./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 65a8838494b0fa2a560742eb829642f08a5d8cc8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 65a8838494b0fa2a560742eb829642f08a5d8cc8 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-03 06:23:25,994 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 06:23:25,995 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 06:23:26,001 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 06:23:26,001 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 06:23:26,001 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 06:23:26,002 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 06:23:26,003 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 06:23:26,004 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 06:23:26,004 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 06:23:26,005 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 06:23:26,005 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 06:23:26,005 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 06:23:26,006 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 06:23:26,006 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 06:23:26,007 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 06:23:26,007 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 06:23:26,008 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 06:23:26,009 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 06:23:26,010 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 06:23:26,010 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 06:23:26,011 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 06:23:26,012 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 06:23:26,012 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 06:23:26,012 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 06:23:26,013 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 06:23:26,013 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 06:23:26,014 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 06:23:26,014 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 06:23:26,015 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 06:23:26,015 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 06:23:26,015 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 06:23:26,015 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 06:23:26,015 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 06:23:26,016 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 06:23:26,016 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 06:23:26,016 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-03 06:23:26,024 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 06:23:26,024 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 06:23:26,024 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 06:23:26,025 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 06:23:26,025 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 06:23:26,025 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 06:23:26,025 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 06:23:26,025 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 06:23:26,025 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 06:23:26,025 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 06:23:26,025 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 06:23:26,025 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-03 06:23:26,025 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 06:23:26,026 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 06:23:26,026 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 06:23:26,026 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 06:23:26,026 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 06:23:26,026 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 06:23:26,026 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 06:23:26,026 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 06:23:26,026 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 06:23:26,026 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 06:23:26,026 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 06:23:26,027 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 06:23:26,027 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 06:23:26,027 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 06:23:26,027 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 06:23:26,027 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 06:23:26,027 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 06:23:26,027 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 06:23:26,027 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 06:23:26,027 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 06:23:26,027 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 06:23:26,028 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 06:23:26,028 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 06:23:26,028 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 06:23:26,028 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_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65a8838494b0fa2a560742eb829642f08a5d8cc8 [2018-12-03 06:23:26,046 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 06:23:26,055 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 06:23:26,057 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 06:23:26,058 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 06:23:26,058 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 06:23:26,059 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-12-03 06:23:26,099 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/data/8fb20dbd6/a40ce95f5f0f4dd7b4dedc23a62d025a/FLAGc18926854 [2018-12-03 06:23:26,534 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 06:23:26,534 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-12-03 06:23:26,538 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/data/8fb20dbd6/a40ce95f5f0f4dd7b4dedc23a62d025a/FLAGc18926854 [2018-12-03 06:23:26,547 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/data/8fb20dbd6/a40ce95f5f0f4dd7b4dedc23a62d025a [2018-12-03 06:23:26,548 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 06:23:26,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 06:23:26,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 06:23:26,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 06:23:26,552 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 06:23:26,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 06:23:26" (1/1) ... [2018-12-03 06:23:26,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26c1f7bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:26, skipping insertion in model container [2018-12-03 06:23:26,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 06:23:26" (1/1) ... [2018-12-03 06:23:26,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 06:23:26,569 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 06:23:26,662 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 06:23:26,664 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 06:23:26,679 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 06:23:26,696 INFO L195 MainTranslator]: Completed translation [2018-12-03 06:23:26,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:26 WrapperNode [2018-12-03 06:23:26,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 06:23:26,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 06:23:26,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 06:23:26,697 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 06:23:26,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:26" (1/1) ... [2018-12-03 06:23:26,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:26" (1/1) ... [2018-12-03 06:23:26,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 06:23:26,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 06:23:26,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 06:23:26,741 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 06:23:26,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:26" (1/1) ... [2018-12-03 06:23:26,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:26" (1/1) ... [2018-12-03 06:23:26,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:26" (1/1) ... [2018-12-03 06:23:26,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:26" (1/1) ... [2018-12-03 06:23:26,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:26" (1/1) ... [2018-12-03 06:23:26,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:26" (1/1) ... [2018-12-03 06:23:26,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:26" (1/1) ... [2018-12-03 06:23:26,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 06:23:26,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 06:23:26,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 06:23:26,759 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 06:23:26,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:26,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 06:23:26,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 06:23:26,790 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-12-03 06:23:26,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-12-03 06:23:26,790 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-12-03 06:23:26,790 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-12-03 06:23:26,790 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2018-12-03 06:23:26,790 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2018-12-03 06:23:26,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 06:23:26,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 06:23:26,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2018-12-03 06:23:26,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-03 06:23:26,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 06:23:26,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 06:23:26,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-03 06:23:26,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-03 06:23:26,944 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 06:23:26,944 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-03 06:23:26,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:23:26 BoogieIcfgContainer [2018-12-03 06:23:26,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 06:23:26,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 06:23:26,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 06:23:26,947 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 06:23:26,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 06:23:26" (1/3) ... [2018-12-03 06:23:26,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea7f31f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:23:26, skipping insertion in model container [2018-12-03 06:23:26,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:26" (2/3) ... [2018-12-03 06:23:26,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea7f31f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:23:26, skipping insertion in model container [2018-12-03 06:23:26,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:23:26" (3/3) ... [2018-12-03 06:23:26,949 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231_true-unreach-call.c [2018-12-03 06:23:26,954 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 06:23:26,958 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-12-03 06:23:26,967 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-12-03 06:23:26,986 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 06:23:26,986 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 06:23:26,986 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 06:23:26,986 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 06:23:26,987 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 06:23:26,987 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 06:23:26,987 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 06:23:26,987 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 06:23:26,997 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2018-12-03 06:23:27,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-03 06:23:27,001 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:27,002 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] [2018-12-03 06:23:27,003 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:27,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:27,006 INFO L82 PathProgramCache]: Analyzing trace with hash -388929614, now seen corresponding path program 1 times [2018-12-03 06:23:27,008 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:23:27,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:23:27,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:27,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:23:27,035 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:23:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:23:27,093 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:27,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 06:23:27,093 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:23:27,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-03 06:23:27,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-03 06:23:27,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-03 06:23:27,105 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2018-12-03 06:23:27,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:27,120 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions. [2018-12-03 06:23:27,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-03 06:23:27,121 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 36 [2018-12-03 06:23:27,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:27,127 INFO L225 Difference]: With dead ends: 109 [2018-12-03 06:23:27,127 INFO L226 Difference]: Without dead ends: 61 [2018-12-03 06:23:27,129 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 [2018-12-03 06:23:27,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-03 06:23:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-12-03 06:23:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-03 06:23:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-12-03 06:23:27,155 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-12-03 06:23:27,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:27,156 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-12-03 06:23:27,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-03 06:23:27,156 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-12-03 06:23:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-03 06:23:27,158 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:27,158 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] [2018-12-03 06:23:27,158 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:27,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:27,158 INFO L82 PathProgramCache]: Analyzing trace with hash 689386628, now seen corresponding path program 1 times [2018-12-03 06:23:27,158 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:23:27,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:23:27,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:27,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:23:27,159 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:23:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:23:27,204 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:27,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:23:27,205 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:23:27,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:23:27,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:23:27,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:23:27,206 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-12-03 06:23:27,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:27,246 INFO L93 Difference]: Finished difference Result 112 states and 147 transitions. [2018-12-03 06:23:27,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 06:23:27,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-12-03 06:23:27,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:27,247 INFO L225 Difference]: With dead ends: 112 [2018-12-03 06:23:27,247 INFO L226 Difference]: Without dead ends: 70 [2018-12-03 06:23:27,248 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 [2018-12-03 06:23:27,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-03 06:23:27,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2018-12-03 