./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash df3954142d6b55c98b13b60b9fbaf053d4d402ff ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash df3954142d6b55c98b13b60b9fbaf053d4d402ff .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-03 06:13:07,288 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 06:13:07,289 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 06:13:07,297 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 06:13:07,297 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 06:13:07,297 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 06:13:07,298 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 06:13:07,299 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 06:13:07,300 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 06:13:07,300 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 06:13:07,301 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 06:13:07,301 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 06:13:07,301 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 06:13:07,302 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 06:13:07,302 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 06:13:07,302 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 06:13:07,303 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 06:13:07,304 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 06:13:07,305 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 06:13:07,305 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 06:13:07,306 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 06:13:07,306 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 06:13:07,308 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 06:13:07,308 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 06:13:07,308 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 06:13:07,308 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 06:13:07,309 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 06:13:07,309 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 06:13:07,309 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 06:13:07,310 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 06:13:07,310 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 06:13:07,310 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 06:13:07,311 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 06:13:07,311 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 06:13:07,311 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 06:13:07,311 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 06:13:07,312 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-03 06:13:07,319 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 06:13:07,319 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 06:13:07,319 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 06:13:07,319 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 06:13:07,319 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 06:13:07,320 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 06:13:07,320 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 06:13:07,320 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 06:13:07,320 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 06:13:07,320 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 06:13:07,320 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 06:13:07,320 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-03 06:13:07,320 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 06:13:07,320 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 06:13:07,321 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 06:13:07,321 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 06:13:07,321 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 06:13:07,321 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 06:13:07,321 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 06:13:07,321 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 06:13:07,321 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 06:13:07,321 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 06:13:07,321 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 06:13:07,321 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 06:13:07,321 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 06:13:07,321 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 06:13:07,321 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 06:13:07,322 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 06:13:07,322 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 06:13:07,322 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 06:13:07,322 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 06:13:07,322 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 06:13:07,322 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 06:13:07,322 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 06:13:07,322 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 06:13:07,322 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 06:13:07,322 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df3954142d6b55c98b13b60b9fbaf053d4d402ff [2018-12-03 06:13:07,339 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 06:13:07,346 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 06:13:07,348 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 06:13:07,349 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 06:13:07,349 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 06:13:07,350 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-12-03 06:13:07,385 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/data/917b86271/6a026b7179004c9b8a6c3e3609dcde58/FLAG1082937d0 [2018-12-03 06:13:07,817 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 06:13:07,818 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-12-03 06:13:07,821 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/data/917b86271/6a026b7179004c9b8a6c3e3609dcde58/FLAG1082937d0 [2018-12-03 06:13:07,830 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/data/917b86271/6a026b7179004c9b8a6c3e3609dcde58 [2018-12-03 06:13:07,832 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 06:13:07,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 06:13:07,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 06:13:07,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 06:13:07,835 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 06:13:07,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 06:13:07" (1/1) ... [2018-12-03 06:13:07,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e9f86c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:07, skipping insertion in model container [2018-12-03 06:13:07,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 06:13:07" (1/1) ... [2018-12-03 06:13:07,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 06:13:07,852 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 06:13:07,945 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 06:13:07,947 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 06:13:07,963 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 06:13:07,975 INFO L195 MainTranslator]: Completed translation [2018-12-03 06:13:07,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:07 WrapperNode [2018-12-03 06:13:07,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 06:13:07,976 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 06:13:07,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 06:13:07,976 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 06:13:07,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:07" (1/1) ... [2018-12-03 06:13:07,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:07" (1/1) ... [2018-12-03 06:13:07,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 06:13:07,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 06:13:07,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 06:13:07,991 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 06:13:08,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:07" (1/1) ... [2018-12-03 06:13:08,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:07" (1/1) ... [2018-12-03 06:13:08,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:07" (1/1) ... [2018-12-03 06:13:08,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:07" (1/1) ... [2018-12-03 06:13:08,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:07" (1/1) ... [2018-12-03 06:13:08,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:07" (1/1) ... [2018-12-03 06:13:08,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:07" (1/1) ... [2018-12-03 06:13:08,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 06:13:08,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 06:13:08,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 06:13:08,047 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 06:13:08,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 06:13:08,077 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 06:13:08,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 06:13:08,077 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2018-12-03 06:13:08,078 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2018-12-03 06:13:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-12-03 06:13:08,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-12-03 06:13:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-12-03 06:13:08,078 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-12-03 06:13:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 06:13:08,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 06:13:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2018-12-03 06:13:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-03 06:13:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 06:13:08,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 06:13:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-03 06:13:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-03 06:13:08,245 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 06:13:08,245 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-03 06:13:08,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:13:08 BoogieIcfgContainer [2018-12-03 06:13:08,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 06:13:08,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 06:13:08,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 06:13:08,248 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 06:13:08,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 06:13:07" (1/3) ... [2018-12-03 06:13:08,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a78812e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:13:08, skipping insertion in model container [2018-12-03 06:13:08,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:07" (2/3) ... [2018-12-03 06:13:08,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a78812e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:13:08, skipping insertion in model container [2018-12-03 06:13:08,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:13:08" (3/3) ... [2018-12-03 06:13:08,250 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251_true-unreach-call.c [2018-12-03 06:13:08,257 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 06:13:08,261 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-12-03 06:13:08,270 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-12-03 06:13:08,287 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 06:13:08,287 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 06:13:08,287 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 06:13:08,287 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 06:13:08,287 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 06:13:08,287 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 06:13:08,287 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 06:13:08,287 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 06:13:08,298 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2018-12-03 06:13:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-03 06:13:08,303 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:08,303 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:08,305 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:08,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:08,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2074573857, now seen corresponding path program 1 times [2018-12-03 06:13:08,309 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:13:08,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:13:08,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:08,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:13:08,336 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:13:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:13:08,403 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:08,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 06:13:08,403 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:13:08,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-03 06:13:08,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-03 06:13:08,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-03 06:13:08,415 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2018-12-03 06:13:08,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:08,430 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions. [2018-12-03 06:13:08,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-03 06:13:08,431 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 36 [2018-12-03 06:13:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:08,436 INFO L225 Difference]: With dead ends: 109 [2018-12-03 06:13:08,437 INFO L226 Difference]: Without dead ends: 61 [2018-12-03 06:13:08,438 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-03 06:13:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-03 06:13:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-12-03 06:13:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-03 06:13:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-12-03 06:13:08,464 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-12-03 06:13:08,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:08,465 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-12-03 06:13:08,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-03 06:13:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-12-03 06:13:08,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-03 06:13:08,467 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:08,467 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:08,467 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:08,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:08,467 INFO L82 PathProgramCache]: Analyzing trace with hash -479509601, now seen corresponding path program 1 times [2018-12-03 06:13:08,467 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:13:08,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:13:08,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:08,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:13:08,468 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:13:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:13:08,515 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:08,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:13:08,515 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:13:08,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:13:08,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:13:08,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:08,517 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-12-03 06:13:08,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:08,559 INFO L93 Difference]: Finished difference Result 112 states and 147 transitions. [2018-12-03 06:13:08,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 06:13:08,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-12-03 06:13:08,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:08,560 INFO L225 Difference]: With dead ends: 112 [2018-12-03 06:13:08,560 INFO L226 Difference]: Without dead