./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash df3954142d6b55c98b13b60b9fbaf053d4d402ff .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash df3954142d6b55c98b13b60b9fbaf053d4d402ff .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 04:37:57,219 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 04:37:57,220 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 04:37:57,229 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 04:37:57,229 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 04:37:57,230 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 04:37:57,230 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 04:37:57,232 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 04:37:57,233 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 04:37:57,233 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 04:37:57,234 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 04:37:57,234 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 04:37:57,235 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 04:37:57,235 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 04:37:57,236 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 04:37:57,237 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 04:37:57,237 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 04:37:57,239 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 04:37:57,240 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 04:37:57,241 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 04:37:57,242 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 04:37:57,243 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 04:37:57,244 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 04:37:57,244 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 04:37:57,244 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 04:37:57,245 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 04:37:57,246 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 04:37:57,246 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 04:37:57,247 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 04:37:57,248 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 04:37:57,248 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 04:37:57,249 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 04:37:57,249 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 04:37:57,249 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 04:37:57,250 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 04:37:57,250 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 04:37:57,250 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-10 04:37:57,260 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 04:37:57,261 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 04:37:57,261 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 04:37:57,261 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 04:37:57,262 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 04:37:57,262 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 04:37:57,262 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 04:37:57,262 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 04:37:57,262 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 04:37:57,262 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 04:37:57,262 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 04:37:57,263 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 04:37:57,263 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 04:37:57,263 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 04:37:57,263 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 04:37:57,263 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 04:37:57,264 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 04:37:57,264 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 04:37:57,264 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 04:37:57,264 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 04:37:57,264 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 04:37:57,264 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 04:37:57,265 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 04:37:57,265 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 04:37:57,265 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 04:37:57,265 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 04:37:57,265 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 04:37:57,265 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 04:37:57,265 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 04:37:57,265 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 04:37:57,266 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 04:37:57,266 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 04:37:57,266 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 04:37:57,266 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-10 04:37:57,266 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_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df3954142d6b55c98b13b60b9fbaf053d4d402ff [2018-11-10 04:37:57,293 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 04:37:57,303 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 04:37:57,305 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 04:37:57,306 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 04:37:57,306 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 04:37:57,307 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-11-10 04:37:57,342 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/data/791aded52/fabb5a45460c430ca813e813a8e2afe8/FLAGd45f85faf [2018-11-10 04:37:57,743 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 04:37:57,743 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-11-10 04:37:57,748 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/data/791aded52/fabb5a45460c430ca813e813a8e2afe8/FLAGd45f85faf [2018-11-10 04:37:57,757 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/data/791aded52/fabb5a45460c430ca813e813a8e2afe8 [2018-11-10 04:37:57,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 04:37:57,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 04:37:57,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 04:37:57,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 04:37:57,762 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 04:37:57,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:37:57" (1/1) ... [2018-11-10 04:37:57,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f1788b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:37:57, skipping insertion in model container [2018-11-10 04:37:57,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:37:57" (1/1) ... [2018-11-10 04:37:57,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 04:37:57,783 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 04:37:57,889 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:37:57,892 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 04:37:57,909 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:37:57,923 INFO L193 MainTranslator]: Completed translation [2018-11-10 04:37:57,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:37:57 WrapperNode [2018-11-10 04:37:57,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 04:37:57,923 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 04:37:57,923 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 04:37:57,923 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 04:37:57,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:37:57" (1/1) ... [2018-11-10 04:37:57,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:37:57" (1/1) ... [2018-11-10 04:37:57,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 04:37:57,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 04:37:57,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 04:37:57,946 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 04:37:57,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:37:57" (1/1) ... [2018-11-10 04:37:57,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:37:57" (1/1) ... [2018-11-10 04:37:57,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:37:57" (1/1) ... [2018-11-10 04:37:57,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:37:57" (1/1) ... [2018-11-10 04:37:57,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:37:57" (1/1) ... [2018-11-10 04:37:57,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:37:57" (1/1) ... [2018-11-10 04:37:57,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:37:57" (1/1) ... [2018-11-10 04:37:57,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 04:37:57,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 04:37:57,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 04:37:57,966 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 04:37:57,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:37:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:37:58,044 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 04:37:58,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 04:37:58,044 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2018-11-10 04:37:58,044 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2018-11-10 04:37:58,044 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-11-10 04:37:58,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-11-10 04:37:58,045 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-11-10 04:37:58,045 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-11-10 04:37:58,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 04:37:58,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 04:37:58,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 04:37:58,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 04:37:58,293 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 04:37:58,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:37:58 BoogieIcfgContainer [2018-11-10 04:37:58,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 04:37:58,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 04:37:58,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 04:37:58,296 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 04:37:58,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 04:37:57" (1/3) ... [2018-11-10 04:37:58,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2afea132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:37:58, skipping insertion in model container [2018-11-10 04:37:58,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:37:57" (2/3) ... [2018-11-10 04:37:58,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2afea132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:37:58, skipping insertion in model container [2018-11-10 04:37:58,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:37:58" (3/3) ... [2018-11-10 04:37:58,299 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251_true-unreach-call.c [2018-11-10 04:37:58,307 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 04:37:58,314 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-11-10 04:37:58,327 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-11-10 04:37:58,354 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 04:37:58,354 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 04:37:58,354 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 04:37:58,354 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 04:37:58,355 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 04:37:58,355 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 04:37:58,355 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 04:37:58,355 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 04:37:58,370 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2018-11-10 04:37:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-10 04:37:58,376 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:37:58,377 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] [2018-11-10 04:37:58,378 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:37:58,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:37:58,383 INFO L82 PathProgramCache]: Analyzing trace with hash -732075711, now seen corresponding path program 1 times [2018-11-10 04:37:58,385 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:37:58,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:37:58,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:37:58,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:37:58,425 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:37:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:37:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 04:37:58,501 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:37:58,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 04:37:58,501 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:37:58,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 04:37:58,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 04:37:58,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 04:37:58,518 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2018-11-10 04:37:58,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:37:58,540 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions. [2018-11-10 04:37:58,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 04:37:58,541 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 36 [2018-11-10 04:37:58,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:37:58,549 INFO L225 Difference]: With dead ends: 109 [2018-11-10 04:37:58,549 INFO L226 Difference]: Without dead ends: 61 [2018-11-10 04:37:58,552 INFO L605 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 [2018-11-10 04:37:58,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-10 04:37:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-11-10 04:37:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-10 04:37:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-11-10 04:37:58,585 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-11-10 04:37:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:37:58,587 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-11-10 04:37:58,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 04:37:58,587 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-11-10 