./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 65a8838494b0fa2a560742eb829642f08a5d8cc8 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 65a8838494b0fa2a560742eb829642f08a5d8cc8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 17:47:16,903 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 17:47:16,904 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 17:47:16,912 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 17:47:16,912 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 17:47:16,913 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 17:47:16,913 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 17:47:16,914 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 17:47:16,915 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 17:47:16,916 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 17:47:16,917 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 17:47:16,917 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 17:47:16,917 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 17:47:16,918 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 17:47:16,919 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 17:47:16,919 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 17:47:16,920 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 17:47:16,921 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 17:47:16,922 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 17:47:16,923 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 17:47:16,924 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 17:47:16,925 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 17:47:16,926 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 17:47:16,927 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 17:47:16,927 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 17:47:16,928 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 17:47:16,928 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 17:47:16,929 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 17:47:16,929 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 17:47:16,930 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 17:47:16,930 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 17:47:16,931 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 17:47:16,931 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 17:47:16,931 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 17:47:16,932 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 17:47:16,932 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 17:47:16,932 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 17:47:16,942 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 17:47:16,943 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 17:47:16,943 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 17:47:16,943 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 17:47:16,943 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 17:47:16,944 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 17:47:16,944 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 17:47:16,944 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 17:47:16,944 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 17:47:16,944 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 17:47:16,944 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 17:47:16,944 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 17:47:16,944 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 17:47:16,945 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 17:47:16,945 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 17:47:16,945 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 17:47:16,945 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 17:47:16,945 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 17:47:16,945 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 17:47:16,946 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 17:47:16,946 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 17:47:16,946 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 17:47:16,946 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 17:47:16,946 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 17:47:16,946 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 17:47:16,946 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 17:47:16,947 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 17:47:16,947 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 17:47:16,947 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 17:47:16,947 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 17:47:16,947 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 17:47:16,947 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 17:47:16,947 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 17:47:16,947 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 17:47:16,947 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 17:47:16,947 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 17:47:16,947 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 17:47:16,947 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_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65a8838494b0fa2a560742eb829642f08a5d8cc8 [2018-11-18 17:47:16,970 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 17:47:16,979 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 17:47:16,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 17:47:16,982 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 17:47:16,983 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 17:47:16,983 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-11-18 17:47:17,028 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/data/cd5c496df/7a4c06eac9a14d73a234e25b6a90f7b5/FLAGd97a05f02 [2018-11-18 17:47:17,413 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 17:47:17,413 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-11-18 17:47:17,418 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/data/cd5c496df/7a4c06eac9a14d73a234e25b6a90f7b5/FLAGd97a05f02 [2018-11-18 17:47:17,426 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/data/cd5c496df/7a4c06eac9a14d73a234e25b6a90f7b5 [2018-11-18 17:47:17,428 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 17:47:17,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 17:47:17,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 17:47:17,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 17:47:17,432 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 17:47:17,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:47:17" (1/1) ... [2018-11-18 17:47:17,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f4c8aae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:17, skipping insertion in model container [2018-11-18 17:47:17,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:47:17" (1/1) ... [2018-11-18 17:47:17,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 17:47:17,455 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 17:47:17,570 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:47:17,572 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 17:47:17,587 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:47:17,603 INFO L195 MainTranslator]: Completed translation [2018-11-18 17:47:17,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:17 WrapperNode [2018-11-18 17:47:17,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 17:47:17,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 17:47:17,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 17:47:17,605 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 17:47:17,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:17" (1/1) ... [2018-11-18 17:47:17,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:17" (1/1) ... [2018-11-18 17:47:17,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 17:47:17,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 17:47:17,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 17:47:17,628 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 17:47:17,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:17" (1/1) ... [2018-11-18 17:47:17,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:17" (1/1) ... [2018-11-18 17:47:17,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:17" (1/1) ... [2018-11-18 17:47:17,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:17" (1/1) ... [2018-11-18 17:47:17,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:17" (1/1) ... [2018-11-18 17:47:17,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:17" (1/1) ... [2018-11-18 17:47:17,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:17" (1/1) ... [2018-11-18 17:47:17,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 17:47:17,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 17:47:17,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 17:47:17,691 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 17:47:17,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 17:47:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 17:47:17,727 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 17:47:17,727 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-11-18 17:47:17,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-11-18 17:47:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-11-18 17:47:17,728 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-11-18 17:47:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2018-11-18 17:47:17,728 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2018-11-18 17:47:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 17:47:17,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 17:47:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2018-11-18 17:47:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 17:47:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 17:47:17,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 17:47:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 17:47:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 17:47:17,940 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 17:47:17,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:47:17 BoogieIcfgContainer [2018-11-18 17:47:17,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 17:47:17,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 17:47:17,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 17:47:17,944 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 17:47:17,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 05:47:17" (1/3) ... [2018-11-18 17:47:17,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eefdf37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 05:47:17, skipping insertion in model container [2018-11-18 17:47:17,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:17" (2/3) ... [2018-11-18 17:47:17,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eefdf37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 05:47:17, skipping insertion in model container [2018-11-18 17:47:17,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:47:17" (3/3) ... [2018-11-18 17:47:17,947 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231_true-unreach-call.c [2018-11-18 17:47:17,955 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 17:47:17,962 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-11-18 17:47:17,975 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-11-18 17:47:18,002 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 17:47:18,003 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 17:47:18,003 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 17:47:18,003 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 17:47:18,003 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 17:47:18,003 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 17:47:18,003 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 17:47:18,003 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 17:47:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2018-11-18 17:47:18,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-18 17:47:18,025 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:18,026 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:18,028 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:18,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:18,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1099388114, now seen corresponding path program 1 times [2018-11-18 17:47:18,034 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:47:18,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:47:18,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:18,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:47:18,074 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:47:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 17:47:18,152 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:18,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 17:47:18,152 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:47:18,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 17:47:18,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 17:47:18,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 17:47:18,169 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2018-11-18 17:47:18,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:18,188 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions. [2018-11-18 17:47:18,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 17:47:18,190 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 36 [2018-11-18 17:47:18,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:18,196 INFO L225 Difference]: With dead ends: 109 [2018-11-18 17:47:18,196 INFO L226 Difference]: Without dead ends: 61 [2018-11-18 17:47:18,199 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 17:47:18,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-18 17:47:18,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-11-18 17:47:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-18 17:47:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-11-18 17:47:18,231 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-11-18 17:47:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:18,232 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-11-18 17:47:18,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 17:47:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-11-18 17:47:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 17:47:18,234 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:18,234 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:18,234 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:18,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:18,235 INFO L82 PathProgramCache]: Analyzing trace with hash -451170303, now seen corresponding path program 1 times [2018-11-18 17:47:18,235 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:47:18,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:47:18,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:18,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:47:18,236 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:47:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 17:47:18,292 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:18,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:47:18,292 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:47:18,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 17:47:18,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 17:47:18,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:18,294 