./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1251_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_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 df3954142d6b55c98b13b60b9fbaf053d4d402ff .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 df3954142d6b55c98b13b60b9fbaf053d4d402ff ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-27 00:28:00,309 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 00:28:00,310 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 00:28:00,330 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 00:28:00,331 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 00:28:00,333 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 00:28:00,335 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 00:28:00,337 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 00:28:00,339 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 00:28:00,341 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 00:28:00,344 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 00:28:00,344 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 00:28:00,345 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 00:28:00,348 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 00:28:00,349 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 00:28:00,358 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 00:28:00,359 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 00:28:00,360 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 00:28:00,361 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 00:28:00,362 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 00:28:00,363 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 00:28:00,364 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 00:28:00,367 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 00:28:00,370 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 00:28:00,370 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 00:28:00,371 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 00:28:00,372 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 00:28:00,372 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 00:28:00,373 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 00:28:00,374 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 00:28:00,374 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 00:28:00,374 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 00:28:00,375 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 00:28:00,375 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 00:28:00,375 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 00:28:00,376 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 00:28:00,376 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-27 00:28:00,395 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 00:28:00,395 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 00:28:00,396 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 00:28:00,396 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 00:28:00,396 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 00:28:00,396 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 00:28:00,396 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 00:28:00,397 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 00:28:00,397 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 00:28:00,397 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 00:28:00,397 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 00:28:00,398 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 00:28:00,398 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-27 00:28:00,398 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 00:28:00,399 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-27 00:28:00,399 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 00:28:00,399 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 00:28:00,399 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 00:28:00,399 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 00:28:00,399 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-27 00:28:00,399 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 00:28:00,400 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 00:28:00,400 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 00:28:00,400 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 00:28:00,400 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 00:28:00,400 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 00:28:00,402 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 00:28:00,402 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 00:28:00,403 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 00:28:00,403 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 00:28:00,403 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 00:28:00,403 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 00:28:00,403 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 00:28:00,403 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 00:28:00,403 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_cf7911c8-785f-42ca-8ea5-41696155bd13/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 -> df3954142d6b55c98b13b60b9fbaf053d4d402ff [2018-10-27 00:28:00,432 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 00:28:00,441 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 00:28:00,444 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 00:28:00,445 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 00:28:00,446 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 00:28:00,446 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-10-27 00:28:00,492 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/data/050fa4431/b681c3148ec74c99b935b5bff176f8d3/FLAG5c5b40a8d [2018-10-27 00:28:00,871 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 00:28:00,871 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-10-27 00:28:00,880 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/data/050fa4431/b681c3148ec74c99b935b5bff176f8d3/FLAG5c5b40a8d [2018-10-27 00:28:00,912 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/data/050fa4431/b681c3148ec74c99b935b5bff176f8d3 [2018-10-27 00:28:00,915 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 00:28:00,916 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 00:28:00,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 00:28:00,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 00:28:00,920 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 00:28:00,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:28:00" (1/1) ... [2018-10-27 00:28:00,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c682c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:00, skipping insertion in model container [2018-10-27 00:28:00,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:28:00" (1/1) ... [2018-10-27 00:28:00,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 00:28:00,949 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 00:28:01,075 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 00:28:01,078 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 00:28:01,099 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 00:28:01,117 INFO L193 MainTranslator]: Completed translation [2018-10-27 00:28:01,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:01 WrapperNode [2018-10-27 00:28:01,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 00:28:01,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 00:28:01,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 00:28:01,119 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 00:28:01,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:01" (1/1) ... [2018-10-27 00:28:01,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:01" (1/1) ... [2018-10-27 00:28:01,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 00:28:01,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 00:28:01,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 00:28:01,153 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 00:28:01,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:01" (1/1) ... [2018-10-27 00:28:01,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:01" (1/1) ... [2018-10-27 00:28:01,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:01" (1/1) ... [2018-10-27 00:28:01,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:01" (1/1) ... [2018-10-27 00:28:01,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:01" (1/1) ... [2018-10-27 00:28:01,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:01" (1/1) ... [2018-10-27 00:28:01,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:01" (1/1) ... [2018-10-27 00:28:01,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 00:28:01,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 00:28:01,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 00:28:01,179 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 00:28:01,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:01,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 00:28:01,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 00:28:01,304 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2018-10-27 00:28:01,304 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2018-10-27 00:28:01,304 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-10-27 00:28:01,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-10-27 00:28:01,304 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-10-27 00:28:01,304 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-10-27 00:28:01,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 00:28:01,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 00:28:01,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 00:28:01,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 00:28:01,826 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 00:28:01,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:28:01 BoogieIcfgContainer [2018-10-27 00:28:01,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 00:28:01,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 00:28:01,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 00:28:01,831 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 00:28:01,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:28:00" (1/3) ... [2018-10-27 00:28:01,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77bb03a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:28:01, skipping insertion in model container [2018-10-27 00:28:01,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:01" (2/3) ... [2018-10-27 00:28:01,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77bb03a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:28:01, skipping insertion in model container [2018-10-27 00:28:01,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:28:01" (3/3) ... [2018-10-27 00:28:01,834 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251_true-unreach-call.c [2018-10-27 00:28:01,844 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 00:28:01,852 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-10-27 00:28:01,867 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-10-27 00:28:01,897 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 00:28:01,897 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 00:28:01,897 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 00:28:01,897 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 00:28:01,897 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 00:28:01,898 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 00:28:01,898 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 00:28:01,898 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 00:28:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2018-10-27 00:28:01,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-27 00:28:01,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:01,923 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] [2018-10-27 00:28:01,925 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:01,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:01,931 INFO L82 PathProgramCache]: Analyzing trace with hash -732075711, now seen corresponding path program 1 times [2018-10-27 00:28:01,933 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:28:01,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:28:01,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:01,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:28:01,978 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:28:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 00:28:02,064 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:02,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 00:28:02,064 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 00:28:02,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-27 00:28:02,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-27 00:28:02,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-27 00:28:02,090 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2018-10-27 00:28:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:02,121 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions. [2018-10-27 00:28:02,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-27 00:28:02,122 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 36 [2018-10-27 00:28:02,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:02,133 INFO L225 Difference]: With dead ends: 109 [2018-10-27 00:28:02,133 INFO L226 Difference]: Without dead ends: 61 [2018-10-27 00:28:02,136 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 [2018-10-27 00:28:02,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-27 00:28:02,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-27 00:28:02,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-27 00:28:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-10-27 00:28:02,190 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-10-27 00:28:02,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:02,193 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-10-27 00:28:02,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-27 00:28:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-10-27 00:28:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-27 00:28:02,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:02,195 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] [2018-10-27 00:28:02,196 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:02,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:02,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1620066532, now seen corresponding path program 1 times [2018-10-27 00:28:02,196 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:28:02,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:28:02,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:02,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:28:02,201 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:28:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 00:28:02,288 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:02,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 00:28:02,288 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 00:28:02,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 00:28:02,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 00:28:02,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 00:28:02,290 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-10-27 00:28:02,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:02,416 INFO L93 Difference]: Finished difference Result 112 states and 147 transitions. [2018-10-27 00:28:02,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 00:28:02,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-10-27 00:28:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:02,418 INFO L225 Difference]: With dead ends: 112 [2018-10-27 00:28:02,418 INFO L226 Difference]: Without dead ends: 70 [2018-10-27 00:28:02,419 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 [2018-10-27 00:28:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-27 00:28:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2018-10-27 00:28:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-27 00:28:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2018-10-27 00:28:02,430 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 37 [2018-10-27 00:28:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:02,430 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2018-10-27 00:28:02,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 00:28:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2018-10-27 00:28:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-27 