04:37:58,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-10 04:37:58,588 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:37:58,589 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] [2018-11-10 04:37:58,589 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:37:58,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:37:58,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1620066532, now seen corresponding path program 1 times [2018-11-10 04:37:58,589 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:37:58,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:37:58,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:37:58,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:37:58,591 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:37:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:37:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 04:37:58,664 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:37:58,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:37:58,664 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:37:58,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:37:58,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:37:58,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:37:58,666 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-11-10 04:37:58,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:37:58,734 INFO L93 Difference]: Finished difference Result 112 states and 147 transitions. [2018-11-10 04:37:58,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 04:37:58,734 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-11-10 04:37:58,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:37:58,735 INFO L225 Difference]: With dead ends: 112 [2018-11-10 04:37:58,735 INFO L226 Difference]: Without dead ends: 70 [2018-11-10 04:37:58,736 INFO L605 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 [2018-11-10 04:37:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-11-10 04:37:58,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2018-11-10 04:37:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-10 04:37:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2018-11-10 04:37:58,742 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 37 [2018-11-10 04:37:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:37:58,743 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2018-11-10 04:37:58,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:37:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2018-11-10 04:37:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-10 04:37:58,744 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:37:58,744 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] [2018-11-10 04:37:58,744 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:37:58,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:37:58,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1433468384, now seen corresponding path program 1 times [2018-11-10 04:37:58,744 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:37:58,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:37:58,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:37:58,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:37:58,746 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:37:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:37:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 04:37:58,809 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:37:58,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:37:58,810 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:37:58,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:37:58,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:37:58,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:37:58,811 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2018-11-10 04:37:58,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:37:58,825 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2018-11-10 04:37:58,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:37:58,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-11-10 04:37:58,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:37:58,827 INFO L225 Difference]: With dead ends: 89 [2018-11-10 04:37:58,827 INFO L226 Difference]: Without dead ends: 67 [2018-11-10 04:37:58,828 INFO L605 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 [2018-11-10 04:37:58,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-10 04:37:58,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-11-10 04:37:58,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-10 04:37:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-11-10 04:37:58,833 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 42 [2018-11-10 04:37:58,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:37:58,833 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-11-10 04:37:58,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:37:58,833 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-11-10 04:37:58,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-10 04:37:58,834 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:37:58,834 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] [2018-11-10 04:37:58,835 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:37:58,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:37:58,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1362097717, now seen corresponding path program 1 times [2018-11-10 04:37:58,835 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:37:58,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:37:58,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:37:58,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:37:58,836 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:37:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:37:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 04:37:58,883 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:37:58,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 04:37:58,883 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:37:58,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 04:37:58,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 04:37:58,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 04:37:58,884 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 3 states. [2018-11-10 04:37:58,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:37:58,909 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2018-11-10 04:37:58,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 04:37:58,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2018-11-10 04:37:58,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:37:58,910 INFO L225 Difference]: With dead ends: 70 [2018-11-10 04:37:58,910 INFO L226 Difference]: Without dead ends: 68 [2018-11-10 04:37:58,911 INFO L605 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 [2018-11-10 04:37:58,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-10 04:37:58,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-11-10 04:37:58,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-10 04:37:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2018-11-10 04:37:58,916 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 45 [2018-11-10 04:37:58,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:37:58,916 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2018-11-10 04:37:58,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 04:37:58,916 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2018-11-10 04:37:58,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 04:37:58,917 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:37:58,917 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] [2018-11-10 04:37:58,918 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:37:58,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:37:58,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1930782112, now seen corresponding path program 1 times [2018-11-10 04:37:58,918 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:37:58,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:37:58,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:37:58,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:37:58,919 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:37:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 04:37:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 04:37:58,973 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 04:37:58,983 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:37:58,984 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:37:58,984 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:37:58,984 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:37:58,985 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:37:58,985 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:37:58,985 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:37:58,985 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:37:58,985 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:37:58,985 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:37:58,986 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:37:58,986 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:37:58,986 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:37:58,986 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:37:58,986 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:37:58,986 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:37:58,987 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:37:58,987 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:37:58,987 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:37:58,987 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:37:58,987 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:37:58,988 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:37:58,988 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:37:58,988 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:37:58,988 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:37:58,988 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled [2018-11-10 04:37:58,989 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:37:58,989 WARN L387 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled [2018-11-10 04:37:59,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 04:37:59 BoogieIcfgContainer [2018-11-10 04:37:59,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 04:37:59,006 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 04:37:59,006 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 04:37:59,006 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 04:37:59,006 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:37:58" (3/4) ... [2018-11-10 04:37:59,010 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-10 04:37:59,010 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 04:37:59,010 INFO L168 Benchmark]: Toolchain (without parser) took 1251.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -92.9 MB). Peak memory consumption was 60.7 MB. Max. memory is 11.5 GB. [2018-11-10 04:37:59,012 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:37:59,012 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.24 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 947.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-11-10 04:37:59,012 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.83 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 04:37:59,013 INFO L168 Benchmark]: Boogie Preprocessor took 19.44 ms. Allocated memory is still 1.0 GB. Free memory was 944.7 MB in the beginning and 942.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 04:37:59,013 INFO L168 Benchmark]: RCFGBuilder took 327.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -184.9 MB). Peak memory consumption was 15.3 MB. Max. memory is 11.5 GB. [2018-11-10 04:37:59,014 INFO L168 Benchmark]: TraceAbstraction took 711.61 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: 74.8 MB). Peak memory consumption was 74.8 MB. Max. memory is 11.5 GB. [2018-11-10 04:37:59,014 INFO L168 Benchmark]: Witness Printer took 4.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:37:59,017 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 163.24 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 947.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.83 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.44 ms. Allocated memory is still 1.0 GB. Free memory was 944.7 MB in the beginning and 942.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 327.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -184.9 MB). Peak memory consumption was 15.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 711.61 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: 74.8 MB). Peak memory consumption was 74.8 MB. Max. memory is 11.5 GB. * Witness Printer took 4.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList ULTIMATE.dealloc_~addr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.alloc_#res : $Pointer$ not handled * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 74]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 73. Possible FailurePath: [L64] float x = __VERIFIER_nondet_float(); [L65] float y = __VERIFIER_nondet_float(); [L67] CALL, EXPR isnan_float(x) VAL [\old(x)=4286578693] [L55] RET return x != x; VAL [\old(x)=4286578693, \result=1, x=4286578693] [L67] EXPR isnan_float(x) VAL [isnan_float(x)=1, x=4286578693, y=4286578692] [L67] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, x=4286578693, y=4286578692] [L67] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578692] [L55] RET return x != x; VAL [\old(x)=4286578692, \result=0, x=4286578692] [L67] EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578693, y=4286578692] [L67] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578693, y=4286578692] [L67-L68] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) VAL [(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))=1, isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578693, y=4286578692] [L67-L68] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L70] CALL, EXPR fmax_float(x, y) VAL [\old(x)=4286578693, \old(y)=4286578692] [L44] CALL, EXPR __fpclassify_float(x) [L21] __uint32_t w; [L24] CALL ieee_float_shape_type gf_u; [L24] RET ieee_float_shape_type gf_u; [L25] CALL gf_u.value = (x) [L25] RET gf_u.value = (x) [L26] CALL, EXPR gf_u.word [L26] RET, EXPR gf_u.word [L26] (w) = gf_u.word [L26] RET (w) = gf_u.word [L27] COND FALSE !