./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/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 65a8838494b0fa2a560742eb829642f08a5d8cc8 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/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 65a8838494b0fa2a560742eb829642f08a5d8cc8 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 04:51:14,948 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 04:51:14,949 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 04:51:14,955 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 04:51:14,956 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 04:51:14,956 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 04:51:14,957 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 04:51:14,958 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 04:51:14,959 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 04:51:14,959 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 04:51:14,960 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 04:51:14,960 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 04:51:14,961 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 04:51:14,961 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 04:51:14,962 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 04:51:14,963 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 04:51:14,963 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 04:51:14,964 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 04:51:14,966 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 04:51:14,967 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 04:51:14,967 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 04:51:14,968 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 04:51:14,970 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 04:51:14,970 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 04:51:14,970 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 04:51:14,971 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 04:51:14,971 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 04:51:14,972 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 04:51:14,972 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 04:51:14,973 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 04:51:14,973 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 04:51:14,974 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 04:51:14,974 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 04:51:14,974 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 04:51:14,974 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 04:51:14,975 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 04:51:14,975 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-10 04:51:14,985 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 04:51:14,985 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 04:51:14,986 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 04:51:14,986 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 04:51:14,986 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 04:51:14,986 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 04:51:14,986 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 04:51:14,986 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 04:51:14,986 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 04:51:14,986 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 04:51:14,986 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 04:51:14,987 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 04:51:14,987 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 04:51:14,987 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 04:51:14,987 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 04:51:14,987 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 04:51:14,988 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 04:51:14,988 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 04:51:14,988 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 04:51:14,988 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 04:51:14,988 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 04:51:14,988 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 04:51:14,988 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 04:51:14,988 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 04:51:14,989 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 04:51:14,989 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 04:51:14,989 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 04:51:14,989 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 04:51:14,989 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 04:51:14,989 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 04:51:14,989 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 04:51:14,989 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 04:51:14,989 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 04:51:14,989 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-10 04:51:14,990 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_41a93492-4e0b-4842-8b8a-b39c5f1a5960/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 -> 65a8838494b0fa2a560742eb829642f08a5d8cc8 [2018-11-10 04:51:15,012 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 04:51:15,021 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 04:51:15,024 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 04:51:15,025 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 04:51:15,025 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 04:51:15,026 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-11-10 04:51:15,068 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/data/8c209db0d/73d89c8dc64c47408821f9f2fb1b3924/FLAGda61be231 [2018-11-10 04:51:15,458 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 04:51:15,458 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-11-10 04:51:15,462 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/data/8c209db0d/73d89c8dc64c47408821f9f2fb1b3924/FLAGda61be231 [2018-11-10 04:51:15,471 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/data/8c209db0d/73d89c8dc64c47408821f9f2fb1b3924 [2018-11-10 04:51:15,474 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 04:51:15,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 04:51:15,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 04:51:15,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 04:51:15,478 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 04:51:15,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:51:15" (1/1) ... [2018-11-10 04:51:15,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1183f8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:15, skipping insertion in model container [2018-11-10 04:51:15,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:51:15" (1/1) ... [2018-11-10 04:51:15,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 04:51:15,506 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 04:51:15,642 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:51:15,645 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 04:51:15,665 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:51:15,682 INFO L193 MainTranslator]: Completed translation [2018-11-10 04:51:15,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:15 WrapperNode [2018-11-10 04:51:15,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 04:51:15,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 04:51:15,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 04:51:15,684 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 04:51:15,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:15" (1/1) ... [2018-11-10 04:51:15,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:15" (1/1) ... [2018-11-10 04:51:15,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 04:51:15,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 04:51:15,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 04:51:15,713 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 04:51:15,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:15" (1/1) ... [2018-11-10 04:51:15,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:15" (1/1) ... [2018-11-10 04:51:15,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:15" (1/1) ... [2018-11-10 04:51:15,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:15" (1/1) ... [2018-11-10 04:51:15,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:15" (1/1) ... [2018-11-10 04:51:15,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:15" (1/1) ... [2018-11-10 04:51:15,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:15" (1/1) ... [2018-11-10 04:51:15,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 04:51:15,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 04:51:15,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 04:51:15,769 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 04:51:15,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/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 [2018-11-10 04:51:15,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 04:51:15,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 04:51:15,807 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-11-10 04:51:15,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-11-10 04:51:15,808 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-11-10 04:51:15,808 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-11-10 04:51:15,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 04:51:15,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 04:51:15,808 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2018-11-10 04:51:15,808 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2018-11-10 04:51:15,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 04:51:15,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 04:51:16,037 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 04:51:16,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:51:16 BoogieIcfgContainer [2018-11-10 04:51:16,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 04:51:16,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 04:51:16,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 04:51:16,041 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 04:51:16,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 04:51:15" (1/3) ... [2018-11-10 04:51:16,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65462cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:51:16, skipping insertion in model container [2018-11-10 04:51:16,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:15" (2/3) ... [2018-11-10 04:51:16,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65462cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:51:16, skipping insertion in model container [2018-11-10 04:51:16,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:51:16" (3/3) ... [2018-11-10 04:51:16,044 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231_true-unreach-call.c [2018-11-10 04:51:16,049 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 04:51:16,054 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-11-10 04:51:16,063 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-11-10 04:51:16,084 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 04:51:16,084 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 04:51:16,084 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 04:51:16,084 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 04:51:16,084 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 04:51:16,084 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 04:51:16,084 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 04:51:16,084 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 04:51:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2018-11-10 04:51:16,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-10 04:51:16,101 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:16,102 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, 1, 1, 1, 1] [2018-11-10 04:51:16,103 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:16,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:16,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1281692302, now seen corresponding path program 1 times [2018-11-10 04:51:16,109 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:51:16,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:51:16,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:16,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:51:16,137 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:51:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 04:51:16,206 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:16,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 04:51:16,207 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:51:16,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 04:51:16,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 04:51:16,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 04:51:16,220 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2018-11-10 04:51:16,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:16,239 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions. [2018-11-10 04:51:16,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 04:51:16,240 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 36 [2018-11-10 04:51:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:16,246 INFO L225 Difference]: With dead ends: 109 [2018-11-10 04:51:16,246 INFO L226 Difference]: Without dead ends: 61 [2018-11-10 04:51:16,248 INFO L605 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 [2018-11-10 04:51:16,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-10 04:51:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-11-10 04:51:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-10 04:51:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-11-10 04:51:16,275 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-11-10 04:51:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:16,277 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-11-10 04:51:16,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 04:51:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-11-10 04:51:16,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-10 04:51:16,279 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:16,279 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, 1, 1, 1, 1, 1] [2018-11-10 04:51:16,279 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:16,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:16,279 INFO L82 PathProgramCache]: Analyzing trace with hash 461962661, now seen corresponding path program 1 times [2018-11-10 04:51:16,280 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:51:16,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:51:16,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:16,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:51:16,281 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:51:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 04:51:16,352 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:16,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:51:16,352 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:51:16,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:51:16,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:51:16,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:16,354 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-11-10 04:51:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:16,419 INFO L93 Difference]: Finished difference Result 112 states and 147 transitions. [2018-11-10 04:51:16,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 04:51:16,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-11-10 04:51:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:16,421 INFO L225 Difference]: With dead ends: 112 [2018-11-10 04:51:16,421 INFO L226 Difference]: Without dead ends: 70 [2018-11-10 04:51:16,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 04:51:16,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-11-10 04:51:16,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2018-11-10 04:51:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-10 04:51:16,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2018-11-10 04:51:16,431 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 37 [2018-11-10 04:51:16,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:16,431 