06:23:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-03 06:23:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2018-12-03 06:23:27,254 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 37 [2018-12-03 06:23:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:27,254 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2018-12-03 06:23:27,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:23:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2018-12-03 06:23:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-03 06:23:27,255 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:27,255 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] [2018-12-03 06:23:27,256 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:27,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:27,256 INFO L82 PathProgramCache]: Analyzing trace with hash 644534487, now seen corresponding path program 1 times [2018-12-03 06:23:27,256 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:23:27,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:23:27,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:27,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:23:27,257 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:23:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-03 06:23:27,293 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:27,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:23:27,294 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:23:27,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:23:27,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:23:27,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:23:27,294 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2018-12-03 06:23:27,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:27,311 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2018-12-03 06:23:27,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:23:27,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-12-03 06:23:27,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:27,313 INFO L225 Difference]: With dead ends: 89 [2018-12-03 06:23:27,313 INFO L226 Difference]: Without dead ends: 67 [2018-12-03 06:23:27,314 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 [2018-12-03 06:23:27,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-03 06:23:27,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-12-03 06:23:27,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-03 06:23:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-12-03 06:23:27,319 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 42 [2018-12-03 06:23:27,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:27,319 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-12-03 06:23:27,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:23:27,319 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-12-03 06:23:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-03 06:23:27,320 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:27,320 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] [2018-12-03 06:23:27,320 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:27,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:27,321 INFO L82 PathProgramCache]: Analyzing trace with hash 768889016, now seen corresponding path program 1 times [2018-12-03 06:23:27,321 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:23:27,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:23:27,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:27,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:23:27,322 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:23:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-03 06:23:27,364 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:27,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:23:27,365 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:23:27,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:23:27,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:23:27,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:23:27,366 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 4 states. [2018-12-03 06:23:27,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:27,391 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2018-12-03 06:23:27,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:23:27,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2018-12-03 06:23:27,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:27,392 INFO L225 Difference]: With dead ends: 93 [2018-12-03 06:23:27,392 INFO L226 Difference]: Without dead ends: 71 [2018-12-03 06:23:27,393 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 [2018-12-03 06:23:27,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-03 06:23:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-12-03 06:23:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-03 06:23:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-12-03 06:23:27,398 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 45 [2018-12-03 06:23:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:27,398 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-12-03 06:23:27,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:23:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-12-03 06:23:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-03 06:23:27,399 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:27,399 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] [2018-12-03 06:23:27,399 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:27,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:27,399 INFO L82 PathProgramCache]: Analyzing trace with hash 258354839, now seen corresponding path program 1 times [2018-12-03 06:23:27,399 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:23:27,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:23:27,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:27,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:23:27,400 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:23:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-03 06:23:27,425 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:27,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-03 06:23:27,426 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:23:27,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 06:23:27,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 06:23:27,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 06:23:27,426 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 3 states. [2018-12-03 06:23:27,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:27,440 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2018-12-03 06:23:27,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 06:23:27,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2018-12-03 06:23:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:27,441 INFO L225 Difference]: With dead ends: 70 [2018-12-03 06:23:27,441 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 06:23:27,442 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 [2018-12-03 06:23:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 06:23:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-03 06:23:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-03 06:23:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2018-12-03 06:23:27,446 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 45 [2018-12-03 06:23:27,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:27,447 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2018-12-03 06:23:27,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 06:23:27,447 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2018-12-03 06:23:27,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-12-03 06:23:27,448 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:27,448 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] [2018-12-03 06:23:27,448 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:27,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:27,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2126980749, now seen corresponding path program 1 times [2018-12-03 06:23:27,449 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:23:27,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:23:27,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:27,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:23:27,450 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:23:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-03 06:23:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-03 06:23:27,493 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-03 06:23:27,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 06:23:27 BoogieIcfgContainer [2018-12-03 06:23:27,519 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 06:23:27,520 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 06:23:27,520 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 06:23:27,520 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 06:23:27,520 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:23:26" (3/4) ... [2018-12-03 06:23:27,522 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-03 06:23:27,522 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 06:23:27,523 INFO L168 Benchmark]: Toolchain (without parser) took 974.15 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 61.3 MB). Free memory was 955.1 MB in the beginning and 937.3 MB in the end (delta: 17.8 MB). Peak memory consumption was 79.1 MB. Max. memory is 11.5 GB. [2018-12-03 06:23:27,524 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 981.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 06:23:27,524 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.61 ms. Allocated memory is still 1.0 GB. Free memory was 955.1 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-03 06:23:27,524 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.33 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 61.3 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -114.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. [2018-12-03 06:23:27,525 INFO L168 Benchmark]: Boogie Preprocessor took 17.22 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: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. [2018-12-03 06:23:27,525 INFO L168 Benchmark]: RCFGBuilder took 185.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2018-12-03 06:23:27,525 INFO L168 Benchmark]: TraceAbstraction took 574.54 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 937.3 MB in the end (delta: 95.4 MB). Peak memory consumption was 95.4 MB. Max. memory is 11.5 GB. [2018-12-03 06:23:27,526 INFO L168 Benchmark]: Witness Printer took 2.81 ms. Allocated memory is still 1.1 GB. Free memory is still 937.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 06:23:27,527 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 981.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 146.61 ms. Allocated memory is still 1.0 GB. Free memory was 955.1 MB in the beginning and 944.3 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 44.33 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 61.3 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -114.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.22 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: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 185.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 574.54 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 937.3 MB in the end (delta: 95.4 MB). Peak memory consumption was 95.4 MB. Max. memory is 11.5 GB. * Witness Printer took 2.81 ms. Allocated memory is still 1.1 GB. Free memory is still 937.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 75]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 74. Possible FailurePath: [L66] float x = __VERIFIER_nondet_float(); [L67] float y = __VERIFIER_nondet_float(); [L68] CALL, EXPR isnan_float(x) VAL [\old(x)=2139095044] [L57] return x != x; VAL [\old(x)=2139095044, \result=1, x=2139095044] [L68] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, x=2139095044, y=2139095043] [L68] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, x=2139095044, y=2139095043] [L68] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L57] return x != x; VAL [\old(x)=2139095043, \result=0, x=2139095043] [L68] 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] [L68] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095044, y=2139095043] [L68-L69] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) VAL [(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))=1, isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095044, y=2139095043] [L68-L69] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L71] CALL, EXPR fmin_float(x, y) VAL [\old(x)=2139095044, \old(y)=2139095043] [L36] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=2139095044] [L13] __uint32_t w; VAL [\old(x)=2139095044, x=2139095044] [L16] ieee_float_shape_type gf_u; [L17] gf_u.value = (x) [L18] EXPR gf_u.word [L18] (w) = gf_u.word [L21] COND FALSE !(w == 0x00000000 || w == 0x80000000) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L23-L24] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L26-L27] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L29] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L32] return 0; VAL [\old(x)=2139095044, \result=0, w=2139095041, x=2139095044] [L36] RET, EXPR __fpclassify_float(x) VAL [\old(x)=2139095044, \old(y)=2139095043, __fpclassify_float(x)=0, x=2139095044, y=2139095043] [L36] COND TRUE __fpclassify_float(x) == 0 [L37] return y; VAL [\old(x)=2139095044, \old(y)=2139095043, \result=2139095043, x=2139095044, y=2139095043] [L71] RET, EXPR fmin_float(x, y) VAL [fmin_float(x, y)=2139095043, x=2139095044, y=2139095043] [L71] float res = fmin_float(x, y); [L74] CALL, EXPR isnan_float(x) VAL [\old(x)=2139095044] [L57] return x != x; VAL [\old(x)=2139095044, \result=1, x=2139095044] [L74] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, res=2139095043, x=2139095044, y=2139095043] [L74] 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] [L74] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L57] return x != x; VAL [\old(x)=2139095043, \result=0, x=2139095043] [L74] 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] [L74] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=2139095043, x=2139095044, y=2139095043] [L74] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L75] __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 [2018-12-03 06:23:28,862 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 06:23:28,863 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 06:23:28,869 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 06:23:28,869 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 06:23:28,869 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 06:23:28,870 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 06:23:28,871 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 06:23:28,872 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 06:23:28,872 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 06:23:28,872 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 06:23:28,873 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 06:23:28,873 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 06:23:28,874 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 06:23:28,874 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 06:23:28,874 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 06:23:28,875 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 06:23:28,876 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 06:23:28,877 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 06:23:28,877 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 06:23:28,878 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 06:23:28,878 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 06:23:28,880 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 06:23:28,880 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 06:23:28,880 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 06:23:28,880 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 06:23:28,881 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 06:23:28,881 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 06:23:28,882 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 06:23:28,882 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 06:23:28,882 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 