./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.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 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 0.1.23-635dfa2 [2018-12-09 10:03:17,624 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 10:03:17,625 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 10:03:17,631 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 10:03:17,631 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 10:03:17,631 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 10:03:17,632 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 10:03:17,633 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 10:03:17,634 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 10:03:17,634 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 10:03:17,634 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 10:03:17,635 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 10:03:17,635 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 10:03:17,636 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 10:03:17,636 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 10:03:17,636 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 10:03:17,637 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 10:03:17,638 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 10:03:17,639 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 10:03:17,639 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 10:03:17,640 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 10:03:17,640 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 10:03:17,641 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 10:03:17,642 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 10:03:17,642 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 10:03:17,642 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 10:03:17,643 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 10:03:17,643 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 10:03:17,643 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 10:03:17,644 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 10:03:17,644 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 10:03:17,644 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 10:03:17,644 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 10:03:17,645 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 10:03:17,645 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 10:03:17,645 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 10:03:17,646 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 10:03:17,653 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 10:03:17,653 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 10:03:17,653 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 10:03:17,653 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 10:03:17,653 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 10:03:17,654 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 10:03:17,654 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 10:03:17,654 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 10:03:17,654 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 10:03:17,654 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 10:03:17,654 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 10:03:17,654 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 10:03:17,654 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 10:03:17,654 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 10:03:17,655 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 10:03:17,655 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 10:03:17,655 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 10:03:17,655 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 10:03:17,655 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 10:03:17,655 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 10:03:17,655 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 10:03:17,655 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 10:03:17,655 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 10:03:17,655 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 10:03:17,655 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 10:03:17,655 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 10:03:17,656 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 10:03:17,656 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 10:03:17,656 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 10:03:17,656 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 10:03:17,656 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 10:03:17,656 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 10:03:17,656 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 10:03:17,656 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 10:03:17,656 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 10:03:17,656 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 10:03:17,656 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_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:17,674 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 10:03:17,681 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 10:03:17,683 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 10:03:17,684 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 10:03:17,684 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 10:03:17,685 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-12-09 10:03:17,725 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/data/12eec31b0/4849bf5a948044438d3d34e3d2ac56f1/FLAG9ae9b79b7 [2018-12-09 10:03:18,134 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 10:03:18,134 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-12-09 10:03:18,138 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/data/12eec31b0/4849bf5a948044438d3d34e3d2ac56f1/FLAG9ae9b79b7 [2018-12-09 10:03:18,146 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/data/12eec31b0/4849bf5a948044438d3d34e3d2ac56f1 [2018-12-09 10:03:18,147 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 10:03:18,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 10:03:18,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 10:03:18,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 10:03:18,151 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 10:03:18,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:03:18" (1/1) ... [2018-12-09 10:03:18,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f41b83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:18, skipping insertion in model container [2018-12-09 10:03:18,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:03:18" (1/1) ... [2018-12-09 10:03:18,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 10:03:18,169 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 10:03:18,266 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 10:03:18,267 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 10:03:18,282 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 10:03:18,294 INFO L195 MainTranslator]: Completed translation [2018-12-09 10:03:18,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:18 WrapperNode [2018-12-09 10:03:18,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 10:03:18,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 10:03:18,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 10:03:18,295 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 10:03:18,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:18" (1/1) ... [2018-12-09 10:03:18,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:18" (1/1) ... [2018-12-09 10:03:18,310 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 10:03:18,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 10:03:18,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 10:03:18,311 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 10:03:18,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:18" (1/1) ... [2018-12-09 10:03:18,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:18" (1/1) ... [2018-12-09 10:03:18,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:18" (1/1) ... [2018-12-09 10:03:18,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:18" (1/1) ... [2018-12-09 10:03:18,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:18" (1/1) ... [2018-12-09 10:03:18,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:18" (1/1) ... [2018-12-09 10:03:18,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:18" (1/1) ... [2018-12-09 10:03:18,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 10:03:18,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 10:03:18,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 10:03:18,358 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 10:03:18,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 10:03:18,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 10:03:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2018-12-09 10:03:18,389 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2018-12-09 10:03:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-12-09 10:03:18,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-12-09 10:03:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-12-09 10:03:18,390 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-12-09 10:03:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 10:03:18,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 10:03:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2018-12-09 10:03:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 10:03:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 10:03:18,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 10:03:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 10:03:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 10:03:18,579 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 10:03:18,579 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-09 10:03:18,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:03:18 BoogieIcfgContainer [2018-12-09 10:03:18,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 10:03:18,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 10:03:18,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 10:03:18,585 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 10:03:18,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:03:18" (1/3) ... [2018-12-09 10:03:18,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46478758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:03:18, skipping insertion in model container [2018-12-09 10:03:18,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:18" (2/3) ... [2018-12-09 10:03:18,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46478758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:03:18, skipping insertion in model container [2018-12-09 10:03:18,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:03:18" (3/3) ... [2018-12-09 10:03:18,587 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251_true-unreach-call.c [2018-12-09 10:03:18,595 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 10:03:18,601 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-12-09 10:03:18,609 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-12-09 10:03:18,628 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 10:03:18,628 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 10:03:18,628 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 10:03:18,628 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 10:03:18,628 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 10:03:18,628 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 10:03:18,628 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 10:03:18,628 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 10:03:18,640 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2018-12-09 10:03:18,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-09 10:03:18,645 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:18,646 INFO L402 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] [2018-12-09 10:03:18,648 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:18,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:18,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2074573857, now seen corresponding path program 1 times [2018-12-09 10:03:18,654 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 10:03:18,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:03:18,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:18,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:03:18,682 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 10:03:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 10:03:18,746 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:18,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 10:03:18,746 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 10:03:18,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 10:03:18,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 10:03:18,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 10:03:18,758 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2018-12-09 10:03:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:18,774 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions. [2018-12-09 10:03:18,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 10:03:18,775 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 36 [2018-12-09 10:03:18,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:18,781 INFO L225 Difference]: With dead ends: 109 [2018-12-09 10:03:18,781 INFO L226 Difference]: Without dead ends: 61 [2018-12-09 10:03:18,783 INFO L631 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 [2018-12-09 10:03:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-09 10:03:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-12-09 10:03:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-09 10:03:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-12-09 10:03:18,810 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-12-09 10:03:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:18,811 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-12-09 10:03:18,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 10:03:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-12-09 10:03:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-09 10:03:18,812 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:18,813 INFO L402 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] [2018-12-09 10:03:18,813 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:18,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:18,813 INFO L82 PathProgramCache]: Analyzing trace with hash -479509601, now seen corresponding path program 1 times [2018-12-09 10:03:18,813 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 10:03:18,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:03:18,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:18,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:03:18,814 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 10:03:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 10:03:18,864 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:18,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 10:03:18,864 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 10:03:18,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 10:03:18,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 10:03:18,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 10:03:18,865 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-12-09 10:03:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:18,902 INFO L93 Difference]: Finished difference Result 112 states and 147 transitions. [2018-12-09 10:03:18,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 10:03:18,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-12-09 10:03:18,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:18,904 INFO L225 Difference]: With dead ends: 112 [2018-12-09 10:03:18,904 INFO L226 Difference]: Without dead ends: 70 [2018-12-09 10:03:18,905 INFO L631 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 [2018-12-09 10:03:18,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-09 10:03:18,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2018-12-09 10:03:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-09 10:03:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2018-12-09 10:03:18,914 