./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 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/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_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/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_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/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_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/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 0.1.23-5842f4b [2018-11-18 15:02:59,510 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 15:02:59,511 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 15:02:59,519 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 15:02:59,520 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 15:02:59,520 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 15:02:59,521 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 15:02:59,522 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 15:02:59,523 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 15:02:59,524 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 15:02:59,525 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 15:02:59,525 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 15:02:59,526 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 15:02:59,526 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 15:02:59,527 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 15:02:59,528 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 15:02:59,529 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 15:02:59,530 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 15:02:59,531 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 15:02:59,533 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 15:02:59,534 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 15:02:59,534 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 15:02:59,536 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 15:02:59,536 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 15:02:59,536 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 15:02:59,537 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 15:02:59,538 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 15:02:59,538 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 15:02:59,539 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 15:02:59,540 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 15:02:59,541 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 15:02:59,541 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 15:02:59,541 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 15:02:59,541 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 15:02:59,542 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 15:02:59,542 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 15:02:59,543 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 15:02:59,553 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 15:02:59,553 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 15:02:59,553 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 15:02:59,554 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 15:02:59,554 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 15:02:59,554 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 15:02:59,554 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 15:02:59,554 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 15:02:59,554 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 15:02:59,554 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 15:02:59,554 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 15:02:59,554 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 15:02:59,554 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 15:02:59,555 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 15:02:59,555 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 15:02:59,555 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 15:02:59,555 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 15:02:59,555 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 15:02:59,556 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 15:02:59,556 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 15:02:59,556 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 15:02:59,556 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 15:02:59,557 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 15:02:59,558 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 15:02:59,558 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 15:02:59,558 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 15:02:59,558 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 15:02:59,558 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 15:02:59,558 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 15:02:59,558 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:02:59,558 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 15:02:59,559 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 15:02:59,559 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 15:02:59,559 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 15:02:59,559 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 15:02:59,559 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 15:02:59,559 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 15:02:59,559 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_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/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 [2018-11-18 15:02:59,583 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 15:02:59,592 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 15:02:59,594 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 15:02:59,595 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 15:02:59,595 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 15:02:59,596 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-11-18 15:02:59,631 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/data/de27f8ddb/f4de7b1631b847e78c215481eff77376/FLAGe1b71bfc4 [2018-11-18 15:03:00,029 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 15:03:00,029 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-11-18 15:03:00,033 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/data/de27f8ddb/f4de7b1631b847e78c215481eff77376/FLAGe1b71bfc4 [2018-11-18 15:03:00,044 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/data/de27f8ddb/f4de7b1631b847e78c215481eff77376 [2018-11-18 15:03:00,046 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 15:03:00,047 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 15:03:00,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 15:03:00,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 15:03:00,050 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 15:03:00,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:03:00" (1/1) ... [2018-11-18 15:03:00,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e791d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:00, skipping insertion in model container [2018-11-18 15:03:00,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:03:00" (1/1) ... [2018-11-18 15:03:00,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 15:03:00,073 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 15:03:00,188 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:03:00,191 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 15:03:00,209 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:03:00,221 INFO L195 MainTranslator]: Completed translation [2018-11-18 15:03:00,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:00 WrapperNode [2018-11-18 15:03:00,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 15:03:00,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 15:03:00,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 15:03:00,222 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 15:03:00,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:00" (1/1) ... [2018-11-18 15:03:00,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:00" (1/1) ... [2018-11-18 15:03:00,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 15:03:00,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 15:03:00,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 15:03:00,245 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 15:03:00,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:00" (1/1) ... [2018-11-18 15:03:00,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:00" (1/1) ... [2018-11-18 15:03:00,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:00" (1/1) ... [2018-11-18 15:03:00,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:00" (1/1) ... [2018-11-18 15:03:00,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:00" (1/1) ... [2018-11-18 15:03:00,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:00" (1/1) ... [2018-11-18 15:03:00,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:00" (1/1) ... [2018-11-18 15:03:00,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 15:03:00,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 15:03:00,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 15:03:00,305 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 15:03:00,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:03:00,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 15:03:00,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 15:03:00,346 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2018-11-18 15:03:00,346 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2018-11-18 15:03:00,346 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-11-18 15:03:00,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-11-18 15:03:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-11-18 15:03:00,347 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-11-18 15:03:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 15:03:00,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 15:03:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2018-11-18 15:03:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 15:03:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 15:03:00,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 15:03:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 15:03:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 15:03:00,583 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 15:03:00,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:03:00 BoogieIcfgContainer [2018-11-18 15:03:00,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 15:03:00,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 15:03:00,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 15:03:00,587 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 15:03:00,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 03:03:00" (1/3) ... [2018-11-18 15:03:00,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef1bced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:03:00, skipping insertion in model container [2018-11-18 15:03:00,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:00" (2/3) ... [2018-11-18 15:03:00,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef1bced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:03:00, skipping insertion in model container [2018-11-18 15:03:00,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:03:00" (3/3) ... [2018-11-18 15:03:00,590 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251_true-unreach-call.c [2018-11-18 15:03:00,598 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 15:03:00,605 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-11-18 15:03:00,619 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-11-18 15:03:00,645 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 15:03:00,646 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 15:03:00,646 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 15:03:00,646 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 15:03:00,646 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 15:03:00,646 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 15:03:00,646 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 15:03:00,646 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 15:03:00,660 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2018-11-18 15:03:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-18 15:03:00,666 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:00,667 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:00,669 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:00,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:00,673 INFO L82 PathProgramCache]: Analyzing trace with hash -732075711, now seen corresponding path program 1 times [2018-11-18 15:03:00,674 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:03:00,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:03:00,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:00,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:03:00,703 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:03:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 15:03:00,774 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:00,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 15:03:00,775 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:03:00,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 15:03:00,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 15:03:00,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 15:03:00,788 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2018-11-18 15:03:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:00,808 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions. [2018-11-18 15:03:00,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 15:03:00,809 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 36 [2018-11-18 15:03:00,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:00,815 INFO L225 Difference]: With dead ends: 109 [2018-11-18 15:03:00,815 INFO L226 Difference]: Without dead ends: 61 [2018-11-18 15:03:00,818 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 15:03:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-18 15:03:00,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-11-18 15:03:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-18 15:03:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-11-18 15:03:00,848 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-11-18 15:03:00,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:00,849 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-11-18 15:03:00,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 15:03:00,849 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-11-18 15:03:00,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 15:03:00,851 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:00,851 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:00,851 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:00,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:00,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1620066532, now seen corresponding path program 1 times [2018-11-18 15:03:00,852 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:03:00,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:03:00,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:00,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:03:00,853 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:03:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 15:03:00,915 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:00,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:03:00,915 