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2018-11-10 04:51:16,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:51:16,432 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2018-11-10 04:51:16,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-10 04:51:16,433 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:16,433 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:16,433 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:16,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:16,433 INFO L82 PathProgramCache]: Analyzing trace with hash -324009546, now seen corresponding path program 1 times [2018-11-10 04:51:16,434 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:51:16,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:51:16,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:16,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:51:16,435 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:51:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 04:51:16,495 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:16,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:51:16,495 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:51:16,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:51:16,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:51:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:16,496 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2018-11-10 04:51:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:16,521 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2018-11-10 04:51:16,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:51:16,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-11-10 04:51:16,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:16,523 INFO L225 Difference]: With dead ends: 89 [2018-11-10 04:51:16,523 INFO L226 Difference]: Without dead ends: 67 [2018-11-10 04:51:16,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-10 04:51:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-11-10 04:51:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-10 04:51:16,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-11-10 04:51:16,530 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 42 [2018-11-10 04:51:16,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:16,531 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-11-10 04:51:16,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:51:16,531 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-11-10 04:51:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-10 04:51:16,532 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:16,532 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:16,532 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:16,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:16,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1729091641, now seen corresponding path program 1 times [2018-11-10 04:51:16,533 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:51:16,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:51:16,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:16,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:51:16,534 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:51:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 04:51:16,578 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:16,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 04:51:16,578 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:51:16,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 04:51:16,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 04:51:16,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 04:51:16,579 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 3 states. [2018-11-10 04:51:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:16,598 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2018-11-10 04:51:16,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 04:51:16,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2018-11-10 04:51:16,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:16,601 INFO L225 Difference]: With dead ends: 70 [2018-11-10 04:51:16,601 INFO L226 Difference]: Without dead ends: 68 [2018-11-10 04:51:16,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 04:51:16,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-10 04:51:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-11-10 04:51:16,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-10 04:51:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2018-11-10 04:51:16,606 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 45 [2018-11-10 04:51:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:16,606 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2018-11-10 04:51:16,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 04:51:16,607 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2018-11-10 04:51:16,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 04:51:16,608 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:16,608 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:16,608 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:16,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:16,608 INFO L82 PathProgramCache]: Analyzing trace with hash 931697841, now seen corresponding path program 1 times [2018-11-10 04:51:16,608 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:51:16,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:51:16,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:16,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:51:16,609 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:51:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 04:51:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 04:51:16,666 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 04:51:16,679 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:51:16,680 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:51:16,680 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:51:16,681 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:51:16,681 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:51:16,681 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:51:16,681 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:51:16,681 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:51:16,682 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:51:16,682 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:51:16,682 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:51:16,682 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:51:16,683 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:51:16,683 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:51:16,683 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:51:16,683 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:51:16,683 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:51:16,684 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:51:16,684 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:51:16,684 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:51:16,684 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:51:16,684 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:51:16,684 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:51:16,684 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:51:16,685 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:51:16,685 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:51:16,685 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:51:16,685 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:51:16,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 04:51:16 BoogieIcfgContainer [2018-11-10 04:51:16,700 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 04:51:16,700 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 04:51:16,700 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 04:51:16,700 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 04:51:16,700 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:51:16" (3/4) ... [2018-11-10 04:51:16,703 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-10 04:51:16,703 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 04:51:16,703 INFO L168 Benchmark]: Toolchain (without parser) took 1229.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 959.2 MB in the beginning and 1.0 GB in the end (delta: -80.3 MB). Peak memory consumption was 60.7 MB. Max. memory is 11.5 GB. [2018-11-10 04:51:16,704 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:51:16,705 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.70 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 04:51:16,705 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.68 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. [2018-11-10 04:51:16,705 INFO L168 Benchmark]: Boogie Preprocessor took 55.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -192.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2018-11-10 04:51:16,706 INFO L168 Benchmark]: RCFGBuilder took 268.73 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: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2018-11-10 04:51:16,706 INFO L168 Benchmark]: TraceAbstraction took 661.60 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: 75.2 MB). Peak memory consumption was 75.2 MB. Max. memory is 11.5 GB. [2018-11-10 04:51:16,707 INFO L168 Benchmark]: Witness Printer took 3.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:51:16,708 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 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 207.70 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.68 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 55.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -192.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 268.73 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: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 661.60 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: 75.2 MB). Peak memory consumption was 75.2 MB. Max. memory is 11.5 GB. * Witness Printer took 3.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 75]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 74. Possible FailurePath: [L66] float x = __VERIFIER_nondet_float(); [L67] float y = __VERIFIER_nondet_float(); [L68] CALL, EXPR isnan_float(x) VAL [\old(x)=4286578693] [L57] RET return x != x; VAL [\old(x)=4286578693, \result=1, x=4286578693] [L68] EXPR isnan_float(x) VAL [isnan_float(x)=1, x=4286578693, y=4286578692] [L68] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, x=4286578693, y=4286578692] [L68] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578692] [L57] RET return x != x; VAL [\old(x)=4286578692, \result=0, x=4286578692] [L68] EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578693, y=4286578692] [L68] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578693, y=4286578692] [L68-L69] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) VAL [(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))=1, isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578693, y=4286578692] [L68-L69] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L71] CALL, EXPR fmin_float(x, y) VAL [\old(x)=4286578693, \old(y)=4286578692] [L36] CALL, EXPR __fpclassify_float(x) [L13] __uint32_t w; [L16] CALL ieee_float_shape_type gf_u; [L16] RET ieee_float_shape_type gf_u; [L17] CALL gf_u.value = (x) [L17] RET gf_u.value = (x) [L18] CALL, EXPR gf_u.word [L18] RET, EXPR gf_u.word [L18] (w) = gf_u.word [L18] RET (w) = gf_u.word [L19] COND FALSE !(0) [L21] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L23-L24] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L26-L27] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L29] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L32] RET return 0; [L36] EXPR __fpclassify_float(x) VAL [\old(x)=4286578693, \old(y)=4286578692, __fpclassify_float(x)=0, x=4286578693, y=4286578692] [L36] COND TRUE __fpclassify_float(x) == 0 [L37] RET return y; VAL [\old(x)=4286578693, \old(y)=4286578692, \result=4286578692, x=4286578693, y=4286578692] [L71] EXPR fmin_float(x, y) VAL [fmin_float(x, y)=4286578692, x=4286578693, y=4286578692] [L71] float res = fmin_float(x, y); [L74] CALL, EXPR isnan_float(x) VAL [\old(x)=4286578693] [L57] RET return x != x; VAL [\old(x)=4286578693, \result=1, x=4286578693] [L74] EXPR isnan_float(x) VAL [isnan_float(x)=1, res=4286578692, x=4286578693, y=4286578692] [L74] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, res=4286578692, x=4286578693, y=4286578692] [L74] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578692] [L57] RET return x != x; VAL [\old(x)=4286578692, \result=0, x=4286578692] [L74] EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=4286578692, x=4286578693, y=4286578692] [L74] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=4286578692, x=4286578693, y=4286578692] [L74] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L75] __VERIFIER_error() VAL [res=4286578692, x=4286578693, y=4286578692] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 66 locations, 2 error locations. UNSAFE Result, 0.6s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 324 SDtfs, 16 SDslu, 367 SDs, 0 SdLazy, 28 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 210 NumberOfCodeBlocks, 210 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 156 ConstructedInterpolants, 0 QuantifiedInterpolants, 6582 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 24/24 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-1dbac8b [2018-11-10 04:51:18,100 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 04:51:18,101 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 04:51:18,110 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 04:51:18,110 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 04:51:18,111 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 04:51:18,111 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 04:51:18,113 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 04:51:18,114 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 04:51:18,114 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 04:51:18,115 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 04:51:18,115 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 04:51:18,116 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 04:51:18,116 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 04:51:18,117 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 04:51:18,118 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 04:51:18,118 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 04:51:18,119 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 04:51:18,121 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 04:51:18,122 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 04:51:18,122 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 04:51:18,123 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 04:51:18,125 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 04:51:18,125 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 04:51:18,125 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 04:51:18,126 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 04:51:18,126 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 04:51:18,127 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 04:51:18,128 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 04:51:18,128 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 04:51:18,129 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 04:51:18,129 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 04:51:18,129 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 04:51:18,129 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 04:51:18,130 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 04:51:18,130 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 04:51:18,131 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-11-10 04:51:18,141 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 04:51:18,141 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 04:51:18,142 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 04:51:18,142 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 04:51:18,142 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 04:51:18,142 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 04:51:18,142 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 04:51:18,142 