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 37 [2018-12-09 10:03:18,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:18,915 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2018-12-09 10:03:18,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 10:03:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2018-12-09 10:03:18,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-09 10:03:18,916 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:18,916 INFO L402 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] [2018-12-09 10:03:18,916 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:18,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:18,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1695952933, now seen corresponding path program 1 times [2018-12-09 10:03:18,917 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 10:03:18,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:03:18,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:18,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:03:18,918 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 10:03:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-09 10:03:18,962 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:18,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 10:03:18,962 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 10:03:18,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 10:03:18,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 10:03:18,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 10:03:18,963 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2018-12-09 10:03:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:18,983 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2018-12-09 10:03:18,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 10:03:18,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-12-09 10:03:18,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:18,985 INFO L225 Difference]: With dead ends: 89 [2018-12-09 10:03:18,985 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 10:03:18,985 INFO L631 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 [2018-12-09 10:03:18,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 10:03:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-12-09 10:03:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-09 10:03:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-12-09 10:03:18,990 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 42 [2018-12-09 10:03:18,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:18,990 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-12-09 10:03:18,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 10:03:18,990 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-12-09 10:03:18,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-09 10:03:18,991 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:18,991 INFO L402 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] [2018-12-09 10:03:18,991 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:18,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:18,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1516736276, now seen corresponding path program 1 times [2018-12-09 10:03:18,991 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 10:03:18,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:03:18,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:18,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:03:18,992 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 10:03:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-09 10:03:19,028 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:19,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 10:03:19,028 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 10:03:19,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 10:03:19,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 10:03:19,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 10:03:19,028 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 4 states. [2018-12-09 10:03:19,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:19,049 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2018-12-09 10:03:19,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 10:03:19,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2018-12-09 10:03:19,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:19,050 INFO L225 Difference]: With dead ends: 93 [2018-12-09 10:03:19,050 INFO L226 Difference]: Without dead ends: 71 [2018-12-09 10:03:19,051 INFO L631 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 [2018-12-09 10:03:19,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-09 10:03:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-12-09 10:03:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-09 10:03:19,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-12-09 10:03:19,055 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 45 [2018-12-09 10:03:19,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:19,055 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-12-09 10:03:19,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 10:03:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-12-09 10:03:19,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-09 10:03:19,056 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:19,056 INFO L402 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] [2018-12-09 10:03:19,056 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:19,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:19,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1006202099, now seen corresponding path program 1 times [2018-12-09 10:03:19,056 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 10:03:19,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:03:19,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:19,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:03:19,057 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 10:03:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-09 10:03:19,076 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:19,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 10:03:19,076 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 10:03:19,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 10:03:19,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 10:03:19,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 10:03:19,077 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 3 states. [2018-12-09 10:03:19,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:19,088 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2018-12-09 10:03:19,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 10:03:19,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2018-12-09 10:03:19,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:19,089 INFO L225 Difference]: With dead ends: 70 [2018-12-09 10:03:19,089 INFO L226 Difference]: Without dead ends: 68 [2018-12-09 10:03:19,089 INFO L631 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 [2018-12-09 10:03:19,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-09 10:03:19,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-09 10:03:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-09 10:03:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2018-12-09 10:03:19,094 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 45 [2018-12-09 10:03:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:19,094 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2018-12-09 10:03:19,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 10:03:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2018-12-09 10:03:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-12-09 10:03:19,095 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:19,095 INFO L402 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] [2018-12-09 10:03:19,095 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:19,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:19,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1226294786, now seen corresponding path program 1 times [2018-12-09 10:03:19,095 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 10:03:19,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:03:19,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:19,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 10:03:19,096 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 10:03:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:03:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 10:03:19,133 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 10:03:19,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:03:19 BoogieIcfgContainer [2018-12-09 10:03:19,153 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 10:03:19,153 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 10:03:19,153 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 10:03:19,153 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 10:03:19,153 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:03:18" (3/4) ... [2018-12-09 10:03:19,155 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 10:03:19,156 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 10:03:19,156 INFO L168 Benchmark]: Toolchain (without parser) took 1008.54 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 952.4 MB in the beginning and 997.5 MB in the end (delta: -45.1 MB). Peak memory consumption was 66.5 MB. Max. memory is 11.5 GB. [2018-12-09 10:03:19,157 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 10:03:19,157 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.02 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 10:03:19,157 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.53 ms. Allocated memory is still 1.0 GB. Free memory was 941.6 MB in the beginning and 936.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-09 10:03:19,158 INFO L168 Benchmark]: Boogie Preprocessor took 47.03 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 936.3 MB in the beginning and 1.1 GB in the end (delta: -170.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. [2018-12-09 10:03:19,158 INFO L168 Benchmark]: RCFGBuilder took 223.42 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2018-12-09 10:03:19,158 INFO L168 Benchmark]: TraceAbstraction took 570.99 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 997.5 MB in the end (delta: 89.7 MB). Peak memory consumption was 89.7 MB. Max. memory is 11.5 GB. [2018-12-09 10:03:19,159 INFO L168 Benchmark]: Witness Printer took 2.66 ms. Allocated memory is still 1.1 GB. Free memory is still 997.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 10:03:19,160 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 146.02 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 15.53 ms. Allocated memory is still 1.0 GB. Free memory was 941.6 MB in the beginning and 936.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 47.03 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 936.3 MB in the beginning and 1.1 GB in the end (delta: -170.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. * RCFGBuilder took 223.42 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 570.99 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 997.5 MB in the end (delta: 89.7 MB). Peak memory consumption was 89.7 MB. Max. memory is 11.5 GB. * Witness Printer took 2.66 ms. Allocated memory is still 1.1 GB. Free memory is still 997.5 MB. 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)=2139095044] [L55] return x != x; VAL [\old(x)=2139095044, \result=1, x=2139095044] [L67] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, x=2139095044, y=2139095043] [L67] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, x=2139095044, y=2139095043] [L67] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L55] return x != x; VAL [\old(x)=2139095043, \result=0, x=2139095043] [L67] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095044, y=2139095043] [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=2139095044, y=2139095043] [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=2139095044, y=2139095043] [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)=2139095044, \old(y)=2139095043] [L44] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=2139095044] [L21] __uint32_t w; VAL [\old(x)=2139095044, x=2139095044] [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND FALSE !(w == 0x00000000 || w == 0x80000000) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L31-L32] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L34-L35] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L37] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L40] return 0; VAL [\old(x)=2139095044, \result=0, w=2139095041, x=2139095044] [L44] RET, EXPR __fpclassify_float(x) VAL [\old(x)=2139095044, \old(y)=2139095043, __fpclassify_float(x)=0, x=2139095044, y=2139095043] [L44] COND TRUE __fpclassify_float(x) == 0 [L45] return y; VAL [\old(x)=2139095044, \old(y)=2139095043, \result=2139095043, x=2139095044, y=2139095043] [L70] RET, EXPR fmax_float(x, y) VAL [fmax_float(x, y)=2139095043, x=2139095044, y=2139095043] [L70] float res = fmax_float(x, y); [L73] CALL, EXPR isnan_float(x) VAL [\old(x)=2139095044] [L55] return x != x; VAL [\old(x)=2139095044, \result=1, x=2139095044] [L73] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, res=2139095043, x=2139095044, y=2139095043] [L73] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, res=2139095043, x=2139095044, y=2139095043] [L73] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L55] return x != x; VAL [\old(x)=2139095043, \result=0, x=2139095043] [L73] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=2139095043, x=2139095044, y=2139095043] [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=2139095043, x=2139095044, y=2139095043] [L73] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L74] __VERIFIER_error() VAL [res=2139095043, x=2139095044, y=2139095043] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 66 locations, 2 error locations. UNSAFE Result, 0.5s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 407 SDtfs, 16 SDslu, 523 SDs, 0 SdLazy, 40 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=5, 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, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 255 NumberOfCodeBlocks, 255 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 200 ConstructedInterpolants, 0 QuantifiedInterpolants, 8870 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 33/33 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 0.1.23-635dfa2 [2018-12-09 10:03:20,454 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 10:03:20,454 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 10:03:20,461 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 10:03:20,461 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 10:03:20,461 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 10:03:20,462 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 10:03:20,463 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 10:03:20,464 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 10:03:20,464 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 10:03:20,464 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 10:03:20,465 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 10:03:20,465 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 10:03:20,465 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 10:03:20,466 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 10:03:20,466 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 10:03:20,467 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 10:03:20,468 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 10:03:20,468 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 10:03:20,469 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 10:03:20,470 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 10:03:20,470 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 10:03:20,471 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 10:03:20,472 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 10:03:20,472 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 10:03:20,472 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 10:03:20,473 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 10:03:20,473 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 10:03:20,474 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 