ends: 70 [2018-12-03 06:13:08,561 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-03 06:13:08,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-03 06:13:08,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2018-12-03 06:13:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-03 06:13:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2018-12-03 06:13:08,567 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 37 [2018-12-03 06:13:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:08,567 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2018-12-03 06:13:08,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:13:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2018-12-03 06:13:08,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-03 06:13:08,568 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:08,568 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:08,568 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:08,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:08,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1695952933, now seen corresponding path program 1 times [2018-12-03 06:13:08,569 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:13:08,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:13:08,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:08,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:13:08,569 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:13:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-03 06:13:08,612 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:08,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:13:08,612 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:13:08,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:13:08,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:13:08,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:08,612 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2018-12-03 06:13:08,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:08,626 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2018-12-03 06:13:08,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:13:08,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-12-03 06:13:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:08,628 INFO L225 Difference]: With dead ends: 89 [2018-12-03 06:13:08,628 INFO L226 Difference]: Without dead ends: 67 [2018-12-03 06:13:08,628 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:08,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-03 06:13:08,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-12-03 06:13:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-03 06:13:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-12-03 06:13:08,633 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 42 [2018-12-03 06:13:08,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:08,633 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-12-03 06:13:08,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:13:08,633 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-12-03 06:13:08,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-03 06:13:08,634 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:08,634 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:08,634 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:08,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:08,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1516736276, now seen corresponding path program 1 times [2018-12-03 06:13:08,635 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:13:08,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:13:08,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:08,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:13:08,635 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:13:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-03 06:13:08,680 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:08,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:13:08,680 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:13:08,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:13:08,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:13:08,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:08,681 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 4 states. [2018-12-03 06:13:08,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:08,709 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2018-12-03 06:13:08,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:13:08,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2018-12-03 06:13:08,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:08,710 INFO L225 Difference]: With dead ends: 93 [2018-12-03 06:13:08,710 INFO L226 Difference]: Without dead ends: 71 [2018-12-03 06:13:08,710 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:08,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-03 06:13:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-12-03 06:13:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-03 06:13:08,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-12-03 06:13:08,715 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 45 [2018-12-03 06:13:08,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:08,715 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-12-03 06:13:08,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:13:08,715 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-12-03 06:13:08,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-03 06:13:08,716 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:08,716 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:08,716 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:08,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:08,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1006202099, now seen corresponding path program 1 times [2018-12-03 06:13:08,716 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:13:08,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:13:08,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:08,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:13:08,717 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:13:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-03 06:13:08,741 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:08,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-03 06:13:08,742 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:13:08,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 06:13:08,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 06:13:08,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 06:13:08,742 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 3 states. [2018-12-03 06:13:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:08,750 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2018-12-03 06:13:08,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 06:13:08,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2018-12-03 06:13:08,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:08,752 INFO L225 Difference]: With dead ends: 70 [2018-12-03 06:13:08,752 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 06:13:08,752 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 06:13:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 06:13:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-03 06:13:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-03 06:13:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2018-12-03 06:13:08,757 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 45 [2018-12-03 06:13:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:08,757 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2018-12-03 06:13:08,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 06:13:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2018-12-03 06:13:08,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-12-03 06:13:08,758 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:08,759 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:08,759 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:08,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:08,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1226294786, now seen corresponding path program 1 times [2018-12-03 06:13:08,759 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:13:08,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:13:08,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:08,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:13:08,760 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:13:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-03 06:13:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-03 06:13:08,800 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-03 06:13:08,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 06:13:08 BoogieIcfgContainer [2018-12-03 06:13:08,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 06:13:08,821 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 06:13:08,821 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 06:13:08,821 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 06:13:08,821 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:13:08" (3/4) ... [2018-12-03 06:13:08,824 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-03 06:13:08,824 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 06:13:08,824 INFO L168 Benchmark]: Toolchain (without parser) took 992.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 953.5 MB in the beginning and 1.0 GB in the end (delta: -74.1 MB). Peak memory consumption was 75.3 MB. Max. memory is 11.5 GB. [2018-12-03 06:13:08,825 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 06:13:08,825 INFO L168 Benchmark]: CACSL2BoogieTranslator took 142.71 ms. Allocated memory is still 1.0 GB. Free memory was 953.5 MB in the beginning and 942.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-03 06:13:08,826 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.84 ms. Allocated memory is still 1.0 GB. Free memory was 942.7 MB in the beginning and 937.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-03 06:13:08,826 INFO L168 Benchmark]: Boogie Preprocessor took 55.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 937.4 MB in the beginning and 1.1 GB in the end (delta: -203.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. [2018-12-03 06:13:08,826 INFO L168 Benchmark]: RCFGBuilder took 198.45 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-03 06:13:08,827 INFO L168 Benchmark]: TraceAbstraction took 574.69 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: 94.7 MB). Peak memory consumption was 94.7 MB. Max. memory is 11.5 GB. [2018-12-03 06:13:08,827 INFO L168 Benchmark]: Witness Printer took 2.71 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. [2018-12-03 06:13:08,829 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 142.71 ms. Allocated memory is still 1.0 GB. Free memory was 953.5 MB in the beginning and 942.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.84 ms. Allocated memory is still 1.0 GB. Free memory was 942.7 MB in the beginning and 937.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 55.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 937.4 MB in the beginning and 1.1 GB in the end (delta: -203.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 198.45 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: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 574.69 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: 94.7 MB). Peak memory consumption was 94.7 MB. Max. memory is 11.5 GB. * Witness Printer took 2.71 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, 0.5s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 407 SDtfs, 16 SDslu, 523 SDs, 0 SdLazy, 40 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 255 NumberOfCodeBlocks, 255 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 200 ConstructedInterpolants, 0 QuantifiedInterpolants, 8870 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 33/33 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-03 06:13:10,265 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 06:13:10,266 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 06:13:10,272 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 06:13:10,272 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 06:13:10,272 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 06:13:10,273 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 06:13:10,274 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 06:13:10,275 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 06:13:10,275 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 06:13:10,275 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 06:13:10,276 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 06:13:10,276 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 06:13:10,276 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 06:13:10,277 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 06:13:10,277 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 06:13:10,278 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 06:13:10,279 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 06:13:10,279 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 06:13:10,280 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 06:13:10,281 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 06:13:10,281 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 06:13:10,282 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 06:13:10,282 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 06:13:10,282 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 06:13:10,283 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 06:13:10,283 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 06:13:10,284 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 06:13:10,284 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 06:13:10,285 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 06:13:10,285 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 06:13:10,285 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 06:13:10,285 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 06:13:10,285 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 06:13:10,286 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 06:13:10,286 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 06:13:10,286 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-12-03 06:13:10,293 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 06:13:10,294 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 06:13:10,294 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 06:13:10,294 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 06:13:10,294 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 06:13:10,294 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 06:13:10,295 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 06:13:10,295 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 06:13:10,295 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 06:13:10,295 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 06:13:10,295 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 06:13:10,295 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 06:13:10,295 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 06:13:10,295 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 06:13:10,296 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 06:13:10,296 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 06:13:10,296 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 06:13:10,296 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-03 06:13:10,296 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-03 06:13:10,296 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 06:13:10,296 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 06:13:10,296 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-03 06:13:10,296 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 06:13:10,296 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 06:13:10,296 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 