./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/ldv-regression/test23_false-unreach-call.c --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_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23_false-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 b974f281a213c0803f91ef44d205e442fb2a5f8f ....................................................................................................................................................................................................................................................................................................................................................................... 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_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23_false-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 b974f281a213c0803f91ef44d205e442fb2a5f8f ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: ConstantTerm is neither BigInter nor BigDecimal, therefore comparison is not possible! --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 11:57:32,626 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 11:57:32,627 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 11:57:32,636 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 11:57:32,636 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 11:57:32,637 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 11:57:32,637 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 11:57:32,639 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 11:57:32,640 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 11:57:32,640 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 11:57:32,641 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 11:57:32,641 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 11:57:32,642 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 11:57:32,642 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 11:57:32,643 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 11:57:32,643 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 11:57:32,644 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 11:57:32,644 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 11:57:32,646 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 11:57:32,646 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 11:57:32,647 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 11:57:32,648 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 11:57:32,649 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 11:57:32,649 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 11:57:32,649 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 11:57:32,650 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 11:57:32,651 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 11:57:32,651 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 11:57:32,652 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 11:57:32,653 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 11:57:32,653 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 11:57:32,653 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 11:57:32,653 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 11:57:32,654 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 11:57:32,654 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 11:57:32,655 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 11:57:32,655 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 11:57:32,662 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 11:57:32,663 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 11:57:32,663 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 11:57:32,663 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 11:57:32,663 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 11:57:32,663 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 11:57:32,664 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 11:57:32,664 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 11:57:32,664 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 11:57:32,664 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 11:57:32,664 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 11:57:32,664 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 11:57:32,664 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 11:57:32,665 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 11:57:32,665 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 11:57:32,665 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 11:57:32,665 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 11:57:32,665 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 11:57:32,665 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 11:57:32,665 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 11:57:32,665 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 11:57:32,666 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 11:57:32,666 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 11:57:32,666 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 11:57:32,666 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 11:57:32,666 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 11:57:32,666 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 11:57:32,666 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 11:57:32,666 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 11:57:32,667 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 11:57:32,667 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 11:57:32,667 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 11:57:32,667 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 11:57:32,667 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 11:57:32,667 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 11:57:32,667 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 11:57:32,668 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 11:57:32,668 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_a22e9626-d272-43a5-878f-59d025c94a3c/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 -> b974f281a213c0803f91ef44d205e442fb2a5f8f [2018-11-18 11:57:32,693 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 11:57:32,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 11:57:32,704 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 11:57:32,705 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 11:57:32,706 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 11:57:32,706 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/../../sv-benchmarks/c/ldv-regression/test23_false-unreach-call.c [2018-11-18 11:57:32,750 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/data/090c0a4e3/533d895f117a4921af65dee690e3e01b/FLAG723b0dd5c [2018-11-18 11:57:33,150 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 11:57:33,150 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/sv-benchmarks/c/ldv-regression/test23_false-unreach-call.c [2018-11-18 11:57:33,155 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/data/090c0a4e3/533d895f117a4921af65dee690e3e01b/FLAG723b0dd5c [2018-11-18 11:57:33,165 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/data/090c0a4e3/533d895f117a4921af65dee690e3e01b [2018-11-18 11:57:33,167 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 11:57:33,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 11:57:33,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 11:57:33,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 11:57:33,170 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 11:57:33,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:57:33" (1/1) ... [2018-11-18 11:57:33,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c955aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:33, skipping insertion in model container [2018-11-18 11:57:33,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:57:33" (1/1) ... [2018-11-18 11:57:33,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 11:57:33,192 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 11:57:33,300 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:57:33,310 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 11:57:33,323 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:57:33,332 INFO L195 MainTranslator]: Completed translation [2018-11-18 11:57:33,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:33 WrapperNode [2018-11-18 11:57:33,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 11:57:33,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 11:57:33,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 11:57:33,333 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 11:57:33,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:33" (1/1) ... [2018-11-18 11:57:33,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:33" (1/1) ... [2018-11-18 11:57:33,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 11:57:33,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 11:57:33,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 11:57:33,348 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 11:57:33,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:33" (1/1) ... [2018-11-18 11:57:33,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:33" (1/1) ... [2018-11-18 11:57:33,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:33" (1/1) ... [2018-11-18 11:57:33,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:33" (1/1) ... [2018-11-18 11:57:33,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:33" (1/1) ... [2018-11-18 11:57:33,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:33" (1/1) ... [2018-11-18 11:57:33,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:33" (1/1) ... [2018-11-18 11:57:33,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 11:57:33,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 11:57:33,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 11:57:33,405 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 11:57:33,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:33,444 INFO L130 BoogieDeclarations]: Found specification of procedure init [2018-11-18 11:57:33,444 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2018-11-18 11:57:33,444 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 11:57:33,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 11:57:33,445 INFO L130 BoogieDeclarations]: Found specification of procedure check [2018-11-18 11:57:33,445 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2018-11-18 11:57:33,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-11-18 11:57:33,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 11:57:33,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 11:57:33,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 11:57:33,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 11:57:33,445 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2018-11-18 11:57:33,445 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2018-11-18 11:57:33,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 11:57:33,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 