./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash df3954142d6b55c98b13b60b9fbaf053d4d402ff ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash df3954142d6b55c98b13b60b9fbaf053d4d402ff ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 13:33:52,652 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 13:33:52,654 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 13:33:52,662 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 13:33:52,662 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 13:33:52,663 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 13:33:52,663 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 13:33:52,665 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 13:33:52,666 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 13:33:52,666 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 13:33:52,667 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 13:33:52,667 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 13:33:52,668 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 13:33:52,668 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 13:33:52,669 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 13:33:52,669 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 13:33:52,670 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 13:33:52,671 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 13:33:52,672 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 13:33:52,673 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 13:33:52,674 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 13:33:52,674 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 13:33:52,675 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 13:33:52,676 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 13:33:52,676 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 13:33:52,676 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 13:33:52,677 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 13:33:52,677 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 13:33:52,678 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 13:33:52,678 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 13:33:52,679 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 13:33:52,679 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 13:33:52,679 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 13:33:52,679 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 13:33:52,680 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 13:33:52,680 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 13:33:52,681 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 13:33:52,690 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 13:33:52,690 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 13:33:52,691 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 13:33:52,691 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 13:33:52,692 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 13:33:52,692 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 13:33:52,692 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 13:33:52,692 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 13:33:52,692 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 13:33:52,693 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 13:33:52,693 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 13:33:52,693 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 13:33:52,693 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 13:33:52,693 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 13:33:52,693 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 13:33:52,693 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 13:33:52,694 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 13:33:52,694 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 13:33:52,694 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 13:33:52,694 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 13:33:52,694 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 13:33:52,694 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 13:33:52,695 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 13:33:52,695 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:33:52,695 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 13:33:52,695 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 13:33:52,695 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 13:33:52,695 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 13:33:52,695 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 13:33:52,696 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 13:33:52,696 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_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer 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 -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df3954142d6b55c98b13b60b9fbaf053d4d402ff [2018-11-28 13:33:52,720 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 13:33:52,729 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 13:33:52,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 13:33:52,733 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 13:33:52,733 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 13:33:52,733 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-11-28 13:33:52,780 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/data/bb16e3581/2254d3874ff54488bd468997cc455db4/FLAGa8742fff7 [2018-11-28 13:33:53,126 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 13:33:53,126 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-11-28 13:33:53,132 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/data/bb16e3581/2254d3874ff54488bd468997cc455db4/FLAGa8742fff7 [2018-11-28 13:33:53,551 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/data/bb16e3581/2254d3874ff54488bd468997cc455db4 [2018-11-28 13:33:53,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 13:33:53,555 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 13:33:53,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 13:33:53,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 13:33:53,558 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 13:33:53,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:33:53" (1/1) ... [2018-11-28 13:33:53,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@699d1347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:53, skipping insertion in model container [2018-11-28 13:33:53,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:33:53" (1/1) ... [2018-11-28 13:33:53,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 13:33:53,578 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 13:33:53,690 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:33:53,692 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 13:33:53,707 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:33:53,719 INFO L195 MainTranslator]: Completed translation [2018-11-28 13:33:53,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:53 WrapperNode [2018-11-28 13:33:53,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 13:33:53,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 13:33:53,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 13:33:53,720 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 13:33:53,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:53" (1/1) ... [2018-11-28 13:33:53,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:53" (1/1) ... [2018-11-28 13:33:53,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 13:33:53,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 13:33:53,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 13:33:53,737 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 13:33:53,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:53" (1/1) ... [2018-11-28 13:33:53,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:53" (1/1) ... [2018-11-28 13:33:53,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:53" (1/1) ... [2018-11-28 13:33:53,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:53" (1/1) ... [2018-11-28 13:33:53,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:53" (1/1) ... [2018-11-28 13:33:53,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:53" (1/1) ... [2018-11-28 13:33:53,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:53" (1/1) ... [2018-11-28 13:33:53,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 13:33:53,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 13:33:53,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 13:33:53,795 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 13:33:53,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:33:53,826 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 13:33:53,826 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 13:33:53,826 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2018-11-28 13:33:53,826 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2018-11-28 13:33:53,826 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-11-28 13:33:53,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-11-28 13:33:53,826 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-11-28 13:33:53,827 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-11-28 13:33:53,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 13:33:53,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 13:33:53,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2018-11-28 13:33:53,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 13:33:53,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 13:33:53,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 13:33:53,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-28 13:33:53,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 13:33:54,047 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 13:33:54,048 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-11-28 13:33:54,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:33:54 BoogieIcfgContainer [2018-11-28 13:33:54,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 13:33:54,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 13:33:54,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 13:33:54,051 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 13:33:54,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 01:33:53" (1/3) ... [2018-11-28 13:33:54,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247e4961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:33:54, skipping insertion in model container [2018-11-28 13:33:54,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:53" (2/3) ... [2018-11-28 13:33:54,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@247e4961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:33:54, skipping insertion in model container [2018-11-28 13:33:54,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:33:54" (3/3) ... [2018-11-28 13:33:54,054 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251_true-unreach-call.c [2018-11-28 13:33:54,060 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 13:33:54,064 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-11-28 13:33:54,073 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-11-28 13:33:54,092 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 13:33:54,093 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 13:33:54,093 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 13:33:54,093 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 13:33:54,093 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 13:33:54,093 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 13:33:54,093 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 13:33:54,094 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 13:33:54,094 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 13:33:54,106 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2018-11-28 13:33:54,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-28 13:33:54,111 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:54,111 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] [2018-11-28 13:33:54,113 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:54,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:54,116 INFO L82 PathProgramCache]: Analyzing trace with hash 2074573857, now seen corresponding path program 1 times [2018-11-28 13:33:54,117 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:54,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:54,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:54,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:54,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-28 13:33:54,217 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:54,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 13:33:54,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-28 13:33:54,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-28 13:33:54,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 13:33:54,229 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2018-11-28 13:33:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:54,248 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions. [2018-11-28 13:33:54,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 13:33:54,249 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 36 [2018-11-28 13:33:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:54,255 INFO L225 Difference]: With dead ends: 109 [2018-11-28 13:33:54,255 INFO L226 Difference]: Without dead ends: 61 [2018-11-28 13:33:54,257 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 [2018-11-28 13:33:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-28 13:33:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-11-28 13:33:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-28 13:33:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-11-28 13:33:54,289 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-11-28 13:33:54,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:54,291 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-11-28 13:33:54,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-28 13:33:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-11-28 13:33:54,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 13:33:54,293 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:54,294 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] [2018-11-28 13:33:54,294 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:54,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:54,294 INFO L82 PathProgramCache]: Analyzing trace with hash -479509601, now seen corresponding path program 1 times [2018-11-28 13:33:54,294 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:54,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:54,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:54,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:54,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-28 13:33:54,356 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:54,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:33:54,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:33:54,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:33:54,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:33:54,358 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-11-28 13:33:54,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:54,447 INFO L93 Difference]: Finished difference Result 112 states and 147 transitions. [2018-11-28 13:33:54,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:33:54,447 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-11-28 13:33:54,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:54,449 INFO L225 Difference]: With dead ends: 112 [2018-11-28 13:33:54,449 INFO L226 Difference]: Without dead ends: 70 [2018-11-28 13:33:54,450 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 [2018-11-28 13:33:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-11-28 13:33:54,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2018-11-28 13:33:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-28 13:33:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2018-11-28 13:33:54,458 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 37 [2018-11-28 13:33:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:54,459 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2018-11-28 13:33:54,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:33:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2018-11-28 