06:13:10,297 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 06:13:10,297 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 06:13:10,297 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 06:13:10,297 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 06:13:10,297 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 06:13:10,297 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 06:13:10,297 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-03 06:13:10,297 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 06:13:10,297 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-03 06:13:10,297 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-03 06:13:10,297 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_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df3954142d6b55c98b13b60b9fbaf053d4d402ff [2018-12-03 06:13:10,315 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 06:13:10,322 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 06:13:10,324 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 06:13:10,325 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 06:13:10,325 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 06:13:10,326 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-12-03 06:13:10,361 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/data/4885ed1ec/f97c659d67c54ced885225de1d5393cb/FLAG147d3a01d [2018-12-03 06:13:10,721 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 06:13:10,722 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-12-03 06:13:10,726 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/data/4885ed1ec/f97c659d67c54ced885225de1d5393cb/FLAG147d3a01d [2018-12-03 06:13:11,100 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/data/4885ed1ec/f97c659d67c54ced885225de1d5393cb [2018-12-03 06:13:11,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 06:13:11,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 06:13:11,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 06:13:11,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 06:13:11,105 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 06:13:11,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 06:13:11" (1/1) ... [2018-12-03 06:13:11,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@426f976d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:11, skipping insertion in model container [2018-12-03 06:13:11,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 06:13:11" (1/1) ... [2018-12-03 06:13:11,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 06:13:11,121 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 06:13:11,213 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 06:13:11,217 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 06:13:11,232 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 06:13:11,247 INFO L195 MainTranslator]: Completed translation [2018-12-03 06:13:11,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:11 WrapperNode [2018-12-03 06:13:11,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 06:13:11,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 06:13:11,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 06:13:11,248 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 06:13:11,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:11" (1/1) ... [2018-12-03 06:13:11,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:11" (1/1) ... [2018-12-03 06:13:11,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 06:13:11,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 06:13:11,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 06:13:11,264 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 06:13:11,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:11" (1/1) ... [2018-12-03 06:13:11,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:11" (1/1) ... [2018-12-03 06:13:11,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:11" (1/1) ... [2018-12-03 06:13:11,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:11" (1/1) ... [2018-12-03 06:13:11,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:11" (1/1) ... [2018-12-03 06:13:11,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:11" (1/1) ... [2018-12-03 06:13:11,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:11" (1/1) ... [2018-12-03 06:13:11,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 06:13:11,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 06:13:11,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 06:13:11,284 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 06:13:11,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 06:13:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 06:13:11,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 06:13:11,351 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2018-12-03 06:13:11,351 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2018-12-03 06:13:11,351 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-12-03 06:13:11,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-12-03 06:13:11,351 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-12-03 06:13:11,351 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-12-03 06:13:11,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 06:13:11,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 06:13:11,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-03 06:13:11,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-12-03 06:13:11,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 06:13:11,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 06:13:11,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2018-12-03 06:13:11,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-03 06:13:11,512 WARN L317 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-03 06:13:11,536 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 06:13:11,536 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-03 06:13:11,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:13:11 BoogieIcfgContainer [2018-12-03 06:13:11,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 06:13:11,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 06:13:11,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 06:13:11,539 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 06:13:11,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 06:13:11" (1/3) ... [2018-12-03 06:13:11,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc1e09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:13:11, skipping insertion in model container [2018-12-03 06:13:11,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:13:11" (2/3) ... [2018-12-03 06:13:11,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc1e09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:13:11, skipping insertion in model container [2018-12-03 06:13:11,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:13:11" (3/3) ... [2018-12-03 06:13:11,540 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251_true-unreach-call.c [2018-12-03 06:13:11,546 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 06:13:11,550 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-12-03 06:13:11,559 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-12-03 06:13:11,576 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-03 06:13:11,576 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 06:13:11,576 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 06:13:11,576 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 06:13:11,577 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 06:13:11,577 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 06:13:11,577 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 06:13:11,577 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 06:13:11,577 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 06:13:11,587 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-12-03 06:13:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-03 06:13:11,590 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:11,591 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:11,592 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:11,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:11,595 INFO L82 PathProgramCache]: Analyzing trace with hash 127161266, now seen corresponding path program 1 times [2018-12-03 06:13:11,598 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:11,598 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:11,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:11,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:13:11,673 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:11,681 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:11,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 06:13:11,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-03 06:13:11,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-03 06:13:11,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-03 06:13:11,693 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-12-03 06:13:11,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:11,708 INFO L93 Difference]: Finished difference Result 105 states and 146 transitions. [2018-12-03 06:13:11,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-03 06:13:11,708 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 35 [2018-12-03 06:13:11,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:11,714 INFO L225 Difference]: With dead ends: 105 [2018-12-03 06:13:11,714 INFO L226 Difference]: Without dead ends: 59 [2018-12-03 06:13:11,716 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-03 06:13:11,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-03 06:13:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-03 06:13:11,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-03 06:13:11,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2018-12-03 06:13:11,742 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 35 [2018-12-03 06:13:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:11,743 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2018-12-03 06:13:11,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-03 06:13:11,743 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2018-12-03 06:13:11,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-03 06:13:11,744 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:11,745 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:11,745 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:11,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:11,745 INFO L82 PathProgramCache]: Analyzing trace with hash -788283278, now seen corresponding path program 1 times [2018-12-03 06:13:11,745 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:11,745 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:11,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:11,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:13:11,805 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:11,813 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:11,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:13:11,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:13:11,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:13:11,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:11,815 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2018-12-03 06:13:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:11,847 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2018-12-03 06:13:11,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 06:13:11,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-12-03 06:13:11,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:11,848 INFO L225 Difference]: With dead ends: 108 [2018-12-03 06:13:11,848 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 06:13:11,849 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-03 06:13:11,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 06:13:11,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2018-12-03 06:13:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-03 06:13:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-12-03 06:13:11,855 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-12-03 06:13:11,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:11,855 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-12-03 06:13:11,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:13:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-12-03 06:13:11,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-03 06:13:11,856 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:11,856 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:11,856 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:11,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:11,857 INFO L82 PathProgramCache]: Analyzing trace with hash -728340568, now seen corresponding path program 1 times [2018-12-03 06:13:11,857 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:11,857 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:11,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:11,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:13:11,909 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:11,916 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:11,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:13:11,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:13:11,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:13:11,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:11,917 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-12-03 06:13:11,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:11,932 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2018-12-03 06:13:11,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:13:11,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-12-03 06:13:11,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:11,934 INFO L225 Difference]: With dead ends: 86 [2018-12-03 06:13:11,934 INFO L226 Difference]: Without dead ends: 64 [2018-12-03 06:13:11,934 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:11,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-03 06:13:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-12-03 06:13:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 06:13:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-03 06:13:11,939 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 41 [2018-12-03 06:13:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:11,939 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-03 06:13:11,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:13:11,939 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-03 06:13:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-03 06:13:11,940 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:11,940 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:11,940 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:11,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:11,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1290130751, now seen corresponding path program 1 times [2018-12-03 06:13:11,941 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:11,941 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:11,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:11,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:13:11,991 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:11,998 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:11,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:13:11,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:13:11,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:13:11,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:11,999 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-12-03 06:13:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:12,012 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-03 06:13:12,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:13:12,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-12-03 06:13:12,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:12,014 INFO L225 Difference]: With dead ends: 89 [2018-12-03 06:13:12,014 