06:23:28,883 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 06:23:28,883 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 06:23:28,883 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 06:23:28,883 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 06:23:28,883 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 06:23:28,884 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-12-03 06:23:28,891 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 06:23:28,891 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 06:23:28,892 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 06:23:28,892 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 06:23:28,892 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 06:23:28,892 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 06:23:28,892 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 06:23:28,892 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 06:23:28,892 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 06:23:28,892 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 06:23:28,893 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 06:23:28,893 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 06:23:28,893 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 06:23:28,893 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 06:23:28,893 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 06:23:28,893 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 06:23:28,893 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 06:23:28,893 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-03 06:23:28,893 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-03 06:23:28,894 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 06:23:28,894 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 06:23:28,894 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-03 06:23:28,894 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 06:23:28,894 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 06:23:28,894 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 06:23:28,894 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 06:23:28,894 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 06:23:28,894 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 06:23:28,894 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 06:23:28,895 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 06:23:28,895 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 06:23:28,895 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-03 06:23:28,895 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 06:23:28,895 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-03 06:23:28,895 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-03 06:23:28,895 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_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65a8838494b0fa2a560742eb829642f08a5d8cc8 [2018-12-03 06:23:28,912 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 06:23:28,919 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 06:23:28,921 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 06:23:28,922 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 06:23:28,922 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 06:23:28,923 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-12-03 06:23:28,957 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/data/3bd5c53bb/12d30a9eafc04b7692c8d9ea84a89e0e/FLAG563fddd67 [2018-12-03 06:23:29,348 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 06:23:29,349 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-12-03 06:23:29,355 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/data/3bd5c53bb/12d30a9eafc04b7692c8d9ea84a89e0e/FLAG563fddd67 [2018-12-03 06:23:29,364 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/data/3bd5c53bb/12d30a9eafc04b7692c8d9ea84a89e0e [2018-12-03 06:23:29,365 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 06:23:29,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 06:23:29,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 06:23:29,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 06:23:29,370 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 06:23:29,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 06:23:29" (1/1) ... [2018-12-03 06:23:29,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a0bb1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:29, skipping insertion in model container [2018-12-03 06:23:29,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 06:23:29" (1/1) ... [2018-12-03 06:23:29,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 06:23:29,388 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 06:23:29,498 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 06:23:29,501 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 06:23:29,521 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 06:23:29,538 INFO L195 MainTranslator]: Completed translation [2018-12-03 06:23:29,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:29 WrapperNode [2018-12-03 06:23:29,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 06:23:29,539 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 06:23:29,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 06:23:29,539 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 06:23:29,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:29" (1/1) ... [2018-12-03 06:23:29,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:29" (1/1) ... [2018-12-03 06:23:29,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 06:23:29,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 06:23:29,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 06:23:29,557 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 06:23:29,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:29" (1/1) ... [2018-12-03 06:23:29,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:29" (1/1) ... [2018-12-03 06:23:29,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:29" (1/1) ... [2018-12-03 06:23:29,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:29" (1/1) ... [2018-12-03 06:23:29,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:29" (1/1) ... [2018-12-03 06:23:29,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:29" (1/1) ... [2018-12-03 06:23:29,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:29" (1/1) ... [2018-12-03 06:23:29,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 06:23:29,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 06:23:29,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 06:23:29,583 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 06:23:29,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:29,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 06:23:29,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 06:23:29,646 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-12-03 06:23:29,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-12-03 06:23:29,646 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-12-03 06:23:29,646 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-12-03 06:23:29,646 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2018-12-03 06:23:29,646 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2018-12-03 06:23:29,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 06:23:29,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 06:23:29,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-03 06:23:29,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-12-03 06:23:29,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 06:23:29,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 06:23:29,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2018-12-03 06:23:29,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-03 06:23:29,789 WARN L317 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-03 06:23:29,814 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 06:23:29,814 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-03 06:23:29,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:23:29 BoogieIcfgContainer [2018-12-03 06:23:29,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 06:23:29,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 06:23:29,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 06:23:29,816 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 06:23:29,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 06:23:29" (1/3) ... [2018-12-03 06:23:29,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aea11a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:23:29, skipping insertion in model container [2018-12-03 06:23:29,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:23:29" (2/3) ... [2018-12-03 06:23:29,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aea11a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:23:29, skipping insertion in model container [2018-12-03 06:23:29,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:23:29" (3/3) ... [2018-12-03 06:23:29,818 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231_true-unreach-call.c [2018-12-03 06:23:29,824 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 06:23:29,828 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-12-03 06:23:29,837 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-12-03 06:23:29,855 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-03 06:23:29,856 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 06:23:29,856 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 06:23:29,856 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 06:23:29,856 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 06:23:29,856 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 06:23:29,856 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 06:23:29,856 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 06:23:29,856 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 06:23:29,866 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-12-03 06:23:29,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-03 06:23:29,870 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:29,871 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] [2018-12-03 06:23:29,872 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:29,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:29,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1017347723, now seen corresponding path program 1 times [2018-12-03 06:23:29,878 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:29,878 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:29,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:29,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:23:29,941 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:29,950 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:29,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 06:23:29,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-03 06:23:29,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-03 06:23:29,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-03 06:23:29,961 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-12-03 06:23:29,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:29,976 INFO L93 Difference]: Finished difference Result 105 states and 146 transitions. [2018-12-03 06:23:29,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-03 06:23:29,977 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 35 [2018-12-03 06:23:29,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:29,983 INFO L225 Difference]: With dead ends: 105 [2018-12-03 06:23:29,983 INFO L226 Difference]: Without dead ends: 59 [2018-12-03 06:23:29,985 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 [2018-12-03 06:23:29,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-03 06:23:30,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-03 06:23:30,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-03 06:23:30,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2018-12-03 06:23:30,011 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 35 [2018-12-03 06:23:30,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:30,012 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2018-12-03 06:23:30,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-03 06:23:30,012 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2018-12-03 06:23:30,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-03 06:23:30,013 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:30,013 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] [2018-12-03 06:23:30,014 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:30,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:30,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1223757215, now seen corresponding path program 1 times [2018-12-03 06:23:30,014 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:30,014 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:30,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:30,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:23:30,074 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:30,085 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:30,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:23:30,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:23:30,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:23:30,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:23:30,087 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2018-12-03 06:23:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:30,113 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2018-12-03 06:23:30,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 06:23:30,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-12-03 06:23:30,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:30,114 INFO L225 Difference]: With dead ends: 108 [2018-12-03 06:23:30,114 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 06:23:30,115 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 [2018-12-03 06:23:30,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 06:23:30,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2018-12-03 06:23:30,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-03 06:23:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-12-03 06:23:30,121 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-12-03 06:23:30,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:30,121 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-12-03 06:23:30,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:23:30,121 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-12-03 06:23:30,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-03 06:23:30,122 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:30,122 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] [2018-12-03 06:23:30,122 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:30,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:30,122 INFO L82 PathProgramCache]: Analyzing trace with hash 435900908, now seen corresponding path program 1 times [2018-12-03 06:23:30,122 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:30,123 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:30,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:30,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:23:30,179 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:30,186 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:30,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:23:30,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:23:30,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:23:30,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:23:30,187 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-12-03 06:23:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:30,208 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2018-12-03 06:23:30,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:23:30,209 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-12-03 06:23:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:30,211 INFO L225 Difference]: With dead ends: 86 [2018-12-03 06:23:30,211 INFO L226 Difference]: Without dead ends: 64 [2018-12-03 06:23:30,211 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 [2018-12-03 06:23:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-03 06:23:30,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-12-03 06:23:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 06:23:30,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-03 06:23:30,218 