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-11-18 17:47:18,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:18,366 INFO L93 Difference]: Finished difference Result 112 states and 147 transitions. [2018-11-18 17:47:18,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 17:47:18,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-11-18 17:47:18,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:18,370 INFO L225 Difference]: With dead ends: 112 [2018-11-18 17:47:18,370 INFO L226 Difference]: Without dead ends: 70 [2018-11-18 17:47:18,371 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-18 17:47:18,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-11-18 17:47:18,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2018-11-18 17:47:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-18 17:47:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2018-11-18 17:47:18,380 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 37 [2018-11-18 17:47:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:18,380 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2018-11-18 17:47:18,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 17:47:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2018-11-18 17:47:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-18 17:47:18,381 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:18,381 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:18,382 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:18,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:18,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1810080466, now seen corresponding path program 1 times [2018-11-18 17:47:18,382 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:47:18,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:47:18,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:18,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:47:18,383 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:47:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-18 17:47:18,446 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:18,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:47:18,446 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:47:18,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 17:47:18,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 17:47:18,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:18,447 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2018-11-18 17:47:18,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:18,474 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2018-11-18 17:47:18,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 17:47:18,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-11-18 17:47:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:18,476 INFO L225 Difference]: With dead ends: 89 [2018-11-18 17:47:18,476 INFO L226 Difference]: Without dead ends: 67 [2018-11-18 17:47:18,476 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-18 17:47:18,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-11-18 17:47:18,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-18 17:47:18,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-11-18 17:47:18,481 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 42 [2018-11-18 17:47:18,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:18,482 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-11-18 17:47:18,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 17:47:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-11-18 17:47:18,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-18 17:47:18,482 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:18,483 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:18,483 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:18,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:18,483 INFO L82 PathProgramCache]: Analyzing trace with hash 614250457, now seen corresponding path program 1 times [2018-11-18 17:47:18,483 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:47:18,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:47:18,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:18,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:47:18,484 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:47:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-18 17:47:18,520 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:18,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 17:47:18,520 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:47:18,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 17:47:18,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 17:47:18,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 17:47:18,521 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 3 states. [2018-11-18 17:47:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:18,530 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2018-11-18 17:47:18,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 17:47:18,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2018-11-18 17:47:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:18,532 INFO L225 Difference]: With dead ends: 70 [2018-11-18 17:47:18,532 INFO L226 Difference]: Without dead ends: 68 [2018-11-18 17:47:18,532 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 17:47:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-18 17:47:18,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-11-18 17:47:18,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-18 17:47:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2018-11-18 17:47:18,539 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 45 [2018-11-18 17:47:18,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:18,539 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2018-11-18 17:47:18,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 17:47:18,539 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2018-11-18 17:47:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-18 17:47:18,540 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:18,540 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:18,541 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:18,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:18,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1422493423, now seen corresponding path program 1 times [2018-11-18 17:47:18,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:47:18,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:47:18,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:18,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:47:18,542 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:47:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 17:47:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 17:47:18,594 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 17:47:18,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 05:47:18 BoogieIcfgContainer [2018-11-18 17:47:18,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 17:47:18,620 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 17:47:18,620 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 17:47:18,621 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 17:47:18,621 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:47:17" (3/4) ... [2018-11-18 17:47:18,624 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-18 17:47:18,624 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 17:47:18,624 INFO L168 Benchmark]: Toolchain (without parser) took 1196.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 962.3 MB in the beginning and 1.0 GB in the end (delta: -81.3 MB). Peak memory consumption was 67.1 MB. Max. memory is 11.5 GB. [2018-11-18 17:47:18,626 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 982.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:47:18,626 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.94 ms. Allocated memory is still 1.0 GB. Free memory was 962.3 MB in the beginning and 946.2 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-18 17:47:18,626 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.59 ms. Allocated memory is still 1.0 GB. Free memory is still 946.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:47:18,627 INFO L168 Benchmark]: Boogie Preprocessor took 63.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -193.1 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 17:47:18,627 INFO L168 Benchmark]: RCFGBuilder took 249.14 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. [2018-11-18 17:47:18,627 INFO L168 Benchmark]: TraceAbstraction took 679.22 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: 77.3 MB). Peak memory consumption was 77.3 MB. Max. memory is 11.5 GB. [2018-11-18 17:47:18,628 INFO L168 Benchmark]: Witness Printer took 3.57 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:47:18,630 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 982.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 174.94 ms. Allocated memory is still 1.0 GB. Free memory was 962.3 MB in the beginning and 946.2 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.59 ms. Allocated memory is still 1.0 GB. Free memory is still 946.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 63.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -193.1 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 249.14 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 679.22 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: 77.3 MB). Peak memory consumption was 77.3 MB. Max. memory is 11.5 GB. * Witness Printer took 3.57 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: 75]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 74. Possible FailurePath: [L66] float x = __VERIFIER_nondet_float(); [L67] float y = __VERIFIER_nondet_float(); [L68] CALL, EXPR isnan_float(x) VAL [\old(x)=2139095044] [L57] RET return x != x; VAL [\old(x)=2139095044, \result=1, x=2139095044] [L68] EXPR isnan_float(x) VAL [isnan_float(x)=1, x=2139095044, y=2139095043] [L68] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, x=2139095044, y=2139095043] [L68] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L57] RET return x != x; VAL [\old(x)=2139095043, \result=0, x=2139095043] [L68] EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095044, y=2139095043] [L68] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095044, y=2139095043] [L68-L69] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) VAL [(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))=1, isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095044, y=2139095043] [L68-L69] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L71] CALL, EXPR fmin_float(x, y) VAL [\old(x)=2139095044, \old(y)=2139095043] [L36] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=2139095044] [L13] __uint32_t w; VAL [\old(x)=2139095044, x=2139095044] [L16] FCALL ieee_float_shape_type gf_u; [L17] FCALL gf_u.value = (x) [L18] EXPR, FCALL gf_u.word [L18] (w) = gf_u.word [L19] COND FALSE !(0) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L21] COND FALSE !(w == 0x00000000 || w == 0x80000000) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L23-L24] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L26-L27] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L29] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L32] RET return 0; VAL [\old(x)=2139095044, \result=0, w=2139095041, x=2139095044] [L36] EXPR __fpclassify_float(x) VAL [\old(x)=2139095044, \old(y)=2139095043, __fpclassify_float(x)=0, x=2139095044, y=2139095043] [L36] COND TRUE __fpclassify_float(x) == 0 [L37] RET return y; VAL [\old(x)=2139095044, \old(y)=2139095043, \result=2139095043, x=2139095044, y=2139095043] [L71] EXPR fmin_float(x, y) VAL [fmin_float(x, y)=2139095043, x=2139095044, y=2139095043] [L71] float res = fmin_float(x, y); [L74] CALL, EXPR isnan_float(x) VAL [\old(x)=2139095044] [L57] RET return x != x; VAL [\old(x)=2139095044, \result=1, x=2139095044] [L74] EXPR isnan_float(x) VAL [isnan_float(x)=1, res=2139095043, x=2139095044, y=2139095043] [L74] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, res=2139095043, x=2139095044, y=2139095043] [L74] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L57] RET return x != x; VAL [\old(x)=2139095043, \result=0, x=2139095043] [L74] EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=2139095043, x=2139095044, y=2139095043] [L74] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=2139095043, x=2139095044, y=2139095043] [L74] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L75] __VERIFIER_error() VAL [res=2139095043, x=2139095044, y=2139095043] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 66 locations, 2 error locations. UNSAFE Result, 0.6s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 324 SDtfs, 16 SDslu, 367 SDs, 0 SdLazy, 28 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 210 NumberOfCodeBlocks, 210 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 156 ConstructedInterpolants, 0 QuantifiedInterpolants, 6582 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 24/24 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-5842f4b [2018-11-18 17:47:20,041 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 17:47:20,042 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 17:47:20,049 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 17:47:20,050 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 17:47:20,050 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 17:47:20,051 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 17:47:20,052 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 17:47:20,053 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 17:47:20,054 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 17:47:20,054 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 17:47:20,055 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 17:47:20,055 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 17:47:20,056 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 17:47:20,057 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 17:47:20,057 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 17:47:20,058 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 17:47:20,059 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 17:47:20,060 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 17:47:20,061 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 17:47:20,062 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 17:47:20,063 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 17:47:20,065 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 17:47:20,065 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 17:47:20,065 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 17:47:20,066 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 17:47:20,066 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 17:47:20,067 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 17:47:20,067 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 17:47:20,068 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 17:47:20,068 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 17:47:20,069 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 17:47:20,069 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 17:47:20,069 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 17:47:20,070 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 17:47:20,070 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 17:47:20,070 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-11-18 17:47:20,081 