INFO L226 Difference]: Without dead ends: 67 [2018-12-03 06:13:12,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:12,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-03 06:13:12,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-12-03 06:13:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 06:13:12,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-03 06:13:12,019 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 42 [2018-12-03 06:13:12,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:12,019 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-03 06:13:12,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:13:12,019 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-03 06:13:12,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-03 06:13:12,020 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:12,020 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:12,020 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:12,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:12,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1173472140, now seen corresponding path program 1 times [2018-12-03 06:13:12,021 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:12,021 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:12,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:12,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:13:12,070 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:12,077 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:12,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:13:12,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:13:12,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:13:12,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:12,078 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-12-03 06:13:12,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:12,090 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-03 06:13:12,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:13:12,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-12-03 06:13:12,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:12,092 INFO L225 Difference]: With dead ends: 89 [2018-12-03 06:13:12,092 INFO L226 Difference]: Without dead ends: 67 [2018-12-03 06:13:12,092 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:12,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-03 06:13:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-12-03 06:13:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 06:13:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-03 06:13:12,097 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 43 [2018-12-03 06:13:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:12,097 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-03 06:13:12,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:13:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-03 06:13:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-03 06:13:12,098 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:12,098 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:12,098 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:12,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:12,098 INFO L82 PathProgramCache]: Analyzing trace with hash -707704861, now seen corresponding path program 1 times [2018-12-03 06:13:12,098 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:12,099 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:12,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:12,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:13:12,143 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:12,149 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:12,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:13:12,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:13:12,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:13:12,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:12,150 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-12-03 06:13:12,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:12,163 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-03 06:13:12,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:13:12,164 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-12-03 06:13:12,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:12,164 INFO L225 Difference]: With dead ends: 89 [2018-12-03 06:13:12,164 INFO L226 Difference]: Without dead ends: 67 [2018-12-03 06:13:12,165 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-03 06:13:12,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-12-03 06:13:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-03 06:13:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-03 06:13:12,169 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 44 [2018-12-03 06:13:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:12,169 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-03 06:13:12,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:13:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-03 06:13:12,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-03 06:13:12,170 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:12,170 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:12,170 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:12,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:12,170 INFO L82 PathProgramCache]: Analyzing trace with hash 799846948, now seen corresponding path program 1 times [2018-12-03 06:13:12,171 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:12,171 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:12,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:12,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 06:13:12,304 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-03 06:13:12,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:13:12,506 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:13:12,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:12,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-03 06:13:12,545 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:12,559 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-03 06:13:12,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 14 [2018-12-03 06:13:12,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-03 06:13:12,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-03 06:13:12,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-12-03 06:13:12,560 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 14 states. [2018-12-03 06:13:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:12,910 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2018-12-03 06:13:12,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 06:13:12,911 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2018-12-03 06:13:12,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:12,912 INFO L225 Difference]: With dead ends: 105 [2018-12-03 06:13:12,912 INFO L226 Difference]: Without dead ends: 91 [2018-12-03 06:13:12,912 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-12-03 06:13:12,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-12-03 06:13:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2018-12-03 06:13:12,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-12-03 06:13:12,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2018-12-03 06:13:12,918 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 44 [2018-12-03 06:13:12,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:12,918 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2018-12-03 06:13:12,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-03 06:13:12,918 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2018-12-03 06:13:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-03 06:13:12,919 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:12,919 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:12,919 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:12,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:12,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1433909297, now seen corresponding path program 1 times [2018-12-03 06:13:12,920 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:12,920 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:12,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:12,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:13:13,129 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:13:13,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:13:13,579 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:13:13,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:13,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-03 06:13:13,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:13:14,197 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2018-12-03 06:13:14,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11, 11] total 29 [2018-12-03 06:13:14,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-03 06:13:14,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-03 06:13:14,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2018-12-03 06:13:14,199 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand 29 states. [2018-12-03 06:13:15,780 WARN L180 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 19 [2018-12-03 06:13:16,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:16,826 INFO L93 Difference]: Finished difference Result 136 states and 179 transitions. [2018-12-03 06:13:16,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-03 06:13:16,827 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 49 [2018-12-03 06:13:16,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:16,830 INFO L225 Difference]: With dead ends: 136 [2018-12-03 06:13:16,830 INFO L226 Difference]: Without dead ends: 134 [2018-12-03 06:13:16,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2018-12-03 06:13:16,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-12-03 06:13:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2018-12-03 06:13:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 06:13:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2018-12-03 06:13:16,848 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 49 [2018-12-03 06:13:16,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:16,849 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2018-12-03 06:13:16,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-03 06:13:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2018-12-03 06:13:16,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-03 06:13:16,851 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:16,851 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:16,852 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:16,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:16,852 INFO L82 PathProgramCache]: Analyzing trace with hash -183164066, now seen corresponding path program 1 times [2018-12-03 06:13:16,853 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:16,853 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:16,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:16,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-03 06:13:16,957 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:16,964 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:16,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-03 06:13:16,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 06:13:16,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 06:13:16,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-12-03 06:13:16,965 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand 8 states. [2018-12-03 06:13:17,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:17,209 INFO L93 Difference]: Finished difference Result 158 states and 208 transitions. [2018-12-03 06:13:17,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 06:13:17,210 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2018-12-03 06:13:17,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:17,211 INFO L225 Difference]: With dead ends: 158 [2018-12-03 06:13:17,211 INFO L226 Difference]: Without dead ends: 105 [2018-12-03 06:13:17,211 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-12-03 06:13:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-12-03 06:13:17,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2018-12-03 06:13:17,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 06:13:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2018-12-03 06:13:17,218 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 53 [2018-12-03 06:13:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:17,218 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2018-12-03 06:13:17,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 06:13:17,218 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2018-12-03 06:13:17,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-03 06:13:17,219 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:17,219 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:17,219 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:17,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:17,219 INFO L82 PathProgramCache]: Analyzing trace with hash 374913712, now seen corresponding path program 1 times [2018-12-03 06:13:17,220 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:17,220 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:17,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:17,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-03 06:13:17,327 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-03 06:13:17,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:13:17,541 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:13:17,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:17,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-12-03 06:13:17,593 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:17,608 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-03 06:13:17,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 13 [2018-12-03 06:13:17,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-03 06:13:17,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-03 06:13:17,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-12-03 06:13:17,608 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand 13 states. [2018-12-03 06:13:17,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:17,856 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2018-12-03 06:13:17,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 06:13:17,857 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2018-12-03 06:13:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:17,857 INFO L225 Difference]: With dead ends: 110 [2018-12-03 06:13:17,857 INFO L226 Difference]: Without dead ends: 106 [2018-12-03 06:13:17,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-12-03 06:13:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-12-03 06:13:17,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2018-12-03 06:13:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 06:13:17,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2018-12-03 06:13:17,866 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 58 [2018-12-03 06:13:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:17,866 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2018-12-03 06:13:17,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-03 06:13:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2018-12-03 06:13:17,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-03 06:13:17,867 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:17,867 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:17,867 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:17,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:17,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1241696182, now seen corresponding path program 1 times [2018-12-03 06:13:17,868 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:17,868 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:17,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:17,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-03 