10:03:20,474 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 10:03:20,474 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 10:03:20,475 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 10:03:20,475 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 10:03:20,475 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 10:03:20,475 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 10:03:20,476 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 10:03:20,476 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-12-09 10:03:20,483 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 10:03:20,484 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 10:03:20,484 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 10:03:20,484 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 10:03:20,484 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 10:03:20,484 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 10:03:20,484 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 10:03:20,484 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 10:03:20,485 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 10:03:20,485 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 10:03:20,485 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 10:03:20,485 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 10:03:20,485 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 10:03:20,485 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 10:03:20,485 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 10:03:20,485 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 10:03:20,485 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 10:03:20,485 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-09 10:03:20,486 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-09 10:03:20,486 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 10:03:20,486 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 10:03:20,486 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 10:03:20,486 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 10:03:20,486 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 10:03:20,486 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 10:03:20,486 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 10:03:20,486 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 10:03:20,486 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 10:03:20,486 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 10:03:20,486 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 10:03:20,487 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 10:03:20,487 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-09 10:03:20,487 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 10:03:20,487 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-09 10:03:20,487 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-09 10:03:20,487 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:20,505 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 10:03:20,515 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 10:03:20,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 10:03:20,519 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 10:03:20,519 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 10:03:20,520 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-12-09 10:03:20,561 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/data/56bad879b/219600ab394b46e8b126629b91ce4b54/FLAG5ceb83262 [2018-12-09 10:03:20,968 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 10:03:20,969 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-12-09 10:03:20,973 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/data/56bad879b/219600ab394b46e8b126629b91ce4b54/FLAG5ceb83262 [2018-12-09 10:03:20,981 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/data/56bad879b/219600ab394b46e8b126629b91ce4b54 [2018-12-09 10:03:20,983 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 10:03:20,983 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 10:03:20,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 10:03:20,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 10:03:20,986 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 10:03:20,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:03:20" (1/1) ... [2018-12-09 10:03:20,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c19bd0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:20, skipping insertion in model container [2018-12-09 10:03:20,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:03:20" (1/1) ... [2018-12-09 10:03:20,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 10:03:21,003 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 10:03:21,097 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 10:03:21,100 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 10:03:21,115 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 10:03:21,129 INFO L195 MainTranslator]: Completed translation [2018-12-09 10:03:21,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:21 WrapperNode [2018-12-09 10:03:21,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 10:03:21,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 10:03:21,130 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 10:03:21,131 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 10:03:21,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:21" (1/1) ... [2018-12-09 10:03:21,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:21" (1/1) ... [2018-12-09 10:03:21,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 10:03:21,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 10:03:21,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 10:03:21,147 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 10:03:21,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:21" (1/1) ... [2018-12-09 10:03:21,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:21" (1/1) ... [2018-12-09 10:03:21,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:21" (1/1) ... [2018-12-09 10:03:21,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:21" (1/1) ... [2018-12-09 10:03:21,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:21" (1/1) ... [2018-12-09 10:03:21,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:21" (1/1) ... [2018-12-09 10:03:21,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:21" (1/1) ... [2018-12-09 10:03:21,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 10:03:21,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 10:03:21,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 10:03:21,168 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 10:03:21,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 10:03:21,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 10:03:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2018-12-09 10:03:21,232 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2018-12-09 10:03:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-12-09 10:03:21,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-12-09 10:03:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-12-09 10:03:21,232 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-12-09 10:03:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 10:03:21,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 10:03:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 10:03:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-12-09 10:03:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 10:03:21,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 10:03:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2018-12-09 10:03:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 10:03:21,389 WARN L317 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 10:03:21,410 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 10:03:21,411 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-09 10:03:21,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:03:21 BoogieIcfgContainer [2018-12-09 10:03:21,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 10:03:21,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 10:03:21,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 10:03:21,413 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 10:03:21,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:03:20" (1/3) ... [2018-12-09 10:03:21,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21307e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:03:21, skipping insertion in model container [2018-12-09 10:03:21,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:03:21" (2/3) ... [2018-12-09 10:03:21,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21307e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:03:21, skipping insertion in model container [2018-12-09 10:03:21,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:03:21" (3/3) ... [2018-12-09 10:03:21,415 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251_true-unreach-call.c [2018-12-09 10:03:21,421 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 10:03:21,425 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-12-09 10:03:21,434 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-12-09 10:03:21,450 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 10:03:21,451 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 10:03:21,451 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 10:03:21,451 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 10:03:21,451 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 10:03:21,451 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 10:03:21,451 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 10:03:21,451 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 10:03:21,451 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 10:03:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-12-09 10:03:21,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-09 10:03:21,465 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:21,465 INFO L402 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] [2018-12-09 10:03:21,467 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:21,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:21,470 INFO L82 PathProgramCache]: Analyzing trace with hash 127161266, now seen corresponding path program 1 times [2018-12-09 10:03:21,472 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:21,473 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:21,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:21,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 10:03:21,545 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:21,552 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:21,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 10:03:21,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 10:03:21,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 10:03:21,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 10:03:21,564 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-12-09 10:03:21,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:21,579 INFO L93 Difference]: Finished difference Result 105 states and 146 transitions. [2018-12-09 10:03:21,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 10:03:21,580 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 35 [2018-12-09 10:03:21,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:21,588 INFO L225 Difference]: With dead ends: 105 [2018-12-09 10:03:21,588 INFO L226 Difference]: Without dead ends: 59 [2018-12-09 10:03:21,591 INFO L631 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 [2018-12-09 10:03:21,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-09 10:03:21,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-09 10:03:21,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-09 10:03:21,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2018-12-09 10:03:21,619 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 35 [2018-12-09 10:03:21,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:21,620 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2018-12-09 10:03:21,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 10:03:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2018-12-09 10:03:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-09 10:03:21,621 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:21,621 INFO L402 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] [2018-12-09 10:03:21,622 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:21,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:21,622 INFO L82 PathProgramCache]: Analyzing trace with hash -788283278, now seen corresponding path program 1 times [2018-12-09 10:03:21,622 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:21,622 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:21,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:21,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 10:03:21,681 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:21,687 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:21,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 10:03:21,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 10:03:21,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 10:03:21,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 10:03:21,689 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2018-12-09 10:03:21,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:21,722 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2018-12-09 10:03:21,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 10:03:21,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-12-09 10:03:21,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:21,724 INFO L225 Difference]: With dead ends: 108 [2018-12-09 10:03:21,724 INFO L226 Difference]: Without dead ends: 68 [2018-12-09 10:03:21,725 INFO L631 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 [2018-12-09 10:03:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-09 10:03:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2018-12-09 10:03:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-09 10:03:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-12-09 10:03:21,734 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-12-09 10:03:21,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:21,734 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-12-09 10:03:21,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 10:03:21,734 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-12-09 10:03:21,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-09 10:03:21,736 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:21,736 INFO L402 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] [2018-12-09 10:03:21,736 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:21,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:21,736 INFO L82 PathProgramCache]: Analyzing trace with hash -728340568, now seen corresponding path program 1 times [2018-12-09 10:03:21,737 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:21,737 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:21,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:21,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 10:03:21,797 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:21,803 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:21,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 10:03:21,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 10:03:21,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 10:03:21,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 10:03:21,804 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-12-09 10:03:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:21,821 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2018-12-09 10:03:21,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 10:03:21,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-12-09 10:03:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:21,824 INFO L225 Difference]: With dead ends: 86 [2018-12-09 10:03:21,824 INFO L226 Difference]: Without dead ends: 64 [2018-12-09 10:03:21,824 INFO L631 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 [2018-12-09 10:03:21,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-09 10:03:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-12-09 10:03:21,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 10:03:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-09 