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:03:00,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 15:03:00,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 15:03:00,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:00,917 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-11-18 15:03:00,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:00,982 INFO L93 Difference]: Finished difference Result 112 states and 147 transitions. [2018-11-18 15:03:00,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 15:03:00,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-11-18 15:03:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:00,983 INFO L225 Difference]: With dead ends: 112 [2018-11-18 15:03:00,984 INFO L226 Difference]: Without dead ends: 70 [2018-11-18 15:03:00,985 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:03:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-11-18 15:03:00,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2018-11-18 15:03:00,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-18 15:03:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2018-11-18 15:03:00,993 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 37 [2018-11-18 15:03:00,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:00,994 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2018-11-18 15:03:00,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 15:03:00,994 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2018-11-18 15:03:00,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-18 15:03:00,995 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:00,995 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:00,995 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:00,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:00,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1433468384, now seen corresponding path program 1 times [2018-11-18 15:03:00,996 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:03:00,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:03:00,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:00,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:03:00,997 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:03:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-18 15:03:01,039 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:01,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:03:01,040 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:03:01,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 15:03:01,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 15:03:01,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:01,040 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2018-11-18 15:03:01,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:01,058 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2018-11-18 15:03:01,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 15:03:01,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-11-18 15:03:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:01,060 INFO L225 Difference]: With dead ends: 89 [2018-11-18 15:03:01,060 INFO L226 Difference]: Without dead ends: 67 [2018-11-18 15:03:01,061 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:01,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-18 15:03:01,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-11-18 15:03:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-18 15:03:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-11-18 15:03:01,066 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 42 [2018-11-18 15:03:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:01,066 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-11-18 15:03:01,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 15:03:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-11-18 15:03:01,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-18 15:03:01,067 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:01,067 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:01,067 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:01,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:01,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1362097717, now seen corresponding path program 1 times [2018-11-18 15:03:01,067 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:03:01,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:03:01,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:01,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:03:01,068 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:03:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-18 15:03:01,109 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:01,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 15:03:01,110 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:03:01,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 15:03:01,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 15:03:01,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 15:03:01,110 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 3 states. [2018-11-18 15:03:01,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:01,134 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2018-11-18 15:03:01,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 15:03:01,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2018-11-18 15:03:01,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:01,136 INFO L225 Difference]: With dead ends: 70 [2018-11-18 15:03:01,136 INFO L226 Difference]: Without dead ends: 68 [2018-11-18 15:03:01,136 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 15:03:01,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-18 15:03:01,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-11-18 15:03:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-18 15:03:01,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2018-11-18 15:03:01,143 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 45 [2018-11-18 15:03:01,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:01,143 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2018-11-18 15:03:01,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 15:03:01,143 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2018-11-18 15:03:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-18 15:03:01,144 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:01,144 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:01,145 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:01,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:01,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1930782112, now seen corresponding path program 1 times [2018-11-18 15:03:01,145 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:03:01,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:03:01,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:01,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:03:01,146 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:03:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:03:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:03:01,197 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 15:03:01,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 03:03:01 BoogieIcfgContainer [2018-11-18 15:03:01,223 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 15:03:01,223 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 15:03:01,223 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 15:03:01,224 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 15:03:01,224 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:03:00" (3/4) ... [2018-11-18 15:03:01,227 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-18 15:03:01,227 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 15:03:01,228 INFO L168 Benchmark]: Toolchain (without parser) took 1181.34 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 959.1 MB in the beginning and 1.0 GB in the end (delta: -67.0 MB). Peak memory consumption was 52.0 MB. Max. memory is 11.5 GB. [2018-11-18 15:03:01,229 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:03:01,229 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.72 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 945.7 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 11.5 GB. [2018-11-18 15:03:01,229 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.05 ms. Allocated memory is still 1.0 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:03:01,230 INFO L168 Benchmark]: Boogie Preprocessor took 60.59 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -167.3 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. [2018-11-18 15:03:01,230 INFO L168 Benchmark]: RCFGBuilder took 278.40 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2018-11-18 15:03:01,231 INFO L168 Benchmark]: TraceAbstraction took 639.01 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 64.7 MB). Peak memory consumption was 64.7 MB. Max. memory is 11.5 GB. [2018-11-18 15:03:01,231 INFO L168 Benchmark]: Witness Printer took 3.66 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:03:01,234 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 174.72 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 945.7 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.05 ms. Allocated memory is still 1.0 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 60.59 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -167.3 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 278.40 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 639.01 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 64.7 MB). Peak memory consumption was 64.7 MB. Max. memory is 11.5 GB. * Witness Printer took 3.66 ms. Allocated memory is still 1.1 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.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)=4286578692] [L55] RET return x != x; VAL [\old(x)=4286578692, \result=1, x=4286578692] [L67] EXPR isnan_float(x) VAL [isnan_float(x)=1, x=4286578692, y=4286578691] [L67] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, x=4286578692, y=4286578691] [L67] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578691] [L55] RET return x != x; VAL [\old(x)=4286578691, \result=0, x=4286578691] [L67] EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578692, y=4286578691] [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=4286578692, y=4286578691] [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=4286578692, y=4286578691] [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)=4286578692, \old(y)=4286578691] [L44] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=4286578692] [L21] __uint32_t w; VAL [\old(x)=4286578692, x=4286578692] [L24] FCALL ieee_float_shape_type gf_u; [L25] FCALL gf_u.value = (x) [L26] EXPR, FCALL gf_u.word [L26] (w) = gf_u.word [L27] COND FALSE !(0) VAL [\old(x)=4286578692, w=4286578689, x=4286578692] [L29] COND FALSE !(w == 0x00000000 || w == 0x80000000) VAL [\old(x)=4286578692, w=4286578689, x=4286578692] [L31-L32] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) VAL [\old(x)=4286578692, w=4286578689, x=4286578692] [L34-L35] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) VAL [\old(x)=4286578692, w=4286578689, x=4286578692] [L37] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L40] RET return 0; VAL [\old(x)=4286578692, \result=0, w=4286578689, x=4286578692] [L44] EXPR __fpclassify_float(x) VAL [\old(x)=4286578692, \old(y)=4286578691, __fpclassify_float(x)=0, x=4286578692, y=4286578691] [L44] COND TRUE __fpclassify_float(x) == 0 [L45] RET return y; VAL [\old(x)=4286578692, \old(y)=4286578691, \result=4286578691, x=4286578692, y=4286578691] [L70] EXPR fmax_float(x, y) VAL [fmax_float(x, y)=4286578691, x=4286578692, y=4286578691] [L70] float res = fmax_float(x, y); [L73] CALL, EXPR isnan_float(x) VAL [\old(x)=4286578692] [L55] RET return x != x; VAL [\old(x)=4286578692, \result=1, x=4286578692] [L73] EXPR isnan_float(x) VAL [isnan_float(x)=1, res=4286578691, x=4286578692, y=4286578691] [L73] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, res=4286578691, x=4286578692, y=4286578691] [L73] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578691] [L55] RET return x != x; VAL [\old(x)=4286578691, \result=0, x=4286578691] [L73] EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=4286578691, x=4286578692, y=4286578691] [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=4286578691, x=4286578692, y=4286578691] [L73] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L74] __VERIFIER_error() VAL [res=4286578691, x=4286578692, y=4286578691] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 66 locations, 2 error locations. UNSAFE Result, 0.5s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 324 SDtfs, 16 SDslu, 367 SDs, 0 SdLazy, 28 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 210 NumberOfCodeBlocks, 210 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 156 ConstructedInterpolants, 0 QuantifiedInterpolants, 6582 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 24/24 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-5842f4b [2018-11-18 15:03:02,652 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 15:03:02,653 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 15:03:02,661 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 15:03:02,661 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 15:03:02,661 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 15:03:02,662 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 15:03:02,663 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 15:03:02,664 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 15:03:02,665 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 15:03:02,666 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 15:03:02,666 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 15:03:02,666 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 15:03:02,667 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 15:03:02,668 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 15:03:02,669 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 15:03:02,670 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 15:03:02,671 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 15:03:02,672 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 15:03:02,674 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 15:03:02,674 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 15:03:02,675 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 15:03:02,677 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 15:03:02,677 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 15:03:02,677 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 15:03:02,678 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 15:03:02,679 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 15:03:02,679 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 15:03:02,680 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 15:03:02,680 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 15:03:02,681 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 15:03:02,681 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 15:03:02,681 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 15:03:02,681 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 15:03:02,682 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 15:03:02,682 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 15:03:02,683 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-11-18 15:03:02,693 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 15:03:02,693 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 15:03:02,694 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 15:03:02,694 