06:13:17,918 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:17,925 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:17,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:13:17,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:13:17,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:13:17,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:17,926 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand 4 states. [2018-12-03 06:13:17,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:17,941 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2018-12-03 06:13:17,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:13:17,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2018-12-03 06:13:17,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:17,942 INFO L225 Difference]: With dead ends: 119 [2018-12-03 06:13:17,942 INFO L226 Difference]: Without dead ends: 92 [2018-12-03 06:13:17,942 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:17,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-12-03 06:13:17,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-12-03 06:13:17,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-03 06:13:17,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-12-03 06:13:17,947 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 61 [2018-12-03 06:13:17,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:17,947 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-12-03 06:13:17,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:13:17,948 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-12-03 06:13:17,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-03 06:13:17,948 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:17,948 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:17,948 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:17,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:17,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1403627392, now seen corresponding path program 1 times [2018-12-03 06:13:17,948 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:17,949 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:17,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:17,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-03 06:13:18,002 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:18,009 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:18,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:13:18,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:13:18,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:13:18,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:18,010 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 4 states. [2018-12-03 06:13:18,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:18,021 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2018-12-03 06:13:18,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:13:18,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-12-03 06:13:18,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:18,022 INFO L225 Difference]: With dead ends: 122 [2018-12-03 06:13:18,022 INFO L226 Difference]: Without dead ends: 95 [2018-12-03 06:13:18,022 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-12-03 06:13:18,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2018-12-03 06:13:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-03 06:13:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-12-03 06:13:18,028 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 55 [2018-12-03 06:13:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:18,028 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-12-03 06:13:18,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:13:18,028 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-12-03 06:13:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-03 06:13:18,029 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:18,029 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:18,029 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:18,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:18,029 INFO L82 PathProgramCache]: Analyzing trace with hash -342130789, now seen corresponding path program 1 times [2018-12-03 06:13:18,029 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:18,029 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:18,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:18,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-03 06:13:18,231 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:18,238 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:18,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-12-03 06:13:18,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-03 06:13:18,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-03 06:13:18,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-03 06:13:18,239 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 9 states. [2018-12-03 06:13:18,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:18,948 INFO L93 Difference]: Finished difference Result 147 states and 189 transitions. [2018-12-03 06:13:18,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 06:13:18,949 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2018-12-03 06:13:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:18,949 INFO L225 Difference]: With dead ends: 147 [2018-12-03 06:13:18,950 INFO L226 Difference]: Without dead ends: 122 [2018-12-03 06:13:18,950 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-12-03 06:13:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-12-03 06:13:18,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2018-12-03 06:13:18,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-12-03 06:13:18,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2018-12-03 06:13:18,956 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 63 [2018-12-03 06:13:18,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:18,956 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2018-12-03 06:13:18,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-03 06:13:18,956 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2018-12-03 06:13:18,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-03 06:13:18,956 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:18,957 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:18,957 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:18,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:18,957 INFO L82 PathProgramCache]: Analyzing trace with hash -235124114, now seen corresponding path program 1 times [2018-12-03 06:13:18,957 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:18,957 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:18,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:18,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-03 06:13:19,149 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:19,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:13:19,303 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:13:19,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:19,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-03 06:13:19,330 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:19,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 06:13:19,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-03 06:13:19,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 06:13:19,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 06:13:19,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-03 06:13:19,495 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand 8 states. [2018-12-03 06:13:20,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:20,260 INFO L93 Difference]: Finished difference Result 134 states and 170 transitions. [2018-12-03 06:13:20,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 06:13:20,260 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2018-12-03 06:13:20,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:20,261 INFO L225 Difference]: With dead ends: 134 [2018-12-03 06:13:20,261 INFO L226 Difference]: Without dead ends: 111 [2018-12-03 06:13:20,261 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-12-03 06:13:20,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-12-03 06:13:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2018-12-03 06:13:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-03 06:13:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 120 transitions. [2018-12-03 06:13:20,268 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 120 transitions. Word has length 56 [2018-12-03 06:13:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:20,268 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 120 transitions. [2018-12-03 06:13:20,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 06:13:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 120 transitions. [2018-12-03 06:13:20,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-03 06:13:20,269 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:20,269 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:20,269 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:20,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:20,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2065698476, now seen corresponding path program 1 times [2018-12-03 06:13:20,269 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:20,269 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:20,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:20,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-12-03 06:13:20,451 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:20,458 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:20,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-12-03 06:13:20,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-03 06:13:20,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-03 06:13:20,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-12-03 06:13:20,459 INFO L87 Difference]: Start difference. First operand 92 states and 120 transitions. Second operand 11 states. [2018-12-03 06:13:21,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:21,234 INFO L93 Difference]: Finished difference Result 121 states and 156 transitions. [2018-12-03 06:13:21,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 06:13:21,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-12-03 06:13:21,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:21,235 INFO L225 Difference]: With dead ends: 121 [2018-12-03 06:13:21,235 INFO L226 Difference]: Without dead ends: 119 [2018-12-03 06:13:21,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-12-03 06:13:21,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-12-03 06:13:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2018-12-03 06:13:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-03 06:13:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2018-12-03 06:13:21,241 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 56 [2018-12-03 06:13:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:21,241 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2018-12-03 06:13:21,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-03 06:13:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2018-12-03 06:13:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-03 06:13:21,242 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:21,242 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:21,242 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:21,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:21,242 INFO L82 PathProgramCache]: Analyzing trace with hash -341505115, now seen corresponding path program 1 times [2018-12-03 06:13:21,242 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:21,242 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:21,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:21,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-03 06:13:21,291 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:21,298 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:21,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:13:21,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:13:21,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:13:21,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:21,299 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 4 states. [2018-12-03 06:13:21,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:21,311 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2018-12-03 06:13:21,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:13:21,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-12-03 06:13:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:21,312 INFO L225 Difference]: With dead ends: 127 [2018-12-03 06:13:21,312 INFO L226 Difference]: Without dead ends: 100 [2018-12-03 06:13:21,312 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-12-03 06:13:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2018-12-03 06:13:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-03 06:13:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2018-12-03 06:13:21,318 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 56 [2018-12-03 06:13:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:21,318 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2018-12-03 06:13:21,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:13:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2018-12-03 06:13:21,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-03 06:13:21,318 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:21,318 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:21,319 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:21,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:21,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1176443467, now seen corresponding path program 1 times [2018-12-03 06:13:21,319 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:21,319 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 22 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:21,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:21,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-03 06:13:21,764 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:21,982 WARN L180 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-03 06:13:22,271 WARN L180 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2018-12-03 06:13:22,646 WARN L180 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-03 06:13:22,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:13:22,891 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:13:22,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:22,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-03 06:13:23,068 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:23,326 WARN L180 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-03 06:13:23,470 WARN L180 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-03 06:13:23,962 WARN L180 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-03 06:13:24,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 06:13:24,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 17 [2018-12-03 06:13:24,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-03 06:13:24,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-03 06:13:24,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-12-03 06:13:24,200 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 17 states. [2018-12-03 06:13:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:25,861 INFO L93 Difference]: Finished difference Result 154 states and 201 transitions. [2018-12-03 06:13:25,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-03 06:13:25,862 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-12-03 06:13:25,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:25,862 INFO L225 Difference]: With dead ends: 154 [2018-12-03 06:13:25,862 INFO L226 Difference]: Without dead ends: 127 [2018-12-03 06:13:25,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2018-12-03 06:13:25,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-12-03 