13:33:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-28 13:33:54,460 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:54,460 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] [2018-11-28 13:33:54,460 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:54,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:54,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1695952933, now seen corresponding path program 1 times [2018-11-28 13:33:54,460 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:54,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:54,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:54,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:54,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-28 13:33:54,508 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:54,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:33:54,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:33:54,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:33:54,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:33:54,509 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2018-11-28 13:33:54,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:54,528 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2018-11-28 13:33:54,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:33:54,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-11-28 13:33:54,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:54,531 INFO L225 Difference]: With dead ends: 89 [2018-11-28 13:33:54,531 INFO L226 Difference]: Without dead ends: 67 [2018-11-28 13:33:54,531 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 [2018-11-28 13:33:54,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-28 13:33:54,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-11-28 13:33:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-28 13:33:54,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-11-28 13:33:54,538 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 42 [2018-11-28 13:33:54,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:54,538 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-11-28 13:33:54,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:33:54,539 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-11-28 13:33:54,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-28 13:33:54,540 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:54,540 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] [2018-11-28 13:33:54,540 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:54,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:54,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1516736276, now seen corresponding path program 1 times [2018-11-28 13:33:54,540 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:54,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:54,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:54,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:54,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-28 13:33:54,600 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:54,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:33:54,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:33:54,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:33:54,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:33:54,601 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 4 states. [2018-11-28 13:33:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:54,631 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2018-11-28 13:33:54,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:33:54,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2018-11-28 13:33:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:54,633 INFO L225 Difference]: With dead ends: 93 [2018-11-28 13:33:54,633 INFO L226 Difference]: Without dead ends: 71 [2018-11-28 13:33:54,633 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 [2018-11-28 13:33:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-28 13:33:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-11-28 13:33:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-28 13:33:54,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-11-28 13:33:54,640 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 45 [2018-11-28 13:33:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:54,640 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-11-28 13:33:54,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:33:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-11-28 13:33:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-28 13:33:54,641 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:54,641 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] [2018-11-28 13:33:54,642 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:54,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:54,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1006202099, now seen corresponding path program 1 times [2018-11-28 13:33:54,642 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:54,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:54,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:54,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:54,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-28 13:33:54,675 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:54,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 13:33:54,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 13:33:54,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 13:33:54,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:33:54,677 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 3 states. [2018-11-28 13:33:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:54,697 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2018-11-28 13:33:54,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 13:33:54,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2018-11-28 13:33:54,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:54,698 INFO L225 Difference]: With dead ends: 70 [2018-11-28 13:33:54,699 INFO L226 Difference]: Without dead ends: 68 [2018-11-28 13:33:54,699 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 [2018-11-28 13:33:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-28 13:33:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-11-28 13:33:54,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-28 13:33:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2018-11-28 13:33:54,704 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 45 [2018-11-28 13:33:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:54,705 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2018-11-28 13:33:54,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 13:33:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2018-11-28 13:33:54,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-28 13:33:54,706 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:54,706 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] [2018-11-28 13:33:54,706 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:54,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:54,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1226294786, now seen corresponding path program 1 times [2018-11-28 13:33:54,707 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:33:54,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:33:54,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:54,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:54,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:33:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 13:33:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 13:33:54,758 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 13:33:54,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 01:33:54 BoogieIcfgContainer [2018-11-28 13:33:54,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 13:33:54,782 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 13:33:54,782 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 13:33:54,783 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 13:33:54,783 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:33:54" (3/4) ... [2018-11-28 13:33:54,785 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-28 13:33:54,785 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 13:33:54,786 INFO L168 Benchmark]: Toolchain (without parser) took 1231.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 953.3 MB in the beginning and 1.0 GB in the end (delta: -71.5 MB). Peak memory consumption was 69.0 MB. Max. memory is 11.5 GB. [2018-11-28 13:33:54,787 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:33:54,787 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.22 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-28 13:33:54,787 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.95 ms. Allocated memory is still 1.0 GB. Free memory was 942.5 MB in the beginning and 939.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-28 13:33:54,788 INFO L168 Benchmark]: Boogie Preprocessor took 57.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -189.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. [2018-11-28 13:33:54,788 INFO L168 Benchmark]: RCFGBuilder took 253.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2018-11-28 13:33:54,789 INFO L168 Benchmark]: TraceAbstraction took 733.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 79.9 MB). Peak memory consumption was 79.9 MB. Max. memory is 11.5 GB. [2018-11-28 13:33:54,789 INFO L168 Benchmark]: Witness Printer took 3.00 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:33:54,791 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 164.22 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.95 ms. Allocated memory is still 1.0 GB. Free memory was 942.5 MB in the beginning and 939.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 57.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -189.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. * RCFGBuilder took 253.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 733.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 79.9 MB). Peak memory consumption was 79.9 MB. Max. memory is 11.5 GB. * Witness Printer took 3.00 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 74]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 73. Possible FailurePath: [L64] float x = __VERIFIER_nondet_float(); [L65] float y = __VERIFIER_nondet_float(); [L67] CALL, EXPR isnan_float(x) VAL [\old(x)=2139095044] [L55] return x != x; VAL [\old(x)=2139095044, \result=1, x=2139095044] [L67] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, x=2139095044, y=2139095043] [L67] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, x=2139095044, y=2139095043] [L67] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L55] return x != x; VAL [\old(x)=2139095043, \result=0, x=2139095043] [L67] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095044, y=2139095043] [L67] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095044, y=2139095043] [L67-L68] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) VAL [(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))=1, isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095044, y=2139095043] [L67-L68] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L70] CALL, EXPR fmax_float(x, y) VAL [\old(x)=2139095044, \old(y)=2139095043] [L44] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=2139095044] [L21] __uint32_t w; VAL [\old(x)=2139095044, x=2139095044] [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND FALSE !(w == 0x00000000 || w == 0x80000000) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L31-L32] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L34-L35] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L37] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L40] return 0; VAL [\old(x)=2139095044, \result=0, w=2139095041, x=2139095044] [L44] RET, EXPR __fpclassify_float(x) VAL [\old(x)=2139095044, \old(y)=2139095043, __fpclassify_float(x)=0, x=2139095044, y=2139095043] [L44] COND TRUE __fpclassify_float(x) == 0 [L45] return y; VAL [\old(x)=2139095044, \old(y)=2139095043, \result=2139095043, x=2139095044, y=2139095043] [L70] RET, EXPR fmax_float(x, y) VAL [fmax_float(x, y)=2139095043, x=2139095044, y=2139095043] [L70] float res = fmax_float(x, y); [L73] CALL, EXPR isnan_float(x) VAL [\old(x)=2139095044] [L55] return x != x; VAL [\old(x)=2139095044, \result=1, x=2139095044] [L73] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, res=2139095043, x=2139095044, y=2139095043] [L73] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, res=2139095043, x=2139095044, y=2139095043] [L73] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L55] return x != x; VAL [\old(x)=2139095043, \result=0, x=2139095043] [L73] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=2139095043, x=2139095044, y=2139095043] [L73] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=2139095043, x=2139095044, y=2139095043] [L73] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L74] __VERIFIER_error() VAL [res=2139095043, x=2139095044, y=2139095043] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 66 locations, 2 error locations. UNSAFE Result, 0.6s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.2s 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 0.1.23-0cd3be1 [2018-11-28 13:33:56,282 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 13:33:56,283 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 13:33:56,293 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 13:33:56,293 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 13:33:56,294 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 13:33:56,295 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 13:33:56,296 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 13:33:56,297 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 13:33:56,298 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 13:33:56,298 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 13:33:56,298 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 13:33:56,299 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 13:33:56,300 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 13:33:56,300 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 13:33:56,301 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 13:33:56,302 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 13:33:56,303 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 13:33:56,304 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 13:33:56,305 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 13:33:56,306 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 13:33:56,307 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 13:33:56,309 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 13:33:56,309 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 13:33:56,309 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 13:33:56,310 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 13:33:56,310 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 13:33:56,311 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 13:33:56,311 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 13:33:56,312 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 13:33:56,312 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 13:33:56,313 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 13:33:56,313 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 13:33:56,313 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 13:33:56,314 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 13:33:56,314 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 13:33:56,314 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-11-28 13:33:56,324 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 13:33:56,325 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 13:33:56,325 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 13:33:56,325 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 13:33:56,326 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 13:33:56,326 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 13:33:56,326 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 13:33:56,326 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 13:33:56,327 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 