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 15:03:02,694 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 15:03:02,694 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 15:03:02,694 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 15:03:02,694 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 15:03:02,694 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 15:03:02,694 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 15:03:02,695 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 15:03:02,695 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 15:03:02,695 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 15:03:02,695 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 15:03:02,695 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 15:03:02,695 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 15:03:02,695 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 15:03:02,696 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-18 15:03:02,696 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-18 15:03:02,696 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 15:03:02,696 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 15:03:02,697 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 15:03:02,697 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 15:03:02,698 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 15:03:02,698 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 15:03:02,698 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 15:03:02,698 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 15:03:02,698 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:03:02,698 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 15:03:02,698 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 15:03:02,698 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 15:03:02,698 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-11-18 15:03:02,698 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 15:03:02,698 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-18 15:03:02,699 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-18 15:03:02,699 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_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/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 [2018-11-18 15:03:02,728 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 15:03:02,735 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 15:03:02,737 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 15:03:02,738 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 15:03:02,739 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 15:03:02,739 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-11-18 15:03:02,773 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/data/1f07a84e5/39fcc63196d44105becac8c23ab873d2/FLAGcf7e8b60f [2018-11-18 15:03:03,168 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 15:03:03,169 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-11-18 15:03:03,172 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/data/1f07a84e5/39fcc63196d44105becac8c23ab873d2/FLAGcf7e8b60f [2018-11-18 15:03:03,181 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/data/1f07a84e5/39fcc63196d44105becac8c23ab873d2 [2018-11-18 15:03:03,183 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 15:03:03,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 15:03:03,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 15:03:03,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 15:03:03,187 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 15:03:03,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:03:03" (1/1) ... [2018-11-18 15:03:03,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a4379e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:03, skipping insertion in model container [2018-11-18 15:03:03,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:03:03" (1/1) ... [2018-11-18 15:03:03,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 15:03:03,212 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 15:03:03,340 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:03:03,344 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 15:03:03,361 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:03:03,377 INFO L195 MainTranslator]: Completed translation [2018-11-18 15:03:03,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:03 WrapperNode [2018-11-18 15:03:03,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 15:03:03,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 15:03:03,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 15:03:03,378 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 15:03:03,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:03" (1/1) ... [2018-11-18 15:03:03,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:03" (1/1) ... [2018-11-18 15:03:03,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 15:03:03,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 15:03:03,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 15:03:03,396 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 15:03:03,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:03" (1/1) ... [2018-11-18 15:03:03,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:03" (1/1) ... [2018-11-18 15:03:03,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:03" (1/1) ... [2018-11-18 15:03:03,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:03" (1/1) ... [2018-11-18 15:03:03,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:03" (1/1) ... [2018-11-18 15:03:03,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:03" (1/1) ... [2018-11-18 15:03:03,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:03" (1/1) ... [2018-11-18 15:03:03,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 15:03:03,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 15:03:03,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 15:03:03,423 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 15:03:03,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:03:03,498 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 15:03:03,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 15:03:03,498 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2018-11-18 15:03:03,498 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2018-11-18 15:03:03,498 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-11-18 15:03:03,499 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-11-18 15:03:03,499 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-11-18 15:03:03,499 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-11-18 15:03:03,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 15:03:03,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 15:03:03,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 15:03:03,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-11-18 15:03:03,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 15:03:03,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 15:03:03,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2018-11-18 15:03:03,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 15:03:03,688 WARN L317 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-18 15:03:03,708 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 15:03:03,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:03:03 BoogieIcfgContainer [2018-11-18 15:03:03,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 15:03:03,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 15:03:03,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 15:03:03,711 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 15:03:03,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 03:03:03" (1/3) ... [2018-11-18 15:03:03,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262c6f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:03:03, skipping insertion in model container [2018-11-18 15:03:03,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:03:03" (2/3) ... [2018-11-18 15:03:03,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262c6f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:03:03, skipping insertion in model container [2018-11-18 15:03:03,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:03:03" (3/3) ... [2018-11-18 15:03:03,714 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251_true-unreach-call.c [2018-11-18 15:03:03,720 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 15:03:03,724 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-11-18 15:03:03,733 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-11-18 15:03:03,752 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 15:03:03,753 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 15:03:03,753 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 15:03:03,753 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 15:03:03,753 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 15:03:03,753 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 15:03:03,753 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 15:03:03,753 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 15:03:03,753 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 15:03:03,763 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-11-18 15:03:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-18 15:03:03,768 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:03,768 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:03,770 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:03,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:03,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1256839536, now seen corresponding path program 1 times [2018-11-18 15:03:03,775 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:03,776 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:03,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:03,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:03:03,853 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:03,861 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:03,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 15:03:03,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 15:03:03,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 15:03:03,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 15:03:03,872 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-11-18 15:03:03,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:03,892 INFO L93 Difference]: Finished difference Result 105 states and 146 transitions. [2018-11-18 15:03:03,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 15:03:03,894 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 35 [2018-11-18 15:03:03,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:03,901 INFO L225 Difference]: With dead ends: 105 [2018-11-18 15:03:03,901 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 15:03:03,904 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 15:03:03,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 15:03:03,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-11-18 15:03:03,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-18 15:03:03,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2018-11-18 15:03:03,933 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 35 [2018-11-18 15:03:03,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:03,935 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2018-11-18 15:03:03,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 15:03:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2018-11-18 15:03:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-18 15:03:03,937 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:03,937 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:03,937 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:03,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:03,937 INFO L82 PathProgramCache]: Analyzing trace with hash -436144077, now seen corresponding path program 1 times [2018-11-18 15:03:03,938 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:03,938 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:03,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:03,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:03:04,020 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:04,031 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:04,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:03:04,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 15:03:04,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 15:03:04,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:04,033 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2018-11-18 15:03:04,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:04,085 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2018-11-18 15:03:04,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 15:03:04,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-11-18 15:03:04,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:04,087 INFO L225 Difference]: With dead ends: 108 [2018-11-18 15:03:04,087 INFO L226 Difference]: Without dead ends: 68 [2018-11-18 15:03:04,088 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:03:04,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-18 15:03:04,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2018-11-18 15:03:04,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-18 15:03:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-11-18 15:03:04,098 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-11-18 15:03:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:04,098 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-11-18 15:03:04,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 15:03:04,098 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-11-18 15:03:04,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-18 15:03:04,099 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:04,099 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:04,100 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:04,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:04,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1360757035, now seen corresponding path program 1 times [2018-11-18 15:03:04,101 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:04,101 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:04,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:04,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 15:03:04,180 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:04,191 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:04,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:03:04,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 15:03:04,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 15:03:04,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:04,193 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-11-18 15:03:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:04,209 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2018-11-18 15:03:04,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 15:03:04,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-11-18 15:03:04,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:04,212 INFO L225 Difference]: With dead ends: 86 [2018-11-18 15:03:04,212 INFO L226 Difference]: Without dead ends: 64 [2018-11-18 15:03:04,212 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:04,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-18 15:03:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-11-18 15:03:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-18 15:03:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-18 15:03:04,219 