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 17:47:20,081 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 17:47:20,082 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 17:47:20,082 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 17:47:20,082 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 17:47:20,082 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 17:47:20,082 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 17:47:20,082 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 17:47:20,083 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 17:47:20,083 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 17:47:20,083 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 17:47:20,083 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 17:47:20,083 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 17:47:20,084 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 17:47:20,084 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 17:47:20,084 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 17:47:20,084 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 17:47:20,084 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-18 17:47:20,084 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-18 17:47:20,084 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 17:47:20,085 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 17:47:20,085 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 17:47:20,085 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 17:47:20,085 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 17:47:20,085 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 17:47:20,085 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 17:47:20,085 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 17:47:20,086 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 17:47:20,086 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 17:47:20,086 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 17:47:20,086 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 17:47:20,086 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-11-18 17:47:20,086 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 17:47:20,086 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-18 17:47:20,086 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-18 17:47:20,087 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_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65a8838494b0fa2a560742eb829642f08a5d8cc8 [2018-11-18 17:47:20,113 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 17:47:20,122 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 17:47:20,124 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 17:47:20,125 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 17:47:20,125 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 17:47:20,125 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-11-18 17:47:20,160 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/data/0eaf6d579/1ed3f00e0cd04e79b515e9b9f237628a/FLAG0ce2e495e [2018-11-18 17:47:20,554 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 17:47:20,555 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-11-18 17:47:20,560 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/data/0eaf6d579/1ed3f00e0cd04e79b515e9b9f237628a/FLAG0ce2e495e [2018-11-18 17:47:20,569 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/data/0eaf6d579/1ed3f00e0cd04e79b515e9b9f237628a [2018-11-18 17:47:20,571 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 17:47:20,571 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 17:47:20,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 17:47:20,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 17:47:20,575 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 17:47:20,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:47:20" (1/1) ... [2018-11-18 17:47:20,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a4379e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:20, skipping insertion in model container [2018-11-18 17:47:20,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:47:20" (1/1) ... [2018-11-18 17:47:20,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 17:47:20,597 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 17:47:20,719 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:47:20,723 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 17:47:20,742 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:47:20,758 INFO L195 MainTranslator]: Completed translation [2018-11-18 17:47:20,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:20 WrapperNode [2018-11-18 17:47:20,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 17:47:20,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 17:47:20,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 17:47:20,760 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 17:47:20,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:20" (1/1) ... [2018-11-18 17:47:20,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:20" (1/1) ... [2018-11-18 17:47:20,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 17:47:20,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 17:47:20,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 17:47:20,779 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 17:47:20,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:20" (1/1) ... [2018-11-18 17:47:20,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:20" (1/1) ... [2018-11-18 17:47:20,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:20" (1/1) ... [2018-11-18 17:47:20,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:20" (1/1) ... [2018-11-18 17:47:20,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:20" (1/1) ... [2018-11-18 17:47:20,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:20" (1/1) ... [2018-11-18 17:47:20,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:20" (1/1) ... [2018-11-18 17:47:20,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 17:47:20,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 17:47:20,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 17:47:20,806 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 17:47:20,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 17:47:20,887 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 17:47:20,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 17:47:20,888 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-11-18 17:47:20,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-11-18 17:47:20,888 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-11-18 17:47:20,888 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-11-18 17:47:20,888 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2018-11-18 17:47:20,888 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2018-11-18 17:47:20,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 17:47:20,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 17:47:20,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 17:47:20,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-11-18 17:47:20,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 17:47:20,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 17:47:20,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2018-11-18 17:47:20,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 17:47:21,071 WARN L317 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-18 17:47:21,094 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 17:47:21,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:47:21 BoogieIcfgContainer [2018-11-18 17:47:21,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 17:47:21,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 17:47:21,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 17:47:21,098 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 17:47:21,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 05:47:20" (1/3) ... [2018-11-18 17:47:21,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54085c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 05:47:21, skipping insertion in model container [2018-11-18 17:47:21,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:47:20" (2/3) ... [2018-11-18 17:47:21,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54085c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 05:47:21, skipping insertion in model container [2018-11-18 17:47:21,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:47:21" (3/3) ... [2018-11-18 17:47:21,100 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231_true-unreach-call.c [2018-11-18 17:47:21,106 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 17:47:21,110 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-11-18 17:47:21,119 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-11-18 17:47:21,139 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 17:47:21,140 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 17:47:21,140 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 17:47:21,140 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 17:47:21,140 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 17:47:21,140 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 17:47:21,140 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 17:47:21,140 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 17:47:21,140 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 17:47:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-11-18 17:47:21,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-18 17:47:21,159 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:21,159 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:21,161 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:21,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:21,165 INFO L82 PathProgramCache]: Analyzing trace with hash 112330547, now seen corresponding path program 1 times [2018-11-18 17:47:21,168 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:21,168 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:21,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:21,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:47:21,247 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:21,255 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:21,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 17:47:21,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 17:47:21,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 17:47:21,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 17:47:21,270 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-11-18 17:47:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:21,287 INFO L93 Difference]: Finished difference Result 105 states and 146 transitions. [2018-11-18 17:47:21,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 17:47:21,288 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 35 [2018-11-18 17:47:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:21,297 INFO L225 Difference]: With dead ends: 105 [2018-11-18 17:47:21,297 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 17:47:21,300 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 17:47:21,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 17:47:21,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-11-18 17:47:21,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-18 17:47:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2018-11-18 17:47:21,332 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 35 [2018-11-18 17:47:21,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:21,333 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2018-11-18 17:47:21,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 17:47:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2018-11-18 17:47:21,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-18 17:47:21,335 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:21,335 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:21,335 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:21,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:21,335 INFO L82 PathProgramCache]: Analyzing trace with hash -871618014, now seen corresponding path program 1 times [2018-11-18 17:47:21,336 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:21,336 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:21,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:21,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:47:21,428 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:21,435 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:21,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:47:21,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 17:47:21,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 17:47:21,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:21,437 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2018-11-18 17:47:21,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:21,481 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2018-11-18 17:47:21,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 17:47:21,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-11-18 17:47:21,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:21,483 INFO L225 Difference]: With dead ends: 108 [2018-11-18 17:47:21,483 INFO L226 Difference]: Without dead ends: 68 [2018-11-18 17:47:21,484 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-18 17:47:21,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-18 17:47:21,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2018-11-18 17:47:21,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-18 17:47:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-11-18 17:47:21,490 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-11-18 17:47:21,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:21,490 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-11-18 17:47:21,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 17:47:21,490 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-11-18 17:47:21,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-18 17:47:21,491 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:21,491 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:21,492 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:21,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:21,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1769968785, now seen corresponding path program 1 times [2018-11-18 17:47:21,492 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:21,493 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:21,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:21,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 17:47:21,555 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:21,562 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:21,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:47:21,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 17:47:21,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 17:47:21,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:21,563 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-11-18 17:47:21,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:21,603 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2018-11-18 17:47:21,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 17:47:21,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-11-18 17:47:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:21,606 INFO L225 Difference]: With dead ends: 86 [2018-11-18 17:47:21,606 INFO L226 Difference]: Without dead ends: 64 [2018-11-18 17:47:21,606 