10:03:21,830 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 41 [2018-12-09 10:03:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:21,830 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-09 10:03:21,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 10:03:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-09 10:03:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-09 10:03:21,831 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:21,831 INFO L402 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] [2018-12-09 10:03:21,831 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:21,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:21,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1290130751, now seen corresponding path program 1 times [2018-12-09 10:03:21,832 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:21,832 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:21,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:21,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 10:03:21,881 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:21,888 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:21,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 10:03:21,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 10:03:21,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 10:03:21,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 10:03:21,889 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-12-09 10:03:21,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:21,905 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-09 10:03:21,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 10:03:21,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-12-09 10:03:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:21,907 INFO L225 Difference]: With dead ends: 89 [2018-12-09 10:03:21,907 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 10:03:21,907 INFO L631 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 [2018-12-09 10:03:21,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 10:03:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-12-09 10:03:21,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 10:03:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-09 10:03:21,915 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 42 [2018-12-09 10:03:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:21,915 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-09 10:03:21,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 10:03:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-09 10:03:21,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-09 10:03:21,916 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:21,917 INFO L402 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] [2018-12-09 10:03:21,917 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:21,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:21,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1173472140, now seen corresponding path program 1 times [2018-12-09 10:03:21,918 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:21,918 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:21,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:21,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 10:03:21,964 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:21,971 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:21,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 10:03:21,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 10:03:21,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 10:03:21,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 10:03:21,972 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-12-09 10:03:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:21,984 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-09 10:03:21,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 10:03:21,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-12-09 10:03:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:21,985 INFO L225 Difference]: With dead ends: 89 [2018-12-09 10:03:21,985 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 10:03:21,985 INFO L631 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 [2018-12-09 10:03:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 10:03:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-12-09 10:03:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 10:03:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-09 10:03:21,990 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 43 [2018-12-09 10:03:21,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:21,990 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-09 10:03:21,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 10:03:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-09 10:03:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-09 10:03:21,991 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:21,991 INFO L402 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] [2018-12-09 10:03:21,992 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:21,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:21,992 INFO L82 PathProgramCache]: Analyzing trace with hash -707704861, now seen corresponding path program 1 times [2018-12-09 10:03:21,992 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:21,992 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:21,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:22,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 10:03:22,036 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:22,043 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:22,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 10:03:22,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 10:03:22,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 10:03:22,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 10:03:22,044 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-12-09 10:03:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:22,056 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-09 10:03:22,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 10:03:22,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-12-09 10:03:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:22,058 INFO L225 Difference]: With dead ends: 89 [2018-12-09 10:03:22,058 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 10:03:22,058 INFO L631 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 [2018-12-09 10:03:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 10:03:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-12-09 10:03:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 10:03:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-09 10:03:22,064 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 44 [2018-12-09 10:03:22,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:22,065 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-09 10:03:22,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 10:03:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-09 10:03:22,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-09 10:03:22,066 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:22,066 INFO L402 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] [2018-12-09 10:03:22,066 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:22,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:22,067 INFO L82 PathProgramCache]: Analyzing trace with hash 799846948, now seen corresponding path program 1 times [2018-12-09 10:03:22,067 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:22,067 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:22,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:22,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-09 10:03:22,196 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 10:03:22,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 10:03:22,411 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:22,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:22,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-09 10:03:22,444 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:22,457 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 10:03:22,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 14 [2018-12-09 10:03:22,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-09 10:03:22,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-09 10:03:22,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-12-09 10:03:22,458 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 14 states. [2018-12-09 10:03:22,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:22,815 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2018-12-09 10:03:22,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 10:03:22,815 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2018-12-09 10:03:22,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:22,816 INFO L225 Difference]: With dead ends: 105 [2018-12-09 10:03:22,816 INFO L226 Difference]: Without dead ends: 91 [2018-12-09 10:03:22,817 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-12-09 10:03:22,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-12-09 10:03:22,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2018-12-09 10:03:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-12-09 10:03:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2018-12-09 10:03:22,825 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 44 [2018-12-09 10:03:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:22,825 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2018-12-09 10:03:22,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-09 10:03:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2018-12-09 10:03:22,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-09 10:03:22,827 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:22,827 INFO L402 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] [2018-12-09 10:03:22,827 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:22,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:22,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1433909297, now seen corresponding path program 1 times [2018-12-09 10:03:22,827 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:22,827 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:22,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:22,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 10:03:23,024 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 10:03:23,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 10:03:23,471 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:23,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:23,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-09 10:03:23,688 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 10:03:24,060 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2018-12-09 10:03:24,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11, 11] total 29 [2018-12-09 10:03:24,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-09 10:03:24,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-09 10:03:24,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2018-12-09 10:03:24,061 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand 29 states. [2018-12-09 10:03:25,623 WARN L180 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 19 [2018-12-09 10:03:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:26,335 INFO L93 Difference]: Finished difference Result 136 states and 179 transitions. [2018-12-09 10:03:26,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-09 10:03:26,336 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 49 [2018-12-09 10:03:26,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:26,337 INFO L225 Difference]: With dead ends: 136 [2018-12-09 10:03:26,337 INFO L226 Difference]: Without dead ends: 134 [2018-12-09 10:03:26,339 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2018-12-09 10:03:26,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-12-09 10:03:26,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2018-12-09 10:03:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-09 10:03:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2018-12-09 10:03:26,361 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 49 [2018-12-09 10:03:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:26,362 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2018-12-09 10:03:26,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-09 10:03:26,362 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2018-12-09 10:03:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-09 10:03:26,364 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:26,364 INFO L402 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] [2018-12-09 10:03:26,365 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:26,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:26,365 INFO L82 PathProgramCache]: Analyzing trace with hash -183164066, now seen corresponding path program 1 times [2018-12-09 10:03:26,365 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:26,365 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:26,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:26,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 10:03:26,462 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:26,474 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:26,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-09 10:03:26,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 10:03:26,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 10:03:26,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-12-09 10:03:26,475 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand 8 states. [2018-12-09 10:03:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:26,717 INFO L93 Difference]: Finished difference Result 158 states and 208 transitions. [2018-12-09 10:03:26,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 10:03:26,718 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2018-12-09 10:03:26,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:26,719 INFO L225 Difference]: With dead ends: 158 [2018-12-09 10:03:26,719 INFO L226 Difference]: Without dead ends: 105 [2018-12-09 10:03:26,719 INFO L631 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 [2018-12-09 10:03:26,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-12-09 10:03:26,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2018-12-09 10:03:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-09 10:03:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2018-12-09 10:03:26,726 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 53 [2018-12-09 10:03:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:26,726 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2018-12-09 10:03:26,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 10:03:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2018-12-09 10:03:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-09 10:03:26,727 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:26,727 INFO L402 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] [2018-12-09 10:03:26,727 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:26,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:26,727 INFO L82 PathProgramCache]: Analyzing trace with hash 374913712, now seen corresponding path program 1 times [2018-12-09 10:03:26,727 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:26,727 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:26,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:26,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 10:03:26,831 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 10:03:27,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 10:03:27,057 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:27,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:27,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-12-09 10:03:27,104 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:27,120 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 10:03:27,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 13 [2018-12-09 10:03:27,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 10:03:27,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 10:03:27,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-12-09 10:03:27,121 