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 41 [2018-11-18 15:03:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:04,220 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-18 15:03:04,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 15:03:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-18 15:03:04,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-18 15:03:04,221 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:04,221 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:04,221 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:04,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:04,222 INFO L82 PathProgramCache]: Analyzing trace with hash -2132693573, now seen corresponding path program 1 times [2018-11-18 15:03:04,222 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:04,222 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:04,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:04,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 15:03:04,272 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:04,283 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:04,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:03:04,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 15:03:04,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 15:03:04,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:04,285 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-11-18 15:03:04,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:04,305 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-18 15:03:04,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 15:03:04,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-11-18 15:03:04,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:04,307 INFO L225 Difference]: With dead ends: 89 [2018-11-18 15:03:04,307 INFO L226 Difference]: Without dead ends: 67 [2018-11-18 15:03:04,307 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:04,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-18 15:03:04,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-18 15:03:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-18 15:03:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-18 15:03:04,314 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 42 [2018-11-18 15:03:04,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:04,315 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-18 15:03:04,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 15:03:04,315 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-18 15:03:04,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 15:03:04,316 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:04,316 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:04,316 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:04,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:04,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1320240081, now seen corresponding path program 1 times [2018-11-18 15:03:04,317 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:04,317 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:04,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:04,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 15:03:04,403 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:04,414 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:04,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:03:04,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 15:03:04,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 15:03:04,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:04,415 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-11-18 15:03:04,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:04,429 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-18 15:03:04,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 15:03:04,430 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-11-18 15:03:04,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:04,431 INFO L225 Difference]: With dead ends: 89 [2018-11-18 15:03:04,431 INFO L226 Difference]: Without dead ends: 67 [2018-11-18 15:03:04,431 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:04,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-18 15:03:04,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-18 15:03:04,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-18 15:03:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-18 15:03:04,437 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 43 [2018-11-18 15:03:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:04,437 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-18 15:03:04,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 15:03:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-18 15:03:04,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-18 15:03:04,438 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:04,439 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:04,439 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:04,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:04,439 INFO L82 PathProgramCache]: Analyzing trace with hash -168745665, now seen corresponding path program 1 times [2018-11-18 15:03:04,440 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:04,440 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:04,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:04,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 15:03:04,487 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:04,494 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:04,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:03:04,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 15:03:04,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 15:03:04,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:04,495 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-11-18 15:03:04,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:04,507 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-18 15:03:04,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 15:03:04,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-11-18 15:03:04,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:04,508 INFO L225 Difference]: With dead ends: 89 [2018-11-18 15:03:04,508 INFO L226 Difference]: Without dead ends: 67 [2018-11-18 15:03:04,509 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:04,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-18 15:03:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-18 15:03:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-18 15:03:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-18 15:03:04,512 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 44 [2018-11-18 15:03:04,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:04,513 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-18 15:03:04,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 15:03:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-18 15:03:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-18 15:03:04,513 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:04,514 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:04,514 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:04,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1338806144, now seen corresponding path program 1 times [2018-11-18 15:03:04,514 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:04,514 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:04,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:04,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 15:03:04,687 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 15:03:04,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:03:04,923 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:03:04,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:04,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-18 15:03:04,972 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:04,986 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:03:04,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 14 [2018-11-18 15:03:04,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 15:03:04,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 15:03:04,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-11-18 15:03:04,988 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 14 states. [2018-11-18 15:03:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:05,367 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2018-11-18 15:03:05,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 15:03:05,368 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2018-11-18 15:03:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:05,369 INFO L225 Difference]: With dead ends: 105 [2018-11-18 15:03:05,369 INFO L226 Difference]: Without dead ends: 91 [2018-11-18 15:03:05,370 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-11-18 15:03:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-11-18 15:03:05,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2018-11-18 15:03:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-11-18 15:03:05,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2018-11-18 15:03:05,380 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 44 [2018-11-18 15:03:05,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:05,380 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2018-11-18 15:03:05,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 15:03:05,380 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2018-11-18 15:03:05,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-18 15:03:05,381 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:05,382 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:05,382 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:05,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:05,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1637778421, now seen corresponding path program 1 times [2018-11-18 15:03:05,382 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:05,382 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:05,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:05,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 15:03:05,561 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 15:03:05,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:03:05,880 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:03:05,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:05,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-18 15:03:06,102 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 15:03:06,437 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:03:06,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11, 11] total 29 [2018-11-18 15:03:06,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-18 15:03:06,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-18 15:03:06,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2018-11-18 15:03:06,438 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand 29 states. [2018-11-18 15:03:08,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:08,268 INFO L93 Difference]: Finished difference Result 136 states and 179 transitions. [2018-11-18 15:03:08,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-18 15:03:08,269 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 49 [2018-11-18 15:03:08,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:08,270 INFO L225 Difference]: With dead ends: 136 [2018-11-18 15:03:08,270 INFO L226 Difference]: Without dead ends: 134 [2018-11-18 15:03:08,271 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2018-11-18 15:03:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-18 15:03:08,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2018-11-18 15:03:08,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-18 15:03:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2018-11-18 15:03:08,281 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 49 [2018-11-18 15:03:08,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:08,282 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2018-11-18 15:03:08,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-18 15:03:08,282 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2018-11-18 15:03:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-18 15:03:08,283 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:08,283 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:08,283 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:08,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:08,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2035503454, now seen corresponding path program 1 times [2018-11-18 15:03:08,284 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:08,284 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:08,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:08,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 15:03:08,381 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:08,387 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:08,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-18 15:03:08,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 15:03:08,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 15:03:08,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-18 15:03:08,388 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand 8 states. [2018-11-18 15:03:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:08,711 INFO L93 Difference]: Finished difference Result 158 states and 208 transitions. [2018-11-18 15:03:08,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 15:03:08,711 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2018-11-18 15:03:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:08,712 INFO L225 Difference]: With dead ends: 158 [2018-11-18 15:03:08,712 INFO L226 Difference]: Without dead ends: 105 [2018-11-18 15:03:08,713 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-18 15:03:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-11-18 15:03:08,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2018-11-18 15:03:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-18 15:03:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2018-11-18 15:03:08,721 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 53 [2018-11-18 15:03:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:08,721 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2018-11-18 15:03:08,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 15:03:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2018-11-18 15:03:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-18 15:03:08,722 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:08,722 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:08,723 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:08,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:08,723 INFO L82 PathProgramCache]: Analyzing trace with hash -917330638, now seen corresponding path program 1 times [2018-11-18 15:03:08,723 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:08,723 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:08,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:08,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 15:03:08,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 15:03:09,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:03:09,001 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:03:09,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:09,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-18 15:03:09,053 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:09,068 