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:21,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-18 17:47:21,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-11-18 17:47:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-18 17:47:21,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-18 17:47:21,613 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 41 [2018-11-18 17:47:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:21,614 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-18 17:47:21,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 17:47:21,614 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-18 17:47:21,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-18 17:47:21,615 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:21,615 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:21,616 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:21,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:21,616 INFO L82 PathProgramCache]: Analyzing trace with hash 283620169, now seen corresponding path program 1 times [2018-11-18 17:47:21,616 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:21,616 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:21,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:21,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 17:47:21,691 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:21,702 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:21,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:47:21,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 17:47:21,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 17:47:21,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:21,703 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-11-18 17:47:21,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:21,727 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-18 17:47:21,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 17:47:21,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-11-18 17:47:21,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:21,729 INFO L225 Difference]: With dead ends: 89 [2018-11-18 17:47:21,729 INFO L226 Difference]: Without dead ends: 67 [2018-11-18 17:47:21,730 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:21,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-18 17:47:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-18 17:47:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-18 17:47:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-18 17:47:21,737 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 42 [2018-11-18 17:47:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:21,737 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-18 17:47:21,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 17:47:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-18 17:47:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 17:47:21,738 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:21,739 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:21,739 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:21,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:21,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1255608243, now seen corresponding path program 1 times [2018-11-18 17:47:21,739 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:21,740 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:21,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:21,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 17:47:21,808 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:21,814 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:21,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:47:21,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 17:47:21,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 17:47:21,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:21,816 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-11-18 17:47:21,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:21,832 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-18 17:47:21,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 17:47:21,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-11-18 17:47:21,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:21,834 INFO L225 Difference]: With dead ends: 89 [2018-11-18 17:47:21,834 INFO L226 Difference]: Without dead ends: 67 [2018-11-18 17:47:21,834 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:21,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-18 17:47:21,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-18 17:47:21,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-18 17:47:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-18 17:47:21,840 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 43 [2018-11-18 17:47:21,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:21,840 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-18 17:47:21,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 17:47:21,840 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-18 17:47:21,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-18 17:47:21,841 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:21,841 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:21,841 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:21,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:21,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1237259891, now seen corresponding path program 1 times [2018-11-18 17:47:21,842 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:21,842 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:21,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:21,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 17:47:21,886 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:21,892 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:21,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:47:21,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 17:47:21,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 17:47:21,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:21,894 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-11-18 17:47:21,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:21,911 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-18 17:47:21,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 17:47:21,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-11-18 17:47:21,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:21,912 INFO L225 Difference]: With dead ends: 89 [2018-11-18 17:47:21,912 INFO L226 Difference]: Without dead ends: 67 [2018-11-18 17:47:21,913 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:21,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-18 17:47:21,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-18 17:47:21,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-18 17:47:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-18 17:47:21,917 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 44 [2018-11-18 17:47:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:21,917 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-18 17:47:21,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 17:47:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-18 17:47:21,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-18 17:47:21,918 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:21,918 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:21,918 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:21,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:21,918 INFO L82 PathProgramCache]: Analyzing trace with hash 270291918, now seen corresponding path program 1 times [2018-11-18 17:47:21,918 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:21,918 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:21,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:21,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 17:47:22,082 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 17:47:22,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:47:22,355 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:47:22,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:22,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-18 17:47:22,402 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:22,417 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:47:22,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 14 [2018-11-18 17:47:22,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 17:47:22,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 17:47:22,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-11-18 17:47:22,418 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 14 states. [2018-11-18 17:47:22,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:22,794 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2018-11-18 17:47:22,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 17:47:22,795 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2018-11-18 17:47:22,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:22,796 INFO L225 Difference]: With dead ends: 105 [2018-11-18 17:47:22,796 INFO L226 Difference]: Without dead ends: 91 [2018-11-18 17:47:22,796 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-11-18 17:47:22,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-11-18 17:47:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2018-11-18 17:47:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-11-18 17:47:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2018-11-18 17:47:22,804 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 44 [2018-11-18 17:47:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:22,804 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2018-11-18 17:47:22,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 17:47:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2018-11-18 17:47:22,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-18 17:47:22,805 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:22,805 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:22,805 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:22,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:22,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1002163962, now seen corresponding path program 1 times [2018-11-18 17:47:22,806 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:22,806 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:22,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:22,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 17:47:22,981 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 17:47:23,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:47:23,267 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:47:23,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:23,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-18 17:47:23,508 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 17:47:23,824 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:47:23,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11, 11] total 29 [2018-11-18 17:47:23,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-18 17:47:23,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-18 17:47:23,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2018-11-18 17:47:23,825 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand 29 states. [2018-11-18 17:47:25,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:25,668 INFO L93 Difference]: Finished difference Result 136 states and 179 transitions. [2018-11-18 17:47:25,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-18 17:47:25,668 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 49 [2018-11-18 17:47:25,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:25,669 INFO L225 Difference]: With dead ends: 136 [2018-11-18 17:47:25,669 INFO L226 Difference]: Without dead ends: 134 [2018-11-18 17:47:25,670 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2018-11-18 17:47:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-18 17:47:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2018-11-18 17:47:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-18 17:47:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2018-11-18 17:47:25,681 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 49 [2018-11-18 17:47:25,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:25,681 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2018-11-18 17:47:25,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-18 17:47:25,682 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2018-11-18 17:47:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-18 17:47:25,683 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:25,683 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:25,683 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:25,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:25,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1197481561, now seen corresponding path program 1 times [2018-11-18 17:47:25,685 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:25,685 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:25,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:25,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 17:47:25,783 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:25,790 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:25,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-18 17:47:25,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 17:47:25,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 17:47:25,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-18 17:47:25,790 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand 8 states. [2018-11-18 17:47:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:26,036 INFO L93 Difference]: Finished difference Result 158 states and 208 transitions. [2018-11-18 17:47:26,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 17:47:26,037 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2018-11-18 17:47:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:26,038 INFO L225 Difference]: With dead ends: 158 [2018-11-18 17:47:26,038 INFO L226 Difference]: Without dead ends: 105 [2018-11-18 17:47:26,039 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-18 17:47:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-11-18 17:47:26,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2018-11-18 17:47:26,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-18 17:47:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2018-11-18 17:47:26,049 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 53 [2018-11-18 17:47:26,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:26,049 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2018-11-18 17:47:26,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 17:47:26,049 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2018-11-18 17:47:26,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-18 17:47:26,050 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:26,051 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:26,051 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:26,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:26,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1318963710, now seen corresponding path program 1 times [2018-11-18 17:47:26,051 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:26,052 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:26,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:26,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 