13:33:56,327 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 13:33:56,327 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 13:33:56,327 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 13:33:56,327 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 13:33:56,327 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 13:33:56,327 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-28 13:33:56,328 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-28 13:33:56,328 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 13:33:56,328 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 13:33:56,328 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 13:33:56,328 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 13:33:56,328 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 13:33:56,328 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 13:33:56,329 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 13:33:56,329 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 13:33:56,329 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:33:56,329 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 13:33:56,329 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 13:33:56,329 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 13:33:56,329 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-11-28 13:33:56,330 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 13:33:56,330 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-11-28 13:33:56,330 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-28 13:33:56,330 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_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer 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 -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df3954142d6b55c98b13b60b9fbaf053d4d402ff [2018-11-28 13:33:56,356 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 13:33:56,366 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 13:33:56,369 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 13:33:56,370 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 13:33:56,370 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 13:33:56,371 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-11-28 13:33:56,419 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/data/e15511811/d6713c1d550b48ab90b51030bf274cff/FLAG04bcc7440 [2018-11-28 13:33:56,739 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 13:33:56,739 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-11-28 13:33:56,743 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/data/e15511811/d6713c1d550b48ab90b51030bf274cff/FLAG04bcc7440 [2018-11-28 13:33:57,174 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/data/e15511811/d6713c1d550b48ab90b51030bf274cff [2018-11-28 13:33:57,176 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 13:33:57,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 13:33:57,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 13:33:57,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 13:33:57,181 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 13:33:57,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:33:57" (1/1) ... [2018-11-28 13:33:57,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@465fea7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:57, skipping insertion in model container [2018-11-28 13:33:57,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:33:57" (1/1) ... [2018-11-28 13:33:57,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 13:33:57,205 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 13:33:57,320 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:33:57,325 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 13:33:57,346 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:33:57,364 INFO L195 MainTranslator]: Completed translation [2018-11-28 13:33:57,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:57 WrapperNode [2018-11-28 13:33:57,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 13:33:57,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 13:33:57,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 13:33:57,365 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 13:33:57,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:57" (1/1) ... [2018-11-28 13:33:57,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:57" (1/1) ... [2018-11-28 13:33:57,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 13:33:57,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 13:33:57,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 13:33:57,389 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 13:33:57,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:57" (1/1) ... [2018-11-28 13:33:57,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:57" (1/1) ... [2018-11-28 13:33:57,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:57" (1/1) ... [2018-11-28 13:33:57,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:57" (1/1) ... [2018-11-28 13:33:57,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:57" (1/1) ... [2018-11-28 13:33:57,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:57" (1/1) ... [2018-11-28 13:33:57,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:57" (1/1) ... [2018-11-28 13:33:57,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 13:33:57,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 13:33:57,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 13:33:57,417 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 13:33:57,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:33:57,491 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 13:33:57,491 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 13:33:57,491 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2018-11-28 13:33:57,491 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2018-11-28 13:33:57,491 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-11-28 13:33:57,491 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-11-28 13:33:57,491 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-11-28 13:33:57,491 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-11-28 13:33:57,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 13:33:57,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 13:33:57,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 13:33:57,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-11-28 13:33:57,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 13:33:57,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 13:33:57,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2018-11-28 13:33:57,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 13:33:57,685 WARN L317 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 13:33:57,708 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 13:33:57,708 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-11-28 13:33:57,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:33:57 BoogieIcfgContainer [2018-11-28 13:33:57,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 13:33:57,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 13:33:57,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 13:33:57,712 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 13:33:57,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 01:33:57" (1/3) ... [2018-11-28 13:33:57,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc8984b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:33:57, skipping insertion in model container [2018-11-28 13:33:57,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:33:57" (2/3) ... [2018-11-28 13:33:57,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc8984b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:33:57, skipping insertion in model container [2018-11-28 13:33:57,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:33:57" (3/3) ... [2018-11-28 13:33:57,714 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251_true-unreach-call.c [2018-11-28 13:33:57,720 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 13:33:57,724 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-11-28 13:33:57,735 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-11-28 13:33:57,755 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 13:33:57,755 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 13:33:57,755 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 13:33:57,756 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 13:33:57,756 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 13:33:57,756 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 13:33:57,756 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 13:33:57,756 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 13:33:57,756 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 13:33:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-11-28 13:33:57,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-28 13:33:57,771 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:57,771 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] [2018-11-28 13:33:57,772 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:57,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:57,776 INFO L82 PathProgramCache]: Analyzing trace with hash 127161266, now seen corresponding path program 1 times [2018-11-28 13:33:57,778 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:33:57,779 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-11-28 13:33:57,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:57,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:57,856 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:33:57,868 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:57,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 13:33:57,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-28 13:33:57,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-28 13:33:57,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 13:33:57,880 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-11-28 13:33:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:57,897 INFO L93 Difference]: Finished difference Result 105 states and 146 transitions. [2018-11-28 13:33:57,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 13:33:57,898 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 35 [2018-11-28 13:33:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:57,903 INFO L225 Difference]: With dead ends: 105 [2018-11-28 13:33:57,904 INFO L226 Difference]: Without dead ends: 59 [2018-11-28 13:33:57,906 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 [2018-11-28 13:33:57,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-28 13:33:57,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-11-28 13:33:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-28 13:33:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2018-11-28 13:33:57,941 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 35 [2018-11-28 13:33:57,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:57,942 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2018-11-28 13:33:57,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-28 13:33:57,943 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2018-11-28 13:33:57,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-28 13:33:57,944 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:57,944 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] [2018-11-28 13:33:57,944 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:57,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:57,945 INFO L82 PathProgramCache]: Analyzing trace with hash -788283278, now seen corresponding path program 1 times [2018-11-28 13:33:57,945 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:33:57,945 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-11-28 13:33:57,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:58,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:33:58,033 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:33:58,041 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:58,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:33:58,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:33:58,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:33:58,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:33:58,043 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2018-11-28 13:33:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:58,079 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2018-11-28 13:33:58,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:33:58,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-11-28 13:33:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:58,081 INFO L225 Difference]: With dead ends: 108 [2018-11-28 13:33:58,081 INFO L226 Difference]: Without dead ends: 68 [2018-11-28 13:33:58,082 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 [2018-11-28 13:33:58,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-28 13:33:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2018-11-28 13:33:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-28 13:33:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-11-28 13:33:58,091 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-11-28 13:33:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:58,091 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-11-28 13:33:58,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:33:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-11-28 13:33:58,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 13:33:58,092 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:58,092 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] [2018-11-28 13:33:58,093 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:58,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:58,093 INFO L82 PathProgramCache]: Analyzing trace with hash -728340568, now seen corresponding path program 1 times [2018-11-28 13:33:58,093 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:33:58,094 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-11-28 13:33:58,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:58,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-28 13:33:58,169 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:33:58,180 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:58,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:33:58,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:33:58,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:33:58,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:33:58,181 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-11-28 13:33:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:58,204 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2018-11-28 13:33:58,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:33:58,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-11-28 13:33:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:58,207 INFO L225 Difference]: With dead ends: 86 [2018-11-28 13:33:58,207 INFO L226 Difference]: Without dead ends: 64 [2018-11-28 13:33:58,207 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 [2018-11-28 13:33:58,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-28 13:33:58,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-11-28 13:33:58,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-28 13:33:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-28 13:33:58,214 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 41 [2018-11-28 13:33:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:58,215 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-28 13:33:58,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:33:58,215 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-28 13:33:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-28 13:33:58,216 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:58,216 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] [2018-11-28 13:33:58,216 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:58,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:58,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1290130751, now seen corresponding path program 1 times [2018-11-28 13:33:58,217 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:33:58,217 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-11-28 13:33:58,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:58,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-28 