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:03:09,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 13 [2018-11-18 15:03:09,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 15:03:09,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 15:03:09,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-11-18 15:03:09,069 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand 13 states. [2018-11-18 15:03:09,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:09,372 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2018-11-18 15:03:09,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 15:03:09,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2018-11-18 15:03:09,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:09,373 INFO L225 Difference]: With dead ends: 110 [2018-11-18 15:03:09,373 INFO L226 Difference]: Without dead ends: 106 [2018-11-18 15:03:09,374 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-11-18 15:03:09,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-11-18 15:03:09,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2018-11-18 15:03:09,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-18 15:03:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2018-11-18 15:03:09,382 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 58 [2018-11-18 15:03:09,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:09,383 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2018-11-18 15:03:09,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 15:03:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2018-11-18 15:03:09,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 15:03:09,384 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:09,384 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:09,384 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:09,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:09,384 INFO L82 PathProgramCache]: Analyzing trace with hash 221870355, now seen corresponding path program 1 times [2018-11-18 15:03:09,384 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:09,385 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:09,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:09,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 15:03:09,442 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:09,449 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:09,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:03:09,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 15:03:09,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 15:03:09,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:09,450 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand 4 states. [2018-11-18 15:03:09,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:09,461 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2018-11-18 15:03:09,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 15:03:09,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2018-11-18 15:03:09,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:09,462 INFO L225 Difference]: With dead ends: 119 [2018-11-18 15:03:09,462 INFO L226 Difference]: Without dead ends: 92 [2018-11-18 15:03:09,463 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:09,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-11-18 15:03:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-11-18 15:03:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-18 15:03:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-11-18 15:03:09,469 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 61 [2018-11-18 15:03:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:09,469 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-11-18 15:03:09,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 15:03:09,469 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-11-18 15:03:09,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-18 15:03:09,470 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:09,470 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] [2018-11-18 15:03:09,470 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:09,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:09,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1743084858, now seen corresponding path program 1 times [2018-11-18 15:03:09,470 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:09,471 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:09,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:09,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 15:03:09,517 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:09,524 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:09,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:03:09,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 15:03:09,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 15:03:09,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:09,525 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 4 states. [2018-11-18 15:03:09,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:09,539 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2018-11-18 15:03:09,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 15:03:09,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-11-18 15:03:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:09,540 INFO L225 Difference]: With dead ends: 122 [2018-11-18 15:03:09,540 INFO L226 Difference]: Without dead ends: 95 [2018-11-18 15:03:09,540 INFO L604 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 [2018-11-18 15:03:09,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-18 15:03:09,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2018-11-18 15:03:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-18 15:03:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-11-18 15:03:09,548 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 55 [2018-11-18 15:03:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:09,548 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-11-18 15:03:09,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 15:03:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-11-18 15:03:09,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-18 15:03:09,549 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:09,549 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:09,549 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:09,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:09,549 INFO L82 PathProgramCache]: Analyzing trace with hash -448157192, now seen corresponding path program 1 times [2018-11-18 15:03:09,550 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:09,550 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:09,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:09,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-18 15:03:09,751 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:09,758 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:09,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-11-18 15:03:09,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 15:03:09,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 15:03:09,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-18 15:03:09,759 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 9 states. [2018-11-18 15:03:10,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:10,358 INFO L93 Difference]: Finished difference Result 147 states and 189 transitions. [2018-11-18 15:03:10,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 15:03:10,359 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2018-11-18 15:03:10,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:10,360 INFO L225 Difference]: With dead ends: 147 [2018-11-18 15:03:10,360 INFO L226 Difference]: Without dead ends: 122 [2018-11-18 15:03:10,360 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:03:10,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-11-18 15:03:10,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2018-11-18 15:03:10,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-11-18 15:03:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2018-11-18 15:03:10,368 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 63 [2018-11-18 15:03:10,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:10,368 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2018-11-18 15:03:10,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 15:03:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2018-11-18 15:03:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-18 15:03:10,369 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:10,369 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:10,370 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:10,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:10,370 INFO L82 PathProgramCache]: Analyzing trace with hash 525027593, now seen corresponding path program 1 times [2018-11-18 15:03:10,370 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:10,370 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:10,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:10,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 15:03:10,537 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:10,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:03:10,670 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:03:10,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:10,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 15:03:10,710 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:10,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:03:10,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-18 15:03:10,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 15:03:10,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 15:03:10,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-18 15:03:10,896 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand 8 states. [2018-11-18 15:03:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:11,743 INFO L93 Difference]: Finished difference Result 134 states and 170 transitions. [2018-11-18 15:03:11,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 15:03:11,743 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2018-11-18 15:03:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:11,744 INFO L225 Difference]: With dead ends: 134 [2018-11-18 15:03:11,744 INFO L226 Difference]: Without dead ends: 111 [2018-11-18 15:03:11,745 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-11-18 15:03:11,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-11-18 15:03:11,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2018-11-18 15:03:11,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-18 15:03:11,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 120 transitions. [2018-11-18 15:03:11,753 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 120 transitions. Word has length 56 [2018-11-18 15:03:11,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:11,754 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 120 transitions. [2018-11-18 15:03:11,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 15:03:11,754 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 120 transitions. [2018-11-18 15:03:11,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-18 15:03:11,754 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:11,755 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:11,755 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:11,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:11,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1469117113, now seen corresponding path program 1 times [2018-11-18 15:03:11,755 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:11,755 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:11,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:11,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-18 15:03:11,947 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:11,954 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:11,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-11-18 15:03:11,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 15:03:11,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 15:03:11,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-11-18 15:03:11,955 INFO L87 Difference]: Start difference. First operand 92 states and 120 transitions. Second operand 11 states. [2018-11-18 15:03:12,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:12,648 INFO L93 Difference]: Finished difference Result 121 states and 156 transitions. [2018-11-18 15:03:12,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 15:03:12,649 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-11-18 15:03:12,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:12,649 INFO L225 Difference]: With dead ends: 121 [2018-11-18 15:03:12,649 INFO L226 Difference]: Without dead ends: 119 [2018-11-18 15:03:12,649 INFO L604 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 [2018-11-18 15:03:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-18 15:03:12,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2018-11-18 15:03:12,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-18 15:03:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2018-11-18 15:03:12,657 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 56 [2018-11-18 15:03:12,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:12,657 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2018-11-18 15:03:12,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 15:03:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2018-11-18 15:03:12,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-18 15:03:12,658 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:12,658 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:12,658 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:12,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:12,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1422897632, now seen corresponding path program 1 times [2018-11-18 15:03:12,659 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:12,659 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/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 [2018-11-18 15:03:12,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:12,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 15:03:12,708 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:12,715 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:12,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:03:12,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 15:03:12,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 15:03:12,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:12,716 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 4 states. [2018-11-18 15:03:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:12,728 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2018-11-18 15:03:12,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 15:03:12,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-11-18 15:03:12,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:12,729 INFO L225 Difference]: With dead ends: 127 [2018-11-18 15:03:12,730 INFO L226 Difference]: Without dead ends: 100 [2018-11-18 15:03:12,730 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-11-18 15:03:12,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2018-11-18 15:03:12,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-18 15:03:12,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2018-11-18 15:03:12,736 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 56 [2018-11-18 15:03:12,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:12,736 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2018-11-18 