11:57:33,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 11:57:33,650 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 11:57:33,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:57:33 BoogieIcfgContainer [2018-11-18 11:57:33,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 11:57:33,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 11:57:33,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 11:57:33,654 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 11:57:33,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 11:57:33" (1/3) ... [2018-11-18 11:57:33,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da18dfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:57:33, skipping insertion in model container [2018-11-18 11:57:33,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:33" (2/3) ... [2018-11-18 11:57:33,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da18dfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:57:33, skipping insertion in model container [2018-11-18 11:57:33,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:57:33" (3/3) ... [2018-11-18 11:57:33,657 INFO L112 eAbstractionObserver]: Analyzing ICFG test23_false-unreach-call.c [2018-11-18 11:57:33,665 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 11:57:33,671 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 11:57:33,683 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 11:57:33,702 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 11:57:33,702 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 11:57:33,702 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 11:57:33,703 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 11:57:33,703 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 11:57:33,703 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 11:57:33,703 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 11:57:33,703 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 11:57:33,714 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2018-11-18 11:57:33,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-18 11:57:33,719 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:57:33,719 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:33,721 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:57:33,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:33,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1683786646, now seen corresponding path program 1 times [2018-11-18 11:57:33,727 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:57:33,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:33,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:33,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:33,762 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:57:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:33,863 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:57:33,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 11:57:33,864 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:57:33,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 11:57:33,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 11:57:33,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 11:57:33,878 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2018-11-18 11:57:33,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:57:33,890 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2018-11-18 11:57:33,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 11:57:33,891 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2018-11-18 11:57:33,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:57:33,897 INFO L225 Difference]: With dead ends: 47 [2018-11-18 11:57:33,897 INFO L226 Difference]: Without dead ends: 29 [2018-11-18 11:57:33,900 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 11:57:33,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-18 11:57:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-11-18 11:57:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-18 11:57:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-11-18 11:57:33,924 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 30 [2018-11-18 11:57:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:57:33,925 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-11-18 11:57:33,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 11:57:33,926 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-11-18 11:57:33,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 11:57:33,927 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:57:33,927 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:33,927 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:57:33,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:33,928 INFO L82 PathProgramCache]: Analyzing trace with hash 2006286896, now seen corresponding path program 1 times [2018-11-18 11:57:33,928 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:57:33,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:33,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:33,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:33,929 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:57:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:34,200 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:57:34,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-11-18 11:57:34,200 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:57:34,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 11:57:34,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 11:57:34,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-11-18 11:57:34,202 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2018-11-18 11:57:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:57:34,465 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2018-11-18 11:57:34,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 11:57:34,466 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-11-18 11:57:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:57:34,467 INFO L225 Difference]: With dead ends: 57 [2018-11-18 11:57:34,468 INFO L226 Difference]: Without dead ends: 49 [2018-11-18 11:57:34,468 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2018-11-18 11:57:34,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-18 11:57:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2018-11-18 11:57:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 11:57:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2018-11-18 11:57:34,477 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 32 [2018-11-18 11:57:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:57:34,477 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2018-11-18 11:57:34,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 11:57:34,477 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2018-11-18 11:57:34,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 11:57:34,478 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:57:34,478 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:34,479 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:57:34,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:34,479 INFO L82 PathProgramCache]: Analyzing trace with hash -2069825682, now seen corresponding path program 1 times [2018-11-18 11:57:34,479 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:57:34,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:34,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:34,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:34,480 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:57:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:57:34,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:57:34,614 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:57:34,615 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-11-18 11:57:34,616 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [3], [6], [8], [10], [11], [17], [19], [22], [26], [28], [31], [38], [41], [48], [51], [52], [53], [54], [55], [57], [58], [59], [60], [61], [62], [63], [64] [2018-11-18 11:57:34,644 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 11:57:34,644 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 11:57:34,713 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:391) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.handleInfeasibleCase(BaseRefinementStrategy.java:296) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:206) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) 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: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.MappedTerm2Expression.translate(MappedTerm2Expression.java:209) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.MappedTerm2Expression.translate(MappedTerm2Expression.java:129) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.MappedTerm2Expression.translateStore(MappedTerm2Expression.java:291) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.MappedTerm2Expression.translate(MappedTerm2Expression.java:157) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.MappedTerm2Expression.translate(MappedTerm2Expression.java:129) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.MappedTerm2Expression.translateStore(MappedTerm2Expression.java:288) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.MappedTerm2Expression.translate(MappedTerm2Expression.java:157) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.MappedTerm2Expression.translate(MappedTerm2Expression.java:129) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.MappedTerm2Expression.translate(MappedTerm2Expression.java:165) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.boogie.MappedTerm2Expression.translate(MappedTerm2Expression.java:129) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.util.AssumptionBuilder.constructBoogieAssumeStatement(AssumptionBuilder.java:75) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.util.TermConjunctEvaluator.getCachedCodeBlock(TermConjunctEvaluator.java:273) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.util.TermConjunctEvaluator.applyPost(TermConjunctEvaluator.java:296) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.util.TermConjunctEvaluator.lambda$4(TermConjunctEvaluator.java:178) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.util.TermConjunctEvaluator.computeFixpoint(TermConjunctEvaluator.java:198) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.util.TermConjunctEvaluator.lambda$1(TermConjunctEvaluator.java:150) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.util.TermConjunctEvaluator.computePost(TermConjunctEvaluator.java:93) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.applyPost(PoormanCachedPostOperation.java:308) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:119) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:340) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:536) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:340) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:217) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.constructInterpolantGenerator(BaseTaipanRefinementStrategy.java:379) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getInterpolantGenerator(BaseTaipanRefinementStrategy.