17:47:26,175 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 17:47:26,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:47:26,345 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:47:26,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:26,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-18 17:47:26,380 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:26,395 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:47:26,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 13 [2018-11-18 17:47:26,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 17:47:26,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 17:47:26,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-11-18 17:47:26,396 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand 13 states. [2018-11-18 17:47:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:26,644 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2018-11-18 17:47:26,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 17:47:26,645 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2018-11-18 17:47:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:26,645 INFO L225 Difference]: With dead ends: 110 [2018-11-18 17:47:26,645 INFO L226 Difference]: Without dead ends: 106 [2018-11-18 17:47:26,646 INFO L604 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 [2018-11-18 17:47:26,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-11-18 17:47:26,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2018-11-18 17:47:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-18 17:47:26,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2018-11-18 17:47:26,652 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 58 [2018-11-18 17:47:26,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:26,652 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2018-11-18 17:47:26,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 17:47:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2018-11-18 17:47:26,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 17:47:26,653 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:26,653 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:26,653 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:26,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:26,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1109305271, now seen corresponding path program 1 times [2018-11-18 17:47:26,654 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:26,654 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:26,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:26,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 17:47:26,740 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:26,747 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:26,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:47:26,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 17:47:26,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 17:47:26,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:26,748 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand 4 states. [2018-11-18 17:47:26,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:26,761 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2018-11-18 17:47:26,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 17:47:26,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2018-11-18 17:47:26,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:26,762 INFO L225 Difference]: With dead ends: 119 [2018-11-18 17:47:26,762 INFO L226 Difference]: Without dead ends: 92 [2018-11-18 17:47:26,763 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-11-18 17:47:26,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-11-18 17:47:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-18 17:47:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-11-18 17:47:26,771 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 61 [2018-11-18 17:47:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:26,771 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-11-18 17:47:26,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 17:47:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-11-18 17:47:26,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-11-18 17:47:26,771 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:26,772 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:26,772 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:26,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:26,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1087698055, now seen corresponding path program 1 times [2018-11-18 17:47:26,772 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:26,772 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:26,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:26,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 17:47:26,823 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:26,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:26,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:47:26,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 17:47:26,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 17:47:26,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:26,831 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 4 states. [2018-11-18 17:47:26,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:26,847 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2018-11-18 17:47:26,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 17:47:26,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2018-11-18 17:47:26,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:26,848 INFO L225 Difference]: With dead ends: 122 [2018-11-18 17:47:26,848 INFO L226 Difference]: Without dead ends: 95 [2018-11-18 17:47:26,848 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:26,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-18 17:47:26,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2018-11-18 17:47:26,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-18 17:47:26,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-11-18 17:47:26,855 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 62 [2018-11-18 17:47:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:26,856 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-11-18 17:47:26,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 17:47:26,856 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-11-18 17:47:26,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-18 17:47:26,856 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:26,857 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:26,857 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:26,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:26,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1198208602, now seen corresponding path program 1 times [2018-11-18 17:47:26,857 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:26,857 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:26,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:26,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 17:47:26,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-18 17:47:27,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:47:27,179 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:47:27,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:27,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-18 17:47:27,264 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-18 17:47:27,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 17:47:27,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 12] total 17 [2018-11-18 17:47:27,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 17:47:27,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 17:47:27,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-11-18 17:47:27,420 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 17 states. [2018-11-18 17:47:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:27,819 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2018-11-18 17:47:27,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 17:47:27,820 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-11-18 17:47:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:27,821 INFO L225 Difference]: With dead ends: 132 [2018-11-18 17:47:27,821 INFO L226 Difference]: Without dead ends: 102 [2018-11-18 17:47:27,821 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2018-11-18 17:47:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-11-18 17:47:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2018-11-18 17:47:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-18 17:47:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2018-11-18 17:47:27,828 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 63 [2018-11-18 17:47:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:27,828 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2018-11-18 17:47:27,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 17:47:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2018-11-18 17:47:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-18 17:47:27,829 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:27,830 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:27,830 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:27,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:27,830 INFO L82 PathProgramCache]: Analyzing trace with hash -171077194, now seen corresponding path program 1 times [2018-11-18 17:47:27,830 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:27,831 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:27,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:27,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-18 17:47:28,020 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:28,032 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:28,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-11-18 17:47:28,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 17:47:28,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 17:47:28,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-11-18 17:47:28,033 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand 11 states. [2018-11-18 17:47:28,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:28,939 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2018-11-18 17:47:28,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 17:47:28,939 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-11-18 17:47:28,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:28,940 INFO L225 Difference]: With dead ends: 120 [2018-11-18 17:47:28,940 INFO L226 Difference]: Without dead ends: 118 [2018-11-18 17:47:28,940 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-11-18 17:47:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-11-18 17:47:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 93. [2018-11-18 17:47:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-18 17:47:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 120 transitions. [2018-11-18 17:47:28,947 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 120 transitions. Word has length 56 [2018-11-18 17:47:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:28,947 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 120 transitions. [2018-11-18 17:47:28,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 17:47:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 120 transitions. [2018-11-18 17:47:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-18 17:47:28,948 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:28,948 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:28,949 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:28,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:28,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1823067512, now seen corresponding path program 1 times [2018-11-18 17:47:28,949 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:28,949 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:28,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:28,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 17:47:29,121 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:29,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:47:29,279 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:47:29,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:29,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 17:47:29,318 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:29,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:47:29,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-18 17:47:29,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 17:47:29,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 17:47:29,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-18 17:47:29,489 INFO L87 Difference]: Start difference. First operand 93 states and 120 transitions. Second operand 8 states. [2018-11-18 17:47:30,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:30,049 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2018-11-18 17:47:30,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 17:47:30,049 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2018-11-18 17:47:30,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:30,049 INFO L225 Difference]: With dead ends: 125 [2018-11-18 17:47:30,050 INFO L226 Difference]: Without dead ends: 105 [2018-11-18 17:47:30,050 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-11-18 17:47:30,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-11-18 17:47:30,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2018-11-18 17:47:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-11-18 17:47:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2018-11-18 17:47:30,058 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 56 [2018-11-18 17:47:30,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:30,058 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2018-11-18 17:47:30,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 17:47:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2018-11-18 17:47:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-18 17:47:30,059 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:30,059 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:30,059 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:30,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:30,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1708258959, now seen corresponding path program 1 times [2018-11-18 17:47:30,060 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:30,060 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 22 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:30,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:30,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 17:47:30,114 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:30,121 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:30,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:47:30,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 17:47:30,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 17:47:30,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:30,122 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand 4 states. [2018-11-18 17:47:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:30,137 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2018-11-18 17:47:30,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 17:47:30,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-11-18 