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand 13 states. [2018-12-09 10:03:27,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:27,375 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2018-12-09 10:03:27,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 10:03:27,375 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2018-12-09 10:03:27,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:27,376 INFO L225 Difference]: With dead ends: 110 [2018-12-09 10:03:27,376 INFO L226 Difference]: Without dead ends: 106 [2018-12-09 10:03:27,376 INFO L631 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 [2018-12-09 10:03:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-12-09 10:03:27,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2018-12-09 10:03:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-09 10:03:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2018-12-09 10:03:27,383 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 58 [2018-12-09 10:03:27,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:27,383 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2018-12-09 10:03:27,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 10:03:27,383 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2018-12-09 10:03:27,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-09 10:03:27,383 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:27,383 INFO L402 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] [2018-12-09 10:03:27,384 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:27,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:27,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1241696182, now seen corresponding path program 1 times [2018-12-09 10:03:27,384 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:27,384 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:27,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:27,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 10:03:27,439 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:27,447 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:27,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 10:03:27,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 10:03:27,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 10:03:27,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 10:03:27,448 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand 4 states. [2018-12-09 10:03:27,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:27,461 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2018-12-09 10:03:27,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 10:03:27,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2018-12-09 10:03:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:27,463 INFO L225 Difference]: With dead ends: 119 [2018-12-09 10:03:27,463 INFO L226 Difference]: Without dead ends: 92 [2018-12-09 10:03:27,463 INFO L631 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 [2018-12-09 10:03:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-12-09 10:03:27,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-12-09 10:03:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-09 10:03:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-12-09 10:03:27,470 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 61 [2018-12-09 10:03:27,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:27,470 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-12-09 10:03:27,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 10:03:27,470 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-12-09 10:03:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-09 10:03:27,471 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:27,471 INFO L402 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] [2018-12-09 10:03:27,471 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:27,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:27,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1403627392, now seen corresponding path program 1 times [2018-12-09 10:03:27,471 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:27,471 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:27,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:27,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 10:03:27,522 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:27,534 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:27,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 10:03:27,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 10:03:27,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 10:03:27,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 10:03:27,534 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 4 states. [2018-12-09 10:03:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:27,545 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2018-12-09 10:03:27,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 10:03:27,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-12-09 10:03:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:27,546 INFO L225 Difference]: With dead ends: 122 [2018-12-09 10:03:27,546 INFO L226 Difference]: Without dead ends: 95 [2018-12-09 10:03:27,546 INFO L631 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 [2018-12-09 10:03:27,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-12-09 10:03:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2018-12-09 10:03:27,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-09 10:03:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-12-09 10:03:27,551 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 55 [2018-12-09 10:03:27,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:27,551 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-12-09 10:03:27,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 10:03:27,551 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-12-09 10:03:27,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-09 10:03:27,552 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:27,552 INFO L402 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] [2018-12-09 10:03:27,552 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:27,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:27,552 INFO L82 PathProgramCache]: Analyzing trace with hash -342130789, now seen corresponding path program 1 times [2018-12-09 10:03:27,552 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:27,552 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:27,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:27,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-09 10:03:27,775 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:27,782 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:27,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-12-09 10:03:27,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 10:03:27,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 10:03:27,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-09 10:03:27,783 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 9 states. [2018-12-09 10:03:28,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:28,509 INFO L93 Difference]: Finished difference Result 147 states and 189 transitions. [2018-12-09 10:03:28,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 10:03:28,509 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2018-12-09 10:03:28,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:28,510 INFO L225 Difference]: With dead ends: 147 [2018-12-09 10:03:28,510 INFO L226 Difference]: Without dead ends: 122 [2018-12-09 10:03:28,510 INFO L631 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 [2018-12-09 10:03:28,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-12-09 10:03:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2018-12-09 10:03:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-12-09 10:03:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2018-12-09 10:03:28,516 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 63 [2018-12-09 10:03:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:28,516 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2018-12-09 10:03:28,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 10:03:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2018-12-09 10:03:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 10:03:28,517 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:28,517 INFO L402 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] [2018-12-09 10:03:28,517 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:28,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:28,517 INFO L82 PathProgramCache]: Analyzing trace with hash -235124114, now seen corresponding path program 1 times [2018-12-09 10:03:28,517 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:28,517 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:28,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:28,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 10:03:28,713 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:28,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 10:03:28,863 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:28,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:28,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 10:03:28,891 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:29,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 10:03:29,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-09 10:03:29,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 10:03:29,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 10:03:29,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-09 10:03:29,049 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand 8 states. [2018-12-09 10:03:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:29,801 INFO L93 Difference]: Finished difference Result 134 states and 170 transitions. [2018-12-09 10:03:29,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 10:03:29,802 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2018-12-09 10:03:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:29,802 INFO L225 Difference]: With dead ends: 134 [2018-12-09 10:03:29,802 INFO L226 Difference]: Without dead ends: 111 [2018-12-09 10:03:29,802 INFO L631 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 [2018-12-09 10:03:29,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-12-09 10:03:29,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2018-12-09 10:03:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-09 10:03:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 120 transitions. [2018-12-09 10:03:29,808 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 120 transitions. Word has length 56 [2018-12-09 10:03:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:29,808 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 120 transitions. [2018-12-09 10:03:29,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 10:03:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 120 transitions. [2018-12-09 10:03:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 10:03:29,808 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:29,808 INFO L402 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] [2018-12-09 10:03:29,809 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:29,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2065698476, now seen corresponding path program 1 times [2018-12-09 10:03:29,809 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:29,809 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:29,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:29,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-12-09 10:03:29,993 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:30,000 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:30,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-12-09 10:03:30,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 10:03:30,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 10:03:30,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-12-09 10:03:30,001 INFO L87 Difference]: Start difference. First operand 92 states and 120 transitions. Second operand 11 states. [2018-12-09 10:03:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:30,767 INFO L93 Difference]: Finished difference Result 121 states and 156 transitions. [2018-12-09 10:03:30,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 10:03:30,767 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-12-09 10:03:30,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:30,768 INFO L225 Difference]: With dead ends: 121 [2018-12-09 10:03:30,768 INFO L226 Difference]: Without dead ends: 119 [2018-12-09 10:03:30,768 INFO L631 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 [2018-12-09 10:03:30,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-12-09 10:03:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2018-12-09 10:03:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-09 10:03:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2018-12-09 10:03:30,776 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 56 [2018-12-09 10:03:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:30,776 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2018-12-09 10:03:30,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 10:03:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2018-12-09 10:03:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 10:03:30,776 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:30,777 INFO L402 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] [2018-12-09 10:03:30,777 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:30,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:30,777 INFO L82 PathProgramCache]: Analyzing trace with hash -341505115, now seen corresponding path program 1 times [2018-12-09 10:03:30,777 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:30,777 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:30,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:30,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 10:03:30,822 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:30,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:30,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 10:03:30,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 10:03:30,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 10:03:30,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 10:03:30,831 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 4 states. [2018-12-09 10:03:30,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:30,843 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2018-12-09 10:03:30,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 10:03:30,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-12-09 10:03:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:30,844 INFO L225 Difference]: With dead ends: 127 [2018-12-09 10:03:30,844 INFO L226 Difference]: Without dead ends: 100 [2018-12-09 10:03:30,845 INFO L631 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 [2018-12-09 10:03:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-12-09 10:03:30,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2018-12-09 10:03:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-09 10:03:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2018-12-09 10:03:30,850 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 56 [2018-12-09 10:03:30,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:30,850 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2018-12-09 10:03:30,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 10:03:30,850 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2018-12-09 10:03:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-09 10:03:30,851 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:30,851 INFO L402 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] [2018-12-09 10:03:30,851 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:30,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:30,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1176443467, now seen corresponding path program 1 times [2018-12-09 10:03:30,851 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:30,852 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:30,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:30,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-09 10:03:31,300 