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:380) ... 20 more [2018-11-18 11:57:34,715 INFO L168 Benchmark]: Toolchain (without parser) took 1548.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 961.9 MB in the beginning and 1.0 GB in the end (delta: -49.8 MB). Peak memory consumption was 100.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:57:34,716 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:57:34,717 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.22 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 945.8 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-18 11:57:34,717 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.97 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:57:34,717 INFO L168 Benchmark]: Boogie Preprocessor took 56.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -199.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:57:34,718 INFO L168 Benchmark]: RCFGBuilder took 245.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-18 11:57:34,718 INFO L168 Benchmark]: TraceAbstraction took 1063.58 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 113.7 MB). Peak memory consumption was 113.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:57:34,722 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 165.22 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 945.8 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.97 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 56.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -199.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 245.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1063.58 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 113.7 MB). Peak memory consumption was 113.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)): de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:391) 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 11:57:36,131 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 11:57:36,132 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 11:57:36,139 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 11:57:36,139 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 11:57:36,140 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 11:57:36,141 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 11:57:36,142 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 11:57:36,143 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 11:57:36,143 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 11:57:36,144 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 11:57:36,144 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 11:57:36,145 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 11:57:36,145 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 11:57:36,146 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 11:57:36,147 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 11:57:36,147 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 11:57:36,148 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 11:57:36,150 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 11:57:36,151 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 11:57:36,152 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 11:57:36,153 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 11:57:36,155 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 11:57:36,155 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 11:57:36,155 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 11:57:36,156 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 11:57:36,157 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 11:57:36,157 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 11:57:36,158 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 11:57:36,158 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 11:57:36,158 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 11:57:36,159 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 11:57:36,159 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 11:57:36,159 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 11:57:36,160 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 11:57:36,160 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 11:57:36,160 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-11-18 11:57:36,171 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 11:57:36,172 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 11:57:36,172 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 11:57:36,172 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 11:57:36,172 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 11:57:36,172 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 11:57:36,172 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 11:57:36,173 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 11:57:36,173 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 11:57:36,173 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 11:57:36,173 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 11:57:36,173 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 11:57:36,174 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 11:57:36,174 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 11:57:36,174 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 11:57:36,175 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 11:57:36,175 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 11:57:36,175 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-18 11:57:36,175 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-18 11:57:36,175 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 11:57:36,175 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 11:57:36,175 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 11:57:36,175 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 11:57:36,176 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 11:57:36,176 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 11:57:36,176 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 11:57:36,176 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 11:57:36,176 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 11:57:36,176 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 11:57:36,176 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 11:57:36,176 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 11:57:36,176 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-11-18 11:57:36,176 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 11:57:36,176 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-18 11:57:36,176 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-18 11:57:36,177 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_a22e9626-d272-43a5-878f-59d025c94a3c/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 -> b974f281a213c0803f91ef44d205e442fb2a5f8f [2018-11-18 11:57:36,209 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 11:57:36,218 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 11:57:36,220 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 11:57:36,222 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 11:57:36,222 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 11:57:36,222 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/../../sv-benchmarks/c/ldv-regression/test23_false-unreach-call.c [2018-11-18 11:57:36,264 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/data/f6df47e2f/493b917469e940a1be3b3f6f6f3132df/FLAG19fb83c0b [2018-11-18 11:57:36,652 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 11:57:36,653 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/sv-benchmarks/c/ldv-regression/test23_false-unreach-call.c [2018-11-18 11:57:36,657 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/data/f6df47e2f/493b917469e940a1be3b3f6f6f3132df/FLAG19fb83c0b [2018-11-18 11:57:36,665 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/bin-2019/utaipan/data/f6df47e2f/493b917469e940a1be3b3f6f6f3132df [2018-11-18 11:57:36,667 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 11:57:36,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 11:57:36,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 11:57:36,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 11:57:36,671 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 11:57:36,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:57:36" (1/1) ... [2018-11-18 11:57:36,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a52d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:36, skipping insertion in model container [2018-11-18 11:57:36,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:57:36" (1/1) ... [2018-11-18 11:57:36,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 11:57:36,691 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 11:57:36,811 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:57:36,819 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 11:57:36,833 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:57:36,845 INFO L195 MainTranslator]: Completed translation [2018-11-18 11:57:36,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:36 WrapperNode [2018-11-18 11:57:36,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 11:57:36,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 11:57:36,846 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 11:57:36,846 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 11:57:36,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:36" (1/1) ... [2018-11-18 11:57:36,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:36" (1/1) ... [2018-11-18 11:57:36,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 11:57:36,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 11:57:36,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 11:57:36,862 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 11:57:36,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:36" (1/1) ... [2018-11-18 11:57:36,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:36" (1/1) ... [2018-11-18 11:57:36,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:36" (1/1) ... [2018-11-18 11:57:36,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:36" (1/1) ... [2018-11-18 11:57:36,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:36" (1/1) ... [2018-11-18 11:57:36,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:36" (1/1) ... [2018-11-18 11:57:36,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:36" (1/1) ... [2018-11-18 11:57:36,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 11:57:36,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 11:57:36,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 11:57:36,885 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 11:57:36,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure init [2018-11-18 11:57:36,974 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2018-11-18 11:57:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 11:57:36,974 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 