13:33:58,283 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:33:58,293 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:58,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:33:58,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:33:58,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:33:58,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:33:58,294 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-11-28 13:33:58,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:58,310 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-28 13:33:58,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:33:58,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-11-28 13:33:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:58,312 INFO L225 Difference]: With dead ends: 89 [2018-11-28 13:33:58,312 INFO L226 Difference]: Without dead ends: 67 [2018-11-28 13:33:58,312 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 [2018-11-28 13:33:58,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-28 13:33:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-28 13:33:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-28 13:33:58,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-28 13:33:58,320 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 42 [2018-11-28 13:33:58,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:58,320 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-28 13:33:58,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:33:58,320 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-28 13:33:58,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-28 13:33:58,321 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:58,322 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] [2018-11-28 13:33:58,322 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:58,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:58,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1173472140, now seen corresponding path program 1 times [2018-11-28 13:33:58,323 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:33:58,323 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2018-11-28 13:33:58,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:58,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-28 13:33:58,393 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:33:58,404 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:58,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:33:58,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:33:58,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:33:58,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:33:58,405 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-11-28 13:33:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:58,420 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-28 13:33:58,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:33:58,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-11-28 13:33:58,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:58,421 INFO L225 Difference]: With dead ends: 89 [2018-11-28 13:33:58,421 INFO L226 Difference]: Without dead ends: 67 [2018-11-28 13:33:58,422 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 [2018-11-28 13:33:58,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-28 13:33:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-28 13:33:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-28 13:33:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-28 13:33:58,427 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 43 [2018-11-28 13:33:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:58,428 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-28 13:33:58,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:33:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-28 13:33:58,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-28 13:33:58,428 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:58,429 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] [2018-11-28 13:33:58,429 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:58,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:58,429 INFO L82 PathProgramCache]: Analyzing trace with hash -707704861, now seen corresponding path program 1 times [2018-11-28 13:33:58,429 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:33:58,430 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-11-28 13:33:58,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:58,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-28 13:33:58,479 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:33:58,485 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:58,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:33:58,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:33:58,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:33:58,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:33:58,486 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-11-28 13:33:58,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:58,500 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-28 13:33:58,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:33:58,501 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-11-28 13:33:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:58,502 INFO L225 Difference]: With dead ends: 89 [2018-11-28 13:33:58,502 INFO L226 Difference]: Without dead ends: 67 [2018-11-28 13:33:58,502 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 [2018-11-28 13:33:58,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-28 13:33:58,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-28 13:33:58,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-28 13:33:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-28 13:33:58,508 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 44 [2018-11-28 13:33:58,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:58,509 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-28 13:33:58,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:33:58,509 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-28 13:33:58,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-28 13:33:58,510 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:58,510 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] [2018-11-28 13:33:58,510 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:58,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:58,511 INFO L82 PathProgramCache]: Analyzing trace with hash 799846948, now seen corresponding path program 1 times [2018-11-28 13:33:58,511 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:33:58,511 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2018-11-28 13:33:58,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:58,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 13:33:58,677 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 13:33:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-28 13:33:58,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:33:58,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2018-11-28 13:33:58,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 13:33:58,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 13:33:58,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:33:58,933 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 13 states. [2018-11-28 13:33:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:59,295 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2018-11-28 13:33:59,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 13:33:59,295 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2018-11-28 13:33:59,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:59,297 INFO L225 Difference]: With dead ends: 104 [2018-11-28 13:33:59,297 INFO L226 Difference]: Without dead ends: 90 [2018-11-28 13:33:59,297 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2018-11-28 13:33:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-11-28 13:33:59,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2018-11-28 13:33:59,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-11-28 13:33:59,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 101 transitions. [2018-11-28 13:33:59,303 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 101 transitions. Word has length 44 [2018-11-28 13:33:59,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:59,304 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 101 transitions. [2018-11-28 13:33:59,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 13:33:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 101 transitions. [2018-11-28 13:33:59,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-28 13:33:59,305 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:59,305 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, 1] [2018-11-28 13:33:59,305 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:59,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:59,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1279812067, now seen corresponding path program 1 times [2018-11-28 13:33:59,306 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:33:59,306 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2018-11-28 13:33:59,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:59,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-28 13:33:59,407 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:33:59,415 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:59,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-28 13:33:59,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 13:33:59,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 13:33:59,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:33:59,416 INFO L87 Difference]: Start difference. First operand 76 states and 101 transitions. Second operand 8 states. [2018-11-28 13:33:59,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:59,671 INFO L93 Difference]: Finished difference Result 133 states and 174 transitions. [2018-11-28 13:33:59,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:33:59,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2018-11-28 13:33:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:59,673 INFO L225 Difference]: With dead ends: 133 [2018-11-28 13:33:59,673 INFO L226 Difference]: Without dead ends: 89 [2018-11-28 13:33:59,673 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:33:59,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-11-28 13:33:59,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2018-11-28 13:33:59,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-11-28 13:33:59,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2018-11-28 13:33:59,679 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 46 [2018-11-28 13:33:59,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:59,679 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2018-11-28 13:33:59,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 13:33:59,679 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2018-11-28 13:33:59,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-28 13:33:59,680 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:59,680 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] [2018-11-28 13:33:59,681 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:59,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:59,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1644657967, now seen corresponding path program 1 times [2018-11-28 13:33:59,681 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:33:59,681 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2018-11-28 13:33:59,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:59,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-28 13:33:59,730 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:33:59,737 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:33:59,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 13:33:59,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 13:33:59,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 13:33:59,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:33:59,738 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand 3 states. [2018-11-28 13:33:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:33:59,748 INFO L93 Difference]: Finished difference Result 79 states and 103 transitions. [2018-11-28 13:33:59,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 13:33:59,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2018-11-28 13:33:59,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:33:59,749 INFO L225 Difference]: With dead ends: 79 [2018-11-28 13:33:59,749 INFO L226 Difference]: Without dead ends: 77 [2018-11-28 13:33:59,749 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:33:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-11-28 13:33:59,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-11-28 13:33:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-11-28 13:33:59,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2018-11-28 13:33:59,756 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 51 [2018-11-28 13:33:59,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:33:59,756 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2018-11-28 13:33:59,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 13:33:59,757 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2018-11-28 13:33:59,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-28 13:33:59,757 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:33:59,757 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] [2018-11-28 13:33:59,758 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:33:59,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:33:59,758 INFO L82 PathProgramCache]: Analyzing trace with hash 893668260, now seen corresponding path program 1 times [2018-11-28 13:33:59,758 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:33:59,758 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2018-11-28 13:33:59,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:33:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:33:59,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:33:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-28 13:33:59,887 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 13:34:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-28 13:34:00,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:34:00,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2018-11-28 13:34:00,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 13:34:00,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 13:34:00,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:34:00,034 INFO L87 Difference]: Start difference. First operand 77 states and 101 transitions. Second operand 12 states. [2018-11-28 13:34:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:00,312 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2018-11-28 13:34:00,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:34:00,312 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2018-11-28 13:34:00,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:00,313 INFO L225 Difference]: With dead ends: 102 [2018-11-28 13:34:00,313 INFO L226 Difference]: Without dead ends: 86 [2018-11-28 13:34:00,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-11-28 13:34:00,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-11-28 13:34:00,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2018-11-28 13:34:00,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-11-28 13:34:00,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2018-11-28 13:34:00,328 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 56 [2018-11-28 13:34:00,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:00,329 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2018-11-28 13:34:00,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 13:34:00,329 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2018-11-28 13:34:00,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 13:34:00,330 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:00,330 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] [2018-11-28 13:34:00,331 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:00,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:00,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1433909297, now seen corresponding path program 1 times [2018-11-28 13:34:00,332 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:00,332 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:00,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:00,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-28 13:34:00,517 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 13:34:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-28 13:34:00,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:34:00,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2018-11-28 13:34:00,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 13:34:00,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 13:34:00,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2018-11-28 13:34:00,781 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand 19 states. [2018-11-28 13:34:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:01,526 INFO L93 Difference]: Finished difference Result 116 states and 150 transitions. [2018-11-28 13:34:01,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 13:34:01,526 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2018-11-28 13:34:01,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:01,527 INFO L225 Difference]: With dead ends: 116 [2018-11-28 13:34:01,527 INFO L226 Difference]: Without dead ends: 114 [2018-11-28 13:34:01,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2018-11-28 13:34:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-11-28 13:34:01,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2018-11-28 13:34:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-28 13:34:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 115 transitions. [2018-11-28 13:34:01,536 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 115 transitions. Word has length 49 [2018-11-28 13:34:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:01,536 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 115 transitions. [2018-11-28 13:34:01,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 13:34:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 115 transitions. [2018-11-28 13:34:01,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-28 13:34:01,537 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:01,537 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] [2018-11-28 13:34:01,537 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:01,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:01,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1435611684, now seen corresponding path program 1 times [2018-11-28 13:34:01,538 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:01,538 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:01,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:01,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-28 13:34:01,637 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 13:34:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-28 13:34:01,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:34:01,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2018-11-28 13:34:01,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 13:34:01,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 13:34:01,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-11-28 13:34:01,797 INFO L87 Difference]: Start difference. First operand 87 states and 115 transitions. Second operand 14 states. [2018-11-28 13:34:02,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:02,170 INFO L93 Difference]: Finished difference Result 142 states and 182 transitions. [2018-11-28 13:34:02,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 13:34:02,170 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2018-11-28 13:34:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:02,171 INFO L225 Difference]: With dead ends: 142 [2018-11-28 13:34:02,171 INFO L226 Difference]: Without dead ends: 89 [2018-11-28 13:34:02,172 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-11-28 13:34:02,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-11-28 13:34:02,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2018-11-28 13:34:02,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-28 13:34:02,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2018-11-28 13:34:02,179 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 56 [2018-11-28 13:34:02,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:02,180 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2018-11-28 13:34:02,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 13:34:02,180 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2018-11-28 13:34:02,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-28 13:34:02,181 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:02,181 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] [2018-11-28 13:34:02,181 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:02,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:02,182 INFO L82 PathProgramCache]: Analyzing trace with hash 374913712, now seen corresponding path program 1 times [2018-11-28 13:34:02,182 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:02,182 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:02,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:02,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-28 13:34:02,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 13:34:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-28 13:34:02,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:34:02,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2018-11-28 13:34:02,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 13:34:02,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 13:34:02,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:34:02,448 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 12 states. [2018-11-28 13:34:02,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:02,689 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2018-11-28 13:34:02,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 13:34:02,690 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2018-11-28 13:34:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:02,690 INFO L225 Difference]: With dead ends: 92 [2018-11-28 13:34:02,691 INFO L226 Difference]: Without dead ends: 89 [2018-11-28 13:34:02,691 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-11-28 13:34:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-11-28 13:34:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2018-11-28 13:34:02,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-11-28 13:34:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2018-11-28 13:34:02,697 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 58 [2018-11-28 13:34:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:02,697 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2018-11-28 13:34:02,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 13:34:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2018-11-28 13:34:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-28 13:34:02,698 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:02,698 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] [2018-11-28 13:34:02,698 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:02,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:02,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1917965495, now seen corresponding path program 1 times [2018-11-28 13:34:02,698 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:02,699 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:02,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:02,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-28 13:34:02,748 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:34:02,755 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:34:02,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:34:02,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:34:02,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:34:02,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:34:02,756 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand 4 states. [2018-11-28 13:34:02,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:02,769 INFO L93 Difference]: Finished difference Result 116 states and 147 transitions. [2018-11-28 13:34:02,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:34:02,771 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2018-11-28 13:34:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:02,772 INFO L225 Difference]: With dead ends: 116 [2018-11-28 13:34:02,772 INFO L226 Difference]: Without dead ends: 86 [2018-11-28 13:34:02,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:34:02,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-11-28 13:34:02,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-11-28 13:34:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-11-28 13:34:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2018-11-28 13:34:02,778 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 54 [2018-11-28 13:34:02,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:02,778 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2018-11-28 13:34:02,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:34:02,778 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2018-11-28 13:34:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-28 13:34:02,779 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:02,779 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:34:02,779 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:02,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:02,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1403627392, now seen corresponding path program 1 times [2018-11-28 13:34:02,779 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:02,779 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:02,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:02,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-28 13:34:02,834 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:34:02,841 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:34:02,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:34:02,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:34:02,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:34:02,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:34:02,842 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand 4 states. [2018-11-28 13:34:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:02,860 INFO L93 Difference]: Finished difference Result 119 states and 151 transitions. [2018-11-28 13:34:02,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:34:02,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-11-28 13:34:02,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:02,863 INFO L225 Difference]: With dead ends: 119 [2018-11-28 13:34:02,863 INFO L226 Difference]: Without dead ends: 89 [2018-11-28 13:34:02,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:34:02,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-11-28 13:34:02,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2018-11-28 13:34:02,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-11-28 13:34:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2018-11-28 13:34:02,869 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 55 [2018-11-28 13:34:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:02,869 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2018-11-28 13:34:02,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:34:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2018-11-28 13:34:02,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-28 13:34:02,870 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:02,870 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] [2018-11-28 13:34:02,870 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:02,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:02,871 INFO L82 PathProgramCache]: Analyzing trace with hash -235124114, now seen corresponding path program 1 times [2018-11-28 13:34:02,871 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:02,871 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:02,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:02,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-28 13:34:03,055 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 13:34:03,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:34:03,206 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:34:03,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:03,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-28 13:34:03,240 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 13:34:03,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:34:03,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-28 13:34:03,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 13:34:03,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 13:34:03,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-28 13:34:03,375 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand 8 states. [2018-11-28 13:34:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:03,946 INFO L93 Difference]: Finished difference Result 114 states and 142 transitions. [2018-11-28 13:34:03,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:34:03,946 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2018-11-28 13:34:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:03,946 INFO L225 Difference]: With dead ends: 114 [2018-11-28 13:34:03,947 INFO L226 Difference]: Without dead ends: 94 [2018-11-28 13:34:03,947 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:34:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-11-28 13:34:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2018-11-28 13:34:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-28 13:34:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2018-11-28 13:34:03,951 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 56 [2018-11-28 13:34:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:03,952 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2018-11-28 13:34:03,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 13:34:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2018-11-28 13:34:03,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-28 13:34:03,952 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:03,953 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] [2018-11-28 13:34:03,953 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:03,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:03,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2065698476, now seen corresponding path program 1 times [2018-11-28 13:34:03,953 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:03,953 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:03,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:04,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-28 13:34:04,136 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:34:04,143 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:34:04,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-11-28 13:34:04,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 13:34:04,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 13:34:04,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-11-28 13:34:04,144 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand 11 states. [2018-11-28 13:34:04,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:04,661 INFO L93 Difference]: Finished difference Result 124 states and 157 transitions. [2018-11-28 13:34:04,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 13:34:04,662 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-11-28 13:34:04,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:04,662 INFO L225 Difference]: With dead ends: 124 [2018-11-28 13:34:04,662 INFO L226 Difference]: Without dead ends: 122 [2018-11-28 13:34:04,663 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-11-28 13:34:04,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-11-28 13:34:04,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 94. [2018-11-28 13:34:04,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-28 13:34:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2018-11-28 13:34:04,669 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 56 [2018-11-28 13:34:04,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:04,670 