(0) [L29] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L31-L32] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L34-L35] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L37] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L40] RET return 0; [L44] EXPR __fpclassify_float(x) VAL [\old(x)=4286578693, \old(y)=4286578692, __fpclassify_float(x)=0, x=4286578693, y=4286578692] [L44] COND TRUE __fpclassify_float(x) == 0 [L45] RET return y; VAL [\old(x)=4286578693, \old(y)=4286578692, \result=4286578692, x=4286578693, y=4286578692] [L70] EXPR fmax_float(x, y) VAL [fmax_float(x, y)=4286578692, x=4286578693, y=4286578692] [L70] float res = fmax_float(x, y); [L73] CALL, EXPR isnan_float(x) VAL [\old(x)=4286578693] [L55] RET return x != x; VAL [\old(x)=4286578693, \result=1, x=4286578693] [L73] EXPR isnan_float(x) VAL [isnan_float(x)=1, res=4286578692, x=4286578693, y=4286578692] [L73] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, res=4286578692, x=4286578693, y=4286578692] [L73] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578692] [L55] RET return x != x; VAL [\old(x)=4286578692, \result=0, x=4286578692] [L73] EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=4286578692, x=4286578693, y=4286578692] [L73] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=4286578692, x=4286578693, y=4286578692] [L73] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L74] __VERIFIER_error() VAL [res=4286578692, x=4286578693, y=4286578692] - 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 0.1.23-1dbac8b [2018-11-10 04:38:00,444 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 04:38:00,446 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 04:38:00,454 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 04:38:00,455 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 04:38:00,455 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 04:38:00,456 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 04:38:00,457 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 04:38:00,458 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 04:38:00,459 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 04:38:00,460 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 04:38:00,460 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 04:38:00,460 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 04:38:00,461 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 04:38:00,462 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 04:38:00,462 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 04:38:00,463 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 04:38:00,464 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 04:38:00,465 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 04:38:00,466 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 04:38:00,467 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 04:38:00,468 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 04:38:00,470 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 04:38:00,470 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 04:38:00,470 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 04:38:00,471 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 04:38:00,471 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 04:38:00,472 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 04:38:00,472 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 04:38:00,473 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 04:38:00,473 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 04:38:00,474 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 04:38:00,475 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 04:38:00,475 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 04:38:00,475 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 04:38:00,476 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 04:38:00,476 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-11-10 04:38:00,487 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 04:38:00,487 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 04:38:00,488 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 04:38:00,488 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 04:38:00,488 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 04:38:00,488 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 04:38:00,489 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 04:38:00,489 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 04:38:00,489 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 04:38:00,489 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 04:38:00,489 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 04:38:00,490 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 04:38:00,490 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 04:38:00,490 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 04:38:00,490 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 04:38:00,490 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-10 04:38:00,490 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-10 04:38:00,490 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 04:38:00,490 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 04:38:00,491 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 04:38:00,491 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 04:38:00,491 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 04:38:00,491 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 04:38:00,491 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 04:38:00,491 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 04:38:00,491 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 04:38:00,492 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 04:38:00,492 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 04:38:00,492 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-11-10 04:38:00,492 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 04:38:00,492 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-10 04:38:00,492 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-10 04:38:00,492 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_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df3954142d6b55c98b13b60b9fbaf053d4d402ff [2018-11-10 04:38:00,524 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 04:38:00,534 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 04:38:00,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 04:38:00,538 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 04:38:00,538 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 04:38:00,539 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-11-10 04:38:00,586 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/data/06ce16346/6205ffba9bb64190aab2b8ab62260902/FLAG256bad0a7 [2018-11-10 04:38:00,981 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 04:38:00,982 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/sv-benchmarks/c/float-newlib/float_req_bl_1251_true-unreach-call.c [2018-11-10 04:38:00,986 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/data/06ce16346/6205ffba9bb64190aab2b8ab62260902/FLAG256bad0a7 [2018-11-10 04:38:00,994 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/data/06ce16346/6205ffba9bb64190aab2b8ab62260902 [2018-11-10 04:38:00,997 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 04:38:00,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 04:38:00,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 04:38:00,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 04:38:01,000 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 04:38:01,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:38:00" (1/1) ... [2018-11-10 04:38:01,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d68c770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:38:01, skipping insertion in model container [2018-11-10 04:38:01,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:38:00" (1/1) ... [2018-11-10 04:38:01,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 04:38:01,027 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 04:38:01,160 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:38:01,164 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 04:38:01,181 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:38:01,197 INFO L193 MainTranslator]: Completed translation [2018-11-10 04:38:01,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:38:01 WrapperNode [2018-11-10 04:38:01,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 04:38:01,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 04:38:01,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 04:38:01,198 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 04:38:01,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:38:01" (1/1) ... [2018-11-10 04:38:01,212 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:38:01" (1/1) ... [2018-11-10 04:38:01,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 04:38:01,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 04:38:01,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 04:38:01,228 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 04:38:01,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:38:01" (1/1) ... [2018-11-10 04:38:01,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:38:01" (1/1) ... [2018-11-10 04:38:01,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:38:01" (1/1) ... [2018-11-10 04:38:01,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:38:01" (1/1) ... [2018-11-10 04:38:01,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:38:01" (1/1) ... [2018-11-10 04:38:01,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:38:01" (1/1) ... [2018-11-10 04:38:01,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:38:01" (1/1) ... [2018-11-10 04:38:01,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 04:38:01,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 04:38:01,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 04:38:01,248 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 04:38:01,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:38:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 04:38:01,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 04:38:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2018-11-10 04:38:01,324 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2018-11-10 04:38:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-11-10 04:38:01,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-11-10 04:38:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-11-10 04:38:01,324 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-11-10 04:38:01,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 04:38:01,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 04:38:01,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 04:38:01,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 04:38:01,554 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 04:38:01,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:38:01 BoogieIcfgContainer [2018-11-10 04:38:01,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 04:38:01,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 04:38:01,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 04:38:01,557 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 04:38:01,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 04:38:00" (1/3) ... [2018-11-10 04:38:01,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ba47ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:38:01, skipping insertion in model container [2018-11-10 04:38:01,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:38:01" (2/3) ... [2018-11-10 04:38:01,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ba47ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:38:01, skipping insertion in model container [2018-11-10 04:38:01,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:38:01" (3/3) ... [2018-11-10 04:38:01,559 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251_true-unreach-call.c [2018-11-10 04:38:01,564 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 04:38:01,569 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-11-10 04:38:01,578 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-11-10 04:38:01,595 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 04:38:01,596 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 04:38:01,596 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 04:38:01,596 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 04:38:01,596 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 04:38:01,596 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 04:38:01,596 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 04:38:01,596 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 04:38:01,596 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 04:38:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-11-10 04:38:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-10 04:38:01,614 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:01,614 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] [2018-11-10 04:38:01,616 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:01,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:01,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1256839536, now seen corresponding path program 1 times [2018-11-10 04:38:01,623 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:01,623 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:01,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:01,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:38:01,708 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:01,720 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:01,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 04:38:01,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 04:38:01,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 