00:28:02,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:02,432 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] [2018-10-27 00:28:02,434 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:02,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:02,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1433468384, now seen corresponding path program 1 times [2018-10-27 00:28:02,434 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:28:02,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:28:02,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:02,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:28:02,436 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:28:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 00:28:02,556 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:02,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 00:28:02,556 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 00:28:02,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 00:28:02,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 00:28:02,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 00:28:02,557 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2018-10-27 00:28:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:02,668 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2018-10-27 00:28:02,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 00:28:02,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-10-27 00:28:02,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:02,671 INFO L225 Difference]: With dead ends: 89 [2018-10-27 00:28:02,671 INFO L226 Difference]: Without dead ends: 67 [2018-10-27 00:28:02,672 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 [2018-10-27 00:28:02,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-27 00:28:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-27 00:28:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-27 00:28:02,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-10-27 00:28:02,680 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 42 [2018-10-27 00:28:02,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:02,680 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-10-27 00:28:02,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 00:28:02,681 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-10-27 00:28:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-27 00:28:02,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:02,682 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] [2018-10-27 00:28:02,682 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:02,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:02,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1362097717, now seen corresponding path program 1 times [2018-10-27 00:28:02,683 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:28:02,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:28:02,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:02,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:28:02,684 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:28:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 00:28:02,765 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:02,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 00:28:02,765 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 00:28:02,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 00:28:02,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 00:28:02,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 00:28:02,766 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 3 states. [2018-10-27 00:28:02,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:02,797 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2018-10-27 00:28:02,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 00:28:02,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2018-10-27 00:28:02,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:02,800 INFO L225 Difference]: With dead ends: 70 [2018-10-27 00:28:02,800 INFO L226 Difference]: Without dead ends: 68 [2018-10-27 00:28:02,801 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 [2018-10-27 00:28:02,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-27 00:28:02,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-27 00:28:02,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-27 00:28:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2018-10-27 00:28:02,810 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 45 [2018-10-27 00:28:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:02,810 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2018-10-27 00:28:02,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 00:28:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2018-10-27 00:28:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-27 00:28:02,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:02,813 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] [2018-10-27 00:28:02,813 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:02,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:02,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1930782112, now seen corresponding path program 1 times [2018-10-27 00:28:02,813 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:28:02,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:28:02,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:02,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:28:02,814 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:28:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 00:28:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 00:28:02,911 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-27 00:28:02,926 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-10-27 00:28:02,927 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 00:28:02,927 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-10-27 00:28:02,928 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 00:28:02,928 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-10-27 00:28:02,928 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 00:28:02,928 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-10-27 00:28:02,929 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 00:28:02,929 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-10-27 00:28:02,929 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 00:28:02,929 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-10-27 00:28:02,930 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 00:28:02,930 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-10-27 00:28:02,930 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 00:28:02,930 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-10-27 00:28:02,931 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 00:28:02,931 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-10-27 00:28:02,931 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 00:28:02,931 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-10-27 00:28:02,932 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 00:28:02,932 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-10-27 00:28:02,932 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 00:28:02,936 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-10-27 00:28:02,936 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 00:28:02,937 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-10-27 00:28:02,937 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 00:28:02,937 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-10-27 00:28:02,937 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-10-27 00:28:02,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 12:28:02 BoogieIcfgContainer [2018-10-27 00:28:02,958 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 00:28:02,958 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 00:28:02,958 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 00:28:02,959 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 00:28:02,959 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:28:01" (3/4) ... [2018-10-27 00:28:02,964 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-10-27 00:28:02,964 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 00:28:02,965 INFO L168 Benchmark]: Toolchain (without parser) took 2049.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 962.5 MB in the beginning and 1.0 GB in the end (delta: -74.8 MB). Peak memory consumption was 67.8 MB. Max. memory is 11.5 GB. [2018-10-27 00:28:02,966 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 00:28:02,966 INFO L168 Benchmark]: CACSL2BoogieTranslator took 201.05 ms. Allocated memory is still 1.0 GB. Free memory was 962.5 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-27 00:28:02,967 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.12 ms. Allocated memory is still 1.0 GB. Free memory was 951.7 MB in the beginning and 946.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-10-27 00:28:02,967 INFO L168 Benchmark]: Boogie Preprocessor took 25.77 ms. Allocated memory is still 1.0 GB. Free memory is still 946.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 00:28:02,968 INFO L168 Benchmark]: RCFGBuilder took 647.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 946.4 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. [2018-10-27 00:28:02,968 INFO L168 Benchmark]: TraceAbstraction took 1131.04 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: 77.9 MB). Peak memory consumption was 77.9 MB. Max. memory is 11.5 GB. [2018-10-27 00:28:02,970 INFO L168 Benchmark]: Witness Printer took 5.59 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. [2018-10-27 00:28:02,973 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 201.05 ms. Allocated memory is still 1.0 GB. Free memory was 962.5 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.12 ms. Allocated memory is still 1.0 GB. Free memory was 951.7 MB in the beginning and 946.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.77 ms. Allocated memory is still 1.0 GB. Free memory is still 946.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 647.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 946.4 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1131.04 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: 77.9 MB). Peak memory consumption was 77.9 MB. Max. memory is 11.5 GB. * Witness Printer took 5.59 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.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.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.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.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.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.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.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.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.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.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.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.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.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.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 74]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 73. Possible FailurePath: [L64] float x = __VERIFIER_nondet_float(); [L65] float y = __VERIFIER_nondet_float(); [L67] CALL, EXPR isnan_float(x) VAL [\old(x)=4286578693] [L55] RET return x != x; VAL [\old(x)=4286578693, \result=1, x=4286578693] [L67] EXPR isnan_float(x) VAL [isnan_float(x)=1, x=4286578693, y=4286578692] [L67] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, x=4286578693, y=4286578692] [L67] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578692] [L55] RET return x != x; VAL [\old(x)=4286578692, \result=0, x=4286578692] [L67] EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578693, y=4286578692] [L67] 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] [L67-L68] (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] [L67-L68] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L70] CALL, EXPR fmax_float(x, y) VAL [\old(x)=4286578693, \old(y)=4286578692] [L44] CALL, EXPR __fpclassify_float(x) [L21] __uint32_t w; [L24] CALL ieee_float_shape_type gf_u; [L24] RET ieee_float_shape_type gf_u; [L25] CALL gf_u.value = (x) [L25] RET gf_u.value = (x) [L26] CALL, EXPR gf_u.word [L26] RET, EXPR gf_u.word [L26] (w) = gf_u.word [L26] RET (w) = gf_u.word [L27] COND FALSE !(0) [L29] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L31-L32] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L34-L35] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L37] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L40] RET return 0; [L44] EXPR __fpclassify_float(x) VAL [\old(x)=4286578693, \old(y)=4286578692, __fpclassify_float(x)=0, x=4286578693, y=4286578692] [L44] COND TRUE __fpclassify_float(x) == 0 [L45] RET return y; VAL [\old(x)=4286578693, \old(y)=4286578692, \result=4286578692, x=4286578693, y=4286578692] [L70] EXPR fmax_float(x, y) VAL [fmax_float(x, y)=4286578692, x=4286578693, y=4286578692] [L70] float res = fmax_float(x, y); [L73] CALL, EXPR isnan_float(x) VAL [\old(x)=4286578693] [L55] RET return x != x; VAL [\old(x)=4286578693, \result=1, x=4286578693] [L73] EXPR isnan_float(x) VAL [isnan_float(x)=1, res=4286578692, x=4286578693, y=4286578692] [L73] 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] [L73] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578692] [L55] RET return x != x; VAL [\old(x)=4286578692, \result=0, x=4286578692] [L73] 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] [L73] 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] [L73] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L74] __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, 1.0s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 324 SDtfs, 16 SDslu, 367 SDs, 0 SdLazy, 28 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s 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, 0.1s SatisfiabilityAnalysisTime, 0.2s 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 [2018-10-27 00:28:04,921 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 00:28:04,923 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 00:28:04,932 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 00:28:04,933 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 00:28:04,933 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 00:28:04,934 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 00:28:04,935 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 00:28:04,937 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 00:28:04,938 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 00:28:04,939 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 00:28:04,939 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 00:28:04,939 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 00:28:04,940 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 00:28:04,942 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 00:28:04,942 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 00:28:04,943 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 00:28:04,944 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 00:28:04,946 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 00:28:04,947 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 00:28:04,948 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 00:28:04,949 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 00:28:04,951 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 00:28:04,951 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 00:28:04,951 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 00:28:04,952 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 00:28:04,953 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 00:28:04,954 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 00:28:04,955 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 00:28:04,955 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 00:28:04,956 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 00:28:04,956 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 00:28:04,956 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 00:28:04,956 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 00:28:04,958 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 00:28:04,959 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 00:28:04,959 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-10-27 00:28:04,969 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 00:28:04,970 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 00:28:04,970 