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 41 [2018-12-03 06:23:30,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:30,219 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-03 06:23:30,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:23:30,219 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-03 06:23:30,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-03 06:23:30,220 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:30,220 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] [2018-12-03 06:23:30,221 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:30,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:30,221 INFO L82 PathProgramCache]: Analyzing trace with hash -588522803, now seen corresponding path program 1 times [2018-12-03 06:23:30,221 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:30,222 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:30,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:30,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:23:30,277 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:30,283 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:30,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:23:30,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:23:30,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:23:30,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:23:30,284 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-12-03 06:23:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:30,307 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-03 06:23:30,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:23:30,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-12-03 06:23:30,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:30,309 INFO L225 Difference]: With dead ends: 89 [2018-12-03 06:23:30,309 INFO L226 Difference]: Without dead ends: 67 [2018-12-03 06:23:30,309 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 [2018-12-03 06:23:30,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-03 06:23:30,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-12-03 06:23:30,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 06:23:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-03 06:23:30,317 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 42 [2018-12-03 06:23:30,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:30,317 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-03 06:23:30,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:23:30,317 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-03 06:23:30,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-03 06:23:30,318 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:30,319 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] [2018-12-03 06:23:30,319 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:30,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:30,319 INFO L82 PathProgramCache]: Analyzing trace with hash -545646832, now seen corresponding path program 1 times [2018-12-03 06:23:30,319 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:30,320 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:30,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:30,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:23:30,368 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:30,375 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:30,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:23:30,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:23:30,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:23:30,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:23:30,376 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-12-03 06:23:30,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:30,394 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-03 06:23:30,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:23:30,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-12-03 06:23:30,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:30,395 INFO L225 Difference]: With dead ends: 89 [2018-12-03 06:23:30,395 INFO L226 Difference]: Without dead ends: 67 [2018-12-03 06:23:30,396 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 [2018-12-03 06:23:30,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-03 06:23:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-12-03 06:23:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 06:23:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-03 06:23:30,400 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 43 [2018-12-03 06:23:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:30,400 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-03 06:23:30,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:23:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-03 06:23:30,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-03 06:23:30,401 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:30,401 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] [2018-12-03 06:23:30,401 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:30,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:30,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1776219087, now seen corresponding path program 1 times [2018-12-03 06:23:30,402 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:30,402 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:30,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:30,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:23:30,447 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:30,453 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:30,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:23:30,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:23:30,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:23:30,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:23:30,454 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-12-03 06:23:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:30,471 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-03 06:23:30,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:23:30,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-12-03 06:23:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:30,472 INFO L225 Difference]: With dead ends: 89 [2018-12-03 06:23:30,472 INFO L226 Difference]: Without dead ends: 67 [2018-12-03 06:23:30,473 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 [2018-12-03 06:23:30,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-03 06:23:30,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-12-03 06:23:30,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 06:23:30,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-03 06:23:30,477 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 44 [2018-12-03 06:23:30,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:30,477 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-03 06:23:30,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:23:30,477 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-03 06:23:30,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-03 06:23:30,478 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:30,478 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] [2018-12-03 06:23:30,478 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:30,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:30,478 INFO L82 PathProgramCache]: Analyzing trace with hash -268667278, now seen corresponding path program 1 times [2018-12-03 06:23:30,478 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:30,478 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:30,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:30,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 06:23:30,601 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:23:30,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:23:30,794 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:30,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:30,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-03 06:23:30,836 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:30,850 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-03 06:23:30,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 14 [2018-12-03 06:23:30,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-03 06:23:30,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-03 06:23:30,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-12-03 06:23:30,851 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 14 states. [2018-12-03 06:23:31,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:31,201 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2018-12-03 06:23:31,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 06:23:31,201 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2018-12-03 06:23:31,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:31,202 INFO L225 Difference]: With dead ends: 105 [2018-12-03 06:23:31,203 INFO L226 Difference]: Without dead ends: 91 [2018-12-03 06:23:31,203 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 [2018-12-03 06:23:31,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-12-03 06:23:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2018-12-03 06:23:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-12-03 06:23:31,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2018-12-03 06:23:31,208 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 44 [2018-12-03 06:23:31,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:31,209 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2018-12-03 06:23:31,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-03 06:23:31,209 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2018-12-03 06:23:31,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-03 06:23:31,210 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:31,210 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] [2018-12-03 06:23:31,210 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:31,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:31,210 INFO L82 PathProgramCache]: Analyzing trace with hash 798294838, now seen corresponding path program 1 times [2018-12-03 06:23:31,210 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:31,210 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:31,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:31,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:23:31,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:23:31,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:23:31,768 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:31,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:31,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-03 06:23:32,030 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:23:32,387 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2018-12-03 06:23:32,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11, 11] total 29 [2018-12-03 06:23:32,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-03 06:23:32,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-03 06:23:32,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2018-12-03 06:23:32,388 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand 29 states. [2018-12-03 06:23:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:34,775 INFO L93 Difference]: Finished difference Result 136 states and 179 transitions. [2018-12-03 06:23:34,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-03 06:23:34,777 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 49 [2018-12-03 06:23:34,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:34,779 INFO L225 Difference]: With dead ends: 136 [2018-12-03 06:23:34,779 INFO L226 Difference]: Without dead ends: 134 [2018-12-03 06:23:34,782 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2018-12-03 06:23:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-12-03 06:23:34,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2018-12-03 06:23:34,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 06:23:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2018-12-03 06:23:34,805 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 49 [2018-12-03 06:23:34,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:34,806 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2018-12-03 06:23:34,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-03 06:23:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2018-12-03 06:23:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-03 06:23:34,808 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:34,809 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] [2018-12-03 06:23:34,809 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:34,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:34,809 INFO L82 PathProgramCache]: Analyzing trace with hash 654857827, now seen corresponding path program 1 times [2018-12-03 06:23:34,810 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:34,810 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:34,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:34,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-03 06:23:34,917 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:34,925 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:34,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-03 06:23:34,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 06:23:34,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 06:23:34,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-12-03 06:23:34,926 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand 8 states. [2018-12-03 06:23:35,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:35,174 INFO L93 Difference]: Finished difference Result 158 states and 208 transitions. [2018-12-03 06:23:35,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 06:23:35,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2018-12-03 06:23:35,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:35,175 INFO L225 Difference]: With dead ends: 158 [2018-12-03 06:23:35,175 INFO L226 Difference]: Without dead ends: 105 [2018-12-03 06:23:35,176 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 [2018-12-03 06:23:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-12-03 06:23:35,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2018-12-03 06:23:35,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 06:23:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2018-12-03 06:23:35,183 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 53 [2018-12-03 06:23:35,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:35,183 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2018-12-03 06:23:35,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 06:23:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2018-12-03 06:23:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-03 06:23:35,184 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:35,184 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] [2018-12-03 06:23:35,185 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:35,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:35,185 INFO L82 PathProgramCache]: Analyzing trace with hash -26719360, now seen corresponding path program 1 times [2018-12-03 06:23:35,185 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:35,185 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:35,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:35,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-03 06:23:35,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-03 06:23:35,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:23:35,493 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:35,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:35,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-12-03 06:23:35,523 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:35,538 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-03 06:23:35,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 13 [2018-12-03 06:23:35,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-03 06:23:35,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-03 06:23:35,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-12-03 06:23:35,539 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand 13 states. [2018-12-03 06:23:35,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:35,791 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2018-12-03 06:23:35,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 