06:13:25,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2018-12-03 06:13:25,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-12-03 06:13:25,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2018-12-03 06:13:25,868 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 63 [2018-12-03 06:13:25,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:25,869 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2018-12-03 06:13:25,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-03 06:13:25,869 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2018-12-03 06:13:25,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-12-03 06:13:25,869 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:25,869 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:25,869 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:25,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:25,870 INFO L82 PathProgramCache]: Analyzing trace with hash -361444970, now seen corresponding path program 1 times [2018-12-03 06:13:25,870 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:25,870 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:25,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:25,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-03 06:13:25,974 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 06:13:26,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:13:26,143 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:13:26,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:26,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-03 06:13:26,208 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 06:13:26,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:13:26,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 12] total 17 [2018-12-03 06:13:26,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-03 06:13:26,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-03 06:13:26,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-12-03 06:13:26,362 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 17 states. [2018-12-03 06:13:26,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:26,786 INFO L93 Difference]: Finished difference Result 149 states and 192 transitions. [2018-12-03 06:13:26,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 06:13:26,786 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2018-12-03 06:13:26,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:26,787 INFO L225 Difference]: With dead ends: 149 [2018-12-03 06:13:26,787 INFO L226 Difference]: Without dead ends: 119 [2018-12-03 06:13:26,787 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2018-12-03 06:13:26,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-12-03 06:13:26,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2018-12-03 06:13:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-12-03 06:13:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2018-12-03 06:13:26,793 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 64 [2018-12-03 06:13:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:26,793 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2018-12-03 06:13:26,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-03 06:13:26,793 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2018-12-03 06:13:26,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-03 06:13:26,794 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:26,794 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:26,794 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:26,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:26,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1339205341, now seen corresponding path program 1 times [2018-12-03 06:13:26,794 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:26,794 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 26 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:26,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:26,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-03 06:13:27,007 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-03 06:13:27,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:13:27,382 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:13:27,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:27,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-03 06:13:27,510 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-03 06:13:27,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:13:27,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 15, 14] total 26 [2018-12-03 06:13:27,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-03 06:13:27,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-03 06:13:27,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2018-12-03 06:13:27,789 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand 26 states. [2018-12-03 06:13:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:28,999 INFO L93 Difference]: Finished difference Result 154 states and 199 transitions. [2018-12-03 06:13:29,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-03 06:13:29,000 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2018-12-03 06:13:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:29,001 INFO L225 Difference]: With dead ends: 154 [2018-12-03 06:13:29,001 INFO L226 Difference]: Without dead ends: 152 [2018-12-03 06:13:29,001 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2018-12-03 06:13:29,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-12-03 06:13:29,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 111. [2018-12-03 06:13:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-12-03 06:13:29,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 148 transitions. [2018-12-03 06:13:29,009 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 148 transitions. Word has length 57 [2018-12-03 06:13:29,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:29,009 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 148 transitions. [2018-12-03 06:13:29,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-03 06:13:29,009 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 148 transitions. [2018-12-03 06:13:29,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-03 06:13:29,010 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:29,010 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:29,010 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:29,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:29,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1812913204, now seen corresponding path program 1 times [2018-12-03 06:13:29,011 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:29,011 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 28 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:29,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:29,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-03 06:13:29,117 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-12-03 06:13:29,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:13:29,270 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:13:29,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:29,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-03 06:13:29,299 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-12-03 06:13:29,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:13:29,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9] total 13 [2018-12-03 06:13:29,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-03 06:13:29,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-03 06:13:29,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-12-03 06:13:29,416 INFO L87 Difference]: Start difference. First operand 111 states and 148 transitions. Second operand 13 states. [2018-12-03 06:13:29,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:29,752 INFO L93 Difference]: Finished difference Result 195 states and 246 transitions. [2018-12-03 06:13:29,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 06:13:29,752 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2018-12-03 06:13:29,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:29,753 INFO L225 Difference]: With dead ends: 195 [2018-12-03 06:13:29,753 INFO L226 Difference]: Without dead ends: 113 [2018-12-03 06:13:29,753 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-12-03 06:13:29,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-12-03 06:13:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 91. [2018-12-03 06:13:29,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-03 06:13:29,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2018-12-03 06:13:29,758 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 69 [2018-12-03 06:13:29,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:29,758 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2018-12-03 06:13:29,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-03 06:13:29,758 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2018-12-03 06:13:29,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-03 06:13:29,758 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:29,758 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:29,759 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:29,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:29,759 INFO L82 PathProgramCache]: Analyzing trace with hash -241334884, now seen corresponding path program 1 times [2018-12-03 06:13:29,759 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:29,759 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 30 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:29,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:29,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-03 06:13:29,813 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:29,820 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:29,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:13:29,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:13:29,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:13:29,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:29,821 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 4 states. [2018-12-03 06:13:29,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:29,832 INFO L93 Difference]: Finished difference Result 122 states and 153 transitions. [2018-12-03 06:13:29,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:13:29,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-12-03 06:13:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:29,834 INFO L225 Difference]: With dead ends: 122 [2018-12-03 06:13:29,834 INFO L226 Difference]: Without dead ends: 93 [2018-12-03 06:13:29,834 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:29,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-03 06:13:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-12-03 06:13:29,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 06:13:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2018-12-03 06:13:29,839 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 57 [2018-12-03 06:13:29,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:29,839 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2018-12-03 06:13:29,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:13:29,839 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2018-12-03 06:13:29,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-03 06:13:29,840 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:29,840 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:29,840 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:29,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:29,840 INFO L82 PathProgramCache]: Analyzing trace with hash -650159109, now seen corresponding path program 1 times [2018-12-03 06:13:29,841 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:29,841 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 31 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:29,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:29,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 06:13:30,306 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:30,313 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:30,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2018-12-03 06:13:30,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-03 06:13:30,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-03 06:13:30,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-12-03 06:13:30,314 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 15 states. [2018-12-03 06:13:31,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:31,596 INFO L93 Difference]: Finished difference Result 130 states and 163 transitions. [2018-12-03 06:13:31,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-03 06:13:31,597 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-12-03 06:13:31,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:31,597 INFO L225 Difference]: With dead ends: 130 [2018-12-03 06:13:31,598 INFO L226 Difference]: Without dead ends: 96 [2018-12-03 06:13:31,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2018-12-03 06:13:31,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-12-03 06:13:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2018-12-03 06:13:31,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-03 06:13:31,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2018-12-03 06:13:31,602 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 57 [2018-12-03 06:13:31,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:31,602 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2018-12-03 06:13:31,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-03 06:13:31,602 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2018-12-03 06:13:31,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-03 06:13:31,602 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:31,603 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:31,603 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:31,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:31,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1134884075, now seen corresponding path program 1 times [2018-12-03 06:13:31,603 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:31,603 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 32 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:31,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:31,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-03 06:13:31,697 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-12-03 06:13:31,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:13:31,880 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:13:31,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:31,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-03 06:13:31,947 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-12-03 06:13:32,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:13:32,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 9] total 17 [2018-12-03 06:13:32,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-03 06:13:32,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-03 06:13:32,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-12-03 06:13:32,170 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 17 states. [2018-12-03 06:13:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:32,506 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2018-12-03 06:13:32,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-03 06:13:32,506 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2018-12-03 06:13:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:32,507 INFO L225 Difference]: With dead ends: 92 [2018-12-03 06:13:32,507 INFO L226 Difference]: Without dead ends: 60 [2018-12-03 06:13:32,507 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2018-12-03 06:13:32,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-03 06:13:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2018-12-03 06:13:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-03 06:13:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2018-12-03 06:13:32,510 