04:38:01,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 04:38:01,731 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-11-10 04:38:01,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:01,751 INFO L93 Difference]: Finished difference Result 105 states and 146 transitions. [2018-11-10 04:38:01,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 04:38:01,752 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 35 [2018-11-10 04:38:01,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:01,760 INFO L225 Difference]: With dead ends: 105 [2018-11-10 04:38:01,760 INFO L226 Difference]: Without dead ends: 59 [2018-11-10 04:38:01,762 INFO L605 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 [2018-11-10 04:38:01,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-10 04:38:01,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-11-10 04:38:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-10 04:38:01,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2018-11-10 04:38:01,790 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 35 [2018-11-10 04:38:01,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:01,791 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2018-11-10 04:38:01,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 04:38:01,792 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2018-11-10 04:38:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-10 04:38:01,793 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:01,794 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] [2018-11-10 04:38:01,794 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:01,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:01,795 INFO L82 PathProgramCache]: Analyzing trace with hash -436144077, now seen corresponding path program 1 times [2018-11-10 04:38:01,795 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:01,795 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:01,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:01,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:38:01,886 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:01,896 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:01,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:38:01,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:38:01,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:38:01,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:38:01,898 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2018-11-10 04:38:01,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:01,943 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2018-11-10 04:38:01,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 04:38:01,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-11-10 04:38:01,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:01,945 INFO L225 Difference]: With dead ends: 108 [2018-11-10 04:38:01,945 INFO L226 Difference]: Without dead ends: 68 [2018-11-10 04:38:01,946 INFO L605 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 [2018-11-10 04:38:01,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-10 04:38:01,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2018-11-10 04:38:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-10 04:38:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-11-10 04:38:01,955 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-11-10 04:38:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:01,955 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-11-10 04:38:01,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:38:01,955 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-11-10 04:38:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-10 04:38:01,956 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:01,957 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] [2018-11-10 04:38:01,957 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:01,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:01,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1360757035, now seen corresponding path program 1 times [2018-11-10 04:38:01,958 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:01,958 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:01,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:02,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 04:38:02,040 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:02,047 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:02,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:38:02,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:38:02,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:38:02,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:38:02,048 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-11-10 04:38:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:02,079 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2018-11-10 04:38:02,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:38:02,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-11-10 04:38:02,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:02,081 INFO L225 Difference]: With dead ends: 86 [2018-11-10 04:38:02,081 INFO L226 Difference]: Without dead ends: 64 [2018-11-10 04:38:02,082 INFO L605 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 [2018-11-10 04:38:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-10 04:38:02,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-11-10 04:38:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-10 04:38:02,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-10 04:38:02,087 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 41 [2018-11-10 04:38:02,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:02,088 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-10 04:38:02,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:38:02,088 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-10 04:38:02,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-10 04:38:02,088 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:02,088 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] [2018-11-10 04:38:02,089 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:02,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:02,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2132693573, now seen corresponding path program 1 times [2018-11-10 04:38:02,089 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:02,089 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:02,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:02,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 04:38:02,154 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:02,161 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:02,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:38:02,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:38:02,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:38:02,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:38:02,162 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-11-10 04:38:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:02,184 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-10 04:38:02,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:38:02,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-11-10 04:38:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:02,186 INFO L225 Difference]: With dead ends: 89 [2018-11-10 04:38:02,186 INFO L226 Difference]: Without dead ends: 67 [2018-11-10 04:38:02,187 INFO L605 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 [2018-11-10 04:38:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-10 04:38:02,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-10 04:38:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-10 04:38:02,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-10 04:38:02,195 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 42 [2018-11-10 04:38:02,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:02,195 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-10 04:38:02,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:38:02,196 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-10 04:38:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-10 04:38:02,197 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:02,197 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] [2018-11-10 04:38:02,197 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:02,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:02,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1320240081, now seen corresponding path program 1 times [2018-11-10 04:38:02,199 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:02,199 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:02,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:02,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 04:38:02,265 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:02,274 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:02,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:38:02,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:38:02,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:38:02,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:38:02,275 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-11-10 04:38:02,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:02,290 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-10 04:38:02,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:38:02,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-11-10 04:38:02,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:02,291 INFO L225 Difference]: With dead ends: 89 [2018-11-10 04:38:02,291 INFO L226 Difference]: Without dead ends: 67 [2018-11-10 04:38:02,292 INFO L605 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 [2018-11-10 04:38:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-10 04:38:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-10 04:38:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-10 04:38:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-10 04:38:02,299 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 43 [2018-11-10 04:38:02,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:02,299 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-10 04:38:02,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:38:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-10 04:38:02,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-10 04:38:02,300 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:02,300 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] [2018-11-10 04:38:02,301 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:02,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:02,301 INFO L82 PathProgramCache]: Analyzing trace with hash -168745665, now seen corresponding path program 1 times [2018-11-10 04:38:02,301 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:02,301 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:02,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:02,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 04:38:02,353 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:02,360 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:02,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:38:02,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:38:02,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:38:02,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:38:02,361 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-11-10 04:38:02,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:02,378 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-10 04:38:02,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:38:02,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-11-10 04:38:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:02,379 INFO L225 Difference]: With dead ends: 89 [2018-11-10 04:38:02,379 INFO L226 Difference]: Without dead ends: 67 [2018-11-10 04:38:02,380 INFO L605 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 [2018-11-10 04:38:02,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-10 04:38:02,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-10 04:38:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-10 04:38:02,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-11-10 04:38:02,386 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 44 [2018-11-10 04:38:02,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:02,387 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-11-10 04:38:02,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:38:02,387 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-10 04:38:02,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-10 04:38:02,388 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:02,388 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] [2018-11-10 04:38:02,388 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:02,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:02,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1338806144, now seen corresponding path program 1 times [2018-11-10 04:38:02,389 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:02,389 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:02,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:02,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 04:38:02,577 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 04:38:02,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:38:02,818 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:02,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:02,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 04:38:02,867 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:02,883 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:38:02,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 14 [2018-11-10 04:38:02,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 04:38:02,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 04:38:02,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-11-10 04:38:02,884 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 14 states. [2018-11-10 04:38:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:03,259 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2018-11-10 