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 04:51:18,143 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 04:51:18,143 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 04:51:18,143 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 04:51:18,143 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 04:51:18,143 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 04:51:18,143 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 04:51:18,144 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 04:51:18,144 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-10 04:51:18,144 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-10 04:51:18,144 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 04:51:18,144 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 04:51:18,144 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 04:51:18,144 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 04:51:18,145 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 04:51:18,145 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 04:51:18,145 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 04:51:18,145 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 04:51:18,145 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 04:51:18,145 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 04:51:18,145 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 04:51:18,146 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-11-10 04:51:18,146 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 04:51:18,146 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-10 04:51:18,146 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-10 04:51:18,146 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_41a93492-4e0b-4842-8b8a-b39c5f1a5960/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 -> 65a8838494b0fa2a560742eb829642f08a5d8cc8 [2018-11-10 04:51:18,175 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 04:51:18,184 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 04:51:18,186 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 04:51:18,187 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 04:51:18,188 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 04:51:18,188 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-11-10 04:51:18,231 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/data/936d33ee8/fa7fdd2b6ab34d5781b9c88ef9faf83e/FLAGaae55a1ab [2018-11-10 04:51:18,550 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 04:51:18,551 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-11-10 04:51:18,555 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/data/936d33ee8/fa7fdd2b6ab34d5781b9c88ef9faf83e/FLAGaae55a1ab [2018-11-10 04:51:18,563 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/data/936d33ee8/fa7fdd2b6ab34d5781b9c88ef9faf83e [2018-11-10 04:51:18,566 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 04:51:18,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 04:51:18,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 04:51:18,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 04:51:18,570 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 04:51:18,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:51:18" (1/1) ... [2018-11-10 04:51:18,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d68c770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:18, skipping insertion in model container [2018-11-10 04:51:18,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:51:18" (1/1) ... [2018-11-10 04:51:18,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 04:51:18,592 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 04:51:18,703 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:51:18,707 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 04:51:18,727 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:51:18,743 INFO L193 MainTranslator]: Completed translation [2018-11-10 04:51:18,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:18 WrapperNode [2018-11-10 04:51:18,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 04:51:18,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 04:51:18,745 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 04:51:18,745 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 04:51:18,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:18" (1/1) ... [2018-11-10 04:51:18,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:18" (1/1) ... [2018-11-10 04:51:18,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 04:51:18,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 04:51:18,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 04:51:18,773 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 04:51:18,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:18" (1/1) ... [2018-11-10 04:51:18,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:18" (1/1) ... [2018-11-10 04:51:18,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:18" (1/1) ... [2018-11-10 04:51:18,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:18" (1/1) ... [2018-11-10 04:51:18,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:18" (1/1) ... [2018-11-10 04:51:18,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:18" (1/1) ... [2018-11-10 04:51:18,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:18" (1/1) ... [2018-11-10 04:51:18,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 04:51:18,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 04:51:18,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 04:51:18,796 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 04:51:18,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/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 [2018-11-10 04:51:18,870 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 04:51:18,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 04:51:18,870 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-11-10 04:51:18,871 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-11-10 04:51:18,871 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-11-10 04:51:18,871 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-11-10 04:51:18,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 04:51:18,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 04:51:18,871 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2018-11-10 04:51:18,871 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2018-11-10 04:51:18,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 04:51:18,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 04:51:19,106 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 04:51:19,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:51:19 BoogieIcfgContainer [2018-11-10 04:51:19,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 04:51:19,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 04:51:19,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 04:51:19,110 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 04:51:19,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 04:51:18" (1/3) ... [2018-11-10 04:51:19,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21be0c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:51:19, skipping insertion in model container [2018-11-10 04:51:19,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:51:18" (2/3) ... [2018-11-10 04:51:19,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21be0c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:51:19, skipping insertion in model container [2018-11-10 04:51:19,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:51:19" (3/3) ... [2018-11-10 04:51:19,113 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231_true-unreach-call.c [2018-11-10 04:51:19,120 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 04:51:19,124 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-11-10 04:51:19,133 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-11-10 04:51:19,150 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 04:51:19,150 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 04:51:19,151 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 04:51:19,151 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 04:51:19,151 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 04:51:19,151 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 04:51:19,151 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 04:51:19,151 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 04:51:19,151 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 04:51:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-11-10 04:51:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-10 04:51:19,165 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:19,166 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, 1, 1, 1] [2018-11-10 04:51:19,167 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:19,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:19,170 INFO L82 PathProgramCache]: Analyzing trace with hash -86706027, now seen corresponding path program 1 times [2018-11-10 04:51:19,173 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:19,173 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:19,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:19,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:51:19,257 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:19,272 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:19,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 04:51:19,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 04:51:19,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 04:51:19,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 04:51:19,283 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-11-10 04:51:19,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:19,299 INFO L93 Difference]: Finished difference Result 105 states and 146 transitions. [2018-11-10 04:51:19,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 04:51:19,300 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 35 [2018-11-10 04:51:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:19,306 INFO L225 Difference]: With dead ends: 105 [2018-11-10 04:51:19,306 INFO L226 Difference]: Without dead ends: 59 [2018-11-10 04:51:19,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 04:51:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-10 04:51:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-11-10 04:51:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-10 04:51:19,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2018-11-10 04:51:19,341 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 35 [2018-11-10 04:51:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:19,342 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2018-11-10 04:51:19,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 04:51:19,342 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2018-11-10 04:51:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-10 04:51:19,343 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:19,344 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, 1, 1, 1, 1] [2018-11-10 04:51:19,344 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:19,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:19,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1458913920, now seen corresponding path program 1 times [2018-11-10 04:51:19,345 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:19,345 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:19,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:19,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:19,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:51:19,439 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:19,446 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:19,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:51:19,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:51:19,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:51:19,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:19,448 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2018-11-10 04:51:19,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:19,494 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2018-11-10 04:51:19,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 04:51:19,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-11-10 04:51:19,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:19,496 INFO L225 Difference]: With dead ends: 108 [2018-11-10 04:51:19,497 INFO L226 Difference]: Without dead ends: 68 [2018-11-10 04:51:19,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 04:51:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-10 04:51:19,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2018-11-10 04:51:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-10 04:51:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-11-10 04:51:19,506 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-11-10 04:51:19,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:19,507 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-11-10 04:51:19,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:51:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-11-10 04:51:19,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-10 04:51:19,508 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:19,508 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:19,509 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:19,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:19,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1017482765, now seen corresponding path program 1 times [2018-11-10 04:51:19,509 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:19,509 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:19,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:19,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 04:51:19,576 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:19,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:19,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:51:19,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:51:19,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:51:19,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:19,586 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-11-10 04:51:19,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:19,619 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2018-11-10 04:51:19,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:51:19,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-11-10 04:51:19,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:19,622 INFO L225 Difference]: With dead ends: 86 [2018-11-10 04:51:19,622 INFO L226 Difference]: Without dead ends: 64 [2018-11-10 04:51:19,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:19,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-10 04:51:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-11-10 04:51:19,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-10 04:51:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-10 04:51:19,627 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 41 [2018-11-10 04:51:19,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:19,628 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-10 04:51:19,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:51:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-10 04:51:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-10 04:51:19,628 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:19,628 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:19,629 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:19,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:19,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2083142891, now seen corresponding path program 1 times [2018-11-10 04:51:19,629 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:19,629 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:19,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:19,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 04:51:19,686 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:19,692 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:19,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:51:19,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:51:19,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:51:19,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:19,693 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-11-10 