11:57:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure check [2018-11-18 11:57:36,974 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2018-11-18 11:57:36,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 11:57:36,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 11:57:36,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 11:57:36,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-11-18 11:57:36,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2018-11-18 11:57:36,975 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2018-11-18 11:57:36,975 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2018-11-18 11:57:36,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 11:57:36,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 11:57:36,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-11-18 11:57:37,153 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 11:57:37,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:57:37 BoogieIcfgContainer [2018-11-18 11:57:37,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 11:57:37,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 11:57:37,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 11:57:37,156 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 11:57:37,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 11:57:36" (1/3) ... [2018-11-18 11:57:37,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124f56ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:57:37, skipping insertion in model container [2018-11-18 11:57:37,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:36" (2/3) ... [2018-11-18 11:57:37,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124f56ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:57:37, skipping insertion in model container [2018-11-18 11:57:37,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:57:37" (3/3) ... [2018-11-18 11:57:37,159 INFO L112 eAbstractionObserver]: Analyzing ICFG test23_false-unreach-call.c [2018-11-18 11:57:37,167 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 11:57:37,172 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 11:57:37,181 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 11:57:37,199 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 11:57:37,200 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 11:57:37,200 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 11:57:37,200 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 11:57:37,200 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 11:57:37,200 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 11:57:37,200 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 11:57:37,200 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 11:57:37,200 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 11:57:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-18 11:57:37,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-18 11:57:37,216 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:57:37,217 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:37,218 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:57:37,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:37,221 INFO L82 PathProgramCache]: Analyzing trace with hash 390970509, now seen corresponding path program 1 times [2018-11-18 11:57:37,224 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 11:57:37,225 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:37,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:37,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:37,322 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (2)] Exception during sending of exit command (exit): Broken pipe [2018-11-18 11:57:37,331 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:57:37,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 11:57:37,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 11:57:37,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 11:57:37,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 11:57:37,343 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2018-11-18 11:57:37,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:57:37,355 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-11-18 11:57:37,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 11:57:37,355 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2018-11-18 11:57:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:57:37,363 INFO L225 Difference]: With dead ends: 45 [2018-11-18 11:57:37,363 INFO L226 Difference]: Without dead ends: 28 [2018-11-18 11:57:37,365 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 11:57:37,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-18 11:57:37,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-18 11:57:37,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 11:57:37,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-11-18 11:57:37,392 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 29 [2018-11-18 11:57:37,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:57:37,394 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-11-18 11:57:37,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 11:57:37,394 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-11-18 11:57:37,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 11:57:37,395 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:57:37,395 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:37,396 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:57:37,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:37,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1652692665, now seen corresponding path program 1 times [2018-11-18 11:57:37,397 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 11:57:37,397 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:37,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:37,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:37,694 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-11-18 11:57:37,698 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-11-18 11:57:37,699 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:37,703 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:37,727 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:37,727 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2018-11-18 11:57:37,764 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2018-11-18 11:57:37,769 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 9 [2018-11-18 11:57:37,770 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:37,775 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:37,784 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:37,784 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:12 [2018-11-18 11:57:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:37,828 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 11:57:37,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:57:37,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-11-18 11:57:37,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 11:57:37,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 11:57:37,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2018-11-18 11:57:37,832 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2018-11-18 11:57:38,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:57:38,403 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2018-11-18 11:57:38,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 11:57:38,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-11-18 11:57:38,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:57:38,406 INFO L225 Difference]: With dead ends: 54 [2018-11-18 11:57:38,407 INFO L226 Difference]: Without dead ends: 47 [2018-11-18 11:57:38,407 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-18 11:57:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-18 11:57:38,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2018-11-18 11:57:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-18 11:57:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2018-11-18 11:57:38,415 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 31 [2018-11-18 11:57:38,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:57:38,416 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2018-11-18 11:57:38,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 11:57:38,416 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2018-11-18 11:57:38,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 11:57:38,417 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:57:38,417 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:38,417 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:57:38,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:38,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1229990839, now seen corresponding path program 1 times [2018-11-18 11:57:38,418 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 11:57:38,418 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:38,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:38,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:38,482 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2018-11-18 11:57:38,508 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2018-11-18 11:57:38,508 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:38,510 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:38,512 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:38,512 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2018-11-18 11:57:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:57:38,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:57:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:57:38,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:57:38,705 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:38,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:38,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:38,740 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2018-11-18 11:57:38,751 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2018-11-18 11:57:38,751 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:38,753 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:38,754 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:38,755 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2018-11-18 11:57:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:57:38,760 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:57:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:57:38,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 11:57:38,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 13 [2018-11-18 11:57:38,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 11:57:38,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 11:57:38,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-11-18 11:57:38,827 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 13 states. [2018-11-18 11:57:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:57:39,134 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2018-11-18 