04:38:03,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 04:38:03,259 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2018-11-10 04:38:03,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:03,260 INFO L225 Difference]: With dead ends: 105 [2018-11-10 04:38:03,260 INFO L226 Difference]: Without dead ends: 91 [2018-11-10 04:38:03,260 INFO L605 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 [2018-11-10 04:38:03,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-11-10 04:38:03,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2018-11-10 04:38:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-11-10 04:38:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2018-11-10 04:38:03,265 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 44 [2018-11-10 04:38:03,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:03,265 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2018-11-10 04:38:03,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 04:38:03,265 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2018-11-10 04:38:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 04:38:03,267 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:03,268 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] [2018-11-10 04:38:03,268 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:03,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:03,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1637778421, now seen corresponding path program 1 times [2018-11-10 04:38:03,268 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:03,268 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:03,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:03,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-10 04:38:03,444 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-10 04:38:03,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:38:03,784 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:03,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:03,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-10 04:38:04,033 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-10 04:38:04,365 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2018-11-10 04:38:04,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11, 11] total 29 [2018-11-10 04:38:04,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-10 04:38:04,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-10 04:38:04,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2018-11-10 04:38:04,367 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand 29 states. [2018-11-10 04:38:06,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:06,219 INFO L93 Difference]: Finished difference Result 136 states and 179 transitions. [2018-11-10 04:38:06,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-10 04:38:06,219 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 49 [2018-11-10 04:38:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:06,221 INFO L225 Difference]: With dead ends: 136 [2018-11-10 04:38:06,221 INFO L226 Difference]: Without dead ends: 134 [2018-11-10 04:38:06,222 INFO L605 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 [2018-11-10 04:38:06,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-10 04:38:06,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2018-11-10 04:38:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-10 04:38:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2018-11-10 04:38:06,233 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 49 [2018-11-10 04:38:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:06,233 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2018-11-10 04:38:06,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-10 04:38:06,233 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2018-11-10 04:38:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-10 04:38:06,234 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:06,235 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] [2018-11-10 04:38:06,235 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:06,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:06,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2035503454, now seen corresponding path program 1 times [2018-11-10 04:38:06,236 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:06,236 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:06,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:06,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-10 04:38:06,346 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:06,353 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:06,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 04:38:06,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 04:38:06,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 04:38:06,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-10 04:38:06,354 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand 8 states. [2018-11-10 04:38:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:06,629 INFO L93 Difference]: Finished difference Result 158 states and 208 transitions. [2018-11-10 04:38:06,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 04:38:06,629 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2018-11-10 04:38:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:06,630 INFO L225 Difference]: With dead ends: 158 [2018-11-10 04:38:06,630 INFO L226 Difference]: Without dead ends: 105 [2018-11-10 04:38:06,631 INFO L605 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 [2018-11-10 04:38:06,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-11-10 04:38:06,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2018-11-10 04:38:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-10 04:38:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2018-11-10 04:38:06,641 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 53 [2018-11-10 04:38:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:06,642 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2018-11-10 04:38:06,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 04:38:06,642 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2018-11-10 04:38:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-10 04:38:06,643 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:06,643 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] [2018-11-10 04:38:06,643 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:06,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:06,644 INFO L82 PathProgramCache]: Analyzing trace with hash -917330638, now seen corresponding path program 1 times [2018-11-10 04:38:06,644 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:06,644 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:06,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:06,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-10 04:38:06,764 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-10 04:38:06,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:38:06,915 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:06,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:06,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-10 04:38:06,957 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:06,974 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:38:06,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 13 [2018-11-10 04:38:06,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 04:38:06,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 04:38:06,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-11-10 04:38:06,975 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand 13 states. [2018-11-10 04:38:07,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:07,293 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2018-11-10 04:38:07,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 04:38:07,294 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2018-11-10 04:38:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:07,295 INFO L225 Difference]: With dead ends: 110 [2018-11-10 04:38:07,295 INFO L226 Difference]: Without dead ends: 106 [2018-11-10 04:38:07,295 INFO L605 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 [2018-11-10 04:38:07,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-11-10 04:38:07,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2018-11-10 04:38:07,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-10 04:38:07,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2018-11-10 04:38:07,304 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 58 [2018-11-10 04:38:07,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:07,304 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2018-11-10 04:38:07,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 04:38:07,304 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2018-11-10 04:38:07,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-10 04:38:07,305 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:07,305 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] [2018-11-10 04:38:07,305 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:07,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:07,306 INFO L82 PathProgramCache]: Analyzing trace with hash 221870355, now seen corresponding path program 1 times [2018-11-10 04:38:07,309 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:07,309 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:07,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:07,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-10 04:38:07,391 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:07,399 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:07,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:38:07,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:38:07,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:38:07,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:38:07,400 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand 4 states. [2018-11-10 04:38:07,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:07,416 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2018-11-10 04:38:07,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:38:07,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2018-11-10 04:38:07,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:07,417 INFO L225 Difference]: With dead ends: 119 [2018-11-10 04:38:07,417 INFO L226 Difference]: Without dead ends: 92 [2018-11-10 04:38:07,418 INFO L605 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 [2018-11-10 04:38:07,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-11-10 04:38:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-11-10 04:38:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-10 04:38:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-11-10 04:38:07,426 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 61 [2018-11-10 04:38:07,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:07,426 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-11-10 04:38:07,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:38:07,426 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-11-10 04:38:07,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-10 04:38:07,427 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:07,427 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] [2018-11-10 04:38:07,427 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:07,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:07,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1743084858, now seen corresponding path program 1 times [2018-11-10 04:38:07,428 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:07,428 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:07,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:07,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 04:38:07,490 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:07,497 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:07,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:38:07,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:38:07,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:38:07,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:38:07,498 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 4 states. [2018-11-10 04:38:07,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:07,513 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2018-11-10 04:38:07,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:38:07,513 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-11-10 04:38:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:07,514 INFO L225 Difference]: With dead ends: 122 [2018-11-10 04:38:07,514 INFO L226 Difference]: Without dead ends: 95 [2018-11-10 04:38:07,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:38:07,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-10 04:38:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2018-11-10 04:38:07,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-10 04:38:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-11-10 04:38:07,523 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 55 [2018-11-10 04:38:07,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:07,524 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-11-10 04:38:07,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:38:07,524 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-11-10 04:38:07,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-10 04:38:07,524 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:07,524 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] [2018-11-10 04:38:07,525 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:07,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:07,525 INFO L82 PathProgramCache]: Analyzing trace with hash -448157192, now seen corresponding path program 1 times [2018-11-10 04:38:07,525 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:07,525 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:07,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:07,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 04:38:07,790 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:07,802 