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 00:28:04,971 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 00:28:04,971 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 00:28:04,971 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 00:28:04,971 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 00:28:04,971 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 00:28:04,972 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 00:28:04,972 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-27 00:28:04,972 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-27 00:28:04,972 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 00:28:04,972 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 00:28:04,972 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 00:28:04,974 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 00:28:04,974 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-10-27 00:28:04,974 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-10-27 00:28:04,974 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-27 00:28:04,974 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 00:28:04,974 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 00:28:04,975 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 00:28:04,975 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 00:28:04,975 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 00:28:04,975 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 00:28:04,975 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 00:28:04,975 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 00:28:04,975 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 00:28:04,975 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 00:28:04,977 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-10-27 00:28:04,977 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 00:28:04,977 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-10-27 00:28:04,977 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-10-27 00:28:04,978 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_cf7911c8-785f-42ca-8ea5-41696155bd13/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 -> df3954142d6b55c98b13b60b9fbaf053d4d402ff [2018-10-27 00:28:05,011 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 00:28:05,022 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 00:28:05,025 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 00:28:05,026 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 00:28:05,027 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 00:28:05,027 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-10-27 00:28:05,069 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/data/9780edf04/5cb7a1be60e94b9298d6cdd6a26c60c6/FLAG6829f1e3e [2018-10-27 00:28:05,442 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 00:28:05,442 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-10-27 00:28:05,448 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/data/9780edf04/5cb7a1be60e94b9298d6cdd6a26c60c6/FLAG6829f1e3e [2018-10-27 00:28:05,458 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/data/9780edf04/5cb7a1be60e94b9298d6cdd6a26c60c6 [2018-10-27 00:28:05,463 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 00:28:05,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 00:28:05,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 00:28:05,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 00:28:05,469 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 00:28:05,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:28:05" (1/1) ... [2018-10-27 00:28:05,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@205a6579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:05, skipping insertion in model container [2018-10-27 00:28:05,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:28:05" (1/1) ... [2018-10-27 00:28:05,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 00:28:05,506 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 00:28:05,695 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 00:28:05,699 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 00:28:05,721 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 00:28:05,739 INFO L193 MainTranslator]: Completed translation [2018-10-27 00:28:05,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:05 WrapperNode [2018-10-27 00:28:05,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 00:28:05,740 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 00:28:05,740 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 00:28:05,740 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 00:28:05,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:05" (1/1) ... [2018-10-27 00:28:05,756 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:05" (1/1) ... [2018-10-27 00:28:05,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 00:28:05,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 00:28:05,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 00:28:05,773 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 00:28:05,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:05" (1/1) ... [2018-10-27 00:28:05,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:05" (1/1) ... [2018-10-27 00:28:05,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:05" (1/1) ... [2018-10-27 00:28:05,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:05" (1/1) ... [2018-10-27 00:28:05,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:05" (1/1) ... [2018-10-27 00:28:05,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:05" (1/1) ... [2018-10-27 00:28:05,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:05" (1/1) ... [2018-10-27 00:28:05,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 00:28:05,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 00:28:05,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 00:28:05,800 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 00:28:05,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:05,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 00:28:05,899 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 00:28:05,899 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2018-10-27 00:28:05,899 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2018-10-27 00:28:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-10-27 00:28:05,900 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-10-27 00:28:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-10-27 00:28:05,900 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-10-27 00:28:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 00:28:05,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 00:28:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 00:28:05,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 00:28:06,429 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 00:28:06,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:28:06 BoogieIcfgContainer [2018-10-27 00:28:06,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 00:28:06,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 00:28:06,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 00:28:06,434 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 00:28:06,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:28:05" (1/3) ... [2018-10-27 00:28:06,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2794f567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:28:06, skipping insertion in model container [2018-10-27 00:28:06,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:05" (2/3) ... [2018-10-27 00:28:06,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2794f567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:28:06, skipping insertion in model container [2018-10-27 00:28:06,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:28:06" (3/3) ... [2018-10-27 00:28:06,438 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251_true-unreach-call.c [2018-10-27 00:28:06,447 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 00:28:06,456 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-10-27 00:28:06,472 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-10-27 00:28:06,495 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-27 00:28:06,496 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 00:28:06,496 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 00:28:06,496 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 00:28:06,496 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 00:28:06,496 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 00:28:06,496 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 00:28:06,497 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 00:28:06,497 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 00:28:06,511 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-10-27 00:28:06,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-27 00:28:06,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:06,519 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] [2018-10-27 00:28:06,521 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:06,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:06,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1256839536, now seen corresponding path program 1 times [2018-10-27 00:28:06,529 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:06,530 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:06,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:06,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 00:28:06,622 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:06,635 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:06,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 00:28:06,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-27 00:28:06,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-27 00:28:06,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-27 00:28:06,651 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-10-27 00:28:06,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:06,675 INFO L93 Difference]: Finished difference Result 105 states and 146 transitions. [2018-10-27 00:28:06,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-27 00:28:06,676 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 35 [2018-10-27 00:28:06,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:06,686 INFO L225 Difference]: With dead ends: 105 [2018-10-27 00:28:06,686 INFO L226 Difference]: Without dead ends: 59 [2018-10-27 00:28:06,689 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 [2018-10-27 00:28:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-27 00:28:06,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-27 00:28:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-27 00:28:06,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2018-10-27 00:28:06,732 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 35 [2018-10-27 00:28:06,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:06,733 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2018-10-27 00:28:06,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-27 00:28:06,734 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2018-10-27 00:28:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-27 00:28:06,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:06,735 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] [2018-10-27 00:28:06,736 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:06,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:06,736 INFO L82 PathProgramCache]: Analyzing trace with hash -436144077, now seen corresponding path program 1 times [2018-10-27 00:28:06,736 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:06,737 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:06,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:06,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 00:28:06,852 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:06,862 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:06,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 00:28:06,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 00:28:06,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 00:28:06,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 00:28:06,864 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2018-10-27 00:28:07,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:07,006 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2018-10-27 00:28:07,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 00:28:07,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-10-27 00:28:07,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:07,009 INFO L225 Difference]: With dead ends: 108 [2018-10-27 00:28:07,009 INFO L226 Difference]: Without dead ends: 68 [2018-10-27 00:28:07,010 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 [2018-10-27 00:28:07,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-27 00:28:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2018-10-27 00:28:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-27 00:28:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-10-27 00:28:07,020 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-10-27 00:28:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:07,021 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-10-27 00:28:07,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 00:28:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-10-27 00:28:07,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-27 00:28:07,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:07,022 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] [2018-10-27 00:28:07,022 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:07,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:07,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1360757035, now seen corresponding path program 1 times [2018-10-27 00:28:07,023 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:07,023 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-10-27 00:28:07,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-10-27 00:28:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:07,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 00:28:07,188 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:07,200 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:07,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 00:28:07,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 00:28:07,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 00:28:07,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 00:28:07,201 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-10-27 00:28:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:07,278 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2018-10-27 00:28:07,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 00:28:07,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-10-27 00:28:07,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:07,282 INFO L225 Difference]: With dead ends: 86 [2018-10-27 00:28:07,282 INFO L226 Difference]: Without dead ends: 64 [2018-10-27 00:28:07,282 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 [2018-10-27 00:28:07,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-27 00:28:07,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-27 00:28:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-27 00:28:07,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-10-27 00:28:07,291 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 41 [2018-10-27 00:28:07,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:07,292 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-10-27 00:28:07,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 00:28:07,292 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-10-27 00:28:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-27 00:28:07,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:07,294 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] [2018-10-27 00:28:07,295 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:07,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:07,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2132693573, now seen corresponding path program 1 times [2018-10-27 00:28:07,296 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:07,296 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-10-27 00:28:07,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-10-27 00:28:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:07,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 00:28:07,395 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:07,408 