04:51:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:19,716 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-10 04:51:19,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:51:19,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-11-10 04:51:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:19,718 INFO L225 Difference]: With dead ends: 89 [2018-11-10 04:51:19,718 INFO L226 Difference]: Without dead ends: 67 [2018-11-10 04:51:19,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:19,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-10 04:51:19,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-10 04:51:19,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-10 04:51:19,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-10 04:51:19,725 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 42 [2018-11-10 04:51:19,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:19,725 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-10 04:51:19,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:51:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-10 04:51:19,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-10 04:51:19,726 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:19,726 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:19,727 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:19,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:19,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1800858927, now seen corresponding path program 1 times [2018-11-10 04:51:19,727 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:19,727 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:19,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:19,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 04:51:19,786 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:19,797 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:19,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:51:19,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:51:19,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:51:19,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:19,798 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-11-10 04:51:19,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:19,815 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-10 04:51:19,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:51:19,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-11-10 04:51:19,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:19,817 INFO L225 Difference]: With dead ends: 89 [2018-11-10 04:51:19,817 INFO L226 Difference]: Without dead ends: 67 [2018-11-10 04:51:19,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-10 04:51:19,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-10 04:51:19,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-10 04:51:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-10 04:51:19,823 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 43 [2018-11-10 04:51:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:19,823 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-10 04:51:19,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:51:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-10 04:51:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-10 04:51:19,825 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:19,825 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:19,825 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:19,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:19,825 INFO L82 PathProgramCache]: Analyzing trace with hash -210591057, now seen corresponding path program 1 times [2018-11-10 04:51:19,826 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:19,826 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:19,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:19,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 04:51:19,880 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:19,886 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:19,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:51:19,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:51:19,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:51:19,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:19,887 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-11-10 04:51:19,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:19,902 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-10 04:51:19,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:51:19,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-11-10 04:51:19,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:19,904 INFO L225 Difference]: With dead ends: 89 [2018-11-10 04:51:19,904 INFO L226 Difference]: Without dead ends: 67 [2018-11-10 04:51:19,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-10 04:51:19,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-10 04:51:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-10 04:51:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-10 04:51:19,910 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 44 [2018-11-10 04:51:19,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:19,911 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-10 04:51:19,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:51:19,911 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-10 04:51:19,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-10 04:51:19,912 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:19,912 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:19,912 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:19,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:19,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1296960752, now seen corresponding path program 1 times [2018-11-10 04:51:19,913 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:19,913 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:19,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:19,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 04:51:20,093 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 04:51:20,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:51:20,331 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:51:20,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:20,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 04:51:20,381 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:20,397 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:51:20,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 14 [2018-11-10 04:51:20,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 04:51:20,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 04:51:20,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-11-10 04:51:20,399 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 14 states. [2018-11-10 04:51:20,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:20,789 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2018-11-10 04:51:20,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 04:51:20,789 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2018-11-10 04:51:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:20,790 INFO L225 Difference]: With dead ends: 105 [2018-11-10 04:51:20,790 INFO L226 Difference]: Without dead ends: 91 [2018-11-10 04:51:20,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-11-10 04:51:20,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-11-10 04:51:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2018-11-10 04:51:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-11-10 04:51:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2018-11-10 04:51:20,796 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 44 [2018-11-10 04:51:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:20,797 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2018-11-10 04:51:20,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 04:51:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2018-11-10 04:51:20,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 04:51:20,798 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:20,798 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:20,798 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:20,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:20,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2142927640, now seen corresponding path program 1 times [2018-11-10 04:51:20,798 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:20,798 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:20,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:20,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-10 04:51:20,992 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-10 04:51:21,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:51:21,334 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:51:21,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:21,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-10 04:51:21,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-10 04:51:21,887 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2018-11-10 04:51:21,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11, 11] total 29 [2018-11-10 04:51:21,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-10 04:51:21,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-10 04:51:21,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2018-11-10 04:51:21,889 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand 29 states. [2018-11-10 04:51:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:23,739 INFO L93 Difference]: Finished difference Result 136 states and 179 transitions. [2018-11-10 04:51:23,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-10 04:51:23,739 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 49 [2018-11-10 04:51:23,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:23,741 INFO L225 Difference]: With dead ends: 136 [2018-11-10 04:51:23,741 INFO L226 Difference]: Without dead ends: 134 [2018-11-10 04:51:23,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2018-11-10 04:51:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-10 04:51:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2018-11-10 04:51:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-10 04:51:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2018-11-10 04:51:23,754 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 49 [2018-11-10 04:51:23,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:23,754 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2018-11-10 04:51:23,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-10 04:51:23,755 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2018-11-10 04:51:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-10 04:51:23,757 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:23,757 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:23,757 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:23,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:23,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1946883653, now seen corresponding path program 1 times [2018-11-10 04:51:23,758 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:23,758 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:23,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:23,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-10 04:51:23,872 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:23,879 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:23,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 04:51:23,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 04:51:23,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 04:51:23,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-10 04:51:23,880 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand 8 states. [2018-11-10 04:51:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:24,140 INFO L93 Difference]: Finished difference Result 158 states and 208 transitions. [2018-11-10 04:51:24,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 04:51:24,141 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2018-11-10 04:51:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:24,142 INFO L225 Difference]: With dead ends: 158 [2018-11-10 04:51:24,142 INFO L226 Difference]: Without dead ends: 105 [2018-11-10 04:51:24,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-10 04:51:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-11-10 04:51:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2018-11-10 04:51:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-10 04:51:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2018-11-10 04:51:24,152 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 53 [2018-11-10 04:51:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:24,152 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2018-11-10 04:51:24,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 04:51:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2018-11-10 04:51:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-10 04:51:24,153 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:24,153 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:24,154 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:24,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:24,154 INFO L82 PathProgramCache]: Analyzing trace with hash -164674720, now seen corresponding path program 1 times [2018-11-10 04:51:24,154 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:24,154 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:24,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:24,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-10 04:51:24,267 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-10 04:51:24,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:51:24,441 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/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 [2018-11-10 04:51:24,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:24,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-10 04:51:24,472 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:24,487 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:51:24,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 13 [2018-11-10 04:51:24,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 04:51:24,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 04:51:24,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-11-10 04:51:24,488 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand 13 states. [2018-11-10 04:51:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:24,768 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2018-11-10 04:51:24,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 04:51:24,769 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2018-11-10 04:51:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:24,769 INFO L225 Difference]: With dead ends: 110 [2018-11-10 04:51:24,769 INFO L226 Difference]: Without dead ends: 106 [2018-11-10 04:51:24,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-11-10 04:51:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-11-10 04:51:24,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2018-11-10 04:51:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-10 04:51:24,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2018-11-10 04:51:24,776 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 58 [2018-11-10 04:51:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:24,776 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2018-11-10 04:51:24,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 04:51:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2018-11-10 04:51:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-10 04:51:24,777 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:24,777 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:24,777 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:24,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:24,778 INFO L82 PathProgramCache]: Analyzing trace with hash -85989605, now seen corresponding path program 1 times [2018-11-10 04:51:24,778 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:24,778 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:24,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:24,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-10 04:51:24,871 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:24,878 