 states. [2018-11-18 09:27:25,165 WARN L180 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2018-11-18 09:27:25,735 WARN L180 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2018-11-18 09:27:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:27:26,390 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-11-18 09:27:26,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 09:27:26,391 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2018-11-18 09:27:26,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:27:26,391 INFO L225 Difference]: With dead ends: 59 [2018-11-18 09:27:26,391 INFO L226 Difference]: Without dead ends: 46 [2018-11-18 09:27:26,392 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 09:27:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-18 09:27:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2018-11-18 09:27:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-18 09:27:26,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2018-11-18 09:27:26,397 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 35 [2018-11-18 09:27:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:27:26,397 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2018-11-18 09:27:26,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 09:27:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2018-11-18 09:27:26,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-18 09:27:26,397 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:27:26,397 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:27:26,397 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:27:26,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:27:26,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1100809372, now seen corresponding path program 7 times [2018-11-18 09:27:26,398 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:27:26,398 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:27:26,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:27:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:27:26,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:27:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:27:26,741 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:27:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:27:35,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:27:35,976 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:27:35,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:27:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:27:36,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:27:50,561 WARN L180 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2018-11-18 09:27:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:27:50,568 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:27:50,798 WARN L180 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2018-11-18 09:28:05,054 WARN L180 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-11-18 09:28:08,470 WARN L180 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2018-11-18 09:28:11,500 WARN L180 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-11-18 09:28:15,970 WARN L180 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2018-11-18 09:28:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:28:15,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 09:28:15,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11] total 30 [2018-11-18 09:28:15,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-18 09:28:15,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-18 09:28:15,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=730, Unknown=12, NotChecked=0, Total=870 [2018-11-18 09:28:16,000 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 30 states. [2018-11-18 09:28:29,441 WARN L180 SmtUtils]: Spent 12.16 s on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2018-11-18 09:28:44,512 WARN L180 SmtUtils]: Spent 14.45 s on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2018-11-18 09:28:45,142 WARN L180 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2018-11-18 09:28:47,279 WARN L180 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2018-11-18 09:28:47,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:28:47,926 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2018-11-18 09:28:47,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 09:28:47,931 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2018-11-18 09:28:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:28:47,932 INFO L225 Difference]: With dead ends: 61 [2018-11-18 09:28:47,932 INFO L226 Difference]: Without dead ends: 43 [2018-11-18 09:28:47,933 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 76.5s TimeCoverageRelationStatistics Valid=175, Invalid=935, Unknown=12, NotChecked=0, Total=1122 [2018-11-18 09:28:47,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-18 09:28:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-11-18 09:28:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-18 09:28:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-11-18 09:28:47,940 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 38 [2018-11-18 09:28:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:28:47,940 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-11-18 09:28:47,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-18 09:28:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-11-18 09:28:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-18 09:28:47,941 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:28:47,941 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:28:47,941 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:28:47,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:28:47,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2111926622, now seen corresponding path program 8 times [2018-11-18 09:28:47,942 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:28:47,942 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/cvc4nyu Starting monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:28:47,955 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-18 09:28:48,137 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 