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:07,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 00:28:07,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 00:28:07,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 00:28:07,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 00:28:07,410 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-10-27 00:28:07,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:07,439 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-10-27 00:28:07,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 00:28:07,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-10-27 00:28:07,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:07,442 INFO L225 Difference]: With dead ends: 89 [2018-10-27 00:28:07,442 INFO L226 Difference]: Without dead ends: 67 [2018-10-27 00:28:07,443 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 [2018-10-27 00:28:07,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-27 00:28:07,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-10-27 00:28:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-27 00:28:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-10-27 00:28:07,452 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 42 [2018-10-27 00:28:07,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:07,453 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-10-27 00:28:07,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 00:28:07,454 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-10-27 00:28:07,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-27 00:28:07,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:07,458 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] [2018-10-27 00:28:07,458 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:07,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:07,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1320240081, now seen corresponding path program 1 times [2018-10-27 00:28:07,459 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:07,459 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:07,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:07,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 00:28:07,543 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:07,552 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:07,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 00:28:07,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 00:28:07,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 00:28:07,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 00:28:07,553 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-10-27 00:28:07,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:07,610 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-10-27 00:28:07,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 00:28:07,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-10-27 00:28:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:07,613 INFO L225 Difference]: With dead ends: 89 [2018-10-27 00:28:07,613 INFO L226 Difference]: Without dead ends: 67 [2018-10-27 00:28:07,613 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 [2018-10-27 00:28:07,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-27 00:28:07,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-10-27 00:28:07,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-27 00:28:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-10-27 00:28:07,619 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 43 [2018-10-27 00:28:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:07,619 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-10-27 00:28:07,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 00:28:07,619 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-10-27 00:28:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-27 00:28:07,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:07,621 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] [2018-10-27 00:28:07,621 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:07,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:07,621 INFO L82 PathProgramCache]: Analyzing trace with hash -168745665, now seen corresponding path program 1 times [2018-10-27 00:28:07,622 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:07,622 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:07,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:07,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 00:28:07,764 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:07,785 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:07,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 00:28:07,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 00:28:07,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 00:28:07,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 00:28:07,786 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-10-27 00:28:07,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:07,863 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-10-27 00:28:07,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 00:28:07,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-10-27 00:28:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:07,868 INFO L225 Difference]: With dead ends: 89 [2018-10-27 00:28:07,868 INFO L226 Difference]: Without dead ends: 67 [2018-10-27 00:28:07,869 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 [2018-10-27 00:28:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-27 00:28:07,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-10-27 00:28:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-27 00:28:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-10-27 00:28:07,884 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 44 [2018-10-27 00:28:07,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:07,885 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-10-27 00:28:07,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 00:28:07,885 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-10-27 00:28:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-27 00:28:07,886 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:07,886 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] [2018-10-27 00:28:07,886 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:07,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1338806144, now seen corresponding path program 1 times [2018-10-27 00:28:07,887 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:07,887 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-10-27 00:28:07,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2018-10-27 00:28:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:07,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:08,150 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-27 00:28:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 00:28:08,280 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 00:28:08,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:28:08,770 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-27 00:28:08,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:28:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:08,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 00:28:08,855 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:08,872 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:28:08,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 14 [2018-10-27 00:28:08,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-27 00:28:08,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-27 00:28:08,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-10-27 00:28:08,873 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 14 states. [2018-10-27 00:28:09,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:09,534 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2018-10-27 00:28:09,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 00:28:09,543 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2018-10-27 00:28:09,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:09,544 INFO L225 Difference]: With dead ends: 105 [2018-10-27 00:28:09,544 INFO L226 Difference]: Without dead ends: 91 [2018-10-27 00:28:09,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-10-27 00:28:09,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-27 00:28:09,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2018-10-27 00:28:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-27 00:28:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2018-10-27 00:28:09,554 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 44 [2018-10-27 00:28:09,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:09,554 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2018-10-27 00:28:09,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-27 00:28:09,554 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2018-10-27 00:28:09,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-27 00:28:09,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:09,555 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] [2018-10-27 00:28:09,555 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:09,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:09,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1637778421, now seen corresponding path program 1 times [2018-10-27 00:28:09,556 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:09,556 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:09,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:09,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-27 00:28:09,794 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-27 00:28:10,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:28:10,212 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:10,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:10,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-27 00:28:10,510 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-27 00:28:10,927 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2018-10-27 00:28:10,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11, 11] total 29 [2018-10-27 00:28:10,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-27 00:28:10,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-27 00:28:10,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2018-10-27 00:28:10,929 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand 29 states. [2018-10-27 00:28:13,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:13,449 INFO L93 Difference]: Finished difference Result 136 states and 179 transitions. [2018-10-27 00:28:13,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-27 00:28:13,449 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 49 [2018-10-27 00:28:13,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:13,453 INFO L225 Difference]: With dead ends: 136 [2018-10-27 00:28:13,453 INFO L226 Difference]: Without dead ends: 134 [2018-10-27 00:28:13,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2018-10-27 00:28:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-27 00:28:13,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2018-10-27 00:28:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-27 00:28:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2018-10-27 00:28:13,467 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 49 [2018-10-27 00:28:13,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:13,467 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2018-10-27 00:28:13,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-27 00:28:13,467 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2018-10-27 00:28:13,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-27 00:28:13,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:13,468 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] [2018-10-27 00:28:13,470 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:13,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:13,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2035503454, now seen corresponding path program 1 times [2018-10-27 00:28:13,471 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:13,471 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:13,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:13,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-27 00:28:13,596 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:13,605 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:13,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-10-27 00:28:13,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 00:28:13,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 00:28:13,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-27 00:28:13,606 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand 8 states. [2018-10-27 00:28:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:14,070 INFO L93 Difference]: Finished difference Result 158 states and 208 transitions. [2018-10-27 00:28:14,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 00:28:14,070 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2018-10-27 00:28:14,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:14,071 INFO L225 Difference]: With dead ends: 158 [2018-10-27 00:28:14,072 INFO L226 Difference]: Without dead ends: 105 [2018-10-27 00:28:14,072 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 [2018-10-27 00:28:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-27 00:28:14,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2018-10-27 00:28:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-27 00:28:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2018-10-27 00:28:14,082 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 53 [2018-10-27 00:28:14,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:14,083 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2018-10-27 00:28:14,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 00:28:14,083 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2018-10-27 00:28:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-27 00:28:14,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:14,084 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] [2018-10-27 00:28:14,084 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:14,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:14,087 INFO L82 PathProgramCache]: Analyzing trace with hash -917330638, now seen corresponding path program 1 times [2018-10-27 00:28:14,087 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:14,087 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:14,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:14,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-27 00:28:14,241 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-10-27 00:28:14,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:28:14,454 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:14,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:14,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-27 00:28:14,759 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:14,786 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:28:14,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 13 [2018-10-27 00:28:14,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-27 00:28:14,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-27 00:28:14,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-10-27 00:28:14,787 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand 13 states. [2018-10-27 00:28:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:15,569 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2018-10-27 00:28:15,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 00:28:15,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2018-10-27 00:28:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:15,570 INFO L225 Difference]: With dead ends: 110 [2018-10-27 00:28:15,570 INFO L226 Difference]: Without dead ends: 106 [2018-10-27 00:28:15,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-10-27 00:28:15,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-27 00:28:15,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2018-10-27 00:28:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-27 00:28:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2018-10-27 00:28:15,581 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 58 [2018-10-27 00:28:15,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:15,582 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2018-10-27 00:28:15,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-27 00:28:15,582 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2018-10-27 00:28:15,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-27 