11:57:39,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 11:57:39,135 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2018-11-18 11:57:39,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:57:39,136 INFO L225 Difference]: With dead ends: 57 [2018-11-18 11:57:39,136 INFO L226 Difference]: Without dead ends: 45 [2018-11-18 11:57:39,137 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2018-11-18 11:57:39,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-18 11:57:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2018-11-18 11:57:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-18 11:57:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2018-11-18 11:57:39,142 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 31 [2018-11-18 11:57:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:57:39,143 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2018-11-18 11:57:39,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 11:57:39,143 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2018-11-18 11:57:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 11:57:39,143 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:57:39,143 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:39,144 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:57:39,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:39,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1785112779, now seen corresponding path program 1 times [2018-11-18 11:57:39,144 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 11:57:39,144 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:39,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:39,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:39,278 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-11-18 11:57:39,281 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-11-18 11:57:39,281 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:39,284 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:39,295 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:39,295 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:24 [2018-11-18 11:57:39,329 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2018-11-18 11:57:39,333 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 12 [2018-11-18 11:57:39,333 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:39,342 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:39,349 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:39,349 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:31, output treesize:12 [2018-11-18 11:57:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:39,379 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 11:57:39,382 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:57:39,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-11-18 11:57:39,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 11:57:39,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 11:57:39,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-18 11:57:39,383 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 10 states. [2018-11-18 11:57:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:57:39,837 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2018-11-18 11:57:39,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 11:57:39,837 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2018-11-18 11:57:39,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:57:39,838 INFO L225 Difference]: With dead ends: 55 [2018-11-18 11:57:39,838 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 11:57:39,839 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-11-18 11:57:39,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 11:57:39,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2018-11-18 11:57:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 11:57:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-11-18 11:57:39,846 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 31 [2018-11-18 11:57:39,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:57:39,847 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2018-11-18 11:57:39,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 11:57:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2018-11-18 11:57:39,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-18 11:57:39,848 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:57:39,848 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:39,848 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:57:39,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:39,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2112183458, now seen corresponding path program 1 times [2018-11-18 11:57:39,849 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 11:57:39,849 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:39,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:39,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:40,029 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-11-18 11:57:40,032 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-11-18 11:57:40,033 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:40,038 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:40,058 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:40,058 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2018-11-18 11:57:40,186 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2018-11-18 11:57:40,190 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 9 [2018-11-18 11:57:40,190 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:40,196 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:40,205 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:40,206 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:12 [2018-11-18 11:57:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:40,239 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:57:40,448 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2018-11-18 11:57:40,452 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2018-11-18 11:57:40,452 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:40,460 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:40,480 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-11-18 11:57:40,481 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:70, output treesize:7 [2018-11-18 11:57:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:40,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:57:40,707 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:40,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:40,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:40,747 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-11-18 11:57:40,751 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-11-18 11:57:40,751 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:40,757 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:40,775 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:40,776 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2018-11-18 11:57:40,831 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2018-11-18 11:57:40,835 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 9 [2018-11-18 11:57:40,836 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:40,844 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:40,856 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:40,856 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:12 [2018-11-18 11:57:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:40,861 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:57:40,948 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2018-11-18 11:57:40,952 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 12 [2018-11-18 11:57:40,953 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:40,962 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:40,983 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-11-18 11:57:40,983 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:64, output treesize:7 [2018-11-18 11:57:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:41,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 11:57:41,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13, 12] total 23 [2018-11-18 11:57:41,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-18 11:57:41,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-18 11:57:41,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2018-11-18 11:57:41,078 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 23 states. [2018-11-18 11:57:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:57:42,532 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2018-11-18 11:57:42,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-18 11:57:42,533 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 34 [2018-11-18 11:57:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:57:42,534 INFO L225 Difference]: With dead ends: 69 [2018-11-18 11:57:42,534 INFO L226 Difference]: Without dead ends: 62 [2018-11-18 11:57:42,535 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 11:57:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-18 11:57:42,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2018-11-18 11:57:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-18 11:57:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2018-11-18 11:57:42,540 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2018-11-18 11:57:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:57:42,541 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2018-11-18 11:57:42,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-18 11:57:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2018-11-18 11:57:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 11:57:42,542 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:57:42,542 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:42,542 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:57:42,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:42,542 INFO L82 PathProgramCache]: Analyzing trace with hash 811758571, now seen corresponding path program 1 times [2018-11-18 11:57:42,542 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 11:57:42,543 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:42,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:42,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:42,698 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-11-18 11:57:42,702 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-11-18 11:57:42,702 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:42,707 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:42,730 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:42,730 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2018-11-18 11:57:42,826 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2018-11-18 11:57:42,829 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 9 [2018-11-18 11:57:42,829 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:42,836 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:42,854 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:42,854 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:12 [2018-11-18 11:57:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:42,894 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:57:43,095 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2018-11-18 11:57:43,098 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2018-11-18 11:57:43,099 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:43,102 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:43,116 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-11-18 11:57:43,117 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2018-11-18 11:57:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:43,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:57:43,361 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:43,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:43,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:43,410 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-11-18 11:57:43,414 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-11-18 11:57:43,414 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:43,418 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:43,433 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:43,434 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2018-11-18 11:57:43,597 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2018-11-18 11:57:43,600 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 9 [2018-11-18 11:57:43,600 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:43,604 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:43,613 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:43,613 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:12 [2018-11-18 11:57:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:43,617 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:57:43,940 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2018-11-18 11:57:43,945 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 12 [2018-11-18 11:57:43,945 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:43,956 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:43,979 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-11-18 11:57:43,979 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:72, output treesize:7 [2018-11-18 11:57:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:44,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 11:57:44,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 14, 13] total 27 [2018-11-18 11:57:44,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-18 11:57:44,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-18 11:57:44,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2018-11-18 11:57:44,068 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 27 states. [2018-11-18 11:57:46,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:57:46,475 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2018-11-18 11:57:46,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-18 11:57:46,475 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 37 [2018-11-18 11:57:46,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:57:46,476 INFO L225 Difference]: With dead ends: 79 [2018-11-18 11:57:46,476 INFO L226 Difference]: Without dead ends: 72 [2018-11-18 11:57:46,477 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=444, Invalid=1812, Unknown=0, NotChecked=0, Total=2256 [2018-11-18 11:57:46,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-18 11:57:46,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2018-11-18 11:57:46,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-18 11:57:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-11-18 11:57:46,486 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 37 [2018-11-18 11:57:46,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:57:46,486 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-11-18 11:57:46,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-18 11:57:46,486 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-11-18 11:57:46,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 11:57:46,488 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:57:46,488 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:46,488 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:57:46,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:46,489 INFO L82 PathProgramCache]: Analyzing trace with hash 227528071, now seen corresponding path program 2 times [2018-11-18 11:57:46,489 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 11:57:46,489 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:46,509 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-18 11:57:46,608 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 11:57:46,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:57:46,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:46,656 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-11-18 11:57:46,659 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-11-18 11:57:46,659 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:46,663 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:46,685 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:46,685 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2018-11-18 11:57:47,078 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2018-11-18 11:57:47,081 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 9 [2018-11-18 11:57:47,081 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:47,086 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:47,094 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:47,094 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:12 [2018-11-18 11:57:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:57:47,141 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:57:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:47,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:57:47,829 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:47,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 11:57:47,888 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 11:57:47,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:57:47,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:47,990 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-11-18 11:57:47,993 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-11-18 11:57:47,994 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:47,997 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:48,013 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:48,013 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2018-11-18 11:57:48,052 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2018-11-18 11:57:48,055 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 9 [2018-11-18 11:57:48,055 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:48,062 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:48,073 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:48,073 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:12 [2018-11-18 11:57:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:57:48,079 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:57:48,345 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-11-18 11:57:48,346 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:48,346 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:48,346 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:1 [2018-11-18 11:57:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:48,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 11:57:48,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 14, 9] total 30 [2018-11-18 11:57:48,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-18 11:57:48,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-18 11:57:48,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2018-11-18 11:57:48,381 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 30 states. [2018-11-18 11:57:49,681 WARN L180 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2018-11-18 11:57:49,896 WARN L180 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2018-11-18 11:57:51,291 WARN L180 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2018-11-18 11:57:51,532 WARN L180 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2018-11-18 11:57:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:57:52,558 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2018-11-18 11:57:52,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-18 11:57:52,558 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 43 [2018-11-18 11:57:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:57:52,559 INFO L225 Difference]: With dead ends: 114 [2018-11-18 11:57:52,559 INFO L226 Difference]: Without dead ends: 107 [2018-11-18 11:57:52,560 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=830, Invalid=2952, Unknown=0, NotChecked=0, Total=3782 [2018-11-18 11:57:52,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-11-18 11:57:52,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 67. [2018-11-18 11:57:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-18 11:57:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2018-11-18 11:57:52,574 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 43 [2018-11-18 11:57:52,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:57:52,574 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2018-11-18 11:57:52,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-18 11:57:52,575 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2018-11-18 11:57:52,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-18 11:57:52,575 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:57:52,575 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:52,576 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:57:52,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:52,576 INFO L82 PathProgramCache]: Analyzing trace with hash 827287456, now seen corresponding path program 1 times [2018-11-18 11:57:52,576 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 11:57:52,576 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:52,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:57:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:52,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:52,644 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2018-11-18 11:57:52,653 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2018-11-18 11:57:52,654 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:52,655 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:52,656 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:52,656 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2018-11-18 11:57:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-18 11:57:52,717 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:57:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-18 11:57:52,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:57:52,786 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:52,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:52,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:52,827 