09:28:48,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:28:48,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:28:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:28:48,467 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:28:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 17 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:28:58,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:28:58,006 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a98527ca-1ddc-4996-94c8-469a2403afce/bin-2019/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:28:58,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 09:28:58,032 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 09:28:58,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:28:58,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:29:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:29:02,546 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:29:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:29:09,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 09:29:09,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 11] total 28 [2018-11-18 09:29:09,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-18 09:29:09,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-18 09:29:09,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=673, Unknown=7, NotChecked=0, Total=756 [2018-11-18 09:29:09,689 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 28 states. [2018-11-18 09:29:16,251 WARN L180 SmtUtils]: Spent 6.06 s on a formula simplification that was a NOOP. DAG size: 33 [2018-11-18 09:29:17,286 WARN L180 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 13 [2018-11-18 09:29:17,750 WARN L180 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2018-11-18 09:29:20,308 WARN L180 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 31 DAG size of output: 15 [2018-11-18 09:29:22,960 WARN L180 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2018-11-18 09:29:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:29:54,928 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2018-11-18 09:29:54,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 09:29:54,929 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 38 [2018-11-18 09:29:54,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:29:54,930 INFO L225 Difference]: With dead ends: 57 [2018-11-18 09:29:54,930 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 09:29:54,931 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=185, Invalid=1365, Unknown=10, NotChecked=0, Total=1560 [2018-11-18 09:29:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 09:29:54,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 09:29:54,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 09:29:54,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 09:29:54,931 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2018-11-18 09:29:54,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:29:54,931 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 09:29:54,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-18 09:29:54,931 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 09:29:54,931 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 09:29:54,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 09:31:57,036 WARN L180 SmtUtils]: Spent 2.03 m on a formula simplification. DAG size of input: 142 DAG size of output: 67 [2018-11-18 09:31:57,038 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 09:31:57,038 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 09:31:57,038 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 09:31:57,038 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 09:31:57,038 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 09:31:57,038 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 09:31:57,038 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 30 46) the Hoare annotation is: true [2018-11-18 09:31:57,038 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 30 46) no Hoare annotation was computed. [2018-11-18 09:31:57,038 INFO L425 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2018-11-18 09:31:57,038 INFO L421 ceAbstractionStarter]: At program point L42(line 42) the Hoare annotation is: (let ((.cse0 (bvmul (_ bv4294967294 32) (bvneg main_~g~0)))) (and (= (bvadd .cse0 (_ bv4294967278 32)) (_ bv0 32)) (= (bvadd main_~x~0 (_ bv4294967233 32)) (_ bv0 32)) (= (bvadd main_~y~0 (_ bv4294967278 32)) (_ bv0 32)) (bvsgt (bvadd (bvmul (_ bv2 32) (bvneg (bvneg .cse0))) main_~g~0) .cse0))) [2018-11-18 09:31:57,039 INFO L421 ceAbstractionStarter]: At program point L41(line 41) the Hoare annotation is: (let ((.cse0 (bvmul (_ bv4294967294 32) (bvneg main_~g~0)))) (and (= (bvadd .cse0 (_ bv4294967278 32)) (_ bv0 32)) (= (bvadd main_~x~0 (_ bv4294967233 32)) (_ bv0 32)) (= (bvadd main_~y~0 (_ bv4294967278 32)) (_ bv0 32)) (bvsgt (bvadd (bvmul (_ bv2 32) (bvneg (bvneg .cse0))) main_~g~0) .cse0))) [2018-11-18 09:31:57,039 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 30 46) no Hoare annotation was computed. [2018-11-18 09:31:57,039 INFO L421 ceAbstractionStarter]: At program point L41-1(line 41) the Hoare annotation is: (let ((.cse0 (bvmul (_ bv4294967294 32) (bvneg main_~g~0)))) (and (= (bvadd .cse0 (_ bv4294967278 32)) (_ bv0 32)) (= (bvadd main_~x~0 (_ bv4294967233 32)) (_ bv0 32)) (= (bvadd main_~y~0 (_ bv4294967278 32)) (_ bv0 32)) (bvsgt (bvadd (bvmul (_ bv2 32) (bvneg (bvneg .cse0))) main_~g~0) .cse0))) [2018-11-18 09:31:57,039 INFO L421 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: (and (= (bvadd main_~x~0 (_ bv4294967233 32)) (_ bv0 32)) (= (bvadd main_~y~0 (_ bv4294967278 32)) (_ bv0 32))) [2018-11-18 09:31:57,039 INFO L425 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2018-11-18 09:31:57,039 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2018-11-18 09:31:57,039 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2018-11-18 09:31:57,039 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2018-11-18 09:31:57,039 INFO L425 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2018-11-18 09:31:57,039 INFO L425 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2018-11-18 09:31:57,039 INFO L425 