00:28:15,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:15,583 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] [2018-10-27 00:28:15,583 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:15,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:15,583 INFO L82 PathProgramCache]: Analyzing trace with hash 221870355, now seen corresponding path program 1 times [2018-10-27 00:28:15,584 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:15,584 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:15,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:15,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-10-27 00:28:15,715 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:15,728 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:15,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 00:28:15,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 00:28:15,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 00:28:15,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 00:28:15,730 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand 4 states. [2018-10-27 00:28:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:15,743 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2018-10-27 00:28:15,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 00:28:15,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2018-10-27 00:28:15,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:15,745 INFO L225 Difference]: With dead ends: 119 [2018-10-27 00:28:15,745 INFO L226 Difference]: Without dead ends: 92 [2018-10-27 00:28:15,746 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 [2018-10-27 00:28:15,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-27 00:28:15,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-27 00:28:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-27 00:28:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-10-27 00:28:15,756 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 61 [2018-10-27 00:28:15,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:15,756 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-10-27 00:28:15,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 00:28:15,756 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-10-27 00:28:15,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-27 00:28:15,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:15,759 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] [2018-10-27 00:28:15,759 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:15,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:15,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1743084858, now seen corresponding path program 1 times [2018-10-27 00:28:15,760 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:15,760 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:15,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:15,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-27 00:28:15,821 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:15,829 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:15,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 00:28:15,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 00:28:15,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 00:28:15,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 00:28:15,830 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 4 states. [2018-10-27 00:28:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:15,847 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2018-10-27 00:28:15,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 00:28:15,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-10-27 00:28:15,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:15,849 INFO L225 Difference]: With dead ends: 122 [2018-10-27 00:28:15,849 INFO L226 Difference]: Without dead ends: 95 [2018-10-27 00:28:15,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 00:28:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-27 00:28:15,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2018-10-27 00:28:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-27 00:28:15,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-10-27 00:28:15,859 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 55 [2018-10-27 00:28:15,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:15,859 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-10-27 00:28:15,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 00:28:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-10-27 00:28:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-27 00:28:15,860 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:15,860 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] [2018-10-27 00:28:15,860 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:15,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:15,863 INFO L82 PathProgramCache]: Analyzing trace with hash -448157192, now seen corresponding path program 1 times [2018-10-27 00:28:15,863 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:15,863 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:15,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:15,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-27 00:28:16,117 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:16,126 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:16,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-10-27 00:28:16,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 00:28:16,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 00:28:16,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-27 00:28:16,127 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 9 states. [2018-10-27 00:28:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:16,874 INFO L93 Difference]: Finished difference Result 147 states and 189 transitions. [2018-10-27 00:28:16,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 00:28:16,875 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2018-10-27 00:28:16,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:16,876 INFO L225 Difference]: With dead ends: 147 [2018-10-27 00:28:16,876 INFO L226 Difference]: Without dead ends: 122 [2018-10-27 00:28:16,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-10-27 00:28:16,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-27 00:28:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2018-10-27 00:28:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-27 00:28:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2018-10-27 00:28:16,888 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 63 [2018-10-27 00:28:16,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:16,889 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2018-10-27 00:28:16,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 00:28:16,890 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2018-10-27 00:28:16,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-27 00:28:16,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:16,891 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] [2018-10-27 00:28:16,891 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:16,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:16,891 INFO L82 PathProgramCache]: Analyzing trace with hash 525027593, now seen corresponding path program 1 times [2018-10-27 00:28:16,891 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:16,891 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:16,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:16,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-27 00:28:17,133 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:17,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:28:17,280 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:17,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:17,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-27 00:28:17,328 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:17,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:28:17,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-27 00:28:17,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 00:28:17,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 00:28:17,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-10-27 00:28:17,500 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand 8 states. [2018-10-27 00:28:18,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:18,333 INFO L93 Difference]: Finished difference Result 134 states and 170 transitions. [2018-10-27 00:28:18,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 00:28:18,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2018-10-27 00:28:18,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:18,335 INFO L225 Difference]: With dead ends: 134 [2018-10-27 00:28:18,336 INFO L226 Difference]: Without dead ends: 111 [2018-10-27 00:28:18,336 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 [2018-10-27 00:28:18,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-27 00:28:18,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2018-10-27 00:28:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-27 00:28:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 120 transitions. [2018-10-27 00:28:18,347 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 120 transitions. Word has length 56 [2018-10-27 00:28:18,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:18,347 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 120 transitions. [2018-10-27 00:28:18,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 00:28:18,347 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 120 transitions. [2018-10-27 00:28:18,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-27 00:28:18,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:18,348 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] [2018-10-27 00:28:18,348 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:18,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:18,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1469117113, now seen corresponding path program 1 times [2018-10-27 00:28:18,349 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:18,349 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-10-27 00:28:18,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2018-10-27 00:28:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:18,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 00:28:18,617 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:18,629 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:18,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-10-27 00:28:18,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-27 00:28:18,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-27 00:28:18,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-10-27 00:28:18,631 INFO L87 Difference]: Start difference. First operand 92 states and 120 transitions. Second operand 11 states. [2018-10-27 00:28:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:19,326 INFO L93 Difference]: Finished difference Result 121 states and 156 transitions. [2018-10-27 00:28:19,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-27 00:28:19,328 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-10-27 00:28:19,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:19,328 INFO L225 Difference]: With dead ends: 121 [2018-10-27 00:28:19,329 INFO L226 Difference]: Without dead ends: 119 [2018-10-27 00:28:19,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-10-27 00:28:19,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-27 00:28:19,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2018-10-27 00:28:19,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-27 00:28:19,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2018-10-27 00:28:19,342 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 56 [2018-10-27 00:28:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:19,342 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2018-10-27 00:28:19,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-27 00:28:19,342 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2018-10-27 00:28:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-27 00:28:19,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:19,343 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] [2018-10-27 00:28:19,343 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:19,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:19,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1422897632, now seen corresponding path program 1 times [2018-10-27 00:28:19,344 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:19,344 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2018-10-27 00:28:19,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:19,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-27 00:28:19,414 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:19,422 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:19,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 00:28:19,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 00:28:19,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 00:28:19,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 00:28:19,423 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 4 states. [2018-10-27 00:28:19,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:19,447 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2018-10-27 00:28:19,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 00:28:19,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-10-27 00:28:19,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:19,449 INFO L225 Difference]: With dead ends: 127 [2018-10-27 00:28:19,449 INFO L226 Difference]: Without dead ends: 100 [2018-10-27 00:28:19,450 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 [2018-10-27 00:28:19,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-27 00:28:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2018-10-27 00:28:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-27 00:28:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2018-10-27 00:28:19,462 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 56 [2018-10-27 00:28:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:19,463 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2018-10-27 00:28:19,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 00:28:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2018-10-27 00:28:19,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-27 00:28:19,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:19,464 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] [2018-10-27 00:28:19,464 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:19,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:19,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1531309075, now seen corresponding path program 1 times [2018-10-27 00:28:19,468 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:19,468 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:19,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:19,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-27 00:28:20,000 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:20,478 WARN L179 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2018-10-27 00:28:20,882 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2018-10-27 00:28:21,201 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2018-10-27 00:28:21,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:28:21,531 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:28:21,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:21,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-27 00:28:21,750 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:21,898 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2018-10-27 00:28:22,432 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2018-10-27 00:28:22,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:28:22,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 17 [2018-10-27 00:28:22,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 00:28:22,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 00:28:22,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-10-27 00:28:22,685 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 17 states. [2018-10-27 00:28:24,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:24,298 INFO L93 Difference]: Finished difference Result 154 states and 201 transitions. [2018-10-27 00:28:24,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-27 00:28:24,299 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-27 00:28:24,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:24,300 INFO L225 Difference]: With dead