06:23:35,792 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2018-12-03 06:23:35,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:35,792 INFO L225 Difference]: With dead ends: 110 [2018-12-03 06:23:35,792 INFO L226 Difference]: Without dead ends: 106 [2018-12-03 06:23:35,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-12-03 06:23:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-12-03 06:23:35,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2018-12-03 06:23:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 06:23:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2018-12-03 06:23:35,800 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 58 [2018-12-03 06:23:35,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:35,800 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2018-12-03 06:23:35,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-03 06:23:35,800 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2018-12-03 06:23:35,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-03 06:23:35,801 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:35,801 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] [2018-12-03 06:23:35,801 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:35,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:35,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2129131098, now seen corresponding path program 1 times [2018-12-03 06:23:35,802 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:35,802 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:35,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:35,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-03 06:23:35,851 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:35,858 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:35,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:23:35,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:23:35,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:23:35,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:23:35,859 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand 4 states. [2018-12-03 06:23:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:35,870 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2018-12-03 06:23:35,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:23:35,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2018-12-03 06:23:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:35,871 INFO L225 Difference]: With dead ends: 119 [2018-12-03 06:23:35,871 INFO L226 Difference]: Without dead ends: 92 [2018-12-03 06:23:35,871 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 [2018-12-03 06:23:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-12-03 06:23:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-12-03 06:23:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-03 06:23:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-12-03 06:23:35,878 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 61 [2018-12-03 06:23:35,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:35,878 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-12-03 06:23:35,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:23:35,879 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-12-03 06:23:35,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-12-03 06:23:35,879 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:35,879 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] [2018-12-03 06:23:35,879 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:35,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:35,880 INFO L82 PathProgramCache]: Analyzing trace with hash 660120899, now seen corresponding path program 1 times [2018-12-03 06:23:35,880 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:35,880 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:35,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:35,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-03 06:23:35,928 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:35,935 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:35,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:23:35,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:23:35,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:23:35,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:23:35,936 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 4 states. [2018-12-03 06:23:35,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:35,947 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2018-12-03 06:23:35,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:23:35,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2018-12-03 06:23:35,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:35,948 INFO L225 Difference]: With dead ends: 122 [2018-12-03 06:23:35,948 INFO L226 Difference]: Without dead ends: 95 [2018-12-03 06:23:35,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:23:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-12-03 06:23:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2018-12-03 06:23:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-03 06:23:35,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-12-03 06:23:35,954 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 62 [2018-12-03 06:23:35,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:35,954 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-12-03 06:23:35,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:23:35,954 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-12-03 06:23:35,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-03 06:23:35,955 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:35,955 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] [2018-12-03 06:23:35,955 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:35,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:35,955 INFO L82 PathProgramCache]: Analyzing trace with hash -931228901, now seen corresponding path program 1 times [2018-12-03 06:23:35,955 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:35,956 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:35,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:35,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-12-03 06:23:36,165 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:36,173 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:36,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-12-03 06:23:36,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-03 06:23:36,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-03 06:23:36,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-12-03 06:23:36,174 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 11 states. [2018-12-03 06:23:37,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:37,065 INFO L93 Difference]: Finished difference Result 124 states and 162 transitions. [2018-12-03 06:23:37,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 06:23:37,065 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-12-03 06:23:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:37,066 INFO L225 Difference]: With dead ends: 124 [2018-12-03 06:23:37,066 INFO L226 Difference]: Without dead ends: 122 [2018-12-03 06:23:37,067 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 [2018-12-03 06:23:37,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-12-03 06:23:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2018-12-03 06:23:37,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-03 06:23:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 128 transitions. [2018-12-03 06:23:37,072 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 128 transitions. Word has length 56 [2018-12-03 06:23:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:37,072 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 128 transitions. [2018-12-03 06:23:37,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-03 06:23:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 128 transitions. [2018-12-03 06:23:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-03 06:23:37,073 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:37,073 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] [2018-12-03 06:23:37,073 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:37,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:37,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1062915805, now seen corresponding path program 1 times [2018-12-03 06:23:37,074 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:37,074 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:37,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:37,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-03 06:23:37,257 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:37,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:23:37,416 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:37,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:37,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-03 06:23:37,444 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:37,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 06:23:37,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-03 06:23:37,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 06:23:37,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 06:23:37,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-03 06:23:37,612 INFO L87 Difference]: Start difference. First operand 97 states and 128 transitions. Second operand 8 states. [2018-12-03 06:23:38,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:38,157 INFO L93 Difference]: Finished difference Result 136 states and 173 transitions. [2018-12-03 06:23:38,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 06:23:38,158 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2018-12-03 06:23:38,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:38,158 INFO L225 Difference]: With dead ends: 136 [2018-12-03 06:23:38,158 INFO L226 Difference]: Without dead ends: 116 [2018-12-03 06:23:38,159 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 [2018-12-03 06:23:38,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-12-03 06:23:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 100. [2018-12-03 06:23:38,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-12-03 06:23:38,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 131 transitions. [2018-12-03 06:23:38,164 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 131 transitions. Word has length 56 [2018-12-03 06:23:38,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:38,164 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 131 transitions. [2018-12-03 06:23:38,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 06:23:38,164 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 131 transitions. [2018-12-03 06:23:38,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-03 06:23:38,165 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:38,165 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] [2018-12-03 06:23:38,165 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:38,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:38,165 INFO L82 PathProgramCache]: Analyzing trace with hash -996587585, now seen corresponding path program 1 times [2018-12-03 06:23:38,165 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:38,165 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:38,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:38,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-03 06:23:38,375 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:38,382 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:38,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-12-03 06:23:38,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-03 06:23:38,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-03 06:23:38,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-03 06:23:38,383 INFO L87 Difference]: Start difference. First operand 100 states and 131 transitions. Second operand 9 states. [2018-12-03 06:23:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:38,988 INFO L93 Difference]: Finished difference Result 148 states and 189 transitions. [2018-12-03 06:23:38,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 06:23:38,988 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2018-12-03 06:23:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:38,989 INFO L225 Difference]: With dead ends: 148 [2018-12-03 06:23:38,989 INFO L226 Difference]: Without dead ends: 124 [2018-12-03 06:23:38,989 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 [2018-12-03 06:23:38,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-12-03 06:23:38,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 97. [2018-12-03 06:23:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-03 06:23:38,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2018-12-03 06:23:38,997 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 63 [2018-12-03 06:23:38,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:38,997 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2018-12-03 06:23:38,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-03 06:23:38,997 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2018-12-03 06:23:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-03 06:23:38,997 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:38,998 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] [2018-12-03 06:23:38,998 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:38,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:38,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1505315820, now seen corresponding path program 1 times [2018-12-03 06:23:38,998 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:38,998 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:39,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:39,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-03 06:23:39,043 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:39,050 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:39,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:23:39,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:23:39,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:23:39,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:23:39,051 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 4 states. [2018-12-03 06:23:39,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:39,064 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2018-12-03 06:23:39,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:23:39,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-12-03 06:23:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:39,065 INFO L225 Difference]: With dead ends: 127 [2018-12-03 06:23:39,065 INFO L226 Difference]: Without dead ends: 100 [2018-12-03 06:23:39,065 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 [2018-12-03 06:23:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-12-03 06:23:39,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2018-12-03 06:23:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-03 06:23:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2018-12-03 06:23:39,070 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 56 [2018-12-03 06:23:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:39,070 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2018-12-03 06:23:39,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:23:39,071 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2018-12-03 06:23:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-03 06:23:39,071 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:39,071 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] [2018-12-03 06:23:39,071 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:39,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:39,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1712579960, now seen corresponding path program 1 times [2018-12-03 06:23:39,071 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:39,072 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:39,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:39,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-03 06:23:39,517 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:39,692 WARN L180 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-03 06:23:40,379 WARN L180 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-03 06:23:40,556 WARN L180 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-03 