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:31,533 WARN L180 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-09 10:03:31,823 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2018-12-09 10:03:32,212 WARN L180 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-09 10:03:32,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 10:03:32,440 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:32,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:32,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 10:03:32,621 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:32,880 WARN L180 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-09 10:03:33,026 WARN L180 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-09 10:03:33,530 WARN L180 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-09 10:03:33,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 10:03:33,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 17 [2018-12-09 10:03:33,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 10:03:33,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 10:03:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-12-09 10:03:33,765 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 17 states. [2018-12-09 10:03:35,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:35,344 INFO L93 Difference]: Finished difference Result 154 states and 201 transitions. [2018-12-09 10:03:35,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-09 10:03:35,345 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-12-09 10:03:35,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:35,345 INFO L225 Difference]: With dead ends: 154 [2018-12-09 10:03:35,345 INFO L226 Difference]: Without dead ends: 127 [2018-12-09 10:03:35,346 INFO L631 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 [2018-12-09 10:03:35,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-12-09 10:03:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2018-12-09 10:03:35,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-12-09 10:03:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2018-12-09 10:03:35,352 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 63 [2018-12-09 10:03:35,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:35,352 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2018-12-09 10:03:35,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 10:03:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2018-12-09 10:03:35,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-12-09 10:03:35,352 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:35,352 INFO L402 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] [2018-12-09 10:03:35,353 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:35,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:35,353 INFO L82 PathProgramCache]: Analyzing trace with hash -361444970, now seen corresponding path program 1 times [2018-12-09 10:03:35,353 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:35,353 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:35,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:35,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 10:03:35,474 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-09 10:03:35,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 10:03:35,639 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:35,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:35,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-09 10:03:35,708 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-09 10:03:35,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 10:03:35,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 12] total 17 [2018-12-09 10:03:35,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 10:03:35,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 10:03:35,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-12-09 10:03:35,865 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 17 states. [2018-12-09 10:03:36,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:36,296 INFO L93 Difference]: Finished difference Result 149 states and 192 transitions. [2018-12-09 10:03:36,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 10:03:36,296 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2018-12-09 10:03:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:36,297 INFO L225 Difference]: With dead ends: 149 [2018-12-09 10:03:36,297 INFO L226 Difference]: Without dead ends: 119 [2018-12-09 10:03:36,297 INFO L631 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 [2018-12-09 10:03:36,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-12-09 10:03:36,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2018-12-09 10:03:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-12-09 10:03:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2018-12-09 10:03:36,303 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 64 [2018-12-09 10:03:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:36,303 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2018-12-09 10:03:36,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 10:03:36,303 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2018-12-09 10:03:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-09 10:03:36,303 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:36,303 INFO L402 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] [2018-12-09 10:03:36,304 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:36,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:36,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1339205341, now seen corresponding path program 1 times [2018-12-09 10:03:36,304 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:36,304 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:36,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:36,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 10:03:36,508 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 10:03:36,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 10:03:36,887 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:36,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:36,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-09 10:03:37,022 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 10:03:37,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 10:03:37,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 15, 14] total 26 [2018-12-09 10:03:37,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-09 10:03:37,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-09 10:03:37,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2018-12-09 10:03:37,311 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand 26 states. [2018-12-09 10:03:38,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:38,590 INFO L93 Difference]: Finished difference Result 154 states and 199 transitions. [2018-12-09 10:03:38,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-09 10:03:38,590 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2018-12-09 10:03:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:38,591 INFO L225 Difference]: With dead ends: 154 [2018-12-09 10:03:38,591 INFO L226 Difference]: Without dead ends: 152 [2018-12-09 10:03:38,592 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2018-12-09 10:03:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-12-09 10:03:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 111. [2018-12-09 10:03:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-12-09 10:03:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 148 transitions. [2018-12-09 10:03:38,607 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 148 transitions. Word has length 57 [2018-12-09 10:03:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:38,608 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 148 transitions. [2018-12-09 10:03:38,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-09 10:03:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 148 transitions. [2018-12-09 10:03:38,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-09 10:03:38,609 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:38,609 INFO L402 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] [2018-12-09 10:03:38,609 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:38,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:38,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1812913204, now seen corresponding path program 1 times [2018-12-09 10:03:38,610 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:38,610 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:38,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:38,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-09 10:03:38,730 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-12-09 10:03:38,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 10:03:38,900 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 10:03:38,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:38,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-09 10:03:38,929 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-12-09 10:03:39,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 10:03:39,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9] total 13 [2018-12-09 10:03:39,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 10:03:39,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 10:03:39,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-12-09 10:03:39,057 INFO L87 Difference]: Start difference. First operand 111 states and 148 transitions. Second operand 13 states. [2018-12-09 10:03:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:39,409 INFO L93 Difference]: Finished difference Result 195 states and 246 transitions. [2018-12-09 10:03:39,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 10:03:39,409 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2018-12-09 10:03:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:39,409 INFO L225 Difference]: With dead ends: 195 [2018-12-09 10:03:39,410 INFO L226 Difference]: Without dead ends: 113 [2018-12-09 10:03:39,410 INFO L631 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 [2018-12-09 10:03:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-12-09 10:03:39,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 91. [2018-12-09 10:03:39,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-09 10:03:39,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2018-12-09 10:03:39,415 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 69 [2018-12-09 10:03:39,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:39,415 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2018-12-09 10:03:39,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 10:03:39,415 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2018-12-09 10:03:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-09 10:03:39,415 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:39,415 INFO L402 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] [2018-12-09 10:03:39,416 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:39,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:39,416 INFO L82 PathProgramCache]: Analyzing trace with hash -241334884, now seen corresponding path program 1 times [2018-12-09 10:03:39,416 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:39,416 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:39,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:39,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 10:03:39,469 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:39,476 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:39,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 10:03:39,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 10:03:39,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 10:03:39,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 10:03:39,477 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 4 states. [2018-12-09 10:03:39,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:39,487 INFO L93 Difference]: Finished difference Result 122 states and 153 transitions. [2018-12-09 10:03:39,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 10:03:39,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-12-09 10:03:39,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:39,488 INFO L225 Difference]: With dead ends: 122 [2018-12-09 10:03:39,488 INFO L226 Difference]: Without dead ends: 93 [2018-12-09 10:03:39,489 INFO L631 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 [2018-12-09 10:03:39,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-09 10:03:39,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-12-09 10:03:39,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-09 10:03:39,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2018-12-09 10:03:39,494 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 57 [2018-12-09 10:03:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:39,494 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2018-12-09 10:03:39,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 10:03:39,495 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2018-12-09 10:03:39,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-09 10:03:39,495 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:39,495 INFO L402 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] [2018-12-09 10:03:39,495 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:39,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:39,495 INFO L82 PathProgramCache]: Analyzing trace with hash -650159109, now seen corresponding path program 1 times [2018-12-09 10:03:39,495 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:39,495 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/mathsat Starting monitored process 31 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with mathsat -unsat_core_generation=3 [2018-12-09 10:03:39,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:39,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-09 10:03:39,969 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:39,976 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:39,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2018-12-09 10:03:39,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-09 10:03:39,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-09 10:03:39,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-12-09 10:03:39,977 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 15 states. [2018-12-09 10:03:41,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:41,233 INFO L93 Difference]: Finished difference Result 130 states and 163 transitions. [2018-12-09 10:03:41,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-09 10:03:41,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-12-09 10:03:41,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:41,234 INFO L225 Difference]: With dead ends: 130 [2018-12-09 10:03:41,234 INFO L226 Difference]: Without dead ends: 96 [2018-12-09 10:03:41,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2018-12-09 10:03:41,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-12-09 10:03:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2018-12-09 10:03:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-09 10:03:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2018-12-09 10:03:41,239 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 57 [2018-12-09 10:03:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:41,240 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2018-12-09 10:03:41,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-09 10:03:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2018-12-09 10:03:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-09 10:03:41,240 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:41,240 INFO L402 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] [2018-12-09 10:03:41,240 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:41,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:41,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1134884075, now seen corresponding path program 1 times [2018-12-09 10:03:41,241 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:41,241 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:41,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:41,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 10:03:41,342 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-12-09 