ends: 154 [2018-10-27 00:28:24,300 INFO L226 Difference]: Without dead ends: 127 [2018-10-27 00:28:24,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2018-10-27 00:28:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-27 00:28:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2018-10-27 00:28:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-27 00:28:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2018-10-27 00:28:24,311 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 63 [2018-10-27 00:28:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:24,312 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2018-10-27 00:28:24,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 00:28:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2018-10-27 00:28:24,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-27 00:28:24,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:24,314 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, 1, 1] [2018-10-27 00:28:24,315 INFO L424 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:24,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:24,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1082608614, now seen corresponding path program 1 times [2018-10-27 00:28:24,316 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:24,316 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:24,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:24,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-10-27 00:28:24,541 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-10-27 00:28:24,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:28:24,829 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:24,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:24,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-27 00:28:24,911 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-10-27 00:28:25,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-27 00:28:25,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 12] total 17 [2018-10-27 00:28:25,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 00:28:25,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 00:28:25,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-10-27 00:28:25,093 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 17 states. [2018-10-27 00:28:25,786 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-27 00:28:26,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:26,010 INFO L93 Difference]: Finished difference Result 149 states and 192 transitions. [2018-10-27 00:28:26,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 00:28:26,011 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2018-10-27 00:28:26,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:26,012 INFO L225 Difference]: With dead ends: 149 [2018-10-27 00:28:26,012 INFO L226 Difference]: Without dead ends: 119 [2018-10-27 00:28:26,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2018-10-27 00:28:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-27 00:28:26,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2018-10-27 00:28:26,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-27 00:28:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2018-10-27 00:28:26,020 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 64 [2018-10-27 00:28:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:26,020 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2018-10-27 00:28:26,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 00:28:26,020 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2018-10-27 00:28:26,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-27 00:28:26,021 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:26,021 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] [2018-10-27 00:28:26,022 INFO L424 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:26,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:26,022 INFO L82 PathProgramCache]: Analyzing trace with hash -978651351, now seen corresponding path program 1 times [2018-10-27 00:28:26,022 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:26,022 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:26,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:26,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-27 00:28:26,290 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:26,481 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-27 00:28:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-27 00:28:26,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:28:26,802 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:26,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:26,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 00:28:27,521 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:27,551 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:28:27,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 12] total 29 [2018-10-27 00:28:27,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-27 00:28:27,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-27 00:28:27,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2018-10-27 00:28:27,552 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand 29 states. [2018-10-27 00:28:29,705 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2018-10-27 00:28:30,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:30,457 INFO L93 Difference]: Finished difference Result 185 states and 240 transitions. [2018-10-27 00:28:30,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-27 00:28:30,458 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-10-27 00:28:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:30,459 INFO L225 Difference]: With dead ends: 185 [2018-10-27 00:28:30,459 INFO L226 Difference]: Without dead ends: 183 [2018-10-27 00:28:30,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=180, Invalid=1302, Unknown=0, NotChecked=0, Total=1482 [2018-10-27 00:28:30,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-27 00:28:30,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 111. [2018-10-27 00:28:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-27 00:28:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 148 transitions. [2018-10-27 00:28:30,472 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 148 transitions. Word has length 57 [2018-10-27 00:28:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:30,472 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 148 transitions. [2018-10-27 00:28:30,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-27 00:28:30,472 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 148 transitions. [2018-10-27 00:28:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-27 00:28:30,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:30,475 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] [2018-10-27 00:28:30,475 INFO L424 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:30,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:30,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1722325118, now seen corresponding path program 1 times [2018-10-27 00:28:30,476 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:30,476 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:30,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:30,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-27 00:28:30,541 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:30,549 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:30,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 00:28:30,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 00:28:30,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 00:28:30,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 00:28:30,550 INFO L87 Difference]: Start difference. First operand 111 states and 148 transitions. Second operand 4 states. [2018-10-27 00:28:30,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:30,567 INFO L93 Difference]: Finished difference Result 142 states and 187 transitions. [2018-10-27 00:28:30,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 00:28:30,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-10-27 00:28:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:30,569 INFO L225 Difference]: With dead ends: 142 [2018-10-27 00:28:30,569 INFO L226 Difference]: Without dead ends: 113 [2018-10-27 00:28:30,570 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 [2018-10-27 00:28:30,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-27 00:28:30,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-10-27 00:28:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-27 00:28:30,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 144 transitions. [2018-10-27 00:28:30,582 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 144 transitions. Word has length 57 [2018-10-27 00:28:30,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:30,582 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 144 transitions. [2018-10-27 00:28:30,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 00:28:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 144 transitions. [2018-10-27 00:28:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-27 00:28:30,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:30,584 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] [2018-10-27 00:28:30,584 INFO L424 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:30,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:30,584 INFO L82 PathProgramCache]: Analyzing trace with hash 296411082, now seen corresponding path program 1 times [2018-10-27 00:28:30,584 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:30,588 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/mathsat Starting monitored process 29 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-10-27 00:28:30,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 29 with mathsat -unsat_core_generation=3 [2018-10-27 00:28:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:30,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-27 00:28:30,732 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-27 00:28:31,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:28:31,021 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:28:31,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:31,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-27 00:28:31,095 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-27 00:28:31,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-27 00:28:31,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9] total 13 [2018-10-27 00:28:31,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-27 00:28:31,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-27 00:28:31,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-10-27 00:28:31,338 INFO L87 Difference]: Start difference. First operand 109 states and 144 transitions. Second operand 13 states. [2018-10-27 00:28:31,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:31,812 INFO L93 Difference]: Finished difference Result 191 states and 238 transitions. [2018-10-27 00:28:31,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-27 00:28:31,813 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2018-10-27 00:28:31,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:31,814 INFO L225 Difference]: With dead ends: 191 [2018-10-27 00:28:31,814 INFO L226 Difference]: Without dead ends: 111 [2018-10-27 00:28:31,815 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 [2018-10-27 00:28:31,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-27 00:28:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2018-10-27 00:28:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-27 00:28:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2018-10-27 00:28:31,825 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 69 [2018-10-27 00:28:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:31,826 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2018-10-27 00:28:31,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-27 00:28:31,826 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2018-10-27 00:28:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-27 00:28:31,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:31,827 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] [2018-10-27 00:28:31,827 INFO L424 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:31,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:31,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2131149343, now seen corresponding path program 1 times [2018-10-27 00:28:31,827 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:31,827 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/mathsat Starting monitored process 31 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with mathsat -unsat_core_generation=3 [2018-10-27 00:28:31,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:31,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 00:28:32,379 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:32,392 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:32,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2018-10-27 00:28:32,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-27 00:28:32,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-27 00:28:32,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-10-27 00:28:32,393 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 15 states. [2018-10-27 00:28:33,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:33,753 INFO L93 Difference]: Finished difference Result 130 states and 163 transitions. [2018-10-27 00:28:33,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-27 00:28:33,755 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-10-27 00:28:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:33,756 INFO L225 Difference]: With dead ends: 130 [2018-10-27 00:28:33,756 INFO L226 Difference]: Without dead ends: 96 [2018-10-27 00:28:33,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2018-10-27 00:28:33,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-27 00:28:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2018-10-27 00:28:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-27 00:28:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2018-10-27 00:28:33,771 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 57 [2018-10-27 00:28:33,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:33,771 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2018-10-27 00:28:33,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-27 00:28:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2018-10-27 00:28:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-27 00:28:33,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:33,772 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] [2018-10-27 00:28:33,776 INFO L424 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:33,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:33,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1504540697, now seen corresponding path program 1 times [2018-10-27 00:28:33,776 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:33,776 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:33,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:33,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-27 00:28:34,395 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-10-27 00:28:34,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:28:34,805 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:34,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:34,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-27 00:28:34,878 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-10-27 00:28:35,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-27 00:28:35,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 9] total 17 [2018-10-27 00:28:35,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 00:28:35,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 00:28:35,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-10-27 00:28:35,199 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 17 states. [2018-10-27 00:28:36,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:36,294 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2018-10-27 00:28:36,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 00:28:36,295 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2018-10-27 00:28:36,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:36,296 INFO L225 Difference]: With dead ends: 92 [2018-10-27 00:28:36,296 INFO L226 Difference]: Without dead ends: 60 [2018-10-27 00:28:36,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2018-10-27 