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2018-11-28 13:34:04,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 13:34:04,670 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2018-11-28 13:34:04,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-28 13:34:04,671 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:04,671 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] [2018-11-28 13:34:04,671 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:04,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:04,671 INFO L82 PathProgramCache]: Analyzing trace with hash -341505115, now seen corresponding path program 1 times [2018-11-28 13:34:04,671 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:04,672 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:04,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:04,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-28 13:34:04,727 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:34:04,734 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:34:04,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:34:04,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:34:04,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:34:04,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:34:04,735 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand 4 states. [2018-11-28 13:34:04,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:04,748 INFO L93 Difference]: Finished difference Result 127 states and 161 transitions. [2018-11-28 13:34:04,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:34:04,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-11-28 13:34:04,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:04,749 INFO L225 Difference]: With dead ends: 127 [2018-11-28 13:34:04,749 INFO L226 Difference]: Without dead ends: 97 [2018-11-28 13:34:04,750 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 [2018-11-28 13:34:04,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-11-28 13:34:04,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2018-11-28 13:34:04,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-28 13:34:04,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2018-11-28 13:34:04,756 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 56 [2018-11-28 13:34:04,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:04,756 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2018-11-28 13:34:04,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:34:04,756 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2018-11-28 13:34:04,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-28 13:34:04,757 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:04,757 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] [2018-11-28 13:34:04,757 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:04,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:04,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1176443467, now seen corresponding path program 1 times [2018-11-28 13:34:04,758 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:04,758 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:04,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:04,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-28 13:34:05,200 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 13:34:05,452 WARN L180 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-11-28 13:34:05,965 WARN L180 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-11-28 13:34:06,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:34:06,236 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:34:06,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:06,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-28 13:34:06,444 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 13:34:06,634 WARN L180 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-11-28 13:34:07,215 WARN L180 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-11-28 13:34:07,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:34:07,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 17 [2018-11-28 13:34:07,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 13:34:07,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 13:34:07,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-11-28 13:34:07,458 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand 17 states. [2018-11-28 13:34:08,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:08,808 INFO L93 Difference]: Finished difference Result 132 states and 170 transitions. [2018-11-28 13:34:08,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 13:34:08,809 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-11-28 13:34:08,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:08,810 INFO L225 Difference]: With dead ends: 132 [2018-11-28 13:34:08,810 INFO L226 Difference]: Without dead ends: 113 [2018-11-28 13:34:08,811 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2018-11-28 13:34:08,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-11-28 13:34:08,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2018-11-28 13:34:08,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-11-28 13:34:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2018-11-28 13:34:08,821 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 63 [2018-11-28 13:34:08,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:08,822 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2018-11-28 13:34:08,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 13:34:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2018-11-28 13:34:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-28 13:34:08,823 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:08,823 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] [2018-11-28 13:34:08,823 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:08,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:08,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1421130064, now seen corresponding path program 1 times [2018-11-28 13:34:08,823 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:08,823 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 23 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:08,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:08,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-28 13:34:09,041 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 13:34:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-28 13:34:09,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:34:09,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2018-11-28 13:34:09,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 13:34:09,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 13:34:09,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:34:09,238 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand 13 states. [2018-11-28 13:34:09,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:09,530 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2018-11-28 13:34:09,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 13:34:09,530 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2018-11-28 13:34:09,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:09,531 INFO L225 Difference]: With dead ends: 116 [2018-11-28 13:34:09,531 INFO L226 Difference]: Without dead ends: 92 [2018-11-28 13:34:09,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2018-11-28 13:34:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-11-28 13:34:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2018-11-28 13:34:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-28 13:34:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 111 transitions. [2018-11-28 13:34:09,536 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 111 transitions. Word has length 56 [2018-11-28 13:34:09,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:09,537 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 111 transitions. [2018-11-28 13:34:09,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 13:34:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 111 transitions. [2018-11-28 13:34:09,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-28 13:34:09,537 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:09,538 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] [2018-11-28 13:34:09,538 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:09,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:09,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1339205341, now seen corresponding path program 1 times [2018-11-28 13:34:09,538 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:09,538 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:09,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:09,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-28 13:34:09,723 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 13:34:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-28 13:34:10,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:34:10,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-11-28 13:34:10,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 13:34:10,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 13:34:10,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2018-11-28 13:34:10,108 INFO L87 Difference]: Start difference. First operand 88 states and 111 transitions. Second operand 21 states. [2018-11-28 13:34:10,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:10,733 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2018-11-28 13:34:10,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 13:34:10,733 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2018-11-28 13:34:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:10,734 INFO L225 Difference]: With dead ends: 105 [2018-11-28 13:34:10,734 INFO L226 Difference]: Without dead ends: 91 [2018-11-28 13:34:10,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2018-11-28 13:34:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-11-28 13:34:10,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2018-11-28 13:34:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-11-28 13:34:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2018-11-28 13:34:10,738 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 57 [2018-11-28 13:34:10,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:10,739 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2018-11-28 13:34:10,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 13:34:10,739 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2018-11-28 13:34:10,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-28 13:34:10,739 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:10,739 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] [2018-11-28 13:34:10,740 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:10,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:10,740 INFO L82 PathProgramCache]: Analyzing trace with hash -241334884, now seen corresponding path program 1 times [2018-11-28 13:34:10,740 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:10,740 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 25 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:10,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:10,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-28 13:34:10,796 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:34:10,803 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:34:10,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:34:10,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:34:10,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:34:10,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:34:10,804 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand 4 states. [2018-11-28 13:34:10,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:10,814 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2018-11-28 13:34:10,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:34:10,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-11-28 13:34:10,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:10,816 INFO L225 Difference]: With dead ends: 111 [2018-11-28 13:34:10,816 INFO L226 Difference]: Without dead ends: 81 [2018-11-28 13:34:10,817 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 [2018-11-28 13:34:10,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-28 13:34:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2018-11-28 13:34:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-28 13:34:10,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2018-11-28 13:34:10,822 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 57 [2018-11-28 13:34:10,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:10,823 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2018-11-28 13:34:10,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:34:10,823 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2018-11-28 13:34:10,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-28 13:34:10,823 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:10,823 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] [2018-11-28 13:34:10,824 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:10,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:10,824 INFO L82 PathProgramCache]: Analyzing trace with hash -650159109, now seen corresponding path program 1 times [2018-11-28 13:34:10,824 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:10,824 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 26 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:10,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:10,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 13:34:11,300 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:34:11,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:34:11,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2018-11-28 13:34:11,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 13:34:11,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 13:34:11,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-11-28 13:34:11,308 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand 15 states. [2018-11-28 13:34:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:12,438 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2018-11-28 13:34:12,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 13:34:12,438 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-28 13:34:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:12,439 INFO L225 Difference]: With dead ends: 107 [2018-11-28 13:34:12,439 INFO L226 Difference]: Without dead ends: 68 [2018-11-28 13:34:12,439 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 [2018-11-28 13:34:12,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-28 13:34:12,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2018-11-28 13:34:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-28 13:34:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2018-11-28 13:34:12,443 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 57 [2018-11-28 13:34:12,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:12,443 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2018-11-28 13:34:12,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 13:34:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2018-11-28 13:34:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-28 13:34:12,443 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:12,444 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] [2018-11-28 13:34:12,444 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:12,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:12,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1713594914, now seen corresponding path program 1 times [2018-11-28 13:34:12,444 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:12,444 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 27 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:12,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:12,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-28 13:34:12,669 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:34:12,676 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:34:12,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-11-28 13:34:12,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 13:34:12,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 13:34:12,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-28 