15:03:12,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 15:03:12,736 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2018-11-18 15:03:12,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-18 15:03:12,737 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:12,737 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:12,737 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:12,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:12,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1531309075, now seen corresponding path program 1 times [2018-11-18 15:03:12,738 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:12,738 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 22 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:12,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:12,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-18 15:03:13,167 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:13,458 WARN L180 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2018-11-18 15:03:13,815 WARN L180 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-11-18 15:03:14,182 WARN L180 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2018-11-18 15:03:14,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:03:14,394 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/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 [2018-11-18 15:03:14,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:14,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 15:03:14,576 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:14,716 WARN L180 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2018-11-18 15:03:15,098 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-11-18 15:03:15,245 WARN L180 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2018-11-18 15:03:15,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:03:15,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 17 [2018-11-18 15:03:15,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 15:03:15,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 15:03:15,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-11-18 15:03:15,473 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 17 states. [2018-11-18 15:03:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:16,867 INFO L93 Difference]: Finished difference Result 154 states and 201 transitions. [2018-11-18 15:03:16,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 15:03:16,867 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-11-18 15:03:16,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:16,868 INFO L225 Difference]: With dead ends: 154 [2018-11-18 15:03:16,868 INFO L226 Difference]: Without dead ends: 127 [2018-11-18 15:03:16,868 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2018-11-18 15:03:16,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-18 15:03:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2018-11-18 15:03:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-18 15:03:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2018-11-18 15:03:16,876 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 63 [2018-11-18 15:03:16,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:16,876 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2018-11-18 15:03:16,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 15:03:16,876 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2018-11-18 15:03:16,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-18 15:03:16,877 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:16,877 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] [2018-11-18 15:03:16,877 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:16,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:16,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1082608614, now seen corresponding path program 1 times [2018-11-18 15:03:16,877 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:16,877 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:16,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:16,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 15:03:17,015 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-18 15:03:17,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:03:17,233 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:03:17,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:17,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-18 15:03:17,296 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-18 15:03:17,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 15:03:17,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 12] total 17 [2018-11-18 15:03:17,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 15:03:17,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 15:03:17,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-11-18 15:03:17,448 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 17 states. [2018-11-18 15:03:18,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:18,057 INFO L93 Difference]: Finished difference Result 149 states and 192 transitions. [2018-11-18 15:03:18,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 15:03:18,057 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2018-11-18 15:03:18,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:18,057 INFO L225 Difference]: With dead ends: 149 [2018-11-18 15:03:18,057 INFO L226 Difference]: Without dead ends: 119 [2018-11-18 15:03:18,058 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2018-11-18 15:03:18,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-18 15:03:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2018-11-18 15:03:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-11-18 15:03:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2018-11-18 15:03:18,066 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 64 [2018-11-18 15:03:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:18,066 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2018-11-18 15:03:18,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 15:03:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2018-11-18 15:03:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-18 15:03:18,067 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:18,067 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:18,067 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:18,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:18,067 INFO L82 PathProgramCache]: Analyzing trace with hash -978651351, now seen corresponding path program 1 times [2018-11-18 15:03:18,067 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:18,067 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 26 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:18,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:18,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 15:03:18,305 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 15:03:18,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:03:18,629 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:03:18,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:18,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-18 15:03:18,840 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 15:03:19,216 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:03:19,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [12, 12, 12] total 31 [2018-11-18 15:03:19,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-18 15:03:19,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-18 15:03:19,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2018-11-18 15:03:19,217 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand 31 states. [2018-11-18 15:03:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:21,049 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2018-11-18 15:03:21,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-18 15:03:21,050 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 57 [2018-11-18 15:03:21,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:21,050 INFO L225 Difference]: With dead ends: 174 [2018-11-18 15:03:21,051 INFO L226 Difference]: Without dead ends: 172 [2018-11-18 15:03:21,051 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2018-11-18 15:03:21,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-11-18 15:03:21,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 97. [2018-11-18 15:03:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-18 15:03:21,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2018-11-18 15:03:21,062 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 57 [2018-11-18 15:03:21,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:21,062 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2018-11-18 15:03:21,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-18 15:03:21,062 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2018-11-18 15:03:21,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-18 15:03:21,063 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:21,063 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:21,063 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:21,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:21,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1722325118, now seen corresponding path program 1 times [2018-11-18 15:03:21,064 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:21,064 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 28 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:21,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:21,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 15:03:21,109 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:21,120 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:21,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:03:21,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 15:03:21,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 15:03:21,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:21,121 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand 4 states. [2018-11-18 15:03:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:21,135 INFO L93 Difference]: Finished difference Result 128 states and 162 transitions. [2018-11-18 15:03:21,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 15:03:21,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-11-18 15:03:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:21,136 INFO L225 Difference]: With dead ends: 128 [2018-11-18 15:03:21,136 INFO L226 Difference]: Without dead ends: 99 [2018-11-18 15:03:21,136 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-11-18 15:03:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-11-18 15:03:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-11-18 15:03:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2018-11-18 15:03:21,142 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 57 [2018-11-18 15:03:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:21,142 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2018-11-18 15:03:21,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 15:03:21,142 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2018-11-18 15:03:21,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-18 15:03:21,143 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:21,143 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:21,143 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:21,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:21,143 INFO L82 PathProgramCache]: Analyzing trace with hash -2131149343, now seen corresponding path program 1 times [2018-11-18 15:03:21,144 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:21,144 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 29 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:21,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:21,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 15:03:21,638 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:21,645 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:21,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2018-11-18 15:03:21,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 15:03:21,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 15:03:21,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-11-18 15:03:21,645 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand 15 states. [2018-11-18 15:03:22,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:22,827 INFO L93 Difference]: Finished difference Result 153 states and 199 transitions. [2018-11-18 15:03:22,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 15:03:22,827 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-18 15:03:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:22,827 INFO L225 Difference]: With dead ends: 153 [2018-11-18 15:03:22,828 INFO L226 Difference]: Without dead ends: 126 [2018-11-18 15:03:22,828 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2018-11-18 15:03:22,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-11-18 15:03:22,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 105. [2018-11-18 15:03:22,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-11-18 15:03:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 134 transitions. [2018-11-18 15:03:22,838 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 134 transitions. Word has length 57 [2018-11-18 15:03:22,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:22,838 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 134 transitions. [2018-11-18 15:03:22,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 15:03:22,838 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 134 transitions. [2018-11-18 15:03:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-18 15:03:22,839 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:22,839 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:22,839 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:22,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:22,840 INFO L82 PathProgramCache]: Analyzing trace with hash 296411082, now seen corresponding path program 1 times [2018-11-18 15:03:22,840 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:22,840 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 30 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:22,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:22,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-18 15:03:22,945 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-18 15:03:23,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:03:23,157 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:03:23,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:23,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-18 15:03:23,187 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-18 15:03:23,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 15:03:23,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9] total 13 [2018-11-18 15:03:23,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 15:03:23,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 15:03:23,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-11-18 15:03:23,303 INFO L87 Difference]: Start difference. First operand 105 states and 134 transitions. Second operand 13 states. [2018-11-18 15:03:23,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:23,631 INFO L93 Difference]: Finished difference Result 174 states and 211 transitions. [2018-11-18 15:03:23,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 15:03:23,631 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2018-11-18 15:03:23,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:23,632 INFO L225 Difference]: With dead