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 61 [2018-12-03 06:13:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:32,510 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2018-12-03 06:13:32,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-03 06:13:32,510 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2018-12-03 06:13:32,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-12-03 06:13:32,510 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:32,510 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:32,510 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:32,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:32,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1573046304, now seen corresponding path program 1 times [2018-12-03 06:13:32,511 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:32,511 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 34 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:32,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:32,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-03 06:13:32,713 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:32,720 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:32,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-03 06:13:32,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 06:13:32,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 06:13:32,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-03 06:13:32,721 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 12 states. [2018-12-03 06:13:33,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:33,300 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2018-12-03 06:13:33,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 06:13:33,301 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2018-12-03 06:13:33,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:33,301 INFO L225 Difference]: With dead ends: 79 [2018-12-03 06:13:33,301 INFO L226 Difference]: Without dead ends: 58 [2018-12-03 06:13:33,301 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-03 06:13:33,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-03 06:13:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-12-03 06:13:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-03 06:13:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-12-03 06:13:33,304 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 70 [2018-12-03 06:13:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:33,304 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-12-03 06:13:33,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 06:13:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-12-03 06:13:33,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-12-03 06:13:33,304 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:33,304 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:33,305 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:33,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:33,305 INFO L82 PathProgramCache]: Analyzing trace with hash -193580157, now seen corresponding path program 1 times [2018-12-03 06:13:33,305 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:33,305 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 35 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:33,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:33,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-03 06:13:33,551 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:33,558 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:33,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-03 06:13:33,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 06:13:33,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 06:13:33,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-03 06:13:33,559 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 12 states. [2018-12-03 06:13:34,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:34,280 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2018-12-03 06:13:34,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 06:13:34,280 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2018-12-03 06:13:34,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:34,281 INFO L225 Difference]: With dead ends: 81 [2018-12-03 06:13:34,281 INFO L226 Difference]: Without dead ends: 60 [2018-12-03 06:13:34,281 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-03 06:13:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-03 06:13:34,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2018-12-03 06:13:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-03 06:13:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-12-03 06:13:34,284 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 71 [2018-12-03 06:13:34,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:34,284 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-12-03 06:13:34,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 06:13:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-12-03 06:13:34,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-12-03 06:13:34,284 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:34,284 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:34,284 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:34,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:34,285 INFO L82 PathProgramCache]: Analyzing trace with hash 997969323, now seen corresponding path program 1 times [2018-12-03 06:13:34,285 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:34,285 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 36 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:34,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:34,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-03 06:13:34,458 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-03 06:13:35,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:13:35,069 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:13:35,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:35,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-03 06:13:35,121 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-03 06:13:35,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:13:35,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 17 [2018-12-03 06:13:35,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-03 06:13:35,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-03 06:13:35,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-12-03 06:13:35,423 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 17 states. [2018-12-03 06:13:36,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:36,023 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2018-12-03 06:13:36,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 06:13:36,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-12-03 06:13:36,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:36,024 INFO L225 Difference]: With dead ends: 83 [2018-12-03 06:13:36,024 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 06:13:36,025 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 262 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2018-12-03 06:13:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 06:13:36,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2018-12-03 06:13:36,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-03 06:13:36,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-12-03 06:13:36,028 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 71 [2018-12-03 06:13:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:36,028 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-12-03 06:13:36,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-03 06:13:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-12-03 06:13:36,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-12-03 06:13:36,029 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:36,029 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:36,029 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:36,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:36,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1902363068, now seen corresponding path program 1 times [2018-12-03 06:13:36,029 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:36,029 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 38 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:36,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:36,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-03 06:13:36,313 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:36,320 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:36,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-03 06:13:36,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 06:13:36,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 06:13:36,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-03 06:13:36,321 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 12 states. [2018-12-03 06:13:37,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:37,094 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2018-12-03 06:13:37,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 06:13:37,094 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2018-12-03 06:13:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:37,095 INFO L225 Difference]: With dead ends: 85 [2018-12-03 06:13:37,095 INFO L226 Difference]: Without dead ends: 64 [2018-12-03 06:13:37,095 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-03 06:13:37,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-03 06:13:37,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2018-12-03 06:13:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-03 06:13:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-12-03 06:13:37,099 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 72 [2018-12-03 06:13:37,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:37,099 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-12-03 06:13:37,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 06:13:37,099 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-12-03 06:13:37,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-12-03 06:13:37,099 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:37,099 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:37,099 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:37,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:37,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1845453958, now seen corresponding path program 1 times [2018-12-03 06:13:37,100 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:37,100 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 39 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:37,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:37,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-12-03 06:13:37,252 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:37,595 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-12-03 06:13:37,745 WARN L180 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-12-03 06:13:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-12-03 06:13:37,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:13:37,780 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 06:13:37,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:37,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-03 06:13:37,867 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:13:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-12-03 06:13:38,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 06:13:38,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12, 13] total 22 [2018-12-03 06:13:38,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-03 06:13:38,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-03 06:13:38,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2018-12-03 06:13:38,085 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 22 states. [2018-12-03 06:13:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:38,571 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2018-12-03 06:13:38,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 06:13:38,571 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2018-12-03 06:13:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:38,571 INFO L225 Difference]: With dead ends: 78 [2018-12-03 06:13:38,571 INFO L226 Difference]: Without dead ends: 63 [2018-12-03 06:13:38,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2018-12-03 06:13:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-03 06:13:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2018-12-03 06:13:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-03 06:13:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2018-12-03 06:13:38,574 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 72 [2018-12-03 06:13:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:38,574 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2018-12-03 06:13:38,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-03 06:13:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2018-12-03 06:13:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-03 06:13:38,575 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:38,575 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:38,575 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:38,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:38,575 INFO L82 PathProgramCache]: Analyzing trace with hash -562618969, now seen corresponding path program 1 times [2018-12-03 06:13:38,575 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:38,575 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 41 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:38,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:38,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-03 06:13:38,795 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:38,803 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:38,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-03 06:13:38,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 06:13:38,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 06:13:38,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-03 06:13:38,803 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 12 states. [2018-12-03 06:13:39,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:39,557 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2018-12-03 06:13:39,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 06:13:39,557 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2018-12-03 06:13:39,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:39,558 INFO L225 Difference]: With dead ends: 78 [2018-12-03 06:13:39,558 INFO L226 Difference]: Without dead ends: 57 [2018-12-03 06:13:39,558 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-03 06:13:39,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-03 06:13:39,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2018-12-03 06:13:39,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-03 06:13:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2018-12-03 06:13:39,560 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 73 [2018-12-03 06:13:39,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:39,561 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2018-12-03 06:13:39,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 06:13:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2018-12-03 06:13:39,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-03 06:13:39,561 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:13:39,561 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:13:39,561 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 06:13:39,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:13:39,561 INFO L82 PathProgramCache]: Analyzing trace with hash 130482728, now seen corresponding path program 1 times [2018-12-03 06:13:39,562 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-03 06:13:39,562 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/mathsat Starting monitored process 42 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with