17:47:30,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:30,138 INFO L225 Difference]: With dead ends: 126 [2018-11-18 17:47:30,138 INFO L226 Difference]: Without dead ends: 99 [2018-11-18 17:47:30,138 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:30,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-11-18 17:47:30,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2018-11-18 17:47:30,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-11-18 17:47:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2018-11-18 17:47:30,147 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 56 [2018-11-18 17:47:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:30,148 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2018-11-18 17:47:30,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 17:47:30,148 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2018-11-18 17:47:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-18 17:47:30,149 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:30,149 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:30,149 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:30,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:30,149 INFO L82 PathProgramCache]: Analyzing trace with hash 125365206, now seen corresponding path program 1 times [2018-11-18 17:47:30,149 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:30,150 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 23 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:30,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:30,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-18 17:47:30,739 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:30,957 WARN L180 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2018-11-18 17:47:31,503 WARN L180 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2018-11-18 17:47:31,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:47:31,776 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:47:31,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:31,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 17:47:32,003 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:32,912 WARN L180 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-11-18 17:47:33,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:47:33,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 17 [2018-11-18 17:47:33,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 17:47:33,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 17:47:33,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-11-18 17:47:33,044 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand 17 states. [2018-11-18 17:47:34,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:34,611 INFO L93 Difference]: Finished difference Result 138 states and 178 transitions. [2018-11-18 17:47:34,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 17:47:34,611 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-11-18 17:47:34,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:34,612 INFO L225 Difference]: With dead ends: 138 [2018-11-18 17:47:34,612 INFO L226 Difference]: Without dead ends: 119 [2018-11-18 17:47:34,613 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2018-11-18 17:47:34,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-18 17:47:34,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 108. [2018-11-18 17:47:34,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-11-18 17:47:34,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2018-11-18 17:47:34,619 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 63 [2018-11-18 17:47:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:34,619 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2018-11-18 17:47:34,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 17:47:34,619 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2018-11-18 17:47:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-18 17:47:34,620 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:34,620 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:34,620 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:34,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:34,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1884643506, now seen corresponding path program 1 times [2018-11-18 17:47:34,621 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:34,621 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 25 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:34,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:34,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 17:47:34,813 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 17:47:35,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:47:35,156 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:47:35,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:35,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-18 17:47:35,378 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 17:47:35,737 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:47:35,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [12, 12, 12] total 31 [2018-11-18 17:47:35,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-18 17:47:35,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-18 17:47:35,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2018-11-18 17:47:35,738 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand 31 states. [2018-11-18 17:47:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:37,799 INFO L93 Difference]: Finished difference Result 177 states and 229 transitions. [2018-11-18 17:47:37,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-18 17:47:37,800 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 57 [2018-11-18 17:47:37,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:37,800 INFO L225 Difference]: With dead ends: 177 [2018-11-18 17:47:37,800 INFO L226 Difference]: Without dead ends: 175 [2018-11-18 17:47:37,801 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2018-11-18 17:47:37,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-11-18 17:47:37,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 100. [2018-11-18 17:47:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-11-18 17:47:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2018-11-18 17:47:37,808 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 57 [2018-11-18 17:47:37,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:37,809 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2018-11-18 17:47:37,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-18 17:47:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2018-11-18 17:47:37,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-18 17:47:37,810 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:37,810 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:37,810 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:37,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:37,810 INFO L82 PathProgramCache]: Analyzing trace with hash -795200601, now seen corresponding path program 1 times [2018-11-18 17:47:37,810 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:37,810 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 27 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:37,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:37,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 17:47:37,855 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:37,862 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:37,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:47:37,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 17:47:37,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 17:47:37,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:37,862 INFO L87 Difference]: Start difference. First operand 100 states and 129 transitions. Second operand 4 states. [2018-11-18 17:47:37,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:37,873 INFO L93 Difference]: Finished difference Result 131 states and 166 transitions. [2018-11-18 17:47:37,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 17:47:37,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-11-18 17:47:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:37,874 INFO L225 Difference]: With dead ends: 131 [2018-11-18 17:47:37,874 INFO L226 Difference]: Without dead ends: 102 [2018-11-18 17:47:37,874 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:37,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-11-18 17:47:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2018-11-18 17:47:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-11-18 17:47:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 125 transitions. [2018-11-18 17:47:37,883 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 125 transitions. Word has length 57 [2018-11-18 17:47:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:37,883 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 125 transitions. [2018-11-18 17:47:37,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 17:47:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 125 transitions. [2018-11-18 17:47:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-18 17:47:37,884 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:37,884 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:37,885 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:37,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:37,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1204024826, now seen corresponding path program 1 times [2018-11-18 17:47:37,885 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:37,885 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 28 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:37,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:37,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 17:47:38,306 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:38,313 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:38,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2018-11-18 17:47:38,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 17:47:38,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 17:47:38,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-11-18 17:47:38,314 INFO L87 Difference]: Start difference. First operand 98 states and 125 transitions. Second operand 15 states. [2018-11-18 17:47:39,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:39,464 INFO L93 Difference]: Finished difference Result 163 states and 212 transitions. [2018-11-18 17:47:39,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 17:47:39,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-18 17:47:39,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:39,465 INFO L225 Difference]: With dead ends: 163 [2018-11-18 17:47:39,465 INFO L226 Difference]: Without dead ends: 129 [2018-11-18 17:47:39,466 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2018-11-18 17:47:39,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-11-18 17:47:39,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 108. [2018-11-18 17:47:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-11-18 17:47:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 138 transitions. [2018-11-18 17:47:39,473 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 138 transitions. Word has length 57 [2018-11-18 17:47:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:39,473 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 138 transitions. [2018-11-18 17:47:39,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 17:47:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 138 transitions. [2018-11-18 17:47:39,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-18 17:47:39,474 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:39,474 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:39,474 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:39,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:39,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1529645649, now seen corresponding path program 1 times [2018-11-18 17:47:39,475 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:39,475 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 29 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:39,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:39,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-18 17:47:39,584 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-18 17:47:39,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:47:39,771 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:47:39,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:39,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-18 17:47:39,809 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-18 17:47:39,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 17:47:39,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9] total 13 [2018-11-18 17:47:39,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 17:47:39,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 17:47:39,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-11-18 17:47:39,933 INFO L87 Difference]: Start difference. First operand 108 states and 138 transitions. Second operand 13 states. [2018-11-18 17:47:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:40,196 INFO L93 Difference]: Finished difference Result 180 states and 218 transitions. [2018-11-18 17:47:40,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 17:47:40,196 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2018-11-18 17:47:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:40,197 INFO L225 Difference]: With dead ends: 180 [2018-11-18 17:47:40,197 INFO L226 Difference]: Without dead ends: 94 [2018-11-18 17:47:40,197 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-11-18 17:47:40,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-11-18 17:47:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2018-11-18 17:47:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-18 17:47:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2018-11-18 17:47:40,204 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 69 [2018-11-18 17:47:40,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:40,204 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2018-11-18 17:47:40,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 17:47:40,204 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2018-11-18 17:47:40,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 17:47:40,205 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:40,205 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:40,205 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:40,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:40,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1570725982, now seen corresponding path program 1 times [2018-11-18 17:47:40,205 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:40,206 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/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 [2018-11-18 17:47:40,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:40,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 17:47:40,309 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-18 17:47:40,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:47:40,559 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:47:40,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:40,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 17:47:40,647 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-18 