ends: 174 [2018-11-18 15:03:23,632 INFO L226 Difference]: Without dead ends: 91 [2018-11-18 15:03:23,633 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-11-18 15:03:23,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-11-18 15:03:23,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2018-11-18 15:03:23,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-18 15:03:23,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2018-11-18 15:03:23,637 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 69 [2018-11-18 15:03:23,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:23,637 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2018-11-18 15:03:23,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 15:03:23,637 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2018-11-18 15:03:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 15:03:23,637 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:23,637 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:23,638 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:23,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:23,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1504540697, now seen corresponding path program 1 times [2018-11-18 15:03:23,638 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:23,638 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 32 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:23,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:23,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 15:03:23,734 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:23,969 WARN L180 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-18 15:03:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-18 15:03:24,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:03:24,178 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:03:24,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:24,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 15:03:24,240 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-18 15:03:24,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 15:03:24,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 9] total 17 [2018-11-18 15:03:24,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 15:03:24,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 15:03:24,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-11-18 15:03:24,426 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 17 states. [2018-11-18 15:03:24,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:24,778 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2018-11-18 15:03:24,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 15:03:24,778 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2018-11-18 15:03:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:24,779 INFO L225 Difference]: With dead ends: 92 [2018-11-18 15:03:24,779 INFO L226 Difference]: Without dead ends: 60 [2018-11-18 15:03:24,779 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2018-11-18 15:03:24,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-18 15:03:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2018-11-18 15:03:24,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-18 15:03:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2018-11-18 15:03:24,783 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 61 [2018-11-18 15:03:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:24,784 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2018-11-18 15:03:24,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 15:03:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2018-11-18 15:03:24,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-18 15:03:24,784 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:24,784 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:24,785 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:24,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:24,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1474938307, now seen corresponding path program 1 times [2018-11-18 15:03:24,785 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:24,785 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 34 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:24,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:24,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 15:03:24,997 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:25,008 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:25,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-18 15:03:25,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 15:03:25,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 15:03:25,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:03:25,009 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 12 states. [2018-11-18 15:03:25,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:25,698 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2018-11-18 15:03:25,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 15:03:25,699 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2018-11-18 15:03:25,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:25,699 INFO L225 Difference]: With dead ends: 79 [2018-11-18 15:03:25,699 INFO L226 Difference]: Without dead ends: 58 [2018-11-18 15:03:25,700 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-18 15:03:25,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-11-18 15:03:25,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-11-18 15:03:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-18 15:03:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-11-18 15:03:25,703 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 70 [2018-11-18 15:03:25,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:25,703 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-11-18 15:03:25,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 15:03:25,703 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-11-18 15:03:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-18 15:03:25,704 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:25,704 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:25,704 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:25,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:25,704 INFO L82 PathProgramCache]: Analyzing trace with hash 170055519, now seen corresponding path program 1 times [2018-11-18 15:03:25,704 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:25,704 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 35 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:25,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:25,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 15:03:25,981 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:25,988 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:25,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-18 15:03:25,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 15:03:25,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 15:03:25,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:03:25,989 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 12 states. [2018-11-18 15:03:26,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:26,635 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2018-11-18 15:03:26,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 15:03:26,636 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2018-11-18 15:03:26,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:26,636 INFO L225 Difference]: With dead ends: 81 [2018-11-18 15:03:26,636 INFO L226 Difference]: Without dead ends: 60 [2018-11-18 15:03:26,636 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-18 15:03:26,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-18 15:03:26,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2018-11-18 15:03:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-18 15:03:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-11-18 15:03:26,639 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 71 [2018-11-18 15:03:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:26,639 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-11-18 15:03:26,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 15:03:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-11-18 15:03:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-18 15:03:26,640 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:26,640 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:26,640 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:26,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:26,640 INFO L82 PathProgramCache]: Analyzing trace with hash -684584537, now seen corresponding path program 1 times [2018-11-18 15:03:26,640 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:26,640 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 36 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:26,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:26,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-18 15:03:26,804 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-18 15:03:27,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:03:27,366 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:03:27,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:27,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-18 15:03:27,723 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:03:28,279 WARN L180 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-18 15:03:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-11-18 15:03:28,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 15:03:28,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12, 13] total 34 [2018-11-18 15:03:28,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-18 15:03:28,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-18 15:03:28,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 15:03:28,399 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 34 states. [2018-11-18 15:03:29,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:29,652 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2018-11-18 15:03:29,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 15:03:29,653 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 71 [2018-11-18 15:03:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:29,654 INFO L225 Difference]: With dead ends: 97 [2018-11-18 15:03:29,654 INFO L226 Difference]: Without dead ends: 69 [2018-11-18 15:03:29,654 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 248 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2018-11-18 15:03:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-18 15:03:29,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2018-11-18 15:03:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-18 15:03:29,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2018-11-18 15:03:29,657 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 71 [2018-11-18 15:03:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:29,658 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2018-11-18 15:03:29,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-18 15:03:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2018-11-18 15:03:29,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-18 15:03:29,658 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:29,658 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:29,659 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:29,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:29,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1145801543, now seen corresponding path program 1 times [2018-11-18 15:03:29,659 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:29,659 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 38 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:29,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:29,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 15:03:29,953 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:29,964 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:29,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-18 15:03:29,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 15:03:29,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 15:03:29,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:03:29,965 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 12 states. [2018-11-18 15:03:30,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:30,737 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2018-11-18 15:03:30,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 15:03:30,737 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2018-11-18 15:03:30,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:30,738 INFO L225 Difference]: With dead ends: 80 [2018-11-18 15:03:30,738 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 15:03:30,739 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-18 15:03:30,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 15:03:30,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2018-11-18 15:03:30,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-18 15:03:30,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2018-11-18 15:03:30,742 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 72 [2018-11-18 15:03:30,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:30,742 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2018-11-18 15:03:30,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 15:03:30,742 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2018-11-18 15:03:30,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-18 15:03:30,743 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:30,743 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:30,743 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:30,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:30,743 INFO L82 PathProgramCache]: Analyzing trace with hash -193403293, now seen corresponding path program 1 times [2018-11-18 15:03:30,744 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:30,744 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 39 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:30,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:30,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 15:03:30,936 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:30,943 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:30,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-18 15:03:30,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 15:03:30,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 15:03:30,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:03:30,944 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 12 states. [2018-11-18 15:03:31,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:31,513 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2018-11-18 15:03:31,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 15:03:31,514 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2018-11-18 15:03:31,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:31,514 INFO L225 Difference]: With dead ends: 78 [2018-11-18 15:03:31,514 INFO L226 Difference]: Without dead ends: 57 [2018-11-18 15:03:31,514 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-18 15:03:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-18 15:03:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2018-11-18 15:03:31,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-18 15:03:31,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2018-11-18 15:03:31,517 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 73 [2018-11-18 15:03:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:31,517 