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:24,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:51:24,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:51:24,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:51:24,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:24,879 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand 4 states. [2018-11-10 04:51:24,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:24,892 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2018-11-10 04:51:24,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:51:24,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2018-11-10 04:51:24,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:24,893 INFO L225 Difference]: With dead ends: 119 [2018-11-10 04:51:24,893 INFO L226 Difference]: Without dead ends: 92 [2018-11-10 04:51:24,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:24,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-11-10 04:51:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-11-10 04:51:24,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-10 04:51:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-11-10 04:51:24,902 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 61 [2018-11-10 04:51:24,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:24,902 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-11-10 04:51:24,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:51:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-11-10 04:51:24,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-11-10 04:51:24,903 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:24,903 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:24,903 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:24,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:24,904 INFO L82 PathProgramCache]: Analyzing trace with hash -633628381, now seen corresponding path program 1 times [2018-11-10 04:51:24,904 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:24,904 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:24,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:24,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-10 04:51:24,974 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:24,981 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:24,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:51:24,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:51:24,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:51:24,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:24,982 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 4 states. [2018-11-10 04:51:24,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:24,996 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2018-11-10 04:51:24,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:51:24,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2018-11-10 04:51:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:24,998 INFO L225 Difference]: With dead ends: 122 [2018-11-10 04:51:24,998 INFO L226 Difference]: Without dead ends: 95 [2018-11-10 04:51:24,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:24,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-10 04:51:25,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2018-11-10 04:51:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-10 04:51:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-11-10 04:51:25,004 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 62 [2018-11-10 04:51:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:25,005 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-11-10 04:51:25,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:51:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-11-10 04:51:25,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-10 04:51:25,005 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:25,005 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:25,006 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:25,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1339170752, now seen corresponding path program 1 times [2018-11-10 04:51:25,006 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:25,006 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:25,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:25,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 04:51:25,230 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:25,238 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:25,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-11-10 04:51:25,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 04:51:25,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 04:51:25,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-10 04:51:25,239 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 9 states. [2018-11-10 04:51:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:25,937 INFO L93 Difference]: Finished difference Result 147 states and 189 transitions. [2018-11-10 04:51:25,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 04:51:25,938 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2018-11-10 04:51:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:25,939 INFO L225 Difference]: With dead ends: 147 [2018-11-10 04:51:25,939 INFO L226 Difference]: Without dead ends: 122 [2018-11-10 04:51:25,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-11-10 04:51:25,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-11-10 04:51:25,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2018-11-10 04:51:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-11-10 04:51:25,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2018-11-10 04:51:25,948 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 63 [2018-11-10 04:51:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:25,948 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2018-11-10 04:51:25,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 04:51:25,949 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2018-11-10 04:51:25,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-10 04:51:25,951 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:25,951 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:25,951 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:25,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:25,951 INFO L82 PathProgramCache]: Analyzing trace with hash 961651838, now seen corresponding path program 1 times [2018-11-10 04:51:25,951 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:25,952 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:25,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:26,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-10 04:51:26,060 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-10 04:51:26,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:51:26,239 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:51:26,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:26,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 04:51:26,317 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:26,556 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-10 04:51:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-10 04:51:26,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 04:51:26,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 12] total 17 [2018-11-10 04:51:26,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 04:51:26,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 04:51:26,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-11-10 04:51:26,578 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand 17 states. [2018-11-10 04:51:27,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:27,014 INFO L93 Difference]: Finished difference Result 137 states and 176 transitions. [2018-11-10 04:51:27,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 04:51:27,014 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-11-10 04:51:27,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:27,015 INFO L225 Difference]: With dead ends: 137 [2018-11-10 04:51:27,015 INFO L226 Difference]: Without dead ends: 107 [2018-11-10 04:51:27,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2018-11-10 04:51:27,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-11-10 04:51:27,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2018-11-10 04:51:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-10 04:51:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 120 transitions. [2018-11-10 04:51:27,024 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 120 transitions. Word has length 63 [2018-11-10 04:51:27,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:27,025 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 120 transitions. [2018-11-10 04:51:27,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 04:51:27,025 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 120 transitions. [2018-11-10 04:51:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-10 04:51:27,026 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:27,026 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:27,026 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:27,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:27,026 INFO L82 PathProgramCache]: Analyzing trace with hash 882947164, now seen corresponding path program 1 times [2018-11-10 04:51:27,026 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:27,027 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:27,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:27,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 04:51:27,218 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:27,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:51:27,369 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:51:27,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:27,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 04:51:27,404 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:27,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:51:27,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-10 04:51:27,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 04:51:27,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 04:51:27,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-10 04:51:27,586 INFO L87 Difference]: Start difference. First operand 93 states and 120 transitions. Second operand 8 states. [2018-11-10 04:51:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:28,215 INFO L93 Difference]: Finished difference Result 122 states and 152 transitions. [2018-11-10 04:51:28,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 04:51:28,215 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2018-11-10 04:51:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:28,221 INFO L225 Difference]: With dead ends: 122 [2018-11-10 04:51:28,221 INFO L226 Difference]: Without dead ends: 99 [2018-11-10 04:51:28,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-11-10 04:51:28,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-11-10 04:51:28,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2018-11-10 04:51:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-10 04:51:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2018-11-10 04:51:28,230 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 56 [2018-11-10 04:51:28,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:28,230 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2018-11-10 04:51:28,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 04:51:28,230 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2018-11-10 04:51:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-10 04:51:28,233 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:28,233 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:28,233 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:28,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:28,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1111197542, now seen corresponding path program 1 times [2018-11-10 04:51:28,234 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:28,234 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 22 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:28,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:28,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-10 04:51:28,448 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:28,459 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:28,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-11-10 04:51:28,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 04:51:28,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 04:51:28,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-11-10 04:51:28,460 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand 11 states. [2018-11-10 04:51:29,098 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-11-10 04:51:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:29,321 INFO L93 Difference]: Finished difference Result 117 states and 147 transitions. [2018-11-10 04:51:29,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 04:51:29,321 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-11-10 04:51:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:29,322 INFO L225 Difference]: With dead ends: 117 [2018-11-10 04:51:29,322 INFO L226 Difference]: Without dead ends: 115 [2018-11-10 04:51:29,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-11-10 04:51:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-11-10 04:51:29,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 93. [2018-11-10 04:51:29,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-10 04:51:29,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2018-11-10 04:51:29,331 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 56 [2018-11-10 04:51:29,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:29,332 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2018-11-10 04:51:29,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 04:51:29,332 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2018-11-10 04:51:29,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-10 04:51:29,332 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:29,332 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:29,333 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:29,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:29,333 INFO L82 PathProgramCache]: Analyzing trace with hash 156259763, now seen corresponding path program 1 times [2018-11-10 04:51:29,333 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:29,333 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 23 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:29,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:29,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 04:51:29,412 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:29,419 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:29,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:51:29,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:51:29,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:51:29,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:29,419 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 4 states. [2018-11-10 04:51:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:29,434 INFO L93 Difference]: Finished difference Result 123 states and 154 transitions. [2018-11-10 04:51:29,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:51:29,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-11-10 04:51:29,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:29,435 INFO L225 Difference]: With dead ends: 123 [2018-11-10 04:51:29,435 INFO L226 Difference]: Without dead ends: 96 [2018-11-10 04:51:29,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-11-10 04:51:29,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2018-11-10 04:51:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-10 04:51:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2018-11-10 04:51:29,444 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 56 [2018-11-10 04:51:29,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:29,444 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2018-11-10 04:51:29,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:51:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2018-11-10 04:51:29,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-10 04:51:29,445 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:29,445 