06:23:40,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:23:40,772 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:40,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:40,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:23:40,980 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:41,212 WARN L180 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-03 06:23:41,800 WARN L180 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-03 06:23:42,034 WARN L180 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-03 06:23:42,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 06:23:42,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 17 [2018-12-03 06:23:42,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-03 06:23:42,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-03 06:23:42,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-12-03 06:23:42,134 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 17 states. [2018-12-03 06:23:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:43,689 INFO L93 Difference]: Finished difference Result 154 states and 201 transitions. [2018-12-03 06:23:43,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-03 06:23:43,690 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-12-03 06:23:43,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:43,690 INFO L225 Difference]: With dead ends: 154 [2018-12-03 06:23:43,691 INFO L226 Difference]: Without dead ends: 127 [2018-12-03 06:23:43,691 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2018-12-03 06:23:43,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-12-03 06:23:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2018-12-03 06:23:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-12-03 06:23:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2018-12-03 06:23:43,698 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 63 [2018-12-03 06:23:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:43,698 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2018-12-03 06:23:43,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-03 06:23:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2018-12-03 06:23:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-12-03 06:23:43,699 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:43,699 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] [2018-12-03 06:23:43,699 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:43,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:43,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1665293146, now seen corresponding path program 1 times [2018-12-03 06:23:43,700 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:43,700 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:43,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:43,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-03 06:23:43,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 06:23:44,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:23:44,026 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:44,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:44,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-03 06:23:44,091 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 06:23:44,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:23:44,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 12] total 17 [2018-12-03 06:23:44,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-03 06:23:44,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-03 06:23:44,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-12-03 06:23:44,255 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 17 states. [2018-12-03 06:23:44,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:44,688 INFO L93 Difference]: Finished difference Result 149 states and 192 transitions. [2018-12-03 06:23:44,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 06:23:44,689 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2018-12-03 06:23:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:44,689 INFO L225 Difference]: With dead ends: 149 [2018-12-03 06:23:44,689 INFO L226 Difference]: Without dead ends: 119 [2018-12-03 06:23:44,690 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 [2018-12-03 06:23:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-12-03 06:23:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2018-12-03 06:23:44,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-12-03 06:23:44,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2018-12-03 06:23:44,698 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 64 [2018-12-03 06:23:44,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:44,698 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2018-12-03 06:23:44,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-03 06:23:44,698 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2018-12-03 06:23:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-03 06:23:44,699 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:44,699 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] [2018-12-03 06:23:44,699 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:44,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:44,699 INFO L82 PathProgramCache]: Analyzing trace with hash 2049769800, now seen corresponding path program 1 times [2018-12-03 06:23:44,699 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:44,700 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:44,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:44,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-03 06:23:44,911 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-03 06:23:45,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:23:45,318 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:45,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:45,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-12-03 06:23:45,476 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-03 06:23:45,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:23:45,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16, 14] total 27 [2018-12-03 06:23:45,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-03 06:23:45,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-03 06:23:45,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2018-12-03 06:23:45,935 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand 27 states. [2018-12-03 06:23:47,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:47,154 INFO L93 Difference]: Finished difference Result 154 states and 199 transitions. [2018-12-03 06:23:47,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-03 06:23:47,154 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 57 [2018-12-03 06:23:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:47,155 INFO L225 Difference]: With dead ends: 154 [2018-12-03 06:23:47,155 INFO L226 Difference]: Without dead ends: 152 [2018-12-03 06:23:47,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 198 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 06:23:47,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-12-03 06:23:47,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 111. [2018-12-03 06:23:47,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-12-03 06:23:47,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 148 transitions. [2018-12-03 06:23:47,169 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 148 transitions. Word has length 57 [2018-12-03 06:23:47,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:47,169 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 148 transitions. [2018-12-03 06:23:47,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-03 06:23:47,170 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 148 transitions. [2018-12-03 06:23:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-03 06:23:47,171 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:47,171 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] [2018-12-03 06:23:47,171 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:47,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:47,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1177119311, now seen corresponding path program 1 times [2018-12-03 06:23:47,172 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:47,172 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:47,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:47,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-03 06:23:47,280 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-12-03 06:23:47,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:23:47,477 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:47,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:47,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-03 06:23:47,506 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-12-03 06:23:47,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:23:47,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9] total 13 [2018-12-03 06:23:47,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-03 06:23:47,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-03 06:23:47,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-12-03 06:23:47,638 INFO L87 Difference]: Start difference. First operand 111 states and 148 transitions. Second operand 13 states. [2018-12-03 06:23:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:47,971 INFO L93 Difference]: Finished difference Result 195 states and 246 transitions. [2018-12-03 06:23:47,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 06:23:47,971 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2018-12-03 06:23:47,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:47,972 INFO L225 Difference]: With dead ends: 195 [2018-12-03 06:23:47,972 INFO L226 Difference]: Without dead ends: 113 [2018-12-03 06:23:47,972 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 [2018-12-03 06:23:47,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-12-03 06:23:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 91. [2018-12-03 06:23:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-03 06:23:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2018-12-03 06:23:47,980 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 69 [2018-12-03 06:23:47,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:47,980 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2018-12-03 06:23:47,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-03 06:23:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2018-12-03 06:23:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-03 06:23:47,981 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:47,981 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] [2018-12-03 06:23:47,981 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:47,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:47,981 INFO L82 PathProgramCache]: Analyzing trace with hash 685789633, now seen corresponding path program 1 times [2018-12-03 06:23:47,981 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:47,982 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:47,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:48,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-03 06:23:48,041 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:48,048 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:48,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:23:48,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:23:48,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:23:48,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:23:48,049 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 4 states. [2018-12-03 06:23:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:48,060 INFO L93 Difference]: Finished difference Result 122 states and 153 transitions. [2018-12-03 06:23:48,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:23:48,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-12-03 06:23:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:48,060 INFO L225 Difference]: With dead ends: 122 [2018-12-03 06:23:48,061 INFO L226 Difference]: Without dead ends: 93 [2018-12-03 06:23:48,061 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 [2018-12-03 06:23:48,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-03 06:23:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-12-03 06:23:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 06:23:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2018-12-03 06:23:48,068 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 57 [2018-12-03 06:23:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:48,068 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2018-12-03 06:23:48,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:23:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2018-12-03 06:23:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-03 06:23:48,069 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:48,069 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] [2018-12-03 06:23:48,069 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:48,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:48,069 INFO L82 PathProgramCache]: Analyzing trace with hash 276965408, now seen corresponding path program 1 times [2018-12-03 06:23:48,070 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:48,070 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:48,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:48,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 06:23:48,549 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:48,556 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:48,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2018-12-03 06:23:48,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-03 06:23:48,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-03 06:23:48,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-12-03 06:23:48,557 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 15 states. [2018-12-03 06:23:49,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:49,937 INFO L93 Difference]: Finished difference Result 130 states and 163 transitions. [2018-12-03 06:23:49,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-03 06:23:49,937 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-12-03 06:23:49,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:49,938 INFO L225 Difference]: With dead ends: 130 [2018-12-03 06:23:49,938 INFO L226 Difference]: Without dead ends: 96 [2018-12-03 06:23:49,938 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2018-12-03 06:23:49,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-12-03 06:23:49,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2018-12-03 06:23:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-03 06:23:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2018-12-03 06:23:49,942 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 57 [2018-12-03 06:23:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:49,942 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2018-12-03 06:23:49,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-03 06:23:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2018-12-03 06:23:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-03 06:23:49,943 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:49,943 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] [2018-12-03 06:23:49,943 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:49,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:49,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1068698790, now seen corresponding path program 1 times [2018-12-03 06:23:49,943 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:49,943 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:49,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:49,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-03 06:23:50,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:50,178 WARN L180 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-12-03 06:23:50,343 WARN L180 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-12-03 06:23:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-12-03 06:23:50,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:23:50,471 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:50,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:50,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-03 06:23:50,533 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-12-03 