mathsat -unsat_core_generation=3 [2018-12-03 06:13:39,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:13:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:13:39,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:13:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 06:13:39,619 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 06:13:39,630 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:13:39,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:13:39,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-03 06:13:39,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-03 06:13:39,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:39,631 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 4 states. [2018-12-03 06:13:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:13:39,637 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-12-03 06:13:39,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-03 06:13:39,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2018-12-03 06:13:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:13:39,638 INFO L225 Difference]: With dead ends: 58 [2018-12-03 06:13:39,638 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 06:13:39,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-03 06:13:39,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 06:13:39,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 06:13:39,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 06:13:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 06:13:39,639 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2018-12-03 06:13:39,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:13:39,639 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 06:13:39,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-03 06:13:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 06:13:39,639 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 06:13:39,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 06:13:39,755 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 06:13:40,023 INFO L448 ceAbstractionStarter]: For program point isnan_floatFINAL(line 55) no Hoare annotation was computed. [2018-12-03 06:13:40,024 INFO L451 ceAbstractionStarter]: At program point isnan_floatENTRY(line 55) the Hoare annotation is: true [2018-12-03 06:13:40,024 INFO L448 ceAbstractionStarter]: For program point isnan_floatEXIT(line 55) no Hoare annotation was computed. [2018-12-03 06:13:40,024 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-12-03 06:13:40,024 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-12-03 06:13:40,024 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-03 06:13:40,024 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-03 06:13:40,024 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-03 06:13:40,024 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-03 06:13:40,024 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-03 06:13:40,024 INFO L444 ceAbstractionStarter]: At program point L68-3(line 68) the Hoare annotation is: (and (not |main_#t~short9|) (not |main_#t~short13|) (fp.eq main_~x~0 main_~x~0) (= (_ bv0 32) |main_#t~ret7|) (= |main_#t~ret10| (_ bv0 32)) |main_#t~short12|) [2018-12-03 06:13:40,024 INFO L448 ceAbstractionStarter]: For program point L68-4(line 68) no Hoare annotation was computed. [2018-12-03 06:13:40,024 INFO L448 ceAbstractionStarter]: For program point L68-6(line 68) no Hoare annotation was computed. [2018-12-03 06:13:40,025 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 57 86) no Hoare annotation was computed. [2018-12-03 06:13:40,025 INFO L444 ceAbstractionStarter]: At program point L73(line 73) the Hoare annotation is: (let ((.cse1 (fp.eq main_~y~0 main_~y~0)) (.cse0 (fp.eq main_~x~0 main_~x~0))) (or (and (= main_~x~0 main_~res~0) .cse0 (not .cse1)) (and (= main_~y~0 main_~res~0) .cse1 (not .cse0)))) [2018-12-03 06:13:40,025 INFO L448 ceAbstractionStarter]: For program point L73-1(line 73) no Hoare annotation was computed. [2018-12-03 06:13:40,025 INFO L448 ceAbstractionStarter]: For program point L73-2(line 73) no Hoare annotation was computed. [2018-12-03 06:13:40,025 INFO L444 ceAbstractionStarter]: At program point L73-3(line 73) the Hoare annotation is: (and |main_#t~short17| (= main_~y~0 main_~res~0) (= (_ bv1 32) |main_#t~ret15|) (fp.eq main_~y~0 main_~y~0) (not (fp.eq main_~x~0 main_~x~0))) [2018-12-03 06:13:40,025 INFO L448 ceAbstractionStarter]: For program point L73-4(line 73) no Hoare annotation was computed. [2018-12-03 06:13:40,025 INFO L448 ceAbstractionStarter]: For program point L73-6(lines 73 76) no Hoare annotation was computed. [2018-12-03 06:13:40,025 INFO L448 ceAbstractionStarter]: For program point L74(line 74) no Hoare annotation was computed. [2018-12-03 06:13:40,025 INFO L444 ceAbstractionStarter]: At program point L70(line 70) the Hoare annotation is: (let ((.cse1 (fp.eq main_~y~0 main_~y~0)) (.cse0 (fp.eq main_~x~0 main_~x~0))) (or (and .cse0 (not .cse1)) (and .cse1 (not .cse0)))) [2018-12-03 06:13:40,025 INFO L448 ceAbstractionStarter]: For program point L70-1(line 70) no Hoare annotation was computed. [2018-12-03 06:13:40,025 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 74) no Hoare annotation was computed. [2018-12-03 06:13:40,025 INFO L444 ceAbstractionStarter]: At program point L79(line 79) the Hoare annotation is: (or (and (= main_~x~0 main_~res~0) (not (fp.eq main_~y~0 main_~y~0))) (not (fp.eq main_~x~0 main_~x~0))) [2018-12-03 06:13:40,025 INFO L448 ceAbstractionStarter]: For program point L79-1(line 79) no Hoare annotation was computed. [2018-12-03 06:13:40,026 INFO L448 ceAbstractionStarter]: For program point L79-2(line 79) no Hoare annotation was computed. [2018-12-03 06:13:40,026 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 57 86) no Hoare annotation was computed. [2018-12-03 06:13:40,026 INFO L444 ceAbstractionStarter]: At program point L79-3(line 79) the Hoare annotation is: (and (= main_~x~0 main_~res~0) (fp.eq main_~x~0 main_~x~0) |main_#t~short20| (not (fp.eq main_~y~0 main_~y~0))) [2018-12-03 06:13:40,026 INFO L448 ceAbstractionStarter]: For program point L79-4(line 79) no Hoare annotation was computed. [2018-12-03 06:13:40,026 INFO L448 ceAbstractionStarter]: For program point L79-6(lines 79 82) no Hoare annotation was computed. [2018-12-03 06:13:40,026 INFO L451 ceAbstractionStarter]: At program point L67(line 67) the Hoare annotation is: true [2018-12-03 06:13:40,026 INFO L448 ceAbstractionStarter]: For program point L67-1(line 67) no Hoare annotation was computed. [2018-12-03 06:13:40,026 INFO L448 ceAbstractionStarter]: For program point L67-2(line 67) no Hoare annotation was computed. [2018-12-03 06:13:40,026 INFO L444 ceAbstractionStarter]: At program point L67-3(line 67) the Hoare annotation is: (and (= (_ bv1 32) |main_#t~ret7|) |main_#t~short9| (not (fp.eq main_~x~0 main_~x~0))) [2018-12-03 06:13:40,026 INFO L448 ceAbstractionStarter]: For program point L67-4(line 67) no Hoare annotation was computed. [2018-12-03 06:13:40,026 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 57 86) the Hoare annotation is: true [2018-12-03 06:13:40,026 INFO L448 ceAbstractionStarter]: For program point L67-6(line 67) no Hoare annotation was computed. [2018-12-03 06:13:40,026 INFO L448 ceAbstractionStarter]: For program point L67-7(lines 67 68) no Hoare annotation was computed. [2018-12-03 06:13:40,026 INFO L448 ceAbstractionStarter]: For program point L67-9(lines 67 83) no Hoare annotation was computed. [2018-12-03 06:13:40,026 INFO L448 ceAbstractionStarter]: For program point L67-11(lines 67 83) no Hoare annotation was computed. [2018-12-03 06:13:40,027 INFO L448 ceAbstractionStarter]: For program point L80(line 80) no Hoare annotation was computed. [2018-12-03 06:13:40,027 INFO L448 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 80) no Hoare annotation was computed. [2018-12-03 06:13:40,027 INFO L444 ceAbstractionStarter]: At program point L68(line 68) the Hoare annotation is: (let ((.cse2 (fp.eq main_~x~0 main_~x~0)) (.cse0 (not |main_#t~short9|)) (.cse1 (not |main_#t~short13|))) (or (and .cse0 .cse1 .cse2 (= (_ bv0 32) |main_#t~ret7|)) (and (and (= (_ bv1 32) |main_#t~ret7|) (not .cse2)) (= (bvadd |main_#t~ret8| (_ bv4294967295 32)) (_ bv0 32)) .cse0 .cse1 (not (fp.eq main_~y~0 main_~y~0))))) [2018-12-03 06:13:40,027 INFO L448 ceAbstractionStarter]: For program point L68-1(line 68) no Hoare annotation was computed. [2018-12-03 06:13:40,027 INFO L448 ceAbstractionStarter]: For program point L68-2(line 68) no Hoare annotation was computed. [2018-12-03 06:13:40,027 INFO L448 ceAbstractionStarter]: For program point fmax_floatEXIT(lines 43 52) no Hoare annotation was computed. [2018-12-03 06:13:40,027 INFO L451 ceAbstractionStarter]: At program point fmax_floatENTRY(lines 43 52) the Hoare annotation is: true [2018-12-03 06:13:40,027 INFO L448 ceAbstractionStarter]: For program point L51(line 51) no Hoare annotation was computed. [2018-12-03 06:13:40,027 INFO L448 ceAbstractionStarter]: For program point L51-2(line 51) no Hoare annotation was computed. [2018-12-03 06:13:40,027 INFO L444 ceAbstractionStarter]: At program point L48(line 48) the Hoare annotation is: (and (= |fmax_float_#in~y| fmax_float_~y) (= |fmax_float_#in~x| fmax_float_~x)) [2018-12-03 06:13:40,027 INFO L448 ceAbstractionStarter]: For program point L48-1(lines 48 50) no Hoare annotation was computed. [2018-12-03 06:13:40,027 INFO L444 ceAbstractionStarter]: At program point L44(line 44) the Hoare annotation is: (and (= |fmax_float_#in~y| fmax_float_~y) (= |fmax_float_#in~x| fmax_float_~x)) [2018-12-03 06:13:40,028 INFO L448 ceAbstractionStarter]: For program point L44-1(lines 44 46) no Hoare annotation was computed. [2018-12-03 06:13:40,028 INFO L448 ceAbstractionStarter]: For program point fmax_floatFINAL(lines 43 52) no Hoare annotation was computed. [2018-12-03 06:13:40,028 INFO L448 ceAbstractionStarter]: For program point L31(lines 31 40) no Hoare annotation was computed. [2018-12-03 06:13:40,028 INFO L448 ceAbstractionStarter]: For program point __fpclassify_floatFINAL(lines 20 41) no Hoare annotation was computed. [2018-12-03 06:13:40,028 INFO L448 ceAbstractionStarter]: For program point L23-1(lines 23 27) no Hoare annotation was computed. [2018-12-03 06:13:40,028 INFO L444 ceAbstractionStarter]: At program point L23-2(lines 23 27) the Hoare annotation is: (= __fpclassify_float_~x |__fpclassify_float_#in~x|) [2018-12-03 06:13:40,028 INFO L448 ceAbstractionStarter]: For program point L23-3(lines 20 41) no Hoare annotation was computed. [2018-12-03 06:13:40,028 INFO L448 ceAbstractionStarter]: For program point L34(lines 34 40) no Hoare annotation was computed. [2018-12-03 06:13:40,028 INFO L451 ceAbstractionStarter]: At program point __fpclassify_floatENTRY(lines 20 41) the Hoare annotation is: true [2018-12-03 06:13:40,028 INFO L448 ceAbstractionStarter]: For program point __fpclassify_floatEXIT(lines 20 41) no Hoare annotation was computed. [2018-12-03 06:13:40,028 INFO L448 ceAbstractionStarter]: For program point L37(lines 37 40) no Hoare annotation was computed. [2018-12-03 06:13:40,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 06:13:40 BoogieIcfgContainer [2018-12-03 06:13:40,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 06:13:40,039 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 06:13:40,039 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 06:13:40,039 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 06:13:40,039 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:13:11" (3/4) ... [2018-12-03 06:13:40,042 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-03 06:13:40,047 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2018-12-03 06:13:40,048 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-03 06:13:40,048 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-03 06:13:40,048 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fmax_float [2018-12-03 06:13:40,048 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2018-12-03 06:13:40,052 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2018-12-03 06:13:40,052 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-12-03 06:13:40,053 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-03 06:13:40,076 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: x == \old(x) [2018-12-03 06:13:40,095 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b6ee7f2a-fb31-4333-8043-1c7207d6938a/bin-2019/utaipan/witness.graphml [2018-12-03 06:13:40,096 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 06:13:40,096 INFO L168 Benchmark]: Toolchain (without parser) took 28994.21 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 385.4 MB). Free memory was 943.4 MB in the beginning and 870.5 MB in the end (delta: 72.9 MB). Peak memory consumption was 458.2 MB. Max. memory is 11.5 GB. [2018-12-03 06:13:40,097 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 06:13:40,097 INFO L168 Benchmark]: CACSL2BoogieTranslator took 144.36 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. [2018-12-03 06:13:40,097 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.51 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. [2018-12-03 06:13:40,098 INFO L168 Benchmark]: Boogie Preprocessor took 19.81 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. [2018-12-03 06:13:40,098 INFO L168 Benchmark]: RCFGBuilder took 252.97 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 927.3 MB in the beginning and 1.1 GB in the end (delta: -154.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. [2018-12-03 06:13:40,098 INFO L168 Benchmark]: TraceAbstraction took 28501.58 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 266.3 MB). Free memory was 1.1 GB in the beginning and 881.8 MB in the end (delta: 200.2 MB). Peak memory consumption was 466.5 MB. Max. memory is 11.5 GB. [2018-12-03 06:13:40,098 INFO L168 Benchmark]: Witness Printer took 56.99 ms. Allocated memory is still 1.4 GB. Free memory was 881.8 MB in the beginning and 870.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 11.5 GB. [2018-12-03 06:13:40,100 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 144.36 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 15.51 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 19.81 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 252.97 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 927.3 MB in the beginning and 1.1 GB in the end (delta: -154.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 28501.58 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 266.3 MB). Free memory was 1.1 GB in the beginning and 881.8 MB in the end (delta: 200.2 MB). Peak memory consumption was 466.5 MB. Max. memory is 11.5 GB. * Witness Printer took 56.99 ms. Allocated memory is still 1.4 GB. Free memory was 881.8 MB in the beginning and 870.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 80]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 74]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: x == \old(x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 2 error locations. SAFE Result, 28.4s OverallTime, 30 OverallIterations, 6 TraceHistogramMax, 15.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 2057 SDtfs, 1208 SDslu, 12572 SDs, 0 SdLazy, 6208 SolverSat, 378 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3551 GetRequests, 3157 SyntacticMatches, 13 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 30 MinimizatonAttempts, 317 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 169 PreInvPairs, 193 NumberOfFragments, 163 HoareAnnotationTreeSize, 169 FomulaSimplifications, 18973 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 19 FomulaSimplificationsInter, 71 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 10.8s InterpolantComputationTime, 2386 NumberOfCodeBlocks, 2386 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 3317 ConstructedInterpolants, 35 QuantifiedInterpolants, 631572 SizeOfPredicates, 209 NumberOfNonLiveVariables, 5124 ConjunctsInSsa, 446 ConjunctsInUnsatCore, 57 InterpolantComputations, 22 PerfectInterpolantSequences, 1646/1870 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...