17:47:40,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 17:47:40,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 9] total 17 [2018-11-18 17:47:40,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 17:47:40,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 17:47:40,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-11-18 17:47:40,916 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand 17 states. [2018-11-18 17:47:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:41,242 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2018-11-18 17:47:41,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 17:47:41,242 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2018-11-18 17:47:41,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:41,243 INFO L225 Difference]: With dead ends: 92 [2018-11-18 17:47:41,243 INFO L226 Difference]: Without dead ends: 60 [2018-11-18 17:47:41,244 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2018-11-18 17:47:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-18 17:47:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2018-11-18 17:47:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-18 17:47:41,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2018-11-18 17:47:41,247 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 61 [2018-11-18 17:47:41,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:41,247 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2018-11-18 17:47:41,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 17:47:41,248 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2018-11-18 17:47:41,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-18 17:47:41,248 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:41,248 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:41,248 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:41,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:41,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2067082286, now seen corresponding path program 1 times [2018-11-18 17:47:41,248 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:41,249 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 33 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:41,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:41,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 17:47:41,451 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:41,458 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:41,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-18 17:47:41,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 17:47:41,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 17:47:41,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-18 17:47:41,458 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 12 states. [2018-11-18 17:47:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:42,006 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2018-11-18 17:47:42,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 17:47:42,006 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2018-11-18 17:47:42,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:42,007 INFO L225 Difference]: With dead ends: 80 [2018-11-18 17:47:42,007 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 17:47:42,007 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-18 17:47:42,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 17:47:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-11-18 17:47:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-18 17:47:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-11-18 17:47:42,024 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 70 [2018-11-18 17:47:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:42,024 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-11-18 17:47:42,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 17:47:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-11-18 17:47:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-18 17:47:42,024 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:42,025 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:42,025 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:42,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:42,025 INFO L82 PathProgramCache]: Analyzing trace with hash -65670910, now seen corresponding path program 1 times [2018-11-18 17:47:42,025 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:42,025 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 34 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:42,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:42,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 17:47:42,334 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:42,347 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:42,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-18 17:47:42,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 17:47:42,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 17:47:42,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-18 17:47:42,348 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 12 states. [2018-11-18 17:47:43,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:43,025 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2018-11-18 17:47:43,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 17:47:43,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2018-11-18 17:47:43,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:43,026 INFO L225 Difference]: With dead ends: 82 [2018-11-18 17:47:43,026 INFO L226 Difference]: Without dead ends: 61 [2018-11-18 17:47:43,026 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-18 17:47:43,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-18 17:47:43,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-11-18 17:47:43,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-18 17:47:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-11-18 17:47:43,028 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 71 [2018-11-18 17:47:43,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:43,029 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-11-18 17:47:43,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 17:47:43,029 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-11-18 17:47:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-18 17:47:43,029 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:43,029 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:43,030 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:43,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:43,030 INFO L82 PathProgramCache]: Analyzing trace with hash 617711434, now seen corresponding path program 1 times [2018-11-18 17:47:43,030 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:43,030 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 35 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:43,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:43,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-18 17:47:43,183 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:43,479 WARN L180 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-18 17:47:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-18 17:47:43,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:47:43,886 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:47:43,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:43,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-18 17:47:44,228 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:47:44,822 WARN L180 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-18 17:47:45,006 WARN L180 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-18 17:47:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-11-18 17:47:45,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 17:47:45,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12, 13] total 34 [2018-11-18 17:47:45,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-18 17:47:45,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-18 17:47:45,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 17:47:45,065 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 34 states. [2018-11-18 17:47:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:46,311 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2018-11-18 17:47:46,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-18 17:47:46,311 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 71 [2018-11-18 17:47:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:46,312 INFO L225 Difference]: With dead ends: 102 [2018-11-18 17:47:46,312 INFO L226 Difference]: Without dead ends: 74 [2018-11-18 17:47:46,313 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 248 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=211, Invalid=1511, Unknown=0, NotChecked=0, Total=1722 [2018-11-18 17:47:46,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-11-18 17:47:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 59. [2018-11-18 17:47:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-18 17:47:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2018-11-18 17:47:46,317 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 71 [2018-11-18 17:47:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:46,317 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2018-11-18 17:47:46,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-18 17:47:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2018-11-18 17:47:46,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-18 17:47:46,318 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:46,318 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:46,318 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:46,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:46,319 INFO L82 PathProgramCache]: Analyzing trace with hash 325979094, now seen corresponding path program 1 times [2018-11-18 17:47:46,319 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:46,319 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 37 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:46,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:46,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 17:47:46,580 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:46,586 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:46,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-18 17:47:46,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 17:47:46,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 17:47:46,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-18 17:47:46,587 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 12 states. [2018-11-18 17:47:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:47,461 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2018-11-18 17:47:47,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 17:47:47,462 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2018-11-18 17:47:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:47,462 INFO L225 Difference]: With dead ends: 82 [2018-11-18 17:47:47,462 INFO L226 Difference]: Without dead ends: 61 [2018-11-18 17:47:47,462 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-18 17:47:47,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-18 17:47:47,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-11-18 17:47:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-18 17:47:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2018-11-18 17:47:47,465 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 72 [2018-11-18 17:47:47,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:47,465 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2018-11-18 17:47:47,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 17:47:47,465 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2018-11-18 17:47:47,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-18 17:47:47,465 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:47,466 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:47,466 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:47,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:47,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1940333178, now seen corresponding path program 1 times [2018-11-18 17:47:47,466 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:47,466 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 38 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:47,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:47,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 17:47:47,652 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:47,659 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:47,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-18 17:47:47,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 17:47:47,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 17:47:47,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-18 17:47:47,660 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 12 states. [2018-11-18 17:47:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:48,153 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2018-11-18 17:47:48,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 17:47:48,154 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2018-11-18 17:47:48,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:48,154 INFO L225 Difference]: With dead ends: 78 [2018-11-18 17:47:48,154 INFO L226 Difference]: Without dead ends: 57 [2018-11-18 17:47:48,154 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-18 17:47:48,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-18 17:47:48,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2018-11-18 17:47:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-18 17:47:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2018-11-18 17:47:48,157 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 73 [2018-11-18 17:47:48,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:48,157 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2018-11-18 17:47:48,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 17:47:48,157 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2018-11-18 17:47:48,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-18 17:47:48,157 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:47:48,157 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:47:48,158 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:47:48,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:47:48,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1247231481, now seen corresponding path program 1 times [2018-11-18 17:47:48,158 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-18 17:47:48,158 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/mathsat Starting monitored process 39 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with mathsat -unsat_core_generation=3 [2018-11-18 17:47:48,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:47:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:47:48,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:47:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-18 17:47:48,218 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 17:47:48,225 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:47:48,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 17:47:48,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 17:47:48,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 17:47:48,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:48,226 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 4 states. [2018-11-18 