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:07,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-11-10 04:38:07,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 04:38:07,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 04:38:07,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-10 04:38:07,803 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 9 states. [2018-11-10 04:38:08,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:08,482 INFO L93 Difference]: Finished difference Result 147 states and 189 transitions. [2018-11-10 04:38:08,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 04:38:08,483 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2018-11-10 04:38:08,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:08,484 INFO L225 Difference]: With dead ends: 147 [2018-11-10 04:38:08,484 INFO L226 Difference]: Without dead ends: 122 [2018-11-10 04:38:08,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-11-10 04:38:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-11-10 04:38:08,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2018-11-10 04:38:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-11-10 04:38:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2018-11-10 04:38:08,492 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 63 [2018-11-10 04:38:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:08,493 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2018-11-10 04:38:08,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 04:38:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2018-11-10 04:38:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-10 04:38:08,493 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:08,493 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] [2018-11-10 04:38:08,494 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:08,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:08,496 INFO L82 PathProgramCache]: Analyzing trace with hash 525027593, now seen corresponding path program 1 times [2018-11-10 04:38:08,496 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:08,496 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2018-11-10 04:38:08,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:08,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 04:38:08,668 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:08,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:38:08,811 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:38:08,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:08,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 04:38:08,842 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:09,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:38:09,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-10 04:38:09,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 04:38:09,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 04:38:09,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-10 04:38:09,005 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand 8 states. [2018-11-10 04:38:09,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:09,750 INFO L93 Difference]: Finished difference Result 134 states and 170 transitions. [2018-11-10 04:38:09,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 04:38:09,750 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2018-11-10 04:38:09,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:09,751 INFO L225 Difference]: With dead ends: 134 [2018-11-10 04:38:09,751 INFO L226 Difference]: Without dead ends: 111 [2018-11-10 04:38:09,751 INFO L605 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 [2018-11-10 04:38:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-11-10 04:38:09,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2018-11-10 04:38:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-10 04:38:09,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 120 transitions. [2018-11-10 04:38:09,761 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 120 transitions. Word has length 56 [2018-11-10 04:38:09,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:09,762 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 120 transitions. [2018-11-10 04:38:09,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 04:38:09,762 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 120 transitions. [2018-11-10 04:38:09,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-10 04:38:09,762 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:09,763 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] [2018-11-10 04:38:09,763 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:09,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:09,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1469117113, now seen corresponding path program 1 times [2018-11-10 04:38:09,763 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:09,763 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:09,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:09,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-10 04:38:09,981 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:09,988 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:09,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-11-10 04:38:09,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 04:38:09,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 04:38:09,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-11-10 04:38:09,989 INFO L87 Difference]: Start difference. First operand 92 states and 120 transitions. Second operand 11 states. [2018-11-10 04:38:10,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:10,546 INFO L93 Difference]: Finished difference Result 121 states and 156 transitions. [2018-11-10 04:38:10,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 04:38:10,547 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-11-10 04:38:10,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:10,547 INFO L225 Difference]: With dead ends: 121 [2018-11-10 04:38:10,547 INFO L226 Difference]: Without dead ends: 119 [2018-11-10 04:38:10,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-11-10 04:38:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-10 04:38:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2018-11-10 04:38:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-10 04:38:10,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2018-11-10 04:38:10,557 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 56 [2018-11-10 04:38:10,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:10,557 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2018-11-10 04:38:10,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 04:38:10,557 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2018-11-10 04:38:10,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-10 04:38:10,558 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:10,558 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] [2018-11-10 04:38:10,558 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:10,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:10,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1422897632, now seen corresponding path program 1 times [2018-11-10 04:38:10,559 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:10,559 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2018-11-10 04:38:10,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:10,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 04:38:10,614 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:10,621 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:10,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:38:10,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:38:10,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:38:10,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:38:10,622 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 4 states. [2018-11-10 04:38:10,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:10,635 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2018-11-10 04:38:10,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:38:10,635 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-11-10 04:38:10,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:10,636 INFO L225 Difference]: With dead ends: 127 [2018-11-10 04:38:10,636 INFO L226 Difference]: Without dead ends: 100 [2018-11-10 04:38:10,636 INFO L605 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 [2018-11-10 04:38:10,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-11-10 04:38:10,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2018-11-10 04:38:10,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-10 04:38:10,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2018-11-10 04:38:10,642 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 56 [2018-11-10 04:38:10,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:10,642 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2018-11-10 04:38:10,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:38:10,643 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2018-11-10 04:38:10,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-10 04:38:10,643 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:10,643 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] [2018-11-10 04:38:10,644 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:10,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:10,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1531309075, now seen corresponding path program 1 times [2018-11-10 04:38:10,644 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:10,644 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:10,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:10,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 04:38:11,089 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:11,344 WARN L179 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2018-11-10 04:38:11,762 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2018-11-10 04:38:12,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:38:12,188 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:38:12,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:12,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-10 04:38:12,378 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:12,510 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2018-11-10 04:38:12,970 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2018-11-10 04:38:13,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:38:13,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 17 [2018-11-10 04:38:13,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 04:38:13,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 04:38:13,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-11-10 04:38:13,203 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 17 states. [2018-11-10 04:38:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:14,641 INFO L93 Difference]: Finished difference Result 154 states and 201 transitions. [2018-11-10 04:38:14,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 04:38:14,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-11-10 04:38:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:14,642 INFO L225 Difference]: With dead ends: 154 [2018-11-10 04:38:14,642 INFO L226 Difference]: Without dead ends: 127 [2018-11-10 04:38:14,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2018-11-10 04:38:14,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-10 04:38:14,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2018-11-10 04:38:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-10 04:38:14,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2018-11-10 04:38:14,651 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 63 [2018-11-10 04:38:14,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:14,652 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2018-11-10 04:38:14,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 04:38:14,652 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2018-11-10 04:38:14,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-10 04:38:14,653 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:14,653 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, 1, 1] [2018-11-10 04:38:14,653 INFO L424 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:14,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:14,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1082608614, now seen corresponding path program 1 times [2018-11-10 04:38:14,654 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:14,654 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2018-11-10 04:38:14,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:14,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-10 04:38:14,780 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-10 04:38:15,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:38:15,067 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:38:15,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:15,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 04:38:15,146 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-10 04:38:15,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 04:38:15,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 12] total 17 [2018-11-10 04:38:15,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 04:38:15,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 04:38:15,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-11-10 04:38:15,299 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 17 states. [2018-11-10 04:38:15,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:15,708 INFO L93 Difference]: Finished difference Result 149 states and 192 transitions. [2018-11-10 04:38:15,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 04:38:15,708 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2018-11-10 04:38:15,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:15,709 INFO L225 Difference]: With dead ends: 149 [2018-11-10 04:38:15,709 INFO L226 Difference]: Without dead ends: 119 [2018-11-10 04:38:15,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2018-11-10 04:38:15,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-10 