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2018-11-18 11:57:52,837 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2018-11-18 11:57:52,837 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:52,839 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:52,841 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:52,841 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2018-11-18 11:57:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-18 11:57:52,845 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:57:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-18 11:57:52,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 11:57:52,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 13 [2018-11-18 11:57:52,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 11:57:52,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 11:57:52,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-11-18 11:57:52,902 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 13 states. [2018-11-18 11:57:53,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:57:53,171 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2018-11-18 11:57:53,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 11:57:53,172 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2018-11-18 11:57:53,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:57:53,173 INFO L225 Difference]: With dead ends: 117 [2018-11-18 11:57:53,173 INFO L226 Difference]: Without dead ends: 90 [2018-11-18 11:57:53,173 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2018-11-18 11:57:53,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-11-18 11:57:53,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2018-11-18 11:57:53,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-18 11:57:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2018-11-18 11:57:53,186 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 46 [2018-11-18 11:57:53,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:57:53,186 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2018-11-18 11:57:53,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 11:57:53,187 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2018-11-18 11:57:53,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-18 11:57:53,187 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:57:53,187 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:53,188 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:57:53,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:53,188 INFO L82 PathProgramCache]: Analyzing trace with hash -672824789, now seen corresponding path program 2 times [2018-11-18 11:57:53,188 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 11:57:53,188 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:53,200 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-18 11:57:53,302 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 11:57:53,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:57:53,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:53,357 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2018-11-18 11:57:53,361 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2018-11-18 11:57:53,361 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:53,365 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:53,387 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:53,387 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:48, output treesize:44 [2018-11-18 11:57:54,146 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2018-11-18 11:57:54,150 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 9 [2018-11-18 11:57:54,150 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:54,155 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:54,165 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:54,165 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:48, output treesize:15 [2018-11-18 11:57:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 3 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:57:54,231 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:57:55,348 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-11-18 11:57:55,348 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:55,348 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:55,349 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:77, output treesize:1 [2018-11-18 11:57:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:55,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:57:55,389 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:57:55,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 11:57:55,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 11:57:55,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:57:55,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:55,637 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-11-18 11:57:55,641 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-11-18 11:57:55,642 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:55,645 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:55,662 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:57:55,662 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2018-11-18 11:57:56,451 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2018-11-18 11:57:56,454 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 9 [2018-11-18 11:57:56,455 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:56,460 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:56,468 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:56,468 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:12 [2018-11-18 11:57:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 3 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:57:56,549 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:57:57,269 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-11-18 11:57:57,269 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 11:57:57,270 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:57:57,270 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:1 [2018-11-18 11:57:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:57,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 11:57:57,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 16, 11] total 45 [2018-11-18 11:57:57,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-18 11:57:57,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-18 11:57:57,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2018-11-18 11:57:57,302 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 45 states. [2018-11-18 11:57:57,905 WARN L180 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2018-11-18 11:57:58,234 WARN L180 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2018-11-18 11:57:58,574 WARN L180 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2018-11-18 11:57:58,883 WARN L180 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2018-11-18 11:57:59,207 WARN L180 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2018-11-18 11:57:59,401 WARN L180 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2018-11-18 11:58:02,650 WARN L180 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2018-11-18 11:58:03,015 WARN L180 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2018-11-18 11:58:03,373 WARN L180 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2018-11-18 11:58:03,719 WARN L180 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2018-11-18 11:58:04,086 WARN L180 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-11-18 11:58:04,371 WARN L180 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2018-11-18 11:58:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:58:05,942 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2018-11-18 11:58:05,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-18 11:58:05,943 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 49 [2018-11-18 11:58:05,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:58:05,943 INFO L225 Difference]: With dead ends: 125 [2018-11-18 11:58:05,943 INFO L226 Difference]: Without dead ends: 118 [2018-11-18 11:58:05,944 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2370 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1487, Invalid=6345, Unknown=0, NotChecked=0, Total=7832 [2018-11-18 11:58:05,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-11-18 11:58:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 101. [2018-11-18 11:58:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-11-18 11:58:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2018-11-18 11:58:05,964 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 49 [2018-11-18 11:58:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:58:05,964 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2018-11-18 11:58:05,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-18 11:58:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2018-11-18 11:58:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 11:58:05,965 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:58:05,965 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:58:05,965 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:58:05,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:58:05,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1638756327, now seen corresponding path program 3 times [2018-11-18 11:58:05,965 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 11:58:05,965 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:58:05,978 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-18 11:58:06,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-11-18 11:58:06,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:58:06,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:58:06,685 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2018-11-18 11:58:06,689 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2018-11-18 11:58:06,689 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:58:06,695 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:58:06,717 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:58:06,717 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:48, output treesize:44 [2018-11-18 11:58:07,571 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2018-11-18 11:58:07,574 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 7 [2018-11-18 11:58:07,574 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:58:07,578 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:58:07,585 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:58:07,585 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:46, output treesize:13 [2018-11-18 11:58:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 3 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:58:07,652 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:58:08,997 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-11-18 11:58:08,997 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 11:58:08,998 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:58:08,998 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:1 [2018-11-18 