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:29,445 INFO L424 AbstractCegarLoop]: === Iteration 18 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:29,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:29,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1976334024, now seen corresponding path program 1 times [2018-11-10 04:51:29,446 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:29,446 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:29,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:29,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 04:51:29,866 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:30,033 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2018-11-10 04:51:30,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:51:30,899 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:51:30,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:30,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-10 04:51:31,082 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:31,191 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2018-11-10 04:51:31,655 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2018-11-10 04:51:31,894 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2018-11-10 04:51:31,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:51:31,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 17 [2018-11-10 04:51:31,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 04:51:31,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 04:51:31,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-11-10 04:51:31,994 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 17 states. [2018-11-10 04:51:33,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:33,518 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2018-11-10 04:51:33,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 04:51:33,519 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-11-10 04:51:33,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:33,519 INFO L225 Difference]: With dead ends: 132 [2018-11-10 04:51:33,519 INFO L226 Difference]: Without dead ends: 116 [2018-11-10 04:51:33,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2018-11-10 04:51:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-11-10 04:51:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2018-11-10 04:51:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-11-10 04:51:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2018-11-10 04:51:33,536 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 63 [2018-11-10 04:51:33,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:33,536 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2018-11-10 04:51:33,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 04:51:33,537 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2018-11-10 04:51:33,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-10 04:51:33,537 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:33,537 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:33,538 INFO L424 AbstractCegarLoop]: === Iteration 19 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:33,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:33,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1167023126, now seen corresponding path program 1 times [2018-11-10 04:51:33,538 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:33,538 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 26 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:33,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:33,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-10 04:51:33,753 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-10 04:51:34,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:51:34,109 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:51:34,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:34,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-10 04:51:34,722 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:34,738 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:51:34,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 12] total 29 [2018-11-10 04:51:34,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-10 04:51:34,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-10 04:51:34,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2018-11-10 04:51:34,739 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand 29 states. [2018-11-10 04:51:36,092 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2018-11-10 04:51:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:36,807 INFO L93 Difference]: Finished difference Result 185 states and 240 transitions. [2018-11-10 04:51:36,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-10 04:51:36,808 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-11-10 04:51:36,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:36,809 INFO L225 Difference]: With dead ends: 185 [2018-11-10 04:51:36,809 INFO L226 Difference]: Without dead ends: 183 [2018-11-10 04:51:36,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=1302, Unknown=0, NotChecked=0, Total=1482 [2018-11-10 04:51:36,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-11-10 04:51:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 111. [2018-11-10 04:51:36,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-11-10 04:51:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 148 transitions. [2018-11-10 04:51:36,822 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 148 transitions. Word has length 57 [2018-11-10 04:51:36,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:36,822 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 148 transitions. [2018-11-10 04:51:36,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-10 04:51:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 148 transitions. [2018-11-10 04:51:36,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-10 04:51:36,823 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:36,823 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:36,823 INFO L424 AbstractCegarLoop]: === Iteration 20 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:36,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:36,823 INFO L82 PathProgramCache]: Analyzing trace with hash -689459069, now seen corresponding path program 1 times [2018-11-10 04:51:36,824 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:36,824 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 28 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:36,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:36,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 04:51:36,877 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:36,884 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:36,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:51:36,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:51:36,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:51:36,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:36,885 INFO L87 Difference]: Start difference. First operand 111 states and 148 transitions. Second operand 4 states. [2018-11-10 04:51:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:36,899 INFO L93 Difference]: Finished difference Result 142 states and 187 transitions. [2018-11-10 04:51:36,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:51:36,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-11-10 04:51:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:36,900 INFO L225 Difference]: With dead ends: 142 [2018-11-10 04:51:36,900 INFO L226 Difference]: Without dead ends: 113 [2018-11-10 04:51:36,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:36,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-11-10 04:51:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-11-10 04:51:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-10 04:51:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 144 transitions. [2018-11-10 04:51:36,910 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 144 transitions. Word has length 57 [2018-11-10 04:51:36,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:36,910 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 144 transitions. [2018-11-10 04:51:36,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:51:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 144 transitions. [2018-11-10 04:51:36,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-10 04:51:36,911 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:36,911 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:36,911 INFO L424 AbstractCegarLoop]: === Iteration 21 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:36,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:36,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1098283294, now seen corresponding path program 1 times [2018-11-10 04:51:36,912 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:36,912 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 29 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:36,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:36,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 04:51:37,407 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:37,415 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:37,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2018-11-10 04:51:37,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 04:51:37,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 04:51:37,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-11-10 04:51:37,415 INFO L87 Difference]: Start difference. First operand 109 states and 144 transitions. Second operand 15 states. [2018-11-10 04:51:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:38,761 INFO L93 Difference]: Finished difference Result 163 states and 212 transitions. [2018-11-10 04:51:38,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 04:51:38,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-10 04:51:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:38,762 INFO L225 Difference]: With dead ends: 163 [2018-11-10 04:51:38,762 INFO L226 Difference]: Without dead ends: 136 [2018-11-10 04:51:38,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2018-11-10 04:51:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-11-10 04:51:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2018-11-10 04:51:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-11-10 04:51:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2018-11-10 04:51:38,771 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 57 [2018-11-10 04:51:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:38,771 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2018-11-10 04:51:38,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 04:51:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2018-11-10 04:51:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-10 04:51:38,772 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:38,772 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 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, 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] [2018-11-10 04:51:38,772 INFO L424 AbstractCegarLoop]: === Iteration 22 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:38,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:38,772 INFO L82 PathProgramCache]: Analyzing trace with hash -404389237, now seen corresponding path program 1 times [2018-11-10 04:51:38,773 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:38,773 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 30 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:38,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:38,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 04:51:38,880 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-10 04:51:39,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:51:39,057 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:51:39,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:39,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 04:51:39,090 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-10 04:51:39,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 04:51:39,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9] total 13 [2018-11-10 04:51:39,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 04:51:39,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 04:51:39,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-11-10 04:51:39,292 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand 13 states. [2018-11-10 04:51:39,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:39,583 INFO L93 Difference]: Finished difference Result 190 states and 233 transitions. [2018-11-10 04:51:39,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 04:51:39,584 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2018-11-10 04:51:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:39,584 INFO L225 Difference]: With dead ends: 190 [2018-11-10 04:51:39,584 INFO L226 Difference]: Without dead ends: 101 [2018-11-10 04:51:39,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-11-10 04:51:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-11-10 04:51:39,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2018-11-10 04:51:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-10 04:51:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2018-11-10 04:51:39,590 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 69 [2018-11-10 04:51:39,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:39,590 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2018-11-10 04:51:39,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 04:51:39,590 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2018-11-10 04:51:39,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-10 04:51:39,590 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:39,591 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:39,591 INFO L424 AbstractCegarLoop]: === Iteration 23 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:39,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:39,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1873358980, now seen corresponding path program 1 times [2018-11-10 04:51:39,591 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:39,591 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 32 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:39,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:39,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-10 04:51:39,705 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:39,963 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-10 04:51:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-10 04:51:40,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:51:40,087 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:51:40,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:40,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-10 04:51:40,169 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-10 04:51:40,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 04:51:40,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 9] total 17 [2018-11-10 04:51:40,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 04:51:40,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 04:51:40,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-11-10 04:51:40,422 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 17 states. [2018-11-10 04:51:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:40,778 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2018-11-10 04:51:40,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 04:51:40,778 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2018-11-10 04:51:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:40,779 INFO L225 Difference]: With dead ends: 92 [2018-11-10 04:51:40,779 INFO L226 Difference]: Without dead ends: 60 [2018-11-10 04:51:40,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2018-11-10 04:51:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-10 04:51:40,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2018-11-10 04:51:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-10 04:51:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2018-11-10 04:51:40,784 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 61 [2018-11-10 04:51:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:40,784 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2018-11-10 