10:03:41,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 10:03:41,524 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:41,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:41,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 10:03:41,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-12-09 10:03:41,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 10:03:41,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 9] total 17 [2018-12-09 10:03:41,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 10:03:41,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 10:03:41,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-12-09 10:03:41,824 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 17 states. [2018-12-09 10:03:42,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:42,198 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2018-12-09 10:03:42,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-09 10:03:42,198 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2018-12-09 10:03:42,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:42,199 INFO L225 Difference]: With dead ends: 92 [2018-12-09 10:03:42,199 INFO L226 Difference]: Without dead ends: 60 [2018-12-09 10:03:42,199 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2018-12-09 10:03:42,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-09 10:03:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2018-12-09 10:03:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-09 10:03:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2018-12-09 10:03:42,202 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 61 [2018-12-09 10:03:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:42,202 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2018-12-09 10:03:42,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 10:03:42,203 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2018-12-09 10:03:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-12-09 10:03:42,203 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:42,203 INFO L402 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] [2018-12-09 10:03:42,203 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:42,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:42,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1573046304, now seen corresponding path program 1 times [2018-12-09 10:03:42,204 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:42,204 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:42,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:42,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 10:03:42,414 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:42,421 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:42,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-09 10:03:42,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 10:03:42,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 10:03:42,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-09 10:03:42,422 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 12 states. [2018-12-09 10:03:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:42,980 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2018-12-09 10:03:42,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 10:03:42,980 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2018-12-09 10:03:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:42,980 INFO L225 Difference]: With dead ends: 79 [2018-12-09 10:03:42,981 INFO L226 Difference]: Without dead ends: 58 [2018-12-09 10:03:42,981 INFO L631 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 [2018-12-09 10:03:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-09 10:03:42,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-12-09 10:03:42,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-09 10:03:42,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-12-09 10:03:42,983 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 70 [2018-12-09 10:03:42,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:42,983 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-12-09 10:03:42,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 10:03:42,983 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-12-09 10:03:42,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-12-09 10:03:42,984 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:42,984 INFO L402 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] [2018-12-09 10:03:42,984 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:42,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:42,984 INFO L82 PathProgramCache]: Analyzing trace with hash -193580157, now seen corresponding path program 1 times [2018-12-09 10:03:42,984 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:42,984 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:42,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:43,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 10:03:43,237 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:43,244 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:43,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-09 10:03:43,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 10:03:43,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 10:03:43,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-09 10:03:43,245 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 12 states. [2018-12-09 10:03:43,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:43,948 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2018-12-09 10:03:43,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 10:03:43,949 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2018-12-09 10:03:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:43,949 INFO L225 Difference]: With dead ends: 81 [2018-12-09 10:03:43,949 INFO L226 Difference]: Without dead ends: 60 [2018-12-09 10:03:43,949 INFO L631 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 [2018-12-09 10:03:43,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-09 10:03:43,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2018-12-09 10:03:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-09 10:03:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-12-09 10:03:43,952 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 71 [2018-12-09 10:03:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:43,952 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-12-09 10:03:43,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 10:03:43,952 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-12-09 10:03:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-12-09 10:03:43,952 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:43,952 INFO L402 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] [2018-12-09 10:03:43,952 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:43,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:43,953 INFO L82 PathProgramCache]: Analyzing trace with hash 997969323, now seen corresponding path program 1 times [2018-12-09 10:03:43,953 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:43,953 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:43,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:44,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-09 10:03:44,114 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-09 10:03:44,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 10:03:44,703 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:44,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:44,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-09 10:03:44,753 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-09 10:03:45,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 10:03:45,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 17 [2018-12-09 10:03:45,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 10:03:45,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 10:03:45,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-12-09 10:03:45,099 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 17 states. [2018-12-09 10:03:45,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:45,721 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2018-12-09 10:03:45,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 10:03:45,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-12-09 10:03:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:45,722 INFO L225 Difference]: With dead ends: 83 [2018-12-09 10:03:45,722 INFO L226 Difference]: Without dead ends: 68 [2018-12-09 10:03:45,722 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 262 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2018-12-09 10:03:45,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-09 10:03:45,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2018-12-09 10:03:45,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-09 10:03:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-12-09 10:03:45,725 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 71 [2018-12-09 10:03:45,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:45,725 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-12-09 10:03:45,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 10:03:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-12-09 10:03:45,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-12-09 10:03:45,725 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:45,725 INFO L402 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] [2018-12-09 10:03:45,725 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:45,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:45,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1902363068, now seen corresponding path program 1 times [2018-12-09 10:03:45,726 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:45,726 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:45,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:45,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 10:03:45,996 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:46,003 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:46,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-09 10:03:46,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 10:03:46,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 10:03:46,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-09 10:03:46,004 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 12 states. [2018-12-09 10:03:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:46,789 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2018-12-09 10:03:46,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 10:03:46,790 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2018-12-09 10:03:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:46,790 INFO L225 Difference]: With dead ends: 85 [2018-12-09 10:03:46,790 INFO L226 Difference]: Without dead ends: 64 [2018-12-09 10:03:46,791 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-09 10:03:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-09 10:03:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2018-12-09 10:03:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-09 10:03:46,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-12-09 10:03:46,794 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 72 [2018-12-09 10:03:46,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:46,794 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-12-09 10:03:46,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 10:03:46,794 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-12-09 10:03:46,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-12-09 10:03:46,795 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:46,795 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 10:03:46,795 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:46,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:46,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1845453958, now seen corresponding path program 1 times [2018-12-09 10:03:46,796 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:46,796 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/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 [2018-12-09 10:03:46,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:46,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-12-09 10:03:46,953 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:47,324 WARN L180 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-12-09 10:03:47,484 WARN L180 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-12-09 10:03:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-12-09 10:03:47,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 10:03:47,516 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 10:03:47,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:47,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-09 10:03:47,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 10:03:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-12-09 10:03:47,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 10:03:47,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12, 13] total 22 [2018-12-09 10:03:47,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-09 10:03:47,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-09 10:03:47,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2018-12-09 10:03:47,816 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 22 states. [2018-12-09 10:03:48,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:48,361 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2018-12-09 10:03:48,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 10:03:48,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2018-12-09 10:03:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:48,362 INFO L225 Difference]: With dead ends: 78 [2018-12-09 10:03:48,362 INFO L226 Difference]: Without dead ends: 63 [2018-12-09 10:03:48,362 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2018-12-09 10:03:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-09 10:03:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2018-12-09 10:03:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-09 10:03:48,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2018-12-09 10:03:48,365 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 72 [2018-12-09 10:03:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:48,365 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2018-12-09 10:03:48,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-09 10:03:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2018-12-09 10:03:48,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-09 10:03:48,365 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:48,365 INFO L402 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] [2018-12-09 10:03:48,365 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:48,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:48,366 INFO L82 PathProgramCache]: Analyzing trace with hash -562618969, now seen corresponding path program 1 times [2018-12-09 10:03:48,366 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:48,366 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/mathsat Starting monitored process 41 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with mathsat -unsat_core_generation=3 [2018-12-09 10:03:48,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:48,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 10:03:48,583 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:48,591 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:48,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-09 10:03:48,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 10:03:48,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 10:03:48,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-09 10:03:48,592 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 12 states. [2018-12-09 10:03:49,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:49,327 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2018-12-09 10:03:49,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 10:03:49,327 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2018-12-09 10:03:49,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:49,328 INFO L225 Difference]: With dead ends: 78 [2018-12-09 10:03:49,328 INFO L226 Difference]: Without dead ends: 57 [2018-12-09 10:03:49,328 INFO L631 