04:38:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2018-11-10 04:38:15,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-11-10 04:38:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2018-11-10 04:38:15,717 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 64 [2018-11-10 04:38:15,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:15,717 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2018-11-10 04:38:15,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 04:38:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2018-11-10 04:38:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-10 04:38:15,718 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:15,718 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] [2018-11-10 04:38:15,719 INFO L424 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:15,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:15,719 INFO L82 PathProgramCache]: Analyzing trace with hash -978651351, now seen corresponding path program 1 times [2018-11-10 04:38:15,719 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:15,719 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/mathsat Starting monitored process 26 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with mathsat -unsat_core_generation=3 [2018-11-10 04:38:15,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:15,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-10 04:38:15,931 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:16,113 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-10 04:38:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-10 04:38:16,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:38:16,403 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:38:16,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:16,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-10 04:38:17,047 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:17,072 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:38:17,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 12] total 29 [2018-11-10 04:38:17,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-10 04:38:17,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-10 04:38:17,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2018-11-10 04:38:17,073 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand 29 states. [2018-11-10 04:38:18,724 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2018-11-10 04:38:19,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:19,345 INFO L93 Difference]: Finished difference Result 185 states and 240 transitions. [2018-11-10 04:38:19,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-10 04:38:19,345 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-11-10 04:38:19,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:19,346 INFO L225 Difference]: With dead ends: 185 [2018-11-10 04:38:19,346 INFO L226 Difference]: Without dead ends: 183 [2018-11-10 04:38:19,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=1302, Unknown=0, NotChecked=0, Total=1482 [2018-11-10 04:38:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-11-10 04:38:19,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 111. [2018-11-10 04:38:19,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-11-10 04:38:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 148 transitions. [2018-11-10 04:38:19,356 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 148 transitions. Word has length 57 [2018-11-10 04:38:19,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:19,356 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 148 transitions. [2018-11-10 04:38:19,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-10 04:38:19,356 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 148 transitions. [2018-11-10 04:38:19,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-10 04:38:19,357 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:19,357 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] [2018-11-10 04:38:19,357 INFO L424 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:19,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:19,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1722325118, now seen corresponding path program 1 times [2018-11-10 04:38:19,357 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:19,357 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:19,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:19,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 04:38:19,410 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:19,417 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:19,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:38:19,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:38:19,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:38:19,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:38:19,418 INFO L87 Difference]: Start difference. First operand 111 states and 148 transitions. Second operand 4 states. [2018-11-10 04:38:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:19,431 INFO L93 Difference]: Finished difference Result 142 states and 187 transitions. [2018-11-10 04:38:19,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:38:19,432 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-11-10 04:38:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:19,432 INFO L225 Difference]: With dead ends: 142 [2018-11-10 04:38:19,432 INFO L226 Difference]: Without dead ends: 113 [2018-11-10 04:38:19,432 INFO L605 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 [2018-11-10 04:38:19,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-11-10 04:38:19,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-11-10 04:38:19,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-10 04:38:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 144 transitions. [2018-11-10 04:38:19,441 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 144 transitions. Word has length 57 [2018-11-10 04:38:19,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:19,441 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 144 transitions. [2018-11-10 04:38:19,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:38:19,441 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 144 transitions. [2018-11-10 04:38:19,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-10 04:38:19,442 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:19,442 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] [2018-11-10 04:38:19,442 INFO L424 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:19,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:19,443 INFO L82 PathProgramCache]: Analyzing trace with hash 296411082, now seen corresponding path program 1 times [2018-11-10 04:38:19,443 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:19,443 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:19,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:19,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 04:38:19,556 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-10 04:38:19,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:38:19,775 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:19,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:19,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 04:38:19,813 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-10 04:38:19,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 04:38:19,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9] total 13 [2018-11-10 04:38:19,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 04:38:19,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 04:38:19,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-11-10 04:38:19,973 INFO L87 Difference]: Start difference. First operand 109 states and 144 transitions. Second operand 13 states. [2018-11-10 04:38:20,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:20,328 INFO L93 Difference]: Finished difference Result 191 states and 238 transitions. [2018-11-10 04:38:20,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 04:38:20,328 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2018-11-10 04:38:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:20,329 INFO L225 Difference]: With dead ends: 191 [2018-11-10 04:38:20,329 INFO L226 Difference]: Without dead ends: 111 [2018-11-10 04:38:20,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-11-10 04:38:20,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-11-10 04:38:20,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2018-11-10 04:38:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-10 04:38:20,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2018-11-10 04:38:20,336 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 69 [2018-11-10 04:38:20,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:20,336 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2018-11-10 04:38:20,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 04:38:20,337 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2018-11-10 04:38:20,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-10 04:38:20,337 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:20,337 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] [2018-11-10 04:38:20,338 INFO L424 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:20,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:20,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2131149343, now seen corresponding path program 1 times [2018-11-10 04:38:20,338 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:20,338 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:20,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:20,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 04:38:20,831 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:20,837 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:20,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2018-11-10 04:38:20,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 04:38:20,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 04:38:20,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-11-10 04:38:20,838 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 15 states. [2018-11-10 04:38:22,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:22,077 INFO L93 Difference]: Finished difference Result 130 states and 163 transitions. [2018-11-10 04:38:22,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 04:38:22,077 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-10 04:38:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:22,078 INFO L225 Difference]: With dead ends: 130 [2018-11-10 04:38:22,078 INFO L226 Difference]: Without dead ends: 96 [2018-11-10 04:38:22,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2018-11-10 04:38:22,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-11-10 04:38:22,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2018-11-10 04:38:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-10 04:38:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2018-11-10 04:38:22,087 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 57 [2018-11-10 04:38:22,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:22,087 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2018-11-10 04:38:22,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 04:38:22,087 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2018-11-10 04:38:22,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-10 04:38:22,088 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:22,088 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] [2018-11-10 04:38:22,088 INFO L424 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:22,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:22,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1504540697, now seen corresponding path program 1 times [2018-11-10 04:38:22,089 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:22,089 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/mathsat Starting monitored process 32 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with mathsat -unsat_core_generation=3 [2018-11-10 04:38:22,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:22,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-10 04:38:22,196 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:22,511 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-10 04:38:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-10 04:38:22,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:38:22,545 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:38:22,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:22,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-10 04:38:22,608 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-10 04:38:22,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 04:38:22,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 9] total 17 [2018-11-10 04:38:22,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 04:38:22,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 04:38:22,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-11-10 04:38:22,820 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 17 states. [2018-11-10 04:38:23,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:23,223 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2018-11-10 04:38:23,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 04:38:23,224 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2018-11-10 04:38:23,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:23,224 INFO L225 Difference]: With dead ends: 92 [2018-11-10 04:38:23,224 INFO L226 Difference]: Without dead ends: 60 [2018-11-10 04:38:23,225 INFO L605 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 [2018-11-10 04:38:23,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-10 04:38:23,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2018-11-10 04:38:23,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-10 04:38:23,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2018-11-10 04:38:23,228 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 61 [2018-11-10 04:38:23,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:23,228 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2018-11-10 