04:51:40,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 04:51:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2018-11-10 04:51:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-10 04:51:40,785 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:40,785 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:40,785 INFO L424 AbstractCegarLoop]: === Iteration 24 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:40,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:40,786 INFO L82 PathProgramCache]: Analyzing trace with hash 555152686, now seen corresponding path program 1 times [2018-11-10 04:51:40,786 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:40,786 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 34 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:40,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:40,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 04:51:41,043 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:41,051 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:41,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 04:51:41,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 04:51:41,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 04:51:41,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-10 04:51:41,051 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 12 states. [2018-11-10 04:51:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:41,564 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2018-11-10 04:51:41,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 04:51:41,564 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2018-11-10 04:51:41,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:41,565 INFO L225 Difference]: With dead ends: 79 [2018-11-10 04:51:41,565 INFO L226 Difference]: Without dead ends: 58 [2018-11-10 04:51:41,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-10 04:51:41,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-11-10 04:51:41,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-11-10 04:51:41,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-10 04:51:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-11-10 04:51:41,568 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 70 [2018-11-10 04:51:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:41,569 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-11-10 04:51:41,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 04:51:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-11-10 04:51:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-10 04:51:41,569 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:41,569 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 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, 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] [2018-11-10 04:51:41,569 INFO L424 AbstractCegarLoop]: === Iteration 25 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:41,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:41,570 INFO L82 PathProgramCache]: Analyzing trace with hash 185535526, now seen corresponding path program 1 times [2018-11-10 04:51:41,570 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:41,570 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 35 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:41,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:41,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 04:51:41,860 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:41,873 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:41,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 04:51:41,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 04:51:41,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 04:51:41,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-10 04:51:41,874 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 12 states. [2018-11-10 04:51:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:42,623 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2018-11-10 04:51:42,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 04:51:42,624 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2018-11-10 04:51:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:42,624 INFO L225 Difference]: With dead ends: 81 [2018-11-10 04:51:42,624 INFO L226 Difference]: Without dead ends: 60 [2018-11-10 04:51:42,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-10 04:51:42,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-10 04:51:42,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2018-11-10 04:51:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-10 04:51:42,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-11-10 04:51:42,627 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 71 [2018-11-10 04:51:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:42,627 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-11-10 04:51:42,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 04:51:42,628 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-11-10 04:51:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-10 04:51:42,628 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:42,628 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 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, 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] [2018-11-10 04:51:42,628 INFO L424 AbstractCegarLoop]: === Iteration 26 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:42,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:42,628 INFO L82 PathProgramCache]: Analyzing trace with hash 666329646, now seen corresponding path program 1 times [2018-11-10 04:51:42,629 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:42,629 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 36 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:42,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:42,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 04:51:42,791 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:43,425 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 04:51:43,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:51:43,432 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:51:43,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:43,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 04:51:43,498 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 04:51:43,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 04:51:43,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 17 [2018-11-10 04:51:43,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 04:51:43,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 04:51:43,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-11-10 04:51:43,961 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 17 states. [2018-11-10 04:51:44,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:44,482 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2018-11-10 04:51:44,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 04:51:44,482 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-11-10 04:51:44,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:44,483 INFO L225 Difference]: With dead ends: 83 [2018-11-10 04:51:44,483 INFO L226 Difference]: Without dead ends: 68 [2018-11-10 04:51:44,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 262 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2018-11-10 04:51:44,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-10 04:51:44,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2018-11-10 04:51:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-11-10 04:51:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-11-10 04:51:44,487 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 71 [2018-11-10 04:51:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:44,487 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-11-10 04:51:44,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 04:51:44,487 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-11-10 04:51:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-10 04:51:44,487 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:44,487 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 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, 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] [2018-11-10 04:51:44,487 INFO L424 AbstractCegarLoop]: === Iteration 27 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:44,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:44,487 INFO L82 PathProgramCache]: Analyzing trace with hash 89744946, now seen corresponding path program 1 times [2018-11-10 04:51:44,488 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:44,488 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 38 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:44,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:44,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 04:51:44,761 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:44,770 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:44,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 04:51:44,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 04:51:44,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 04:51:44,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-10 04:51:44,771 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 12 states. [2018-11-10 04:51:45,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:45,530 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2018-11-10 04:51:45,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 04:51:45,531 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2018-11-10 04:51:45,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:45,531 INFO L225 Difference]: With dead ends: 85 [2018-11-10 04:51:45,531 INFO L226 Difference]: Without dead ends: 64 [2018-11-10 04:51:45,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-10 04:51:45,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-10 04:51:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2018-11-10 04:51:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-11-10 04:51:45,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-11-10 04:51:45,535 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 72 [2018-11-10 04:51:45,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:45,535 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-11-10 04:51:45,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 04:51:45,536 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-11-10 04:51:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-10 04:51:45,536 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:45,536 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 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, 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] [2018-11-10 04:51:45,536 INFO L424 AbstractCegarLoop]: === Iteration 28 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:45,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:45,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1015006792, now seen corresponding path program 1 times [2018-11-10 04:51:45,537 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:45,537 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 39 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:45,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:45,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-10 04:51:45,701 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-10 04:51:46,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:51:46,041 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:51:46,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:46,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-11-10 04:51:46,170 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:51:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-10 04:51:46,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 04:51:46,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12, 13] total 22 [2018-11-10 04:51:46,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-10 04:51:46,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-10 04:51:46,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2018-11-10 04:51:46,400 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 22 states. [2018-11-10 04:51:46,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:46,955 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2018-11-10 04:51:46,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 04:51:46,956 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2018-11-10 04:51:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:46,956 INFO L225 Difference]: With dead ends: 78 [2018-11-10 04:51:46,956 INFO L226 Difference]: Without dead ends: 63 [2018-11-10 04:51:46,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2018-11-10 04:51:46,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-10 04:51:46,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2018-11-10 04:51:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-10 04:51:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2018-11-10 04:51:46,961 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 72 [2018-11-10 04:51:46,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:46,961 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2018-11-10 04:51:46,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-10 04:51:46,961 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2018-11-10 04:51:46,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 04:51:46,961 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:46,962 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:46,962 INFO L424 AbstractCegarLoop]: === Iteration 29 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:46,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:46,962 INFO L82 PathProgramCache]: Analyzing trace with hash -107356246, now seen corresponding path program 1 times [2018-11-10 04:51:46,962 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:46,962 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 41 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:46,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:51:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:47,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 04:51:47,207 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:47,214 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:47,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 04:51:47,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 04:51:47,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 04:51:47,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-10 04:51:47,215 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 12 states. [2018-11-10 04:51:47,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:47,789 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2018-11-10 04:51:47,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 04:51:47,789 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2018-11-10 04:51:47,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:47,789 INFO L225 Difference]: With dead ends: 78 [2018-11-10 04:51:47,790 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 04:51:47,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-10 04:51:47,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 04:51:47,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2018-11-10 04:51:47,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-10 04:51:47,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2018-11-10 04:51:47,793 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 73 [2018-11-10 04:51:47,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:47,793 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2018-11-10 04:51:47,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 04:51:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2018-11-10 04:51:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 04:51:47,797 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:51:47,798 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:51:47,798 INFO L424 AbstractCegarLoop]: === Iteration 30 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:51:47,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:51:47,798 INFO L82 PathProgramCache]: Analyzing trace with hash 585745451, now seen corresponding path program 1 times [2018-11-10 04:51:47,798 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:51:47,798 