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2018-11-18 15:03:31,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 15:03:31,517 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2018-11-18 15:03:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-18 15:03:31,518 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:03:31,518 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:03:31,518 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:03:31,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:03:31,518 INFO L82 PathProgramCache]: Analyzing trace with hash 499698404, now seen corresponding path program 1 times [2018-11-18 15:03:31,518 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 15:03:31,518 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/mathsat Starting monitored process 40 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with mathsat -unsat_core_generation=3 [2018-11-18 15:03:31,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:03:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:03:31,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:03:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-18 15:03:31,584 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 15:03:31,596 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:03:31,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:03:31,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 15:03:31,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 15:03:31,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:31,597 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 4 states. [2018-11-18 15:03:31,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:03:31,603 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-11-18 15:03:31,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 15:03:31,604 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2018-11-18 15:03:31,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:03:31,605 INFO L225 Difference]: With dead ends: 58 [2018-11-18 15:03:31,605 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 15:03:31,605 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:03:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 15:03:31,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 15:03:31,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 15:03:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 15:03:31,606 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2018-11-18 15:03:31,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:03:31,606 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 15:03:31,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 15:03:31,606 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 15:03:31,606 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 15:03:31,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 15:03:31,766 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:03:31,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:03:32,073 INFO L425 ceAbstractionStarter]: For program point isnan_floatFINAL(line 55) no Hoare annotation was computed. [2018-11-18 15:03:32,073 INFO L428 ceAbstractionStarter]: At program point isnan_floatENTRY(line 55) the Hoare annotation is: true [2018-11-18 15:03:32,073 INFO L425 ceAbstractionStarter]: For program point isnan_floatEXIT(line 55) no Hoare annotation was computed. [2018-11-18 15:03:32,073 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-11-18 15:03:32,073 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-11-18 15:03:32,073 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 15:03:32,073 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 15:03:32,073 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 15:03:32,073 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 15:03:32,073 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 15:03:32,074 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|) [2018-11-18 15:03:32,074 INFO L425 ceAbstractionStarter]: For program point L68-4(line 68) no Hoare annotation was computed. [2018-11-18 15:03:32,074 INFO L425 ceAbstractionStarter]: For program point L68-6(line 68) no Hoare annotation was computed. [2018-11-18 15:03:32,074 INFO L425 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 80) no Hoare annotation was computed. [2018-11-18 15:03:32,074 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 57 86) no Hoare annotation was computed. [2018-11-18 15:03:32,074 INFO L421 ceAbstractionStarter]: At program point L73(line 73) the Hoare annotation is: (or (and (= main_~x~0 main_~res~0) (not (fp.eq main_~y~0 main_~y~0))) (and (= main_~y~0 main_~res~0) (not (fp.eq main_~x~0 main_~x~0)))) [2018-11-18 15:03:32,074 INFO L425 ceAbstractionStarter]: For program point L73-1(line 73) no Hoare annotation was computed. [2018-11-18 15:03:32,074 INFO L425 ceAbstractionStarter]: For program point L73-2(line 73) no Hoare annotation was computed. [2018-11-18 15:03:32,074 INFO L421 ceAbstractionStarter]: At program point L73-3(line 73) the Hoare annotation is: (and |main_#t~short17| (= main_~y~0 main_~res~0) (= (_ bv1 32) |main_#t~ret15|) (not (fp.eq main_~x~0 main_~x~0))) [2018-11-18 15:03:32,074 INFO L425 ceAbstractionStarter]: For program point L73-4(line 73) no Hoare annotation was computed. [2018-11-18 15:03:32,074 INFO L425 ceAbstractionStarter]: For program point L73-6(lines 73 76) no Hoare annotation was computed. [2018-11-18 15:03:32,074 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 74) no Hoare annotation was computed. [2018-11-18 15:03:32,074 INFO L425 ceAbstractionStarter]: For program point L74(line 74) no Hoare annotation was computed. [2018-11-18 15:03:32,074 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)))) [2018-11-18 15:03:32,074 INFO L425 ceAbstractionStarter]: For program point L70-1(line 70) no Hoare annotation was computed. [2018-11-18 15:03:32,074 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))) [2018-11-18 15:03:32,074 INFO L425 ceAbstractionStarter]: For program point L79-1(line 79) no Hoare annotation was computed. [2018-11-18 15:03:32,074 INFO L425 ceAbstractionStarter]: For program point L79-2(line 79) no Hoare annotation was computed. [2018-11-18 15:03:32,074 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 57 86) no Hoare annotation was computed. [2018-11-18 15:03:32,074 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))) [2018-11-18 15:03:32,075 INFO L425 ceAbstractionStarter]: For program point L79-4(line 79) no Hoare annotation was computed. [2018-11-18 15:03:32,075 INFO L425 ceAbstractionStarter]: For program point L79-6(lines 79 82) no Hoare annotation was computed. [2018-11-18 15:03:32,075 INFO L428 ceAbstractionStarter]: At program point L67(line 67) the Hoare annotation is: true [2018-11-18 15:03:32,075 INFO L425 ceAbstractionStarter]: For program point L67-1(line 67) no Hoare annotation was computed. [2018-11-18 15:03:32,075 INFO L425 ceAbstractionStarter]: For program point L67-2(line 67) no Hoare annotation was computed. [2018-11-18 15:03:32,075 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))) [2018-11-18 15:03:32,075 INFO L425 ceAbstractionStarter]: For program point L67-4(line 67) no Hoare annotation was computed. [2018-11-18 15:03:32,075 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 57 86) the Hoare annotation is: true [2018-11-18 15:03:32,075 INFO L425 ceAbstractionStarter]: For program point L67-6(line 67) no Hoare annotation was computed. [2018-11-18 15:03:32,075 INFO L425 ceAbstractionStarter]: For program point L67-7(lines 67 68) no Hoare annotation was computed. [2018-11-18 15:03:32,075 INFO L425 ceAbstractionStarter]: For program point L67-9(lines 67 83) no Hoare annotation was computed. [2018-11-18 15:03:32,075 INFO L425 ceAbstractionStarter]: For program point L67-11(lines 67 83) no Hoare annotation was computed. [2018-11-18 15:03:32,075 INFO L425 ceAbstractionStarter]: For program point L80(line 80) no Hoare annotation was computed. [2018-11-18 15:03:32,075 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))))) [2018-11-18 15:03:32,076 INFO L425 ceAbstractionStarter]: For program point L68-1(line 68) no Hoare annotation was computed. [2018-11-18 15:03:32,076 INFO L425 ceAbstractionStarter]: For program point L68-2(line 68) no Hoare annotation was computed. [2018-11-18 15:03:32,076 INFO L425 ceAbstractionStarter]: For program point fmax_floatEXIT(lines 43 52) no Hoare annotation was computed. [2018-11-18 15:03:32,076 INFO L428 ceAbstractionStarter]: At program point fmax_floatENTRY(lines 43 52) the Hoare annotation is: true [2018-11-18 15:03:32,076 INFO L425 ceAbstractionStarter]: For program point L51(line 51) no Hoare annotation was computed. [2018-11-18 15:03:32,076 INFO L425 ceAbstractionStarter]: For program point L51-2(line 51) no Hoare annotation was computed. [2018-11-18 15:03:32,076 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)) [2018-11-18 15:03:32,076 INFO L425 ceAbstractionStarter]: For program point L48-1(lines 48 50) no Hoare annotation was computed. [2018-11-18 15:03:32,076 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)) [2018-11-18 15:03:32,077 INFO L425 ceAbstractionStarter]: For program point L44-1(lines 44 46) no Hoare annotation was computed. [2018-11-18 15:03:32,077 INFO L425 ceAbstractionStarter]: For program point fmax_floatFINAL(lines 43 52) no Hoare annotation was computed. [2018-11-18 15:03:32,077 INFO L425 ceAbstractionStarter]: For program point L31(lines 31 40) no Hoare annotation was computed. [2018-11-18 15:03:32,077 INFO L425 ceAbstractionStarter]: For program point __fpclassify_floatFINAL(lines 20 41) no Hoare annotation was computed. [2018-11-18 15:03:32,077 INFO L425 ceAbstractionStarter]: For program point L23-1(lines 23 27) no Hoare annotation was computed. [2018-11-18 15:03:32,077 INFO L421 ceAbstractionStarter]: At program point L23-3(lines 23 27) the Hoare annotation is: (= __fpclassify_float_~x |__fpclassify_float_#in~x|) [2018-11-18 15:03:32,077 INFO L425 ceAbstractionStarter]: For program point L23-4(lines 20 41) no Hoare annotation was computed. [2018-11-18 15:03:32,077 INFO L425 ceAbstractionStarter]: For program point L34(lines 34 40) no Hoare annotation was computed. [2018-11-18 15:03:32,077 INFO L428 ceAbstractionStarter]: At program point __fpclassify_floatENTRY(lines 20 41) the Hoare annotation is: true [2018-11-18 15:03:32,077 INFO L425 ceAbstractionStarter]: For program point __fpclassify_floatEXIT(lines 20 41) no Hoare annotation was computed. [2018-11-18 15:03:32,077 INFO L425 ceAbstractionStarter]: For program point L37(lines 37 40) no Hoare annotation was computed. [2018-11-18 15:03:32,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 03:03:32 BoogieIcfgContainer [2018-11-18 15:03:32,086 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 15:03:32,086 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 15:03:32,086 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 15:03:32,086 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 15:03:32,087 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:03:03" (3/4) ... [2018-11-18 15:03:32,089 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 15:03:32,093 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2018-11-18 15:03:32,093 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 15:03:32,093 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 15:03:32,093 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fmax_float [2018-11-18 15:03:32,093 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2018-11-18 15:03:32,097 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2018-11-18 15:03:32,097 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-11-18 15:03:32,098 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 15:03:32,117 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: x == \old(x) [2018-11-18 15:03:32,135 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d78fb717-9bee-41ad-aa3c-3b8a57c7554c/bin-2019/utaipan/witness.graphml [2018-11-18 15:03:32,135 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 15:03:32,135 INFO L168 Benchmark]: Toolchain (without parser) took 28952.00 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 372.2 MB). Free memory was 949.7 MB in the beginning and 806.5 MB in the end (delta: 143.3 MB). Peak memory consumption was 515.5 MB. Max. memory is 11.5 GB. [2018-11-18 15:03:32,136 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:03:32,136 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.69 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 933.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-18 15:03:32,136 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.36 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:03:32,136 INFO L168 Benchmark]: Boogie Preprocessor took 26.76 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:03:32,136 INFO L168 Benchmark]: RCFGBuilder took 285.67 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -149.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. [2018-11-18 15:03:32,137 INFO L168 Benchmark]: TraceAbstraction took 28376.48 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 257.4 MB). Free memory was 1.1 GB in the beginning and 817.7 MB in the end (delta: 265.6 MB). Peak memory consumption was 523.0 MB. Max. memory is 11.5 GB. [2018-11-18 15:03:32,137 INFO L168 Benchmark]: Witness Printer took 48.86 ms. Allocated memory is still 1.4 GB. Free memory was 817.7 MB in the beginning and 806.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 11.5 GB. [2018-11-18 15:03:32,138 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 192.69 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 933.6 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 18.36 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.76 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 285.67 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -149.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 28376.48 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 257.4 MB). Free memory was 1.1 GB in the beginning and 817.7 MB in the end (delta: 265.6 MB). Peak memory consumption was 523.0 MB. Max. memory is 11.5 GB. * Witness Printer took 48.86 ms. Allocated memory is still 1.4 GB. Free memory was 817.7 MB in the beginning and 806.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. 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, 28.3s OverallTime, 29 OverallIterations, 6 TraceHistogramMax, 14.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.4s HoareAnnotationTime, HoareTripleCheckerStatistics: 2002 SDtfs, 1256 SDslu, 12561 SDs, 0 SdLazy, 6758 SolverSat, 433 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3273 GetRequests, 2872 SyntacticMatches, 10 SemanticMatches, 391 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 10.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=17, 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: 0.1s AutomataMinimizationTime, 29 MinimizatonAttempts, 345 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 169 PreInvPairs, 193 NumberOfFragments, 154 HoareAnnotationTreeSize, 169 FomulaSimplifications, 31128 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 19 FomulaSimplificationsInter, 74 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 10.8s InterpolantComputationTime, 2242 NumberOfCodeBlocks, 2242 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 3033 ConstructedInterpolants, 35 QuantifiedInterpolants, 557484 SizeOfPredicates, 188 NumberOfNonLiveVariables, 4706 ConjunctsInSsa, 401 ConjunctsInUnsatCore, 53 InterpolantComputations, 23 PerfectInterpolantSequences, 1474/1662 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...