11:58:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:58:09,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:58:09,042 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:58:09,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 11:58:09,233 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-11-18 11:58:09,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:58:09,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:58:09,364 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-11-18 11:58:09,369 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-11-18 11:58:09,370 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:58:09,379 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:58:09,403 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 11:58:09,403 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2018-11-18 11:58:11,150 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2018-11-18 11:58:11,154 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 7 [2018-11-18 11:58:11,154 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 11:58:11,158 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:58:11,164 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:58:11,165 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:10 [2018-11-18 11:58:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 3 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:58:11,234 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:58:11,246 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-11-18 11:58:11,246 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 11:58:11,246 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 11:58:11,246 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:1 [2018-11-18 11:58:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:58:11,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 11:58:11,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 20, 15] total 48 [2018-11-18 11:58:11,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-11-18 11:58:11,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-11-18 11:58:11,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1860, Unknown=0, NotChecked=0, Total=2256 [2018-11-18 11:58:11,280 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 48 states. [2018-11-18 11:58:14,846 WARN L180 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2018-11-18 11:58:15,260 WARN L180 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2018-11-18 11:58:15,938 WARN L180 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2018-11-18 11:58:16,720 WARN L180 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2018-11-18 11:58:17,294 WARN L180 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2018-11-18 11:58:17,884 WARN L180 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2018-11-18 11:58:18,319 WARN L180 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2018-11-18 11:58:18,759 WARN L180 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2018-11-18 11:58:19,280 WARN L180 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2018-11-18 11:58:19,721 WARN L180 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2018-11-18 11:58:20,160 WARN L180 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2018-11-18 11:58:20,546 WARN L180 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2018-11-18 11:58:20,913 WARN L180 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2018-11-18 11:58:21,229 WARN L180 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2018-11-18 11:58:23,612 WARN L180 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2018-11-18 11:58:24,224 WARN L180 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2018-11-18 11:58:24,926 WARN L180 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2018-11-18 11:58:25,528 WARN L180 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2018-11-18 11:58:26,020 WARN L180 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2018-11-18 11:58:26,538 WARN L180 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2018-11-18 11:58:27,108 WARN L180 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2018-11-18 11:58:27,573 WARN L180 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2018-11-18 11:58:28,005 WARN L180 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2018-11-18 11:58:28,371 WARN L180 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2018-11-18 11:58:28,762 WARN L180 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2018-11-18 11:58:29,101 WARN L180 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2018-11-18 11:58:29,434 WARN L180 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2018-11-18 11:58:29,736 WARN L180 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2018-11-18 11:58:31,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:58:31,161 INFO L93 Difference]: Finished difference Result 161 states and 177 transitions. [2018-11-18 11:58:31,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-11-18 11:58:31,162 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 61 [2018-11-18 11:58:31,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:58:31,163 INFO L225 Difference]: With dead ends: 161 [2018-11-18 11:58:31,163 INFO L226 Difference]: Without dead ends: 154 [2018-11-18 11:58:31,165 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=2208, Invalid=11132, Unknown=0, NotChecked=0, Total=13340 [2018-11-18 11:58:31,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-11-18 11:58:31,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 137. [2018-11-18 11:58:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-11-18 11:58:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2018-11-18 11:58:31,193 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 61 [2018-11-18 11:58:31,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:58:31,193 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2018-11-18 11:58:31,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-11-18 11:58:31,193 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2018-11-18 11:58:31,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-18 11:58:31,194 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:58:31,194 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:58:31,194 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:58:31,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:58:31,195 INFO L82 PathProgramCache]: Analyzing trace with hash -729230846, now seen corresponding path program 4 times [2018-11-18 11:58:31,195 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 11:58:31,195 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a22e9626-d272-43a5-878f-59d025c94a3c/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 11:58:31,208 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 11:58:31,415 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 11:58:31,416 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: ConstantTerm is neither BigInter nor BigDecimal, therefore comparison is not possible! at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.termHasConstantGreaterThan(AnnotateAndAsserterWithStmtOrderPrioritization.java:358) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.termHasConstantGreaterThan(AnnotateAndAsserterWithStmtOrderPrioritization.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.termHasConstantGreaterThan(AnnotateAndAsserterWithStmtOrderPrioritization.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.termHasConstantGreaterThan(AnnotateAndAsserterWithStmtOrderPrioritization.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.termHasConstantGreaterThan(AnnotateAndAsserterWithStmtOrderPrioritization.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.termHasConstantGreaterThan(AnnotateAndAsserterWithStmtOrderPrioritization.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.partitionStmtsAccordingToConstantSize(AnnotateAndAsserterWithStmtOrderPrioritization.java:377) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.annotateAndAssertStmtsAccording5Heuristic(AnnotateAndAsserterWithStmtOrderPrioritization.java:391) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.buildAnnotatedSsaAndAssertTerms(AnnotateAndAsserterWithStmtOrderPrioritization.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.checkTrace(TraceCheck.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheck.(TraceCheck.java:214) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) 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) [2018-11-18 11:58:31,420 INFO L168 Benchmark]: Toolchain (without parser) took 54752.69 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 354.4 MB). Free memory was 953.2 MB in the beginning and 1.2 GB in the end (delta: -246.7 MB). Peak memory consumption was 107.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:58:31,421 INFO L168 Benchmark]: CDTParser took 0.13 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 11:58:31,421 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.71 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 937.1 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-18 11:58:31,422 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.24 ms. Allocated memory is still 1.0 GB. Free memory is still 937.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:58:31,422 INFO L168 Benchmark]: Boogie Preprocessor took 23.08 ms. Allocated memory is still 1.0 GB. Free memory is still 937.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:58:31,422 INFO L168 Benchmark]: RCFGBuilder took 268.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -194.4 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. [2018-11-18 11:58:31,423 INFO L168 Benchmark]: TraceAbstraction took 54265.17 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 191.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -68.4 MB). Peak memory consumption was 123.5 MB. Max. memory is 11.5 GB. [2018-11-18 11:58:31,426 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 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 176.71 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 937.1 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.24 ms. Allocated memory is still 1.0 GB. Free memory is still 937.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.08 ms. Allocated memory is still 1.0 GB. Free memory is still 937.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 268.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -194.4 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 54265.17 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 191.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -68.4 MB). Peak memory consumption was 123.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: ConstantTerm is neither BigInter nor BigDecimal, therefore comparison is not possible! de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: ConstantTerm is neither BigInter nor BigDecimal, therefore comparison is not possible!: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.termHasConstantGreaterThan(AnnotateAndAsserterWithStmtOrderPrioritization.java:358) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...