00:28:36,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-27 00:28:36,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2018-10-27 00:28:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-27 00:28:36,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2018-10-27 00:28:36,300 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 61 [2018-10-27 00:28:36,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:36,300 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2018-10-27 00:28:36,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 00:28:36,300 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2018-10-27 00:28:36,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-27 00:28:36,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:36,305 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] [2018-10-27 00:28:36,305 INFO L424 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:36,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:36,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1474938307, now seen corresponding path program 1 times [2018-10-27 00:28:36,306 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:36,306 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/mathsat Starting monitored process 34 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-10-27 00:28:36,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 34 with mathsat -unsat_core_generation=3 [2018-10-27 00:28:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:36,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-27 00:28:36,725 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:36,732 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:36,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-10-27 00:28:36,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 00:28:36,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 00:28:36,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-27 00:28:36,733 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 12 states. [2018-10-27 00:28:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:37,336 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2018-10-27 00:28:37,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 00:28:37,337 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2018-10-27 00:28:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:37,337 INFO L225 Difference]: With dead ends: 79 [2018-10-27 00:28:37,338 INFO L226 Difference]: Without dead ends: 58 [2018-10-27 00:28:37,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-10-27 00:28:37,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-27 00:28:37,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-27 00:28:37,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-27 00:28:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-10-27 00:28:37,341 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 70 [2018-10-27 00:28:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:37,342 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-10-27 00:28:37,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 00:28:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-10-27 00:28:37,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-27 00:28:37,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:37,342 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] [2018-10-27 00:28:37,343 INFO L424 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:37,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:37,343 INFO L82 PathProgramCache]: Analyzing trace with hash 170055519, now seen corresponding path program 1 times [2018-10-27 00:28:37,343 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:37,343 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:37,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:37,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-27 00:28:37,655 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:37,662 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:37,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-10-27 00:28:37,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 00:28:37,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 00:28:37,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-27 00:28:37,663 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 12 states. [2018-10-27 00:28:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:38,410 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2018-10-27 00:28:38,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 00:28:38,411 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2018-10-27 00:28:38,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:38,412 INFO L225 Difference]: With dead ends: 81 [2018-10-27 00:28:38,412 INFO L226 Difference]: Without dead ends: 60 [2018-10-27 00:28:38,413 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 [2018-10-27 00:28:38,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-27 00:28:38,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2018-10-27 00:28:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-27 00:28:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-10-27 00:28:38,416 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 71 [2018-10-27 00:28:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:38,418 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-10-27 00:28:38,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 00:28:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-10-27 00:28:38,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-27 00:28:38,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:38,419 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] [2018-10-27 00:28:38,419 INFO L424 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:38,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:38,420 INFO L82 PathProgramCache]: Analyzing trace with hash -684584537, now seen corresponding path program 1 times [2018-10-27 00:28:38,420 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:38,420 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:38,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:38,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:39,150 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 00:28:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-10-27 00:28:39,275 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-10-27 00:28:40,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:28:40,385 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:40,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:40,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-10-27 00:28:40,588 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:41,129 WARN L179 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-10-27 00:28:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-10-27 00:28:41,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-27 00:28:41,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 17 [2018-10-27 00:28:41,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 00:28:41,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 00:28:41,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-10-27 00:28:41,460 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 17 states. [2018-10-27 00:28:42,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:42,132 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2018-10-27 00:28:42,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 00:28:42,133 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-10-27 00:28:42,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:42,134 INFO L225 Difference]: With dead ends: 83 [2018-10-27 00:28:42,134 INFO L226 Difference]: Without dead ends: 68 [2018-10-27 00:28:42,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 262 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2018-10-27 00:28:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-27 00:28:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2018-10-27 00:28:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-27 00:28:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-10-27 00:28:42,140 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 71 [2018-10-27 00:28:42,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:42,140 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-10-27 00:28:42,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 00:28:42,140 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-10-27 00:28:42,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-27 00:28:42,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:42,141 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] [2018-10-27 00:28:42,141 INFO L424 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:42,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:42,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1145801543, now seen corresponding path program 1 times [2018-10-27 00:28:42,141 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:42,141 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/mathsat Starting monitored process 38 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-10-27 00:28:42,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 38 with mathsat -unsat_core_generation=3 [2018-10-27 00:28:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:42,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-27 00:28:42,507 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:42,514 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:42,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-10-27 00:28:42,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 00:28:42,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 00:28:42,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-27 00:28:42,515 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 12 states. [2018-10-27 00:28:43,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:43,298 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2018-10-27 00:28:43,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 00:28:43,299 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2018-10-27 00:28:43,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:43,300 INFO L225 Difference]: With dead ends: 85 [2018-10-27 00:28:43,300 INFO L226 Difference]: Without dead ends: 64 [2018-10-27 00:28:43,300 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 [2018-10-27 00:28:43,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-27 00:28:43,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2018-10-27 00:28:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-27 00:28:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-10-27 00:28:43,304 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 72 [2018-10-27 00:28:43,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:43,309 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-10-27 00:28:43,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 00:28:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-10-27 00:28:43,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-27 00:28:43,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:43,309 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] [2018-10-27 00:28:43,310 INFO L424 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:43,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:43,310 INFO L82 PathProgramCache]: Analyzing trace with hash 56032537, now seen corresponding path program 1 times [2018-10-27 00:28:43,310 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:43,310 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:43,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:43,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-27 00:28:43,521 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-27 00:28:43,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:28:43,849 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:43,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:43,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-10-27 00:28:44,054 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:28:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-27 00:28:44,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-27 00:28:44,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12, 13] total 22 [2018-10-27 00:28:44,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-27 00:28:44,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-27 00:28:44,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2018-10-27 00:28:44,276 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 22 states. [2018-10-27 00:28:44,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:44,860 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2018-10-27 00:28:44,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 00:28:44,861 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2018-10-27 00:28:44,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:44,862 INFO L225 Difference]: With dead ends: 78 [2018-10-27 00:28:44,862 INFO L226 Difference]: Without dead ends: 63 [2018-10-27 00:28:44,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2018-10-27 00:28:44,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-27 00:28:44,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2018-10-27 00:28:44,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-27 00:28:44,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2018-10-27 00:28:44,868 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 72 [2018-10-27 00:28:44,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:44,868 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2018-10-27 00:28:44,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-27 00:28:44,868 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2018-10-27 00:28:44,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-27 00:28:44,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:44,869 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] [2018-10-27 00:28:44,869 INFO L424 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:44,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:44,869 INFO L82 PathProgramCache]: Analyzing trace with hash -193403293, now seen corresponding path program 1 times [2018-10-27 00:28:44,869 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:44,869 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/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 [2018-10-27 00:28:44,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:28:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:44,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-27 00:28:45,108 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:45,115 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:45,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-10-27 00:28:45,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 00:28:45,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 00:28:45,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-27 00:28:45,116 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 12 states. [2018-10-27 00:28:45,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:45,722 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2018-10-27 00:28:45,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 00:28:45,723 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2018-10-27 00:28:45,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:45,723 INFO L225 Difference]: With dead ends: 78 [2018-10-27 00:28:45,723 INFO L226 Difference]: Without dead ends: 57 [2018-10-27 00:28:45,724 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 [2018-10-27 00:28:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-27 00:28:45,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2018-10-27 00:28:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-27 00:28:45,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2018-10-27 00:28:45,728 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 73 [2018-10-27 00:28:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:45,728 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2018-10-27 00:28:45,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 00:28:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2018-10-27 00:28:45,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-27 00:28:45,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:28:45,733 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] [2018-10-27 00:28:45,733 INFO L424 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:28:45,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:28:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash 499698404, now seen corresponding path program 1 times [2018-10-27 00:28:45,733 