17:47:48,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:47:48,231 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-11-18 17:47:48,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 17:47:48,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2018-11-18 17:47:48,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:47:48,231 INFO L225 Difference]: With dead ends: 58 [2018-11-18 17:47:48,231 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 17:47:48,231 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:47:48,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 17:47:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 17:47:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 17:47:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 17:47:48,232 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2018-11-18 17:47:48,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:47:48,232 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 17:47:48,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 17:47:48,232 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 17:47:48,232 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 17:47:48,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 17:47:48,558 INFO L425 ceAbstractionStarter]: For program point isnan_floatFINAL(line 57) no Hoare annotation was computed. [2018-11-18 17:47:48,558 INFO L428 ceAbstractionStarter]: At program point isnan_floatENTRY(line 57) the Hoare annotation is: true [2018-11-18 17:47:48,558 INFO L425 ceAbstractionStarter]: For program point isnan_floatEXIT(line 57) no Hoare annotation was computed. [2018-11-18 17:47:48,558 INFO L428 ceAbstractionStarter]: At program point fmin_floatENTRY(lines 35 42) the Hoare annotation is: true [2018-11-18 17:47:48,558 INFO L425 ceAbstractionStarter]: For program point fmin_floatEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-18 17:47:48,558 INFO L425 ceAbstractionStarter]: For program point fmin_floatFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-18 17:47:48,558 INFO L425 ceAbstractionStarter]: For program point L41(line 41) no Hoare annotation was computed. [2018-11-18 17:47:48,558 INFO L425 ceAbstractionStarter]: For program point L41-2(line 41) no Hoare annotation was computed. [2018-11-18 17:47:48,558 INFO L421 ceAbstractionStarter]: At program point L38(line 38) the Hoare annotation is: (and (= fmin_float_~x |fmin_float_#in~x|) (= fmin_float_~y |fmin_float_#in~y|)) [2018-11-18 17:47:48,558 INFO L425 ceAbstractionStarter]: For program point L38-1(lines 38 39) no Hoare annotation was computed. [2018-11-18 17:47:48,558 INFO L421 ceAbstractionStarter]: At program point L36(line 36) the Hoare annotation is: (and (= fmin_float_~x |fmin_float_#in~x|) (= fmin_float_~y |fmin_float_#in~y|)) [2018-11-18 17:47:48,558 INFO L425 ceAbstractionStarter]: For program point L36-1(lines 36 37) no Hoare annotation was computed. [2018-11-18 17:47:48,558 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-11-18 17:47:48,558 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-11-18 17:47:48,559 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 17:47:48,559 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 17:47:48,559 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 17:47:48,559 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 17:47:48,559 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 17:47:48,559 INFO L421 ceAbstractionStarter]: At program point L68-3(line 68) the Hoare annotation is: (and (= (_ bv1 32) |main_#t~ret9|) |main_#t~short11| (not (fp.eq main_~x~0 main_~x~0))) [2018-11-18 17:47:48,559 INFO L425 ceAbstractionStarter]: For program point L68-4(line 68) no Hoare annotation was computed. [2018-11-18 17:47:48,559 INFO L425 ceAbstractionStarter]: For program point L68-6(line 68) no Hoare annotation was computed. [2018-11-18 17:47:48,559 INFO L425 ceAbstractionStarter]: For program point L68-7(lines 68 69) no Hoare annotation was computed. [2018-11-18 17:47:48,559 INFO L425 ceAbstractionStarter]: For program point L68-9(lines 68 84) no Hoare annotation was computed. [2018-11-18 17:47:48,559 INFO L425 ceAbstractionStarter]: For program point L68-11(lines 68 84) no Hoare annotation was computed. [2018-11-18 17:47:48,559 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 59 87) no Hoare annotation was computed. [2018-11-18 17:47:48,559 INFO L425 ceAbstractionStarter]: For program point L81(line 81) no Hoare annotation was computed. [2018-11-18 17:47:48,559 INFO L421 ceAbstractionStarter]: At program point L69(line 69) the Hoare annotation is: (let ((.cse0 (not |main_#t~short11|)) (.cse2 (fp.eq main_~x~0 main_~x~0)) (.cse1 (not |main_#t~short15|))) (or (and .cse0 .cse1 (= (_ bv1 32) |main_#t~ret9|) (= (bvadd |main_#t~ret10| (_ bv4294967295 32)) (_ bv0 32)) (not (fp.eq main_~y~0 main_~y~0)) (not .cse2)) (and .cse0 .cse2 .cse1 (= (_ bv0 32) |main_#t~ret9|)))) [2018-11-18 17:47:48,559 INFO L425 ceAbstractionStarter]: For program point L69-1(line 69) no Hoare annotation was computed. [2018-11-18 17:47:48,559 INFO L425 ceAbstractionStarter]: For program point L69-2(line 69) no Hoare annotation was computed. [2018-11-18 17:47:48,559 INFO L421 ceAbstractionStarter]: At program point L69-3(line 69) the Hoare annotation is: (and |main_#t~short14| (not |main_#t~short11|) (fp.eq main_~x~0 main_~x~0) (not |main_#t~short15|) (= |main_#t~ret12| (_ bv0 32)) (= (_ bv0 32) |main_#t~ret9|)) [2018-11-18 17:47:48,559 INFO L425 ceAbstractionStarter]: For program point L69-4(line 69) no Hoare annotation was computed. [2018-11-18 17:47:48,559 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 75) no Hoare annotation was computed. [2018-11-18 17:47:48,559 INFO L425 ceAbstractionStarter]: For program point L69-6(line 69) no Hoare annotation was computed. [2018-11-18 17:47:48,559 INFO L421 ceAbstractionStarter]: At program point L74(line 74) the Hoare annotation is: (or (and (= main_~y~0 main_~res~0) (not (fp.eq main_~x~0 main_~x~0))) (and (= main_~x~0 main_~res~0) (not (fp.eq main_~y~0 main_~y~0)))) [2018-11-18 17:47:48,560 INFO L425 ceAbstractionStarter]: For program point L74-1(line 74) no Hoare annotation was computed. [2018-11-18 17:47:48,560 INFO L425 ceAbstractionStarter]: For program point L74-2(line 74) no Hoare annotation was computed. [2018-11-18 17:47:48,560 INFO L421 ceAbstractionStarter]: At program point L74-3(line 74) the Hoare annotation is: (and (= main_~y~0 main_~res~0) |main_#t~short19| (= (bvadd |main_#t~ret17| (_ bv4294967295 32)) (_ bv0 32)) (not (fp.eq main_~x~0 main_~x~0))) [2018-11-18 17:47:48,560 INFO L425 ceAbstractionStarter]: For program point L74-4(line 74) no Hoare annotation was computed. [2018-11-18 17:47:48,560 INFO L425 ceAbstractionStarter]: For program point L74-6(lines 74 77) no Hoare annotation was computed. [2018-11-18 17:47:48,560 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 59 87) no Hoare annotation was computed. [2018-11-18 17:47:48,560 INFO L425 ceAbstractionStarter]: For program point L75(line 75) no Hoare annotation was computed. [2018-11-18 17:47:48,560 INFO L421 ceAbstractionStarter]: At program point L71(line 71) the Hoare annotation is: (let ((.cse1 (fp.eq main_~y~0 main_~y~0)) (.cse0 (fp.eq main_~x~0 main_~x~0))) (or (and .cse0 (not .cse1)) (and .cse1 (not .cse0)))) [2018-11-18 17:47:48,560 INFO L425 ceAbstractionStarter]: For program point L71-1(line 71) no Hoare annotation was computed. [2018-11-18 17:47:48,560 INFO L425 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 81) no Hoare annotation was computed. [2018-11-18 17:47:48,560 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 59 87) the Hoare annotation is: true [2018-11-18 17:47:48,560 INFO L421 ceAbstractionStarter]: At program point L80(line 80) the Hoare annotation is: (or (and (= main_~x~0 main_~res~0) (not (fp.eq main_~y~0 main_~y~0))) (not (fp.eq main_~x~0 main_~x~0))) [2018-11-18 17:47:48,560 INFO L425 ceAbstractionStarter]: For program point L80-1(line 80) no Hoare annotation was computed. [2018-11-18 17:47:48,560 INFO L425 ceAbstractionStarter]: For program point L80-2(line 80) no Hoare annotation was computed. [2018-11-18 17:47:48,560 INFO L421 ceAbstractionStarter]: At program point L80-3(line 80) the Hoare annotation is: (and (= main_~x~0 main_~res~0) (fp.eq main_~x~0 main_~x~0) |main_#t~short22| (not (fp.eq main_~y~0 main_~y~0))) [2018-11-18 17:47:48,560 INFO L425 ceAbstractionStarter]: For program point L80-4(line 80) no Hoare annotation was computed. [2018-11-18 17:47:48,560 INFO L425 ceAbstractionStarter]: For program point L80-6(lines 80 83) no Hoare annotation was computed. [2018-11-18 17:47:48,560 INFO L428 ceAbstractionStarter]: At program point L68(line 68) the Hoare annotation is: true [2018-11-18 17:47:48,560 INFO L425 ceAbstractionStarter]: For program point L68-1(line 68) no Hoare annotation was computed. [2018-11-18 17:47:48,560 INFO L425 ceAbstractionStarter]: For program point L68-2(line 68) no Hoare annotation was computed. [2018-11-18 17:47:48,561 INFO L425 ceAbstractionStarter]: For program point L29(lines 29 32) no Hoare annotation was computed. [2018-11-18 17:47:48,561 INFO L425 ceAbstractionStarter]: For program point __fpclassify_floatFINAL(lines 12 33) no Hoare annotation was computed. [2018-11-18 17:47:48,561 INFO L425 ceAbstractionStarter]: For program point L23(lines 23 32) no Hoare annotation was computed. [2018-11-18 17:47:48,561 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 19) no Hoare annotation was computed. [2018-11-18 17:47:48,561 INFO L421 ceAbstractionStarter]: At program point L15-3(lines 15 19) the Hoare annotation is: (= __fpclassify_float_~x |__fpclassify_float_#in~x|) [2018-11-18 17:47:48,561 INFO L425 ceAbstractionStarter]: For program point L15-4(lines 12 33) no Hoare annotation was computed. [2018-11-18 17:47:48,561 INFO L425 ceAbstractionStarter]: For program point L26(lines 26 32) no Hoare annotation was computed. [2018-11-18 17:47:48,561 INFO L428 ceAbstractionStarter]: At program point __fpclassify_floatENTRY(lines 12 33) the Hoare annotation is: true [2018-11-18 17:47:48,561 INFO L425 ceAbstractionStarter]: For program point __fpclassify_floatEXIT(lines 12 33) no Hoare annotation was computed. [2018-11-18 17:47:48,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 05:47:48 BoogieIcfgContainer [2018-11-18 17:47:48,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 17:47:48,569 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 17:47:48,569 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 17:47:48,569 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 17:47:48,569 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:47:21" (3/4) ... [2018-11-18 17:47:48,572 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 17:47:48,576 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2018-11-18 17:47:48,576 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fmin_float [2018-11-18 17:47:48,576 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 17:47:48,576 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 17:47:48,576 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2018-11-18 17:47:48,581 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2018-11-18 17:47:48,581 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-11-18 17:47:48,581 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 17:47:48,600 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: x == \old(x) [2018-11-18 17:47:48,619 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_002910bd-e3a4-4957-82d8-7ce57e90c7cf/bin-2019/utaipan/witness.graphml [2018-11-18 17:47:48,619 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 17:47:48,620 INFO L168 Benchmark]: Toolchain (without parser) took 28049.01 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 380.1 MB). Free memory was 947.6 MB in the beginning and 863.9 MB in the end (delta: 83.7 MB). Peak memory consumption was 463.8 MB. Max. memory is 11.5 GB. [2018-11-18 17:47:48,620 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:47:48,621 INFO L168 Benchmark]: CACSL2BoogieTranslator took 186.96 ms. Allocated memory is still 1.0 GB. Free memory was 947.6 MB in the beginning and 931.5 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-18 17:47:48,621 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.39 ms. Allocated memory is still 1.0 GB. Free memory is still 931.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:47:48,621 INFO L168 Benchmark]: Boogie Preprocessor took 26.76 ms. Allocated memory is still 1.0 GB. Free memory is still 931.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:47:48,621 INFO L168 Benchmark]: RCFGBuilder took 288.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 931.5 MB in the beginning and 1.1 GB in the end (delta: -176.0 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. [2018-11-18 17:47:48,621 INFO L168 Benchmark]: TraceAbstraction took 27472.82 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 241.7 MB). Free memory was 1.1 GB in the beginning and 874.8 MB in the end (delta: 232.7 MB). Peak memory consumption was 474.4 MB. Max. memory is 11.5 GB. [2018-11-18 17:47:48,621 INFO L168 Benchmark]: Witness Printer took 50.59 ms. Allocated memory is still 1.4 GB. Free memory was 874.8 MB in the beginning and 863.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-11-18 17:47:48,622 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 186.96 ms. Allocated memory is still 1.0 GB. Free memory was 947.6 MB in the beginning and 931.5 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.39 ms. Allocated memory is still 1.0 GB. Free memory is still 931.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.76 ms. Allocated memory is still 1.0 GB. Free memory is still 931.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 288.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 931.5 MB in the beginning and 1.1 GB in the end (delta: -176.0 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 27472.82 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 241.7 MB). Free memory was 1.1 GB in the beginning and 874.8 MB in the end (delta: 232.7 MB). Peak memory consumption was 474.4 MB. Max. memory is 11.5 GB. * Witness Printer took 50.59 ms. Allocated memory is still 1.4 GB. Free memory was 874.8 MB in the beginning and 863.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 81]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 75]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: x == \old(x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 2 error locations. SAFE Result, 27.4s OverallTime, 28 OverallIterations, 6 TraceHistogramMax, 14.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 1904 SDtfs, 1239 SDslu, 11897 SDs, 0 SdLazy, 6582 SolverSat, 431 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3212 GetRequests, 2820 SyntacticMatches, 10 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 9.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 28 MinimizatonAttempts, 312 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 162 PreInvPairs, 186 NumberOfFragments, 155 HoareAnnotationTreeSize, 162 FomulaSimplifications, 11863 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 19 FomulaSimplificationsInter, 58 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 10.8s InterpolantComputationTime, 2184 NumberOfCodeBlocks, 2184 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 2974 ConstructedInterpolants, 32 QuantifiedInterpolants, 547133 SizeOfPredicates, 182 NumberOfNonLiveVariables, 4581 ConjunctsInSsa, 391 ConjunctsInUnsatCore, 52 InterpolantComputations, 22 PerfectInterpolantSequences, 1450/1638 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...