ceAbstractionStarter]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2018-11-18 09:31:57,040 INFO L425 ceAbstractionStarter]: For program point gcd_testEXIT(lines 10 27) no Hoare annotation was computed. [2018-11-18 09:31:57,040 INFO L425 ceAbstractionStarter]: For program point L19-1(lines 19 25) no Hoare annotation was computed. [2018-11-18 09:31:57,040 INFO L425 ceAbstractionStarter]: For program point L19-3(lines 19 25) no Hoare annotation was computed. [2018-11-18 09:31:57,040 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 11 27) no Hoare annotation was computed. [2018-11-18 09:31:57,040 INFO L428 ceAbstractionStarter]: At program point gcd_testENTRY(lines 10 27) the Hoare annotation is: true [2018-11-18 09:31:57,040 INFO L425 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-18 09:31:57,040 INFO L421 ceAbstractionStarter]: At program point L20-2(lines 19 25) the Hoare annotation is: (let ((.cse9 (bvneg |gcd_test_#in~b|))) (let ((.cse12 (bvmul (_ bv3 32) .cse9))) (let ((.cse10 (bvadd .cse12 |gcd_test_#in~a|)) (.cse6 (bvneg gcd_test_~b)) (.cse3 (bvadd |gcd_test_#in~a| .cse12))) (let ((.cse4 (bvneg .cse3)) (.cse8 (bvneg gcd_test_~a)) (.cse5 (= gcd_test_~b |gcd_test_#in~b|)) (.cse7 (bvmul (_ bv2 32) .cse6)) (.cse0 (bvsgt .cse10 (bvadd (bvneg .cse10) |gcd_test_#in~b|)))) (or .cse0 (let ((.cse1 (bvadd gcd_test_~a .cse7))) (let ((.cse2 (bvneg .cse1))) (and (or (not (bvsgt .cse1 (bvadd gcd_test_~b .cse2))) (bvsgt .cse3 (bvadd |gcd_test_#in~b| .cse4))) .cse5 (= gcd_test_~a (bvadd |gcd_test_#in~a| .cse6)) (= (_ bv0 32) (bvadd gcd_test_~b (bvmul (_ bv2 32) .cse2)))))) (and (= gcd_test_~a (bvadd |gcd_test_#in~a| (bvmul (_ bv3 32) .cse6))) .cse5) (and .cse5 (= gcd_test_~a |gcd_test_#in~a|)) (and (= gcd_test_~a .cse3) (= gcd_test_~b (bvadd (bvmul (_ bv2 32) .cse8) |gcd_test_#in~b|))) (not (bvsgt (bvadd |gcd_test_#in~a| .cse9) |gcd_test_#in~b|)) (not (= (bvadd |gcd_test_#in~b| (bvmul (_ bv2 32) .cse4)) (_ bv0 32))) (and (= gcd_test_~b (bvadd .cse8 |gcd_test_#in~b|)) (= gcd_test_~a .cse10)) (and .cse5 (= gcd_test_~a (bvadd |gcd_test_#in~a| .cse7)) (or (not (let ((.cse11 (bvadd gcd_test_~a .cse6))) (bvsgt .cse11 (bvadd gcd_test_~b (bvneg .cse11))))) .cse0)) (bvslt |gcd_test_#in~a| (_ bv0 32)) (bvslt |gcd_test_#in~b| (_ bv0 32))))))) [2018-11-18 09:31:57,040 INFO L425 ceAbstractionStarter]: For program point L12(line 12) no Hoare annotation was computed. [2018-11-18 09:31:57,040 INFO L425 ceAbstractionStarter]: For program point L12-2(lines 11 27) no Hoare annotation was computed. [2018-11-18 09:31:57,040 INFO L425 ceAbstractionStarter]: For program point gcd_testFINAL(lines 10 27) no Hoare annotation was computed. [2018-11-18 09:31:57,043 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: translation of (bvmul (_ BitVec 32) (_ BitVec 32) (_ BitVec 32)) not yet implemented, please contact Matthias at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:209) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:373) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:108) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:92) at de.uni_freiburg.informatik.ultimate.core.lib.results.InvariantResult.getLongDescription(InvariantResult.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportResult(TraceAbstractionStarter.java:537) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:237) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:194) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-11-18 09:31:57,045 INFO L168 Benchmark]: Toolchain (without parser) took 365062.86 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 234.4 MB). Free memory was 950.8 MB in the beginning and 949.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 236.0 MB. Max. memory is 11.5 GB. [2018-11-18 09:31:57,045 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:31:57,046 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.09 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 939.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-11-18 09:31:57,046 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.16 ms. Allocated memory is still 1.0 GB. Free memory was 939.0 MB in the beginning and 933.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 09:31:57,046 INFO L168 Benchmark]: Boogie Preprocessor took 16.13 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:31:57,047 INFO L168 Benchmark]: RCFGBuilder took 198.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.1 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -155.8 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. [2018-11-18 09:31:57,047 INFO L168 Benchmark]: TraceAbstraction took 364665.12 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 123.2 MB). Free memory was 1.1 GB in the beginning and 949.2 MB in the end (delta: 140.3 MB). Peak memory consumption was 263.5 MB. Max. memory is 11.5 GB. [2018-11-18 09:31:57,050 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 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 167.09 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 939.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.16 ms. Allocated memory is still 1.0 GB. Free memory was 939.0 MB in the beginning and 933.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.13 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 198.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.1 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -155.8 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 364665.12 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 123.2 MB). Free memory was 1.1 GB in the beginning and 949.2 MB in the end (delta: 140.3 MB). Peak memory consumption was 263.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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 - ExceptionOrErrorResult: UnsupportedOperationException: translation of (bvmul (_ BitVec 32) (_ BitVec 32) (_ BitVec 32)) not yet implemented, please contact Matthias de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: translation of (bvmul (_ BitVec 32) (_ BitVec 32) (_ BitVec 32)) not yet implemented, please contact Matthias: de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:209) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...