06:23:50,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:23:50,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 9] total 17 [2018-12-03 06:23:50,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-03 06:23:50,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-03 06:23:50,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-12-03 06:23:50,727 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 17 states. [2018-12-03 06:23:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:51,049 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2018-12-03 06:23:51,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-03 06:23:51,050 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2018-12-03 06:23:51,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:51,050 INFO L225 Difference]: With dead ends: 92 [2018-12-03 06:23:51,050 INFO L226 Difference]: Without dead ends: 60 [2018-12-03 06:23:51,050 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 [2018-12-03 06:23:51,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-03 06:23:51,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2018-12-03 06:23:51,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-03 06:23:51,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2018-12-03 06:23:51,053 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 61 [2018-12-03 06:23:51,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:51,053 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2018-12-03 06:23:51,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-03 06:23:51,053 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2018-12-03 06:23:51,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-12-03 06:23:51,053 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:51,053 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] [2018-12-03 06:23:51,053 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:51,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:51,054 INFO L82 PathProgramCache]: Analyzing trace with hash -820099601, now seen corresponding path program 1 times [2018-12-03 06:23:51,054 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:51,054 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:51,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:51,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-03 06:23:51,247 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:51,253 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:51,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-03 06:23:51,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 06:23:51,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 06:23:51,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-03 06:23:51,254 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 12 states. [2018-12-03 06:23:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:51,916 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2018-12-03 06:23:51,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 06:23:51,916 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2018-12-03 06:23:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:51,917 INFO L225 Difference]: With dead ends: 79 [2018-12-03 06:23:51,917 INFO L226 Difference]: Without dead ends: 58 [2018-12-03 06:23:51,917 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 [2018-12-03 06:23:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-03 06:23:51,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-12-03 06:23:51,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-03 06:23:51,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-12-03 06:23:51,919 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 70 [2018-12-03 06:23:51,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:51,920 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-12-03 06:23:51,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 06:23:51,920 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-12-03 06:23:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-12-03 06:23:51,920 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:51,920 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] [2018-12-03 06:23:51,920 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:51,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:51,920 INFO L82 PathProgramCache]: Analyzing trace with hash -429306586, now seen corresponding path program 1 times [2018-12-03 06:23:51,921 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:51,921 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:51,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:51,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-03 06:23:52,164 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:52,171 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:52,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-03 06:23:52,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 06:23:52,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 06:23:52,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-03 06:23:52,172 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 12 states. [2018-12-03 06:23:52,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:52,864 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2018-12-03 06:23:52,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 06:23:52,865 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2018-12-03 06:23:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:52,865 INFO L225 Difference]: With dead ends: 81 [2018-12-03 06:23:52,866 INFO L226 Difference]: Without dead ends: 60 [2018-12-03 06:23:52,866 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 [2018-12-03 06:23:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-03 06:23:52,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2018-12-03 06:23:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-03 06:23:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-12-03 06:23:52,870 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 71 [2018-12-03 06:23:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:52,870 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-12-03 06:23:52,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 06:23:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-12-03 06:23:52,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-12-03 06:23:52,871 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:52,871 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] [2018-12-03 06:23:52,871 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:52,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:52,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1994702002, now seen corresponding path program 1 times [2018-12-03 06:23:52,871 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:52,871 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:52,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:52,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-03 06:23:53,030 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-03 06:23:53,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:23:53,578 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:53,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:53,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-03 06:23:53,637 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:54,064 WARN L180 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-12-03 06:23:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-03 06:23:54,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:23:54,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 17 [2018-12-03 06:23:54,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-03 06:23:54,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-03 06:23:54,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-12-03 06:23:54,107 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 17 states. [2018-12-03 06:23:54,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:54,759 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2018-12-03 06:23:54,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 06:23:54,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-12-03 06:23:54,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:54,760 INFO L225 Difference]: With dead ends: 83 [2018-12-03 06:23:54,760 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 06:23:54,760 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 262 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2018-12-03 06:23:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 06:23:54,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2018-12-03 06:23:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-03 06:23:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-12-03 06:23:54,763 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 71 [2018-12-03 06:23:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:54,764 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-12-03 06:23:54,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-03 06:23:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-12-03 06:23:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-12-03 06:23:54,764 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:54,764 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] [2018-12-03 06:23:54,764 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:54,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:54,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1572781779, now seen corresponding path program 1 times [2018-12-03 06:23:54,765 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:54,765 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:54,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:54,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-03 06:23:55,036 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:55,043 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:55,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-03 06:23:55,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 06:23:55,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 06:23:55,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-03 06:23:55,044 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 12 states. [2018-12-03 06:23:55,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:55,889 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2018-12-03 06:23:55,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 06:23:55,890 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2018-12-03 06:23:55,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:55,890 INFO L225 Difference]: With dead ends: 85 [2018-12-03 06:23:55,890 INFO L226 Difference]: Without dead ends: 64 [2018-12-03 06:23:55,891 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 [2018-12-03 06:23:55,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-03 06:23:55,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2018-12-03 06:23:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-03 06:23:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-12-03 06:23:55,894 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 72 [2018-12-03 06:23:55,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:55,894 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-12-03 06:23:55,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 06:23:55,894 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-12-03 06:23:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-12-03 06:23:55,894 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:55,895 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] [2018-12-03 06:23:55,895 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:55,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:55,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1981385, now seen corresponding path program 1 times [2018-12-03 06:23:55,895 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:55,895 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:55,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:55,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-12-03 06:23:56,055 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-12-03 06:23:56,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:23:56,349 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:56,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:56,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-03 06:23:56,445 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:23:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-12-03 06:23:56,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:23:56,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12, 13] total 22 [2018-12-03 06:23:56,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-03 06:23:56,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-03 06:23:56,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2018-12-03 06:23:56,676 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 22 states. [2018-12-03 06:23:57,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:57,128 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2018-12-03 06:23:57,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 06:23:57,128 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2018-12-03 06:23:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:57,129 INFO L225 Difference]: With dead ends: 78 [2018-12-03 06:23:57,129 INFO L226 Difference]: Without dead ends: 63 [2018-12-03 06:23:57,129 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2018-12-03 06:23:57,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-03 06:23:57,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2018-12-03 06:23:57,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-03 06:23:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2018-12-03 06:23:57,133 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 72 [2018-12-03 06:23:57,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:57,134 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2018-12-03 06:23:57,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-03 06:23:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2018-12-03 06:23:57,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-03 06:23:57,134 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:57,134 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] [2018-12-03 06:23:57,135 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:57,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:57,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1985418442, now seen corresponding path program 1 times [2018-12-03 06:23:57,135 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:57,135 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:57,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:57,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-03 06:23:57,401 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:57,411 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:57,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-03 06:23:57,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 06:23:57,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 06:23:57,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-03 06:23:57,412 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 12 states. [2018-12-03 06:23:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:58,076 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2018-12-03 06:23:58,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 06:23:58,077 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2018-12-03 06:23:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:58,077 INFO L225 Difference]: With dead ends: 78 [2018-12-03 06:23:58,077 INFO L226 Difference]: Without dead ends: 57 [2018-12-03 06:23:58,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-03 06:23:58,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-03 06:23:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2018-12-03 06:23:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-03 06:23:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2018-12-03 06:23:58,081 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 73 [2018-12-03 06:23:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:58,081 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2018-12-03 06:23:58,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 06:23:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2018-12-03 06:23:58,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-03 06:23:58,081 