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 [2018-12-09 10:03:49,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-09 10:03:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2018-12-09 10:03:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-09 10:03:49,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2018-12-09 10:03:49,330 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 73 [2018-12-09 10:03:49,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:49,331 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2018-12-09 10:03:49,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 10:03:49,331 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2018-12-09 10:03:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-09 10:03:49,331 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 10:03:49,331 INFO L402 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] [2018-12-09 10:03:49,331 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 10:03:49,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 10:03:49,331 INFO L82 PathProgramCache]: Analyzing trace with hash 130482728, now seen corresponding path program 1 times [2018-12-09 10:03:49,331 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 10:03:49,331 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/mathsat Starting monitored process 42 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with mathsat -unsat_core_generation=3 [2018-12-09 10:03:49,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 10:03:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 10:03:49,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 10:03:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-09 10:03:49,393 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 10:03:49,400 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 10:03:49,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 10:03:49,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 10:03:49,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 10:03:49,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 10:03:49,401 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 4 states. [2018-12-09 10:03:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 10:03:49,406 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-12-09 10:03:49,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 10:03:49,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2018-12-09 10:03:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 10:03:49,407 INFO L225 Difference]: With dead ends: 58 [2018-12-09 10:03:49,407 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 10:03:49,407 INFO L631 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 [2018-12-09 10:03:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 10:03:49,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 10:03:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 10:03:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 10:03:49,408 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2018-12-09 10:03:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 10:03:49,408 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 10:03:49,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 10:03:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 10:03:49,408 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 10:03:49,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 10:03:49,509 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 10:03:49,788 INFO L448 ceAbstractionStarter]: For program point isnan_floatFINAL(line 55) no Hoare annotation was computed. [2018-12-09 10:03:49,788 INFO L451 ceAbstractionStarter]: At program point isnan_floatENTRY(line 55) the Hoare annotation is: true [2018-12-09 10:03:49,788 INFO L448 ceAbstractionStarter]: For program point isnan_floatEXIT(line 55) no Hoare annotation was computed. [2018-12-09 10:03:49,788 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-12-09 10:03:49,788 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-12-09 10:03:49,788 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 10:03:49,789 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 10:03:49,789 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 10:03:49,789 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 10:03:49,789 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 10:03:49,789 INFO L444 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|) [2018-12-09 10:03:49,789 INFO L448 ceAbstractionStarter]: For program point L68-4(line 68) no Hoare annotation was computed. [2018-12-09 10:03:49,789 INFO L448 ceAbstractionStarter]: For program point L68-6(line 68) no Hoare annotation was computed. [2018-12-09 10:03:49,789 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 57 86) no Hoare annotation was computed. [2018-12-09 10:03:49,789 INFO L444 ceAbstractionStarter]: At program point L73(line 73) the Hoare annotation is: (let ((.cse1 (fp.eq main_~y~0 main_~y~0)) (.cse0 (fp.eq main_~x~0 main_~x~0))) (or (and (= main_~x~0 main_~res~0) .cse0 (not .cse1)) (and (= main_~y~0 main_~res~0) .cse1 (not .cse0)))) [2018-12-09 10:03:49,789 INFO L448 ceAbstractionStarter]: For program point L73-1(line 73) no Hoare annotation was computed. [2018-12-09 10:03:49,789 INFO L448 ceAbstractionStarter]: For program point L73-2(line 73) no Hoare annotation was computed. [2018-12-09 10:03:49,789 INFO L444 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|) (fp.eq main_~y~0 main_~y~0) (not (fp.eq main_~x~0 main_~x~0))) [2018-12-09 10:03:49,789 INFO L448 ceAbstractionStarter]: For program point L73-4(line 73) no Hoare annotation was computed. [2018-12-09 10:03:49,790 INFO L448 ceAbstractionStarter]: For program point L73-6(lines 73 76) no Hoare annotation was computed. [2018-12-09 10:03:49,790 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 74) no Hoare annotation was computed. [2018-12-09 10:03:49,790 INFO L448 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 80) no Hoare annotation was computed. [2018-12-09 10:03:49,790 INFO L448 ceAbstractionStarter]: For program point L74(line 74) no Hoare annotation was computed. [2018-12-09 10:03:49,790 INFO L444 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)))) [2018-12-09 10:03:49,790 INFO L448 ceAbstractionStarter]: For program point L70-1(line 70) no Hoare annotation was computed. [2018-12-09 10:03:49,790 INFO L444 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))) [2018-12-09 10:03:49,790 INFO L448 ceAbstractionStarter]: For program point L79-1(line 79) no Hoare annotation was computed. [2018-12-09 10:03:49,790 INFO L448 ceAbstractionStarter]: For program point L79-2(line 79) no Hoare annotation was computed. [2018-12-09 10:03:49,790 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 57 86) no Hoare annotation was computed. [2018-12-09 10:03:49,790 INFO L444 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))) [2018-12-09 10:03:49,790 INFO L448 ceAbstractionStarter]: For program point L79-4(line 79) no Hoare annotation was computed. [2018-12-09 10:03:49,790 INFO L448 ceAbstractionStarter]: For program point L79-6(lines 79 82) no Hoare annotation was computed. [2018-12-09 10:03:49,790 INFO L451 ceAbstractionStarter]: At program point L67(line 67) the Hoare annotation is: true [2018-12-09 10:03:49,791 INFO L448 ceAbstractionStarter]: For program point L67-1(line 67) no Hoare annotation was computed. [2018-12-09 10:03:49,791 INFO L448 ceAbstractionStarter]: For program point L67-2(line 67) no Hoare annotation was computed. [2018-12-09 10:03:49,791 INFO L444 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))) [2018-12-09 10:03:49,791 INFO L448 ceAbstractionStarter]: For program point L67-4(line 67) no Hoare annotation was computed. [2018-12-09 10:03:49,791 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 57 86) the Hoare annotation is: true [2018-12-09 10:03:49,791 INFO L448 ceAbstractionStarter]: For program point L67-6(line 67) no Hoare annotation was computed. [2018-12-09 10:03:49,791 INFO L448 ceAbstractionStarter]: For program point L67-7(lines 67 68) no Hoare annotation was computed. [2018-12-09 10:03:49,791 INFO L448 ceAbstractionStarter]: For program point L67-9(lines 67 83) no Hoare annotation was computed. [2018-12-09 10:03:49,791 INFO L448 ceAbstractionStarter]: For program point L67-11(lines 67 83) no Hoare annotation was computed. [2018-12-09 10:03:49,791 INFO L448 ceAbstractionStarter]: For program point L80(line 80) no Hoare annotation was computed. [2018-12-09 10:03:49,791 INFO L444 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))))) [2018-12-09 10:03:49,791 INFO L448 ceAbstractionStarter]: For program point L68-1(line 68) no Hoare annotation was computed. [2018-12-09 10:03:49,791 INFO L448 ceAbstractionStarter]: For program point L68-2(line 68) no Hoare annotation was computed. [2018-12-09 10:03:49,791 INFO L448 ceAbstractionStarter]: For program point fmax_floatEXIT(lines 43 52) no Hoare annotation was computed. [2018-12-09 10:03:49,792 INFO L451 ceAbstractionStarter]: At program point fmax_floatENTRY(lines 43 52) the Hoare annotation is: true [2018-12-09 10:03:49,792 INFO L448 ceAbstractionStarter]: For program point L51(line 51) no Hoare annotation was computed. [2018-12-09 10:03:49,792 INFO L448 ceAbstractionStarter]: For program point L51-2(line 51) no Hoare annotation was computed. [2018-12-09 10:03:49,792 INFO L444 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)) [2018-12-09 10:03:49,792 INFO L448 ceAbstractionStarter]: For program point L48-1(lines 48 50) no Hoare annotation was computed. [2018-12-09 10:03:49,792 INFO L444 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)) [2018-12-09 10:03:49,792 INFO L448 ceAbstractionStarter]: For program point L44-1(lines 44 46) no Hoare annotation was computed. [2018-12-09 10:03:49,792 INFO L448 ceAbstractionStarter]: For program point fmax_floatFINAL(lines 43 52) no Hoare annotation was computed. [2018-12-09 10:03:49,792 INFO L448 ceAbstractionStarter]: For program point L31(lines 31 40) no Hoare annotation was computed. [2018-12-09 10:03:49,792 INFO L448 ceAbstractionStarter]: For program point __fpclassify_floatFINAL(lines 20 41) no Hoare annotation was computed. [2018-12-09 10:03:49,792 INFO L448 ceAbstractionStarter]: For program point L23-1(lines 23 27) no Hoare annotation was computed. [2018-12-09 10:03:49,792 INFO L444 ceAbstractionStarter]: At program point L23-2(lines 23 27) the Hoare annotation is: (= __fpclassify_float_~x |__fpclassify_float_#in~x|) [2018-12-09 10:03:49,792 INFO L448 ceAbstractionStarter]: For program point L23-3(lines 20 41) no Hoare annotation was computed. [2018-12-09 10:03:49,792 INFO L448 ceAbstractionStarter]: For program point L34(lines 34 40) no Hoare annotation was computed. [2018-12-09 10:03:49,793 INFO L451 ceAbstractionStarter]: At program point __fpclassify_floatENTRY(lines 20 41) the Hoare annotation is: true [2018-12-09 10:03:49,793 INFO L448 ceAbstractionStarter]: For program point __fpclassify_floatEXIT(lines 20 41) no Hoare annotation was computed. [2018-12-09 10:03:49,793 INFO L448 ceAbstractionStarter]: For program point L37(lines 37 40) no Hoare annotation was computed. [2018-12-09 10:03:49,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:03:49 BoogieIcfgContainer [2018-12-09 10:03:49,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 10:03:49,803 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 10:03:49,803 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 10:03:49,804 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 10:03:49,804 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:03:21" (3/4) ... [2018-12-09 10:03:49,807 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 10:03:49,812 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2018-12-09 10:03:49,812 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 10:03:49,813 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 10:03:49,813 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fmax_float [2018-12-09 10:03:49,813 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2018-12-09 10:03:49,817 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2018-12-09 10:03:49,817 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-09 10:03:49,817 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 10:03:49,841 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: x == \old(x) [2018-12-09 10:03:49,860 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_330a57dc-9acc-4bd0-b17b-b327e6b1b399/bin-2019/utaipan/witness.graphml [2018-12-09 10:03:49,860 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 10:03:49,861 INFO L168 Benchmark]: Toolchain (without parser) took 28878.10 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 383.8 MB). Free memory was 944.7 MB in the beginning and 851.5 MB in the end (delta: 93.2 MB). Peak memory consumption was 476.9 MB. Max. memory is 11.5 GB. [2018-12-09 10:03:49,861 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 10:03:49,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 145.83 ms. Allocated memory is still 1.0 GB. Free memory was 944.7 MB in the beginning and 934.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 10:03:49,862 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.04 ms. Allocated memory is still 1.0 GB. Free memory was 934.0 MB in the beginning and 928.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-09 10:03:49,862 INFO L168 Benchmark]: Boogie Preprocessor took 21.02 ms. Allocated memory is still 1.0 GB. Free memory is still 928.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 10:03:49,862 INFO L168 Benchmark]: RCFGBuilder took 243.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 928.6 MB in the beginning and 1.1 GB in the end (delta: -172.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-12-09 10:03:49,862 INFO L168 Benchmark]: TraceAbstraction took 28391.45 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 252.7 MB). Free memory was 1.1 GB in the beginning and 851.5 MB in the end (delta: 249.4 MB). Peak memory consumption was 502.1 MB. Max. memory is 11.5 GB. [2018-12-09 10:03:49,863 INFO L168 Benchmark]: Witness Printer took 57.00 ms. Allocated memory is still 1.4 GB. Free memory is still 851.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 10:03:49,864 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 145.83 ms. Allocated memory is still 1.0 GB. Free memory was 944.7 MB in the beginning and 934.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.04 ms. Allocated memory is still 1.0 GB. Free memory was 934.0 MB in the beginning and 928.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.02 ms. Allocated memory is still 1.0 GB. Free memory is still 928.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 243.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 928.6 MB in the beginning and 1.1 GB in the end (delta: -172.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 28391.45 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 252.7 MB). Free memory was 1.1 GB in the beginning and 851.5 MB in the end (delta: 249.4 MB). Peak memory consumption was 502.1 MB. Max. memory is 11.5 GB. * Witness Printer took 57.00 ms. Allocated memory is still 1.4 GB. Free memory is still 851.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 80]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 74]: 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, 30 OverallIterations, 6 TraceHistogramMax, 14.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 2057 SDtfs, 1208 SDslu, 12572 SDs, 0 SdLazy, 6208 SolverSat, 378 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3551 GetRequests, 3157 SyntacticMatches, 13 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 9.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 30 MinimizatonAttempts, 317 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 169 PreInvPairs, 193 NumberOfFragments, 163 HoareAnnotationTreeSize, 169 FomulaSimplifications, 18973 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 19 FomulaSimplificationsInter, 71 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 10.9s InterpolantComputationTime, 2386 NumberOfCodeBlocks, 2386 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 3317 ConstructedInterpolants, 35 QuantifiedInterpolants, 631572 SizeOfPredicates, 209 NumberOfNonLiveVariables, 5124 ConjunctsInSsa, 446 ConjunctsInUnsatCore, 57 InterpolantComputations, 22 PerfectInterpolantSequences, 1646/1870 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...