13:34:12,676 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 9 states. [2018-11-28 13:34:13,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:13,027 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2018-11-28 13:34:13,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 13:34:13,028 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2018-11-28 13:34:13,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:13,028 INFO L225 Difference]: With dead ends: 76 [2018-11-28 13:34:13,028 INFO L226 Difference]: Without dead ends: 57 [2018-11-28 13:34:13,028 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:34:13,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-28 13:34:13,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-11-28 13:34:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-28 13:34:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2018-11-28 13:34:13,031 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 70 [2018-11-28 13:34:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:13,031 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2018-11-28 13:34:13,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 13:34:13,031 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2018-11-28 13:34:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-28 13:34:13,031 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:13,032 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] [2018-11-28 13:34:13,032 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:13,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:13,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1573046304, now seen corresponding path program 1 times [2018-11-28 13:34:13,032 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:13,032 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 28 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:13,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:13,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 13:34:13,223 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:34:13,230 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:34:13,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-28 13:34:13,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 13:34:13,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 13:34:13,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:34:13,231 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 12 states. [2018-11-28 13:34:13,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:13,750 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2018-11-28 13:34:13,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 13:34:13,750 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2018-11-28 13:34:13,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:13,750 INFO L225 Difference]: With dead ends: 79 [2018-11-28 13:34:13,750 INFO L226 Difference]: Without dead ends: 58 [2018-11-28 13:34:13,751 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 [2018-11-28 13:34:13,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-11-28 13:34:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-11-28 13:34:13,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-28 13:34:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-11-28 13:34:13,753 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 70 [2018-11-28 13:34:13,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:13,754 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-11-28 13:34:13,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 13:34:13,754 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-11-28 13:34:13,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-28 13:34:13,754 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:13,754 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] [2018-11-28 13:34:13,755 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:13,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:13,755 INFO L82 PathProgramCache]: Analyzing trace with hash -193580157, now seen corresponding path program 1 times [2018-11-28 13:34:13,755 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:13,755 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 29 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:13,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:13,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 13:34:14,008 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:34:14,019 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:34:14,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-28 13:34:14,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 13:34:14,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 13:34:14,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:34:14,020 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 12 states. [2018-11-28 13:34:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:14,669 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2018-11-28 13:34:14,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 13:34:14,669 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2018-11-28 13:34:14,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:14,670 INFO L225 Difference]: With dead ends: 81 [2018-11-28 13:34:14,670 INFO L226 Difference]: Without dead ends: 60 [2018-11-28 13:34:14,670 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 [2018-11-28 13:34:14,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-28 13:34:14,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2018-11-28 13:34:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-28 13:34:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-11-28 13:34:14,673 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 71 [2018-11-28 13:34:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:14,674 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-11-28 13:34:14,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 13:34:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-11-28 13:34:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-28 13:34:14,674 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:14,674 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] [2018-11-28 13:34:14,674 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:14,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:14,675 INFO L82 PathProgramCache]: Analyzing trace with hash 997969323, now seen corresponding path program 1 times [2018-11-28 13:34:14,675 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:14,675 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 30 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:14,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:14,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-28 13:34:14,853 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 13:34:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-28 13:34:15,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:34:15,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-11-28 13:34:15,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 13:34:15,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 13:34:15,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-11-28 13:34:15,360 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 17 states. [2018-11-28 13:34:15,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:15,945 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2018-11-28 13:34:15,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:34:15,946 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-11-28 13:34:15,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:15,946 INFO L225 Difference]: With dead ends: 83 [2018-11-28 13:34:15,946 INFO L226 Difference]: Without dead ends: 68 [2018-11-28 13:34:15,947 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2018-11-28 13:34:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-28 13:34:15,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2018-11-28 13:34:15,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-11-28 13:34:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-11-28 13:34:15,950 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 71 [2018-11-28 13:34:15,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:15,956 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-11-28 13:34:15,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 13:34:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-11-28 13:34:15,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-28 13:34:15,957 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:15,957 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] [2018-11-28 13:34:15,957 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:15,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:15,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1902363068, now seen corresponding path program 1 times [2018-11-28 13:34:15,958 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:15,958 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/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 [2018-11-28 13:34:15,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:16,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 13:34:16,303 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:34:16,311 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:34:16,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-28 13:34:16,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 13:34:16,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 13:34:16,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:34:16,312 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 12 states. [2018-11-28 13:34:17,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:17,059 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2018-11-28 13:34:17,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 13:34:17,059 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2018-11-28 13:34:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:17,060 INFO L225 Difference]: With dead ends: 85 [2018-11-28 13:34:17,060 INFO L226 Difference]: Without dead ends: 64 [2018-11-28 13:34:17,060 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 [2018-11-28 13:34:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-28 13:34:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2018-11-28 13:34:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-11-28 13:34:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-11-28 13:34:17,064 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 72 [2018-11-28 13:34:17,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:17,064 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-11-28 13:34:17,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 13:34:17,064 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-11-28 13:34:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-28 13:34:17,064 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:17,065 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] [2018-11-28 13:34:17,065 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:17,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:17,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1845453958, now seen corresponding path program 1 times [2018-11-28 13:34:17,065 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:17,065 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 32 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:17,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:17,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-28 13:34:17,222 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-28 13:34:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-28 13:34:17,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:34:17,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-11-28 13:34:17,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 13:34:17,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 13:34:17,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2018-11-28 13:34:17,517 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 17 states. [2018-11-28 13:34:17,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:17,860 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2018-11-28 13:34:17,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 13:34:17,861 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2018-11-28 13:34:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:17,861 INFO L225 Difference]: With dead ends: 78 [2018-11-28 13:34:17,861 INFO L226 Difference]: Without dead ends: 63 [2018-11-28 13:34:17,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2018-11-28 13:34:17,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-28 13:34:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2018-11-28 13:34:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-28 13:34:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2018-11-28 13:34:17,865 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 72 [2018-11-28 13:34:17,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:17,865 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2018-11-28 13:34:17,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 13:34:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2018-11-28 13:34:17,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-28 13:34:17,866 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:17,866 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] [2018-11-28 13:34:17,866 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:17,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:17,866 INFO L82 PathProgramCache]: Analyzing trace with hash -562618969, now seen corresponding path program 1 times [2018-11-28 13:34:17,867 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:17,867 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 33 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:17,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:17,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 13:34:18,067 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:34:18,075 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:34:18,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-28 13:34:18,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 13:34:18,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 13:34:18,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:34:18,075 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 12 states. [2018-11-28 13:34:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:18,582 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2018-11-28 13:34:18,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 13:34:18,582 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2018-11-28 13:34:18,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:18,583 INFO L225 Difference]: With dead ends: 78 [2018-11-28 13:34:18,583 INFO L226 Difference]: Without dead ends: 57 [2018-11-28 13:34:18,584 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-28 13:34:18,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-28 13:34:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2018-11-28 13:34:18,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-28 13:34:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2018-11-28 13:34:18,587 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 73 [2018-11-28 13:34:18,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:18,587 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2018-11-28 13:34:18,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 13:34:18,587 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2018-11-28 13:34:18,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-28 13:34:18,587 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:34:18,588 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] [2018-11-28 13:34:18,588 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:34:18,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:34:18,588 INFO L82 PathProgramCache]: Analyzing trace with hash 130482728, now seen corresponding path program 1 times [2018-11-28 13:34:18,588 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-28 13:34:18,588 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/mathsat Starting monitored process 34 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with mathsat -unsat_core_generation=3 [2018-11-28 