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:23:58,082 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] [2018-12-03 06:23:58,082 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:23:58,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:23:58,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1616447157, now seen corresponding path program 1 times [2018-12-03 06:23:58,082 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:23:58,082 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/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 [2018-12-03 06:23:58,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:23:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:23:58,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:23:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 06:23:58,135 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:23:58,147 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:23:58,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:23:58,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:23:58,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:23:58,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:23:58,147 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 4 states. [2018-12-03 06:23:58,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:23:58,155 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-12-03 06:23:58,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:23:58,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2018-12-03 06:23:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:23:58,155 INFO L225 Difference]: With dead ends: 58 [2018-12-03 06:23:58,156 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 06:23:58,156 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 [2018-12-03 06:23:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 06:23:58,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 06:23:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 06:23:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 06:23:58,157 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2018-12-03 06:23:58,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:23:58,157 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 06:23:58,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:23:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 06:23:58,157 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 06:23:58,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 06:23:58,479 INFO L448 ceAbstractionStarter]: For program point isnan_floatFINAL(line 57) no Hoare annotation was computed. [2018-12-03 06:23:58,479 INFO L451 ceAbstractionStarter]: At program point isnan_floatENTRY(line 57) the Hoare annotation is: true [2018-12-03 06:23:58,479 INFO L448 ceAbstractionStarter]: For program point isnan_floatEXIT(line 57) no Hoare annotation was computed. [2018-12-03 06:23:58,480 INFO L451 ceAbstractionStarter]: At program point fmin_floatENTRY(lines 35 42) the Hoare annotation is: true [2018-12-03 06:23:58,480 INFO L448 ceAbstractionStarter]: For program point fmin_floatEXIT(lines 35 42) no Hoare annotation was computed. [2018-12-03 06:23:58,480 INFO L448 ceAbstractionStarter]: For program point fmin_floatFINAL(lines 35 42) no Hoare annotation was computed. [2018-12-03 06:23:58,480 INFO L448 ceAbstractionStarter]: For program point L41(line 41) no Hoare annotation was computed. [2018-12-03 06:23:58,480 INFO L448 ceAbstractionStarter]: For program point L41-2(line 41) no Hoare annotation was computed. [2018-12-03 06:23:58,480 INFO L444 ceAbstractionStarter]: At program point L38(line 38) the Hoare annotation is: (and (= fmin_float_~x |fmin_float_#in~x|) (= fmin_float_~y |fmin_float_#in~y|)) [2018-12-03 06:23:58,480 INFO L448 ceAbstractionStarter]: For program point L38-1(lines 38 39) no Hoare annotation was computed. [2018-12-03 06:23:58,480 INFO L444 ceAbstractionStarter]: At program point L36(line 36) the Hoare annotation is: (and (= fmin_float_~x |fmin_float_#in~x|) (= fmin_float_~y |fmin_float_#in~y|)) [2018-12-03 06:23:58,480 INFO L448 ceAbstractionStarter]: For program point L36-1(lines 36 37) no Hoare annotation was computed. [2018-12-03 06:23:58,480 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-12-03 06:23:58,480 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-12-03 06:23:58,481 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-03 06:23:58,481 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-03 06:23:58,481 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-03 06:23:58,481 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-03 06:23:58,481 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-03 06:23:58,481 INFO L444 ceAbstractionStarter]: At program point L68-3(line 68) the Hoare annotation is: (and (= (_ bv1 32) |main_#t~ret9|) |main_#t~short11| (not (fp.eq main_~x~0 main_~x~0))) [2018-12-03 06:23:58,481 INFO L448 ceAbstractionStarter]: For program point L68-4(line 68) no Hoare annotation was computed. [2018-12-03 06:23:58,481 INFO L448 ceAbstractionStarter]: For program point L68-6(line 68) no Hoare annotation was computed. [2018-12-03 06:23:58,481 INFO L448 ceAbstractionStarter]: For program point L68-7(lines 68 69) no Hoare annotation was computed. [2018-12-03 06:23:58,481 INFO L448 ceAbstractionStarter]: For program point L68-9(lines 68 84) no Hoare annotation was computed. [2018-12-03 06:23:58,481 INFO L448 ceAbstractionStarter]: For program point L68-11(lines 68 84) no Hoare annotation was computed. [2018-12-03 06:23:58,481 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 59 87) no Hoare annotation was computed. [2018-12-03 06:23:58,482 INFO L448 ceAbstractionStarter]: For program point L81(line 81) no Hoare annotation was computed. [2018-12-03 06:23:58,482 INFO L444 ceAbstractionStarter]: At program point L69(line 69) the Hoare annotation is: (let ((.cse0 (not |main_#t~short11|)) (.cse2 (fp.eq main_~x~0 main_~x~0)) (.cse1 (not |main_#t~short15|))) (or (and .cse0 .cse1 (= (_ bv1 32) |main_#t~ret9|) (= (bvadd |main_#t~ret10| (_ bv4294967295 32)) (_ bv0 32)) (not (fp.eq main_~y~0 main_~y~0)) (not .cse2)) (and .cse0 .cse2 .cse1 (= (_ bv0 32) |main_#t~ret9|)))) [2018-12-03 06:23:58,482 INFO L448 ceAbstractionStarter]: For program point L69-1(line 69) no Hoare annotation was computed. [2018-12-03 06:23:58,482 INFO L448 ceAbstractionStarter]: For program point L69-2(line 69) no Hoare annotation was computed. [2018-12-03 06:23:58,482 INFO L444 ceAbstractionStarter]: At program point L69-3(line 69) the Hoare annotation is: (and |main_#t~short14| (not |main_#t~short11|) (fp.eq main_~x~0 main_~x~0) (not |main_#t~short15|) (= |main_#t~ret12| (_ bv0 32)) (= (_ bv0 32) |main_#t~ret9|)) [2018-12-03 06:23:58,482 INFO L448 ceAbstractionStarter]: For program point L69-4(line 69) no Hoare annotation was computed. [2018-12-03 06:23:58,482 INFO L448 ceAbstractionStarter]: For program point L69-6(line 69) no Hoare annotation was computed. [2018-12-03 06:23:58,482 INFO L448 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 81) no Hoare annotation was computed. [2018-12-03 06:23:58,482 INFO L444 ceAbstractionStarter]: At program point L74(line 74) 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)))) [2018-12-03 06:23:58,482 INFO L448 ceAbstractionStarter]: For program point L74-1(line 74) no Hoare annotation was computed. [2018-12-03 06:23:58,483 INFO L448 ceAbstractionStarter]: For program point L74-2(line 74) no Hoare annotation was computed. [2018-12-03 06:23:58,483 INFO L444 ceAbstractionStarter]: At program point L74-3(line 74) the Hoare annotation is: (and (= main_~y~0 main_~res~0) |main_#t~short19| (= (bvadd |main_#t~ret17| (_ bv4294967295 32)) (_ bv0 32)) (fp.eq main_~y~0 main_~y~0) (not (fp.eq main_~x~0 main_~x~0))) [2018-12-03 06:23:58,483 INFO L448 ceAbstractionStarter]: For program point L74-4(line 74) no Hoare annotation was computed. [2018-12-03 06:23:58,483 INFO L448 ceAbstractionStarter]: For program point L74-6(lines 74 77) no Hoare annotation was computed. [2018-12-03 06:23:58,483 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 75) no Hoare annotation was computed. [2018-12-03 06:23:58,483 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 59 87) no Hoare annotation was computed. [2018-12-03 06:23:58,483 INFO L448 ceAbstractionStarter]: For program point L75(line 75) no Hoare annotation was computed. [2018-12-03 06:23:58,483 INFO L444 ceAbstractionStarter]: At program point L71(line 71) the Hoare annotation is: (let ((.cse1 (fp.eq main_~y~0 main_~y~0)) (.cse0 (fp.eq main_~x~0 main_~x~0))) (or (and .cse0 (not .cse1)) (and .cse1 (not .cse0)))) [2018-12-03 06:23:58,483 INFO L448 ceAbstractionStarter]: For program point L71-1(line 71) no Hoare annotation was computed. [2018-12-03 06:23:58,483 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 59 87) the Hoare annotation is: true [2018-12-03 06:23:58,484 INFO L444 ceAbstractionStarter]: At program point L80(line 80) the Hoare annotation is: (or (and (= main_~x~0 main_~res~0) (not (fp.eq main_~y~0 main_~y~0))) (not (fp.eq main_~x~0 main_~x~0))) [2018-12-03 06:23:58,484 INFO L448 ceAbstractionStarter]: For program point L80-1(line 80) no Hoare annotation was computed. [2018-12-03 06:23:58,484 INFO L448 ceAbstractionStarter]: For program point L80-2(line 80) no Hoare annotation was computed. [2018-12-03 06:23:58,484 INFO L444 ceAbstractionStarter]: At program point L80-3(line 80) the Hoare annotation is: (and (= main_~x~0 main_~res~0) (fp.eq main_~x~0 main_~x~0) |main_#t~short22| (not (fp.eq main_~y~0 main_~y~0))) [2018-12-03 06:23:58,484 INFO L448 ceAbstractionStarter]: For program point L80-4(line 80) no Hoare annotation was computed. [2018-12-03 06:23:58,484 INFO L448 ceAbstractionStarter]: For program point L80-6(lines 80 83) no Hoare annotation was computed. [2018-12-03 06:23:58,484 INFO L451 ceAbstractionStarter]: At program point L68(line 68) the Hoare annotation is: true [2018-12-03 06:23:58,484 INFO L448 ceAbstractionStarter]: For program point L68-1(line 68) no Hoare annotation was computed. [2018-12-03 06:23:58,484 INFO L448 ceAbstractionStarter]: For program point L68-2(line 68) no Hoare annotation was computed. [2018-12-03 06:23:58,484 INFO L448 ceAbstractionStarter]: For program point L29(lines 29 32) no Hoare annotation was computed. [2018-12-03 06:23:58,484 INFO L448 ceAbstractionStarter]: For program point __fpclassify_floatFINAL(lines 12 33) no Hoare annotation was computed. [2018-12-03 06:23:58,484 INFO L448 ceAbstractionStarter]: For program point L23(lines 23 32) no Hoare annotation was computed. [2018-12-03 06:23:58,485 INFO L448 ceAbstractionStarter]: For program point L15-1(lines 15 19) no Hoare annotation was computed. [2018-12-03 06:23:58,485 INFO L444 ceAbstractionStarter]: At program point L15-2(lines 15 19) the Hoare annotation is: (= __fpclassify_float_~x |__fpclassify_float_#in~x|) [2018-12-03 06:23:58,485 INFO L448 ceAbstractionStarter]: For program point L15-3(lines 12 33) no Hoare annotation was computed. [2018-12-03 06:23:58,485 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 32) no Hoare annotation was computed. [2018-12-03 06:23:58,485 INFO L451 ceAbstractionStarter]: At program point __fpclassify_floatENTRY(lines 12 33) the Hoare annotation is: true [2018-12-03 06:23:58,485 INFO L448 ceAbstractionStarter]: For program point __fpclassify_floatEXIT(lines 12 33) no Hoare annotation was computed. [2018-12-03 06:23:58,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 06:23:58 BoogieIcfgContainer [2018-12-03 06:23:58,496 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 06:23:58,496 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 06:23:58,496 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 06:23:58,496 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 06:23:58,497 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:23:29" (3/4) ... [2018-12-03 06:23:58,500 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-03 06:23:58,505 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2018-12-03 06:23:58,506 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fmin_float [2018-12-03 06:23:58,506 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-03 06:23:58,506 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-03 06:23:58,506 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2018-12-03 06:23:58,510 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2018-12-03 06:23:58,510 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-12-03 06:23:58,511 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-03 06:23:58,528 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: x == \old(x) [2018-12-03 06:23:58,544 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_90decfc0-8fd7-47ce-b95e-15cad36292cf/bin-2019/utaipan/witness.graphml [2018-12-03 06:23:58,544 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 06:23:58,544 INFO L168 Benchmark]: Toolchain (without parser) took 29178.88 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 379.1 MB). Free memory was 944.7 MB in the beginning and 801.5 MB in the end (delta: 143.2 MB). Peak memory consumption was 522.3 MB. Max. memory is 11.5 GB. [2018-12-03 06:23:58,545 INFO L168 Benchmark]: CDTParser took 0.12 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. [2018-12-03 06:23:58,545 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.97 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. [2018-12-03 06:23:58,545 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.79 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. [2018-12-03 06:23:58,546 INFO L168 Benchmark]: Boogie Preprocessor took 25.76 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. [2018-12-03 06:23:58,546 INFO L168 Benchmark]: RCFGBuilder took 231.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 928.6 MB in the beginning and 1.1 GB in the end (delta: -176.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-12-03 06:23:58,546 INFO L168 Benchmark]: TraceAbstraction took 28681.29 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 244.3 MB). Free memory was 1.1 GB in the beginning and 801.5 MB in the end (delta: 303.1 MB). Peak memory consumption was 547.4 MB. Max. memory is 11.5 GB. [2018-12-03 06:23:58,547 INFO L168 Benchmark]: Witness Printer took 47.58 ms. Allocated memory is still 1.4 GB. Free memory is still 801.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 06:23:58,548 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 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 171.97 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 17.79 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 25.76 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 231.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 928.6 MB in the beginning and 1.1 GB in the end (delta: -176.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 28681.29 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 244.3 MB). Free memory was 1.1 GB in the beginning and 801.5 MB in the end (delta: 303.1 MB). Peak memory consumption was 547.4 MB. Max. memory is 11.5 GB. * Witness Printer took 47.58 ms. Allocated memory is still 1.4 GB. Free memory is still 801.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 75]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 81]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: x == \old(x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 2 error locations. SAFE Result, 28.6s OverallTime, 30 OverallIterations, 6 TraceHistogramMax, 14.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 2056 SDtfs, 1247 SDslu, 12377 SDs, 0 SdLazy, 6148 SolverSat, 389 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3558 GetRequests, 3160 SyntacticMatches, 16 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 9.4s 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, 320 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 168 PreInvPairs, 193 NumberOfFragments, 164 HoareAnnotationTreeSize, 168 FomulaSimplifications, 23315 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 19 FomulaSimplificationsInter, 55 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 11.4s InterpolantComputationTime, 2393 NumberOfCodeBlocks, 2393 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 3324 ConstructedInterpolants, 35 QuantifiedInterpolants, 632089 SizeOfPredicates, 210 NumberOfNonLiveVariables, 5134 ConjunctsInSsa, 449 ConjunctsInUnsatCore, 57 InterpolantComputations, 22 PerfectInterpolantSequences, 1658/1882 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...