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-27 00:28:45,733 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/mathsat Starting monitored process 42 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-10-27 00:28:45,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 42 with mathsat -unsat_core_generation=3 [2018-10-27 00:28:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:28:45,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:28:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-10-27 00:28:45,809 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-27 00:28:45,818 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:28:45,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 00:28:45,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 00:28:45,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 00:28:45,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 00:28:45,819 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 4 states. [2018-10-27 00:28:45,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:28:45,825 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-10-27 00:28:45,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 00:28:45,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2018-10-27 00:28:45,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:28:45,826 INFO L225 Difference]: With dead ends: 58 [2018-10-27 00:28:45,826 INFO L226 Difference]: Without dead ends: 0 [2018-10-27 00:28:45,827 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 [2018-10-27 00:28:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-27 00:28:45,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-27 00:28:45,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-27 00:28:45,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-27 00:28:45,827 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2018-10-27 00:28:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:28:45,827 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 00:28:45,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 00:28:45,828 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-27 00:28:45,828 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-27 00:28:45,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-27 00:28:46,359 INFO L425 ceAbstractionStarter]: For program point isnan_floatFINAL(line 55) no Hoare annotation was computed. [2018-10-27 00:28:46,359 INFO L428 ceAbstractionStarter]: At program point isnan_floatENTRY(line 55) the Hoare annotation is: true [2018-10-27 00:28:46,359 INFO L425 ceAbstractionStarter]: For program point isnan_floatEXIT(line 55) no Hoare annotation was computed. [2018-10-27 00:28:46,360 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-10-27 00:28:46,360 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-10-27 00:28:46,360 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-27 00:28:46,360 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-27 00:28:46,360 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-27 00:28:46,360 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-27 00:28:46,360 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-27 00:28:46,360 INFO L421 ceAbstractionStarter]: At program point L68-3(line 68) the Hoare annotation is: (and (not |main_#t~short9|) (not |main_#t~short13|) (fp.eq main_~x~0 main_~x~0) (= (_ bv0 32) |main_#t~ret7|) (= |main_#t~ret10| (_ bv0 32)) |main_#t~short12|) [2018-10-27 00:28:46,360 INFO L425 ceAbstractionStarter]: For program point L68-4(line 68) no Hoare annotation was computed. [2018-10-27 00:28:46,360 INFO L425 ceAbstractionStarter]: For program point L68-6(line 68) no Hoare annotation was computed. [2018-10-27 00:28:46,360 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 57 86) no Hoare annotation was computed. [2018-10-27 00:28:46,360 INFO L425 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 80) no Hoare annotation was computed. [2018-10-27 00:28:46,361 INFO L421 ceAbstractionStarter]: At program point L73(line 73) 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 (= main_~x~0 main_~res~0) .cse0 (not .cse1)) (and (= main_~y~0 main_~res~0) .cse1 (not .cse0)))) [2018-10-27 00:28:46,361 INFO L425 ceAbstractionStarter]: For program point L73-1(line 73) no Hoare annotation was computed. [2018-10-27 00:28:46,361 INFO L425 ceAbstractionStarter]: For program point L73-2(line 73) no Hoare annotation was computed. [2018-10-27 00:28:46,361 INFO L421 ceAbstractionStarter]: At program point L73-3(line 73) the Hoare annotation is: (and (= main_~y~0 main_~res~0) |main_#t~short17| (= (_ bv1 32) |main_#t~ret15|) (fp.eq main_~y~0 main_~y~0) (not (fp.eq main_~x~0 main_~x~0))) [2018-10-27 00:28:46,361 INFO L425 ceAbstractionStarter]: For program point L73-4(line 73) no Hoare annotation was computed. [2018-10-27 00:28:46,361 INFO L425 ceAbstractionStarter]: For program point L73-6(lines 73 76) no Hoare annotation was computed. [2018-10-27 00:28:46,361 INFO L425 ceAbstractionStarter]: For program point L74(line 74) no Hoare annotation was computed. [2018-10-27 00:28:46,361 INFO L421 ceAbstractionStarter]: At program point L70(line 70) 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)))) [2018-10-27 00:28:46,361 INFO L425 ceAbstractionStarter]: For program point L70-1(line 70) no Hoare annotation was computed. [2018-10-27 00:28:46,361 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 74) no Hoare annotation was computed. [2018-10-27 00:28:46,361 INFO L421 ceAbstractionStarter]: At program point L79(line 79) 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))) [2018-10-27 00:28:46,361 INFO L425 ceAbstractionStarter]: For program point L79-1(line 79) no Hoare annotation was computed. [2018-10-27 00:28:46,361 INFO L425 ceAbstractionStarter]: For program point L79-2(line 79) no Hoare annotation was computed. [2018-10-27 00:28:46,361 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 57 86) no Hoare annotation was computed. [2018-10-27 00:28:46,362 INFO L421 ceAbstractionStarter]: At program point L79-3(line 79) the Hoare annotation is: (and (= main_~x~0 main_~res~0) (fp.eq main_~x~0 main_~x~0) |main_#t~short20| (not (fp.eq main_~y~0 main_~y~0))) [2018-10-27 00:28:46,362 INFO L425 ceAbstractionStarter]: For program point L79-4(line 79) no Hoare annotation was computed. [2018-10-27 00:28:46,362 INFO L425 ceAbstractionStarter]: For program point L79-6(lines 79 82) no Hoare annotation was computed. [2018-10-27 00:28:46,362 INFO L428 ceAbstractionStarter]: At program point L67(line 67) the Hoare annotation is: true [2018-10-27 00:28:46,362 INFO L425 ceAbstractionStarter]: For program point L67-1(line 67) no Hoare annotation was computed. [2018-10-27 00:28:46,362 INFO L425 ceAbstractionStarter]: For program point L67-2(line 67) no Hoare annotation was computed. [2018-10-27 00:28:46,362 INFO L421 ceAbstractionStarter]: At program point L67-3(line 67) the Hoare annotation is: (and (= (_ bv1 32) |main_#t~ret7|) |main_#t~short9| (not (fp.eq main_~x~0 main_~x~0))) [2018-10-27 00:28:46,362 INFO L425 ceAbstractionStarter]: For program point L67-4(line 67) no Hoare annotation was computed. [2018-10-27 00:28:46,362 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 57 86) the Hoare annotation is: true [2018-10-27 00:28:46,362 INFO L425 ceAbstractionStarter]: For program point L67-6(line 67) no Hoare annotation was computed. [2018-10-27 00:28:46,362 INFO L425 ceAbstractionStarter]: For program point L67-7(lines 67 68) no Hoare annotation was computed. [2018-10-27 00:28:46,362 INFO L425 ceAbstractionStarter]: For program point L67-9(lines 67 83) no Hoare annotation was computed. [2018-10-27 00:28:46,362 INFO L425 ceAbstractionStarter]: For program point L67-11(lines 67 83) no Hoare annotation was computed. [2018-10-27 00:28:46,362 INFO L425 ceAbstractionStarter]: For program point L80(line 80) no Hoare annotation was computed. [2018-10-27 00:28:46,363 INFO L421 ceAbstractionStarter]: At program point L68(line 68) the Hoare annotation is: (let ((.cse2 (fp.eq main_~x~0 main_~x~0)) (.cse0 (not |main_#t~short9|)) (.cse1 (not |main_#t~short13|))) (or (and .cse0 .cse1 .cse2 (= (_ bv0 32) |main_#t~ret7|)) (and (and (= (_ bv1 32) |main_#t~ret7|) (not .cse2)) (= (bvadd |main_#t~ret8| (_ bv4294967295 32)) (_ bv0 32)) .cse0 .cse1 (not (fp.eq main_~y~0 main_~y~0))))) [2018-10-27 00:28:46,363 INFO L425 ceAbstractionStarter]: For program point L68-1(line 68) no Hoare annotation was computed. [2018-10-27 00:28:46,363 INFO L425 ceAbstractionStarter]: For program point L68-2(line 68) no Hoare annotation was computed. [2018-10-27 00:28:46,363 INFO L425 ceAbstractionStarter]: For program point fmax_floatEXIT(lines 43 52) no Hoare annotation was computed. [2018-10-27 00:28:46,363 INFO L428 ceAbstractionStarter]: At program point fmax_floatENTRY(lines 43 52) the Hoare annotation is: true [2018-10-27 00:28:46,363 INFO L425 ceAbstractionStarter]: For program point L51(line 51) no Hoare annotation was computed. [2018-10-27 00:28:46,363 INFO L425 ceAbstractionStarter]: For program point L51-2(line 51) no Hoare annotation was computed. [2018-10-27 00:28:46,363 INFO L421 ceAbstractionStarter]: At program point L48(line 48) the Hoare annotation is: (and (= |fmax_float_#in~y| fmax_float_~y) (= |fmax_float_#in~x| fmax_float_~x)) [2018-10-27 00:28:46,363 INFO L425 ceAbstractionStarter]: For program point L48-1(lines 48 50) no Hoare annotation was computed. [2018-10-27 00:28:46,363 INFO L421 ceAbstractionStarter]: At program point L44(line 44) the Hoare annotation is: (and (= |fmax_float_#in~y| fmax_float_~y) (= |fmax_float_#in~x| fmax_float_~x)) [2018-10-27 00:28:46,363 INFO L425 ceAbstractionStarter]: For program point L44-1(lines 44 46) no Hoare annotation was computed. [2018-10-27 00:28:46,363 INFO L425 ceAbstractionStarter]: For program point fmax_floatFINAL(lines 43 52) no Hoare annotation was computed. [2018-10-27 00:28:46,363 INFO L425 ceAbstractionStarter]: For program point L31(lines 31 40) no Hoare annotation was computed. [2018-10-27 00:28:46,363 INFO L425 ceAbstractionStarter]: For program point __fpclassify_floatFINAL(lines 20 41) no Hoare annotation was computed. [2018-10-27 00:28:46,364 INFO L425 ceAbstractionStarter]: For program point L23-1(lines 23 27) no Hoare annotation was computed. [2018-10-27 00:28:46,364 INFO L421 ceAbstractionStarter]: At program point L23-3(lines 23 27) the Hoare annotation is: (= __fpclassify_float_~x |__fpclassify_float_#in~x|) [2018-10-27 00:28:46,364 INFO L425 ceAbstractionStarter]: For program point L23-4(lines 20 41) no Hoare annotation was computed. [2018-10-27 00:28:46,364 INFO L425 ceAbstractionStarter]: For program point L34(lines 34 40) no Hoare annotation was computed. [2018-10-27 00:28:46,364 INFO L428 ceAbstractionStarter]: At program point __fpclassify_floatENTRY(lines 20 41) the Hoare annotation is: true [2018-10-27 00:28:46,364 INFO L425 ceAbstractionStarter]: For program point __fpclassify_floatEXIT(lines 20 41) no Hoare annotation was computed. [2018-10-27 00:28:46,364 INFO L425 ceAbstractionStarter]: For program point L37(lines 37 40) no Hoare annotation was computed. [2018-10-27 00:28:46,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 12:28:46 BoogieIcfgContainer [2018-10-27 00:28:46,375 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 00:28:46,375 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 00:28:46,376 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 00:28:46,376 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 00:28:46,376 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:28:06" (3/4) ... [2018-10-27 00:28:46,379 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-27 00:28:46,386 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2018-10-27 00:28:46,386 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-27 00:28:46,386 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-27 00:28:46,386 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fmax_float [2018-10-27 00:28:46,386 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2018-10-27 00:28:46,391 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 28 nodes and edges [2018-10-27 00:28:46,391 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2018-10-27 00:28:46,392 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-27 00:28:46,422 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: x == \old(x) [2018-10-27 00:28:46,447 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_cf7911c8-785f-42ca-8ea5-41696155bd13/bin-2019/utaipan/witness.graphml [2018-10-27 00:28:46,447 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 00:28:46,450 INFO L168 Benchmark]: Toolchain (without parser) took 40984.83 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 383.8 MB). Free memory was 946.5 MB in the beginning and 1.1 GB in the end (delta: -118.1 MB). Peak memory consumption was 265.7 MB. Max. memory is 11.5 GB. [2018-10-27 00:28:46,451 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 973.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 00:28:46,451 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.47 ms. Allocated memory is still 1.0 GB. Free memory was 946.5 MB in the beginning and 930.4 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-10-27 00:28:46,451 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.23 ms. Allocated memory is still 1.0 GB. Free memory is still 930.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 00:28:46,451 INFO L168 Benchmark]: Boogie Preprocessor took 26.65 ms. Allocated memory is still 1.0 GB. Free memory is still 930.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 00:28:46,452 INFO L168 Benchmark]: RCFGBuilder took 630.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 174.1 MB). Free memory was 930.4 MB in the beginning and 1.1 GB in the end (delta: -212.7 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2018-10-27 00:28:46,452 INFO L168 Benchmark]: TraceAbstraction took 39945.01 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 209.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 78.5 MB). Peak memory consumption was 288.2 MB. Max. memory is 11.5 GB. [2018-10-27 00:28:46,452 INFO L168 Benchmark]: Witness Printer took 71.35 ms. Allocated memory is still 1.4 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 00:28:46,453 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 973.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 274.47 ms. Allocated memory is still 1.0 GB. Free memory was 946.5 MB in the beginning and 930.4 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 32.23 ms. Allocated memory is still 1.0 GB. Free memory is still 930.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.65 ms. Allocated memory is still 1.0 GB. Free memory is still 930.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 630.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 174.1 MB). Free memory was 930.4 MB in the beginning and 1.1 GB in the end (delta: -212.7 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 39945.01 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 209.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 78.5 MB). Peak memory consumption was 288.2 MB. Max. memory is 11.5 GB. * Witness Printer took 71.35 ms. Allocated memory is still 1.4 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 74]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 80]: 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: 23]: Loop Invariant Derived loop invariant: x == \old(x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 2 error locations. SAFE Result, 39.8s OverallTime, 30 OverallIterations, 6 TraceHistogramMax, 19.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.5s HoareAnnotationTime, HoareTripleCheckerStatistics: 2060 SDtfs, 1239 SDslu, 12907 SDs, 0 SdLazy, 6688 SolverSat, 405 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3500 GetRequests, 3101 SyntacticMatches, 13 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 14.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=19, 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, 348 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 169 PreInvPairs, 193 NumberOfFragments, 163 HoareAnnotationTreeSize, 169 FomulaSimplifications, 24761 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 19 FomulaSimplificationsInter, 71 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 16.4s InterpolantComputationTime, 2386 NumberOfCodeBlocks, 2386 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 3261 ConstructedInterpolants, 49 QuantifiedInterpolants, 645740 SizeOfPredicates, 210 NumberOfNonLiveVariables, 6026 ConjunctsInSsa, 426 ConjunctsInUnsatCore, 56 InterpolantComputations, 23 PerfectInterpolantSequences, 1632/1846 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...