13:34:18,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:34:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:34:18,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:34:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-28 13:34:18,643 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-28 13:34:18,650 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:34:18,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:34:18,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:34:18,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:34:18,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:34:18,650 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 4 states. [2018-11-28 13:34:18,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:34:18,655 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-11-28 13:34:18,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:34:18,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2018-11-28 13:34:18,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:34:18,656 INFO L225 Difference]: With dead ends: 58 [2018-11-28 13:34:18,656 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 13:34:18,656 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 [2018-11-28 13:34:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 13:34:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 13:34:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 13:34:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 13:34:18,657 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2018-11-28 13:34:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:34:18,657 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 13:34:18,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:34:18,657 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 13:34:18,657 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 13:34:18,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 13:34:19,045 INFO L448 ceAbstractionStarter]: For program point isnan_floatFINAL(line 55) no Hoare annotation was computed. [2018-11-28 13:34:19,045 INFO L451 ceAbstractionStarter]: At program point isnan_floatENTRY(line 55) the Hoare annotation is: true [2018-11-28 13:34:19,045 INFO L448 ceAbstractionStarter]: For program point isnan_floatEXIT(line 55) no Hoare annotation was computed. [2018-11-28 13:34:19,045 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-11-28 13:34:19,045 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-11-28 13:34:19,046 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 13:34:19,046 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 13:34:19,046 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 13:34:19,046 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 13:34:19,046 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 13:34:19,046 INFO L444 ceAbstractionStarter]: At program point L68-3(line 68) the Hoare annotation is: (and (not |main_#t~short9|) (not |main_#t~short13|) (fp.eq main_~x~0 main_~x~0) (= (_ bv0 32) |main_#t~ret7|) (= |main_#t~ret10| (_ bv0 32)) |main_#t~short12|) [2018-11-28 13:34:19,046 INFO L448 ceAbstractionStarter]: For program point L68-4(line 68) no Hoare annotation was computed. [2018-11-28 13:34:19,046 INFO L448 ceAbstractionStarter]: For program point L68-6(line 68) no Hoare annotation was computed. [2018-11-28 13:34:19,046 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 57 86) no Hoare annotation was computed. [2018-11-28 13:34:19,046 INFO L444 ceAbstractionStarter]: At program point L73(line 73) the Hoare annotation is: (let ((.cse1 (fp.eq main_~x~0 main_~x~0)) (.cse0 (fp.eq main_~y~0 main_~y~0))) (or (and (and (= main_~y~0 main_~res~0) .cse0) (not .cse1)) (and (= main_~x~0 main_~res~0) .cse1 (not .cse0)))) [2018-11-28 13:34:19,046 INFO L448 ceAbstractionStarter]: For program point L73-1(line 73) no Hoare annotation was computed. [2018-11-28 13:34:19,046 INFO L448 ceAbstractionStarter]: For program point L73-2(line 73) no Hoare annotation was computed. [2018-11-28 13:34:19,046 INFO L444 ceAbstractionStarter]: At program point L73-3(line 73) the Hoare annotation is: (and (= main_~y~0 main_~res~0) |main_#t~short17| (fp.eq main_~y~0 main_~y~0) (not (fp.eq main_~x~0 main_~x~0))) [2018-11-28 13:34:19,046 INFO L448 ceAbstractionStarter]: For program point L73-4(line 73) no Hoare annotation was computed. [2018-11-28 13:34:19,046 INFO L448 ceAbstractionStarter]: For program point L73-6(lines 73 76) no Hoare annotation was computed. [2018-11-28 13:34:19,046 INFO L448 ceAbstractionStarter]: For program point L74(line 74) no Hoare annotation was computed. [2018-11-28 13:34:19,046 INFO L444 ceAbstractionStarter]: At program point L70(line 70) the Hoare annotation is: (let ((.cse1 (fp.eq main_~y~0 main_~y~0)) (.cse0 (fp.eq main_~x~0 main_~x~0))) (or (and .cse0 (not .cse1)) (and .cse1 (not .cse0)))) [2018-11-28 13:34:19,046 INFO L448 ceAbstractionStarter]: For program point L70-1(line 70) no Hoare annotation was computed. [2018-11-28 13:34:19,046 INFO L448 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 80) no Hoare annotation was computed. [2018-11-28 13:34:19,046 INFO L444 ceAbstractionStarter]: At program point L79(line 79) the Hoare annotation is: (or (and (= main_~x~0 main_~res~0) (not (fp.eq main_~y~0 main_~y~0))) (not (fp.eq main_~x~0 main_~x~0))) [2018-11-28 13:34:19,047 INFO L448 ceAbstractionStarter]: For program point L79-1(line 79) no Hoare annotation was computed. [2018-11-28 13:34:19,047 INFO L448 ceAbstractionStarter]: For program point L79-2(line 79) no Hoare annotation was computed. [2018-11-28 13:34:19,047 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 57 86) no Hoare annotation was computed. [2018-11-28 13:34:19,047 INFO L444 ceAbstractionStarter]: At program point L79-3(line 79) the Hoare annotation is: (and (= main_~x~0 main_~res~0) (fp.eq main_~x~0 main_~x~0) |main_#t~short20| (not (fp.eq main_~y~0 main_~y~0))) [2018-11-28 13:34:19,047 INFO L448 ceAbstractionStarter]: For program point L79-4(line 79) no Hoare annotation was computed. [2018-11-28 13:34:19,047 INFO L448 ceAbstractionStarter]: For program point L79-6(lines 79 82) no Hoare annotation was computed. [2018-11-28 13:34:19,047 INFO L451 ceAbstractionStarter]: At program point L67(line 67) the Hoare annotation is: true [2018-11-28 13:34:19,047 INFO L448 ceAbstractionStarter]: For program point L67-1(line 67) no Hoare annotation was computed. [2018-11-28 13:34:19,047 INFO L448 ceAbstractionStarter]: For program point L67-2(line 67) no Hoare annotation was computed. [2018-11-28 13:34:19,047 INFO L444 ceAbstractionStarter]: At program point L67-3(line 67) the Hoare annotation is: (and (= (_ bv1 32) |main_#t~ret7|) |main_#t~short9| (not (fp.eq main_~x~0 main_~x~0))) [2018-11-28 13:34:19,047 INFO L448 ceAbstractionStarter]: For program point L67-4(line 67) no Hoare annotation was computed. [2018-11-28 13:34:19,047 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 57 86) the Hoare annotation is: true [2018-11-28 13:34:19,047 INFO L448 ceAbstractionStarter]: For program point L67-6(line 67) no Hoare annotation was computed. [2018-11-28 13:34:19,047 INFO L448 ceAbstractionStarter]: For program point L67-7(lines 67 68) no Hoare annotation was computed. [2018-11-28 13:34:19,047 INFO L448 ceAbstractionStarter]: For program point L67-9(lines 67 83) no Hoare annotation was computed. [2018-11-28 13:34:19,047 INFO L448 ceAbstractionStarter]: For program point L67-11(lines 67 83) no Hoare annotation was computed. [2018-11-28 13:34:19,047 INFO L448 ceAbstractionStarter]: For program point L80(line 80) no Hoare annotation was computed. [2018-11-28 13:34:19,047 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 74) no Hoare annotation was computed. [2018-11-28 13:34:19,047 INFO L444 ceAbstractionStarter]: At program point L68(line 68) the Hoare annotation is: (let ((.cse2 (fp.eq main_~x~0 main_~x~0)) (.cse0 (not |main_#t~short9|)) (.cse1 (not |main_#t~short13|))) (or (and .cse0 .cse1 .cse2 (= (_ bv0 32) |main_#t~ret7|)) (and (and (= (_ bv1 32) |main_#t~ret7|) (not .cse2)) (= (bvadd |main_#t~ret8| (_ bv4294967295 32)) (_ bv0 32)) .cse0 .cse1 (not (fp.eq main_~y~0 main_~y~0))))) [2018-11-28 13:34:19,047 INFO L448 ceAbstractionStarter]: For program point L68-1(line 68) no Hoare annotation was computed. [2018-11-28 13:34:19,048 INFO L448 ceAbstractionStarter]: For program point L68-2(line 68) no Hoare annotation was computed. [2018-11-28 13:34:19,048 INFO L448 ceAbstractionStarter]: For program point fmax_floatEXIT(lines 43 52) no Hoare annotation was computed. [2018-11-28 13:34:19,048 INFO L451 ceAbstractionStarter]: At program point fmax_floatENTRY(lines 43 52) the Hoare annotation is: true [2018-11-28 13:34:19,048 INFO L448 ceAbstractionStarter]: For program point L51(line 51) no Hoare annotation was computed. [2018-11-28 13:34:19,048 INFO L448 ceAbstractionStarter]: For program point L51-2(line 51) no Hoare annotation was computed. [2018-11-28 13:34:19,048 INFO L444 ceAbstractionStarter]: At program point L48(line 48) the Hoare annotation is: (and (= |fmax_float_#in~y| fmax_float_~y) (= |fmax_float_#in~x| fmax_float_~x)) [2018-11-28 13:34:19,048 INFO L448 ceAbstractionStarter]: For program point L48-1(lines 48 50) no Hoare annotation was computed. [2018-11-28 13:34:19,048 INFO L444 ceAbstractionStarter]: At program point L44(line 44) the Hoare annotation is: (and (= |fmax_float_#in~y| fmax_float_~y) (= |fmax_float_#in~x| fmax_float_~x)) [2018-11-28 13:34:19,048 INFO L448 ceAbstractionStarter]: For program point L44-1(lines 44 46) no Hoare annotation was computed. [2018-11-28 13:34:19,048 INFO L448 ceAbstractionStarter]: For program point fmax_floatFINAL(lines 43 52) no Hoare annotation was computed. [2018-11-28 13:34:19,048 INFO L448 ceAbstractionStarter]: For program point L31(lines 31 40) no Hoare annotation was computed. [2018-11-28 13:34:19,048 INFO L448 ceAbstractionStarter]: For program point __fpclassify_floatFINAL(lines 20 41) no Hoare annotation was computed. [2018-11-28 13:34:19,048 INFO L448 ceAbstractionStarter]: For program point L23-1(lines 23 27) no Hoare annotation was computed. [2018-11-28 13:34:19,048 INFO L444 ceAbstractionStarter]: At program point L23-2(lines 23 27) the Hoare annotation is: (= __fpclassify_float_~x |__fpclassify_float_#in~x|) [2018-11-28 13:34:19,048 INFO L448 ceAbstractionStarter]: For program point L23-3(lines 20 41) no Hoare annotation was computed. [2018-11-28 13:34:19,048 INFO L448 ceAbstractionStarter]: For program point L34(lines 34 40) no Hoare annotation was computed. [2018-11-28 13:34:19,048 INFO L451 ceAbstractionStarter]: At program point __fpclassify_floatENTRY(lines 20 41) the Hoare annotation is: true [2018-11-28 13:34:19,048 INFO L448 ceAbstractionStarter]: For program point __fpclassify_floatEXIT(lines 20 41) no Hoare annotation was computed. [2018-11-28 13:34:19,048 INFO L448 ceAbstractionStarter]: For program point L37(lines 37 40) no Hoare annotation was computed. [2018-11-28 13:34:19,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 01:34:19 BoogieIcfgContainer [2018-11-28 13:34:19,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 13:34:19,056 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 13:34:19,056 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 13:34:19,057 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 13:34:19,057 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:33:57" (3/4) ... [2018-11-28 13:34:19,059 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 13:34:19,063 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2018-11-28 13:34:19,063 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 13:34:19,063 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 13:34:19,064 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fmax_float [2018-11-28 13:34:19,064 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2018-11-28 13:34:19,067 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2018-11-28 13:34:19,067 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-11-28 13:34:19,067 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 13:34:19,084 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: x == \old(x) [2018-11-28 13:34:19,105 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_1e14f793-1d92-4131-a45c-9d1bee0adcde/bin-2019/uautomizer/witness.graphml [2018-11-28 13:34:19,106 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 13:34:19,106 INFO L168 Benchmark]: Toolchain (without parser) took 21929.56 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 346.6 MB). Free memory was 943.4 MB in the beginning and 952.7 MB in the end (delta: -9.3 MB). Peak memory consumption was 337.2 MB. Max. memory is 11.5 GB. [2018-11-28 13:34:19,107 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:34:19,107 INFO L168 Benchmark]: CACSL2BoogieTranslator took 186.54 ms. Allocated memory is still 1.0 GB. Free memory was 943.4 MB in the beginning and 932.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 13:34:19,107 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.67 ms. Allocated memory is still 1.0 GB. Free memory was 932.6 MB in the beginning and 927.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-28 13:34:19,108 INFO L168 Benchmark]: Boogie Preprocessor took 27.90 ms. Allocated memory is still 1.0 GB. Free memory is still 927.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:34:19,108 INFO L168 Benchmark]: RCFGBuilder took 291.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.2 MB). Free memory was 927.3 MB in the beginning and 1.1 GB in the end (delta: -166.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 11.5 GB. [2018-11-28 13:34:19,108 INFO L168 Benchmark]: TraceAbstraction took 21347.10 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 223.3 MB). Free memory was 1.1 GB in the beginning and 962.8 MB in the end (delta: 130.9 MB). Peak memory consumption was 354.2 MB. Max. memory is 11.5 GB. [2018-11-28 13:34:19,108 INFO L168 Benchmark]: Witness Printer took 49.26 ms. Allocated memory is still 1.4 GB. Free memory was 962.8 MB in the beginning and 952.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 11.5 GB. [2018-11-28 13:34:19,110 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 186.54 ms. Allocated memory is still 1.0 GB. Free memory was 943.4 MB in the beginning and 932.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.67 ms. Allocated memory is still 1.0 GB. Free memory was 932.6 MB in the beginning and 927.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.90 ms. Allocated memory is still 1.0 GB. Free memory is still 927.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 291.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.2 MB). Free memory was 927.3 MB in the beginning and 1.1 GB in the end (delta: -166.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 21347.10 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 223.3 MB). Free memory was 1.1 GB in the beginning and 962.8 MB in the end (delta: 130.9 MB). Peak memory consumption was 354.2 MB. Max. memory is 11.5 GB. * Witness Printer took 49.26 ms. Allocated memory is still 1.4 GB. Free memory was 962.8 MB in the beginning and 952.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 74]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 80]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: x == \old(x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 2 error locations. SAFE Result, 21.2s OverallTime, 31 OverallIterations, 6 TraceHistogramMax, 10.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 2086 SDtfs, 1000 SDslu, 10841 SDs, 0 SdLazy, 4853 SolverSat, 239 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2538 GetRequests, 2194 SyntacticMatches, 8 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred 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, 31 MinimizatonAttempts, 189 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 156 PreInvPairs, 178 NumberOfFragments, 161 HoareAnnotationTreeSize, 156 FomulaSimplifications, 869 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 19 FomulaSimplificationsInter, 104 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 8.1s InterpolantComputationTime, 1859 NumberOfCodeBlocks, 1859 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 2336 ConstructedInterpolants, 35 QuantifiedInterpolants, 443305 SizeOfPredicates, 148 NumberOfNonLiveVariables, 4006 ConjunctsInSsa, 328 ConjunctsInUnsatCore, 42 InterpolantComputations, 20 PerfectInterpolantSequences, 1085/1205 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...