04:38:23,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 04:38:23,229 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2018-11-10 04:38:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-10 04:38:23,229 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:23,229 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] [2018-11-10 04:38:23,229 INFO L424 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:23,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:23,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1474938307, now seen corresponding path program 1 times [2018-11-10 04:38:23,230 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:23,230 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:23,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:23,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 04:38:23,463 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:23,471 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:23,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 04:38:23,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 04:38:23,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 04:38:23,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-10 04:38:23,472 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 12 states. [2018-11-10 04:38:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:23,992 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2018-11-10 04:38:23,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 04:38:23,992 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2018-11-10 04:38:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:23,992 INFO L225 Difference]: With dead ends: 79 [2018-11-10 04:38:23,993 INFO L226 Difference]: Without dead ends: 58 [2018-11-10 04:38:23,993 INFO L605 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 [2018-11-10 04:38:23,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-11-10 04:38:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-11-10 04:38:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-10 04:38:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-11-10 04:38:23,996 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 70 [2018-11-10 04:38:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:23,996 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-11-10 04:38:23,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 04:38:23,996 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-11-10 04:38:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-10 04:38:23,996 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:23,996 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] [2018-11-10 04:38:23,996 INFO L424 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:23,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:23,996 INFO L82 PathProgramCache]: Analyzing trace with hash 170055519, now seen corresponding path program 1 times [2018-11-10 04:38:23,997 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:23,997 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:24,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:24,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 04:38:24,301 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:24,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:24,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 04:38:24,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 04:38:24,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 04:38:24,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-10 04:38:24,309 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 12 states. [2018-11-10 04:38:25,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:25,029 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2018-11-10 04:38:25,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 04:38:25,030 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2018-11-10 04:38:25,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:25,030 INFO L225 Difference]: With dead ends: 81 [2018-11-10 04:38:25,030 INFO L226 Difference]: Without dead ends: 60 [2018-11-10 04:38:25,031 INFO L605 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 [2018-11-10 04:38:25,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-10 04:38:25,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2018-11-10 04:38:25,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-10 04:38:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-11-10 04:38:25,034 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 71 [2018-11-10 04:38:25,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:25,034 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-11-10 04:38:25,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 04:38:25,034 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-11-10 04:38:25,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-10 04:38:25,035 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:25,035 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] [2018-11-10 04:38:25,035 INFO L424 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:25,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:25,035 INFO L82 PathProgramCache]: Analyzing trace with hash -684584537, now seen corresponding path program 1 times [2018-11-10 04:38:25,035 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:25,035 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/mathsat Starting monitored process 36 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with mathsat -unsat_core_generation=3 [2018-11-10 04:38:25,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:25,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 04:38:25,207 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 04:38:25,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:38:25,933 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:38:25,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:25,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 04:38:26,009 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:26,558 WARN L179 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-11-10 04:38:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 04:38:26,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 04:38:26,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 17 [2018-11-10 04:38:26,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 04:38:26,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 04:38:26,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-11-10 04:38:26,867 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 17 states. [2018-11-10 04:38:27,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:27,475 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2018-11-10 04:38:27,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 04:38:27,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-11-10 04:38:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:27,476 INFO L225 Difference]: With dead ends: 83 [2018-11-10 04:38:27,476 INFO L226 Difference]: Without dead ends: 68 [2018-11-10 04:38:27,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 262 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2018-11-10 04:38:27,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-10 04:38:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2018-11-10 04:38:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-11-10 04:38:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-11-10 04:38:27,481 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 71 [2018-11-10 04:38:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:27,482 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-11-10 04:38:27,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 04:38:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-11-10 04:38:27,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-10 04:38:27,482 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:27,482 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] [2018-11-10 04:38:27,483 INFO L424 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:27,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:27,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1145801543, now seen corresponding path program 1 times [2018-11-10 04:38:27,483 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:27,483 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:27,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:27,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 04:38:27,778 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:27,785 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:27,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 04:38:27,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 04:38:27,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 04:38:27,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-10 04:38:27,786 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 12 states. [2018-11-10 04:38:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:28,497 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2018-11-10 04:38:28,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 04:38:28,497 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2018-11-10 04:38:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:28,498 INFO L225 Difference]: With dead ends: 85 [2018-11-10 04:38:28,498 INFO L226 Difference]: Without dead ends: 64 [2018-11-10 04:38:28,498 INFO L605 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 [2018-11-10 04:38:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-10 04:38:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2018-11-10 04:38:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-11-10 04:38:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-11-10 04:38:28,503 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 72 [2018-11-10 04:38:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:28,503 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-11-10 04:38:28,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 04:38:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-11-10 04:38:28,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-10 04:38:28,504 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:28,504 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, 1, 1] [2018-11-10 04:38:28,504 INFO L424 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:28,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:28,505 INFO L82 PathProgramCache]: Analyzing trace with hash 56032537, now seen corresponding path program 1 times [2018-11-10 04:38:28,505 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:28,505 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/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 [2018-11-10 04:38:28,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:28,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-10 04:38:28,669 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-10 04:38:28,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:38:28,959 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 04:38:28,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:28,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-11-10 04:38:29,084 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 04:38:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-10 04:38:29,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 04:38:29,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12, 13] total 22 [2018-11-10 04:38:29,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-10 04:38:29,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-10 04:38:29,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2018-11-10 04:38:29,263 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 22 states. [2018-11-10 04:38:29,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:29,708 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2018-11-10 04:38:29,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 04:38:29,709 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2018-11-10 04:38:29,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:29,709 INFO L225 Difference]: With dead ends: 78 [2018-11-10 04:38:29,709 INFO L226 Difference]: Without dead ends: 63 [2018-11-10 04:38:29,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2018-11-10 04:38:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-10 04:38:29,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2018-11-10 04:38:29,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-10 04:38:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2018-11-10 04:38:29,713 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 72 [2018-11-10 04:38:29,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:29,714 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2018-11-10 04:38:29,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-10 04:38:29,714 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2018-11-10 04:38:29,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 04:38:29,714 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:29,714 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] [2018-11-10 04:38:29,714 INFO L424 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:29,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:29,715 INFO L82 PathProgramCache]: Analyzing trace with hash -193403293, now seen corresponding path program 1 times [2018-11-10 04:38:29,715 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:29,715 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/mathsat Starting monitored process 41 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with mathsat -unsat_core_generation=3 [2018-11-10 04:38:29,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:29,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 04:38:30,012 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:30,023 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:30,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 04:38:30,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 04:38:30,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 04:38:30,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-10 04:38:30,024 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 12 states. [2