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/mathsat Starting monitored process 42 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-11-10 04:51:47,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 42 with mathsat -unsat_core_generation=3 [2018-11-10 04:51:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:51:47,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:51:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-10 04:51:47,863 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:51:47,874 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:51:47,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:51:47,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:51:47,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:51:47,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:47,874 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 4 states. [2018-11-10 04:51:47,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:51:47,880 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-11-10 04:51:47,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:51:47,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2018-11-10 04:51:47,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:51:47,881 INFO L225 Difference]: With dead ends: 58 [2018-11-10 04:51:47,881 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 04:51:47,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:51:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 04:51:47,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 04:51:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 04:51:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 04:51:47,882 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2018-11-10 04:51:47,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:51:47,882 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 04:51:47,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:51:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 04:51:47,883 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 04:51:47,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 04:51:48,024 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 04:51:48,254 INFO L425 ceAbstractionStarter]: For program point isnan_floatFINAL(line 57) no Hoare annotation was computed. [2018-11-10 04:51:48,254 INFO L428 ceAbstractionStarter]: At program point isnan_floatENTRY(line 57) the Hoare annotation is: true [2018-11-10 04:51:48,254 INFO L425 ceAbstractionStarter]: For program point isnan_floatEXIT(line 57) no Hoare annotation was computed. [2018-11-10 04:51:48,254 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-11-10 04:51:48,254 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-11-10 04:51:48,254 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 04:51:48,254 INFO L428 ceAbstractionStarter]: At program point fmin_floatENTRY(lines 35 42) the Hoare annotation is: true [2018-11-10 04:51:48,254 INFO L425 ceAbstractionStarter]: For program point fmin_floatEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-10 04:51:48,254 INFO L425 ceAbstractionStarter]: For program point fmin_floatFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-10 04:51:48,255 INFO L425 ceAbstractionStarter]: For program point L41(line 41) no Hoare annotation was computed. [2018-11-10 04:51:48,255 INFO L425 ceAbstractionStarter]: For program point L41-2(line 41) no Hoare annotation was computed. [2018-11-10 04:51:48,255 INFO L421 ceAbstractionStarter]: At program point L38(line 38) the Hoare annotation is: (and (= fmin_float_~x |fmin_float_#in~x|) (= fmin_float_~y |fmin_float_#in~y|)) [2018-11-10 04:51:48,255 INFO L425 ceAbstractionStarter]: For program point L38-1(lines 38 39) no Hoare annotation was computed. [2018-11-10 04:51:48,255 INFO L421 ceAbstractionStarter]: At program point L36(line 36) the Hoare annotation is: (and (= fmin_float_~x |fmin_float_#in~x|) (= fmin_float_~y |fmin_float_#in~y|)) [2018-11-10 04:51:48,255 INFO L425 ceAbstractionStarter]: For program point L36-1(lines 36 37) no Hoare annotation was computed. [2018-11-10 04:51:48,255 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 04:51:48,255 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 04:51:48,255 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 04:51:48,255 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 04:51:48,255 INFO L421 ceAbstractionStarter]: At program point L68-3(line 68) the Hoare annotation is: (and (= (_ bv1 32) |main_#t~ret9|) |main_#t~short11| (not (fp.eq main_~x~0 main_~x~0))) [2018-11-10 04:51:48,255 INFO L425 ceAbstractionStarter]: For program point L68-4(line 68) no Hoare annotation was computed. [2018-11-10 04:51:48,255 INFO L425 ceAbstractionStarter]: For program point L68-6(line 68) no Hoare annotation was computed. [2018-11-10 04:51:48,255 INFO L425 ceAbstractionStarter]: For program point L68-7(lines 68 69) no Hoare annotation was computed. [2018-11-10 04:51:48,255 INFO L425 ceAbstractionStarter]: For program point L68-9(lines 68 84) no Hoare annotation was computed. [2018-11-10 04:51:48,256 INFO L425 ceAbstractionStarter]: For program point L68-11(lines 68 84) no Hoare annotation was computed. [2018-11-10 04:51:48,256 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 59 87) no Hoare annotation was computed. [2018-11-10 04:51:48,256 INFO L425 ceAbstractionStarter]: For program point L81(line 81) no Hoare annotation was computed. [2018-11-10 04:51:48,256 INFO L421 ceAbstractionStarter]: At program point L69(line 69) the Hoare annotation is: (let ((.cse0 (not |main_#t~short11|)) (.cse2 (fp.eq main_~x~0 main_~x~0)) (.cse1 (not |main_#t~short15|))) (or (and .cse0 .cse1 (= (_ bv1 32) |main_#t~ret9|) (= (bvadd |main_#t~ret10| (_ bv4294967295 32)) (_ bv0 32)) (not (fp.eq main_~y~0 main_~y~0)) (not .cse2)) (and .cse0 .cse2 .cse1 (= (_ bv0 32) |main_#t~ret9|)))) [2018-11-10 04:51:48,256 INFO L425 ceAbstractionStarter]: For program point L69-1(line 69) no Hoare annotation was computed. [2018-11-10 04:51:48,256 INFO L425 ceAbstractionStarter]: For program point L69-2(line 69) no Hoare annotation was computed. [2018-11-10 04:51:48,256 INFO L421 ceAbstractionStarter]: At program point L69-3(line 69) the Hoare annotation is: (and |main_#t~short14| (not |main_#t~short11|) (fp.eq main_~x~0 main_~x~0) (not |main_#t~short15|) (= |main_#t~ret12| (_ bv0 32)) (= (_ bv0 32) |main_#t~ret9|)) [2018-11-10 04:51:48,256 INFO L425 ceAbstractionStarter]: For program point L69-4(line 69) no Hoare annotation was computed. [2018-11-10 04:51:48,256 INFO L425 ceAbstractionStarter]: For program point L69-6(line 69) no Hoare annotation was computed. [2018-11-10 04:51:48,256 INFO L425 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 81) no Hoare annotation was computed. [2018-11-10 04:51:48,256 INFO L421 ceAbstractionStarter]: At program point L74(line 74) the Hoare annotation is: (or (and (= main_~y~0 main_~res~0) (not (fp.eq main_~x~0 main_~x~0))) (and (= main_~x~0 main_~res~0) (not (fp.eq main_~y~0 main_~y~0)))) [2018-11-10 04:51:48,256 INFO L425 ceAbstractionStarter]: For program point L74-1(line 74) no Hoare annotation was computed. [2018-11-10 04:51:48,256 INFO L425 ceAbstractionStarter]: For program point L74-2(line 74) no Hoare annotation was computed. [2018-11-10 04:51:48,257 INFO L421 ceAbstractionStarter]: At program point L74-3(line 74) the Hoare annotation is: (and (= main_~y~0 main_~res~0) |main_#t~short19| (= (bvadd |main_#t~ret17| (_ bv4294967295 32)) (_ bv0 32)) (not (fp.eq main_~x~0 main_~x~0))) [2018-11-10 04:51:48,257 INFO L425 ceAbstractionStarter]: For program point L74-4(line 74) no Hoare annotation was computed. [2018-11-10 04:51:48,257 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 75) no Hoare annotation was computed. [2018-11-10 04:51:48,257 INFO L425 ceAbstractionStarter]: For program point L74-6(lines 74 77) no Hoare annotation was computed. [2018-11-10 04:51:48,257 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 59 87) no Hoare annotation was computed. [2018-11-10 04:51:48,257 INFO L425 ceAbstractionStarter]: For program point L75(line 75) no Hoare annotation was computed. [2018-11-10 04:51:48,257 INFO L421 ceAbstractionStarter]: At program point L71(line 71) the Hoare annotation is: (let ((.cse1 (fp.eq main_~y~0 main_~y~0)) (.cse0 (fp.eq main_~x~0 main_~x~0))) (or (and .cse0 (not .cse1)) (and .cse1 (not .cse0)))) [2018-11-10 04:51:48,257 INFO L425 ceAbstractionStarter]: For program point L71-1(line 71) no Hoare annotation was computed. [2018-11-10 04:51:48,257 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 59 87) the Hoare annotation is: true [2018-11-10 04:51:48,257 INFO L421 ceAbstractionStarter]: At program point L80(line 80) the Hoare annotation is: (or (and (= main_~x~0 main_~res~0) (not (fp.eq main_~y~0 main_~y~0))) (not (fp.eq main_~x~0 main_~x~0))) [2018-11-10 04:51:48,257 INFO L425 ceAbstractionStarter]: For program point L80-1(line 80) no Hoare annotation was computed. [2018-11-10 04:51:48,257 INFO L425 ceAbstractionStarter]: For program point L80-2(line 80) no Hoare annotation was computed. [2018-11-10 04:51:48,257 INFO L421 ceAbstractionStarter]: At program point L80-3(line 80) the Hoare annotation is: (and (= main_~x~0 main_~res~0) (fp.eq main_~x~0 main_~x~0) |main_#t~short22| (not (fp.eq main_~y~0 main_~y~0))) [2018-11-10 04:51:48,258 INFO L425 ceAbstractionStarter]: For program point L80-4(line 80) no Hoare annotation was computed. [2018-11-10 04:51:48,258 INFO L425 ceAbstractionStarter]: For program point L80-6(lines 80 83) no Hoare annotation was computed. [2018-11-10 04:51:48,258 INFO L428 ceAbstractionStarter]: At program point L68(line 68) the Hoare annotation is: true [2018-11-10 04:51:48,258 INFO L425 ceAbstractionStarter]: For program point L68-1(line 68) no Hoare annotation was computed. [2018-11-10 04:51:48,258 INFO L425 ceAbstractionStarter]: For program point L68-2(line 68) no Hoare annotation was computed. [2018-11-10 04:51:48,258 INFO L425 ceAbstractionStarter]: For program point L29(lines 29 32) no Hoare annotation was computed. [2018-11-10 04:51:48,258 INFO L425 ceAbstractionStarter]: For program point __fpclassify_floatFINAL(lines 12 33) no Hoare annotation was computed. [2018-11-10 04:51:48,258 INFO L425 ceAbstractionStarter]: For program point L23(lines 23 32) no Hoare annotation was computed. [2018-11-10 04:51:48,258 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 19) no Hoare annotation was computed. [2018-11-10 04:51:48,258 INFO L421 ceAbstractionStarter]: At program point L15-3(lines 15 19) the Hoare annotation is: (= __fpclassify_float_~x |__fpclassify_float_#in~x|) [2018-11-10 04:51:48,258 INFO L425 ceAbstractionStarter]: For program point L15-4(lines 12 33) no Hoare annotation was computed. [2018-11-10 04:51:48,258 INFO L425 ceAbstractionStarter]: For program point L26(lines 26 32) no Hoare annotation was computed. [2018-11-10 04:51:48,258 INFO L428 ceAbstractionStarter]: At program point __fpclassify_floatENTRY(lines 12 33) the Hoare annotation is: true [2018-11-10 04:51:48,258 INFO L425 ceAbstractionStarter]: For program point __fpclassify_floatEXIT(lines 12 33) no Hoare annotation was computed. [2018-11-10 04:51:48,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 04:51:48 BoogieIcfgContainer [2018-11-10 04:51:48,271 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 04:51:48,272 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 04:51:48,272 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 04:51:48,272 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 04:51:48,272 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:51:19" (3/4) ... [2018-11-10 04:51:48,275 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 04:51:48,281 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2018-11-10 04:51:48,281 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 04:51:48,281 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fmin_float [2018-11-10 04:51:48,281 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 04:51:48,281 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2018-11-10 04:51:48,286 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 28 nodes and edges [2018-11-10 04:51:48,286 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2018-11-10 04:51:48,286 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-10 04:51:48,304 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: x == \old(x) [2018-11-10 04:51:48,322 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_41a93492-4e0b-4842-8b8a-b39c5f1a5960/bin-2019/utaipan/witness.graphml [2018-11-10 04:51:48,323 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 04:51:48,323 INFO L168 Benchmark]: Toolchain (without parser) took 29757.23 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 395.3 MB). Free memory was 950.8 MB in the beginning and 1.3 GB in the end (delta: -318.4 MB). Peak memory consumption was 76.9 MB. Max. memory is 11.5 GB. [2018-11-10 04:51:48,324 INFO L168 Benchmark]: CDTParser took 0.17 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. [2018-11-10 04:51:48,324 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.54 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 934.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-10 04:51:48,324 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.81 ms. Allocated memory is still 1.0 GB. Free memory is still 934.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:51:48,324 INFO L168 Benchmark]: Boogie Preprocessor took 23.50 ms. Allocated memory is still 1.0 GB. Free memory is still 934.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:51:48,325 INFO L168 Benchmark]: RCFGBuilder took 310.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 934.7 MB in the beginning and 1.1 GB in the end (delta: -176.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. [2018-11-10 04:51:48,325 INFO L168 Benchmark]: TraceAbstraction took 29163.91 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 255.9 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -158.2 MB). Peak memory consumption was 97.6 MB. Max. memory is 11.5 GB. [2018-11-10 04:51:48,325 INFO L168 Benchmark]: Witness Printer took 50.93 ms. Allocated memory is still 1.4 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:51:48,326 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 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 176.54 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 934.7 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 27.81 ms. Allocated memory is still 1.0 GB. Free memory is still 934.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.50 ms. Allocated memory is still 1.0 GB. Free memory is still 934.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 310.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 934.7 MB in the beginning and 1.1 GB in the end (delta: -176.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 29163.91 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 255.9 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -158.2 MB). Peak memory consumption was 97.6 MB. Max. memory is 11.5 GB. * Witness Printer took 50.93 ms. Allocated memory is still 1.4 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 81]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 75]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: x == \old(x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 2 error locations. SAFE Result, 29.1s OverallTime, 30 OverallIterations, 6 TraceHistogramMax, 14.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 2048 SDtfs, 1296 SDslu, 12569 SDs, 0 SdLazy, 6548 SolverSat, 409 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3503 GetRequests, 3104 SyntacticMatches, 13 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 9.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 30 MinimizatonAttempts, 339 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 166 PreInvPairs, 190 NumberOfFragments, 156 HoareAnnotationTreeSize, 166 FomulaSimplifications, 21394 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 19 FomulaSimplificationsInter, 78 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 11.1s InterpolantComputationTime, 2391 NumberOfCodeBlocks, 2391 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 3264 ConstructedInterpolants, 49 QuantifiedInterpolants, 645235 SizeOfPredicates, 209 NumberOfNonLiveVariables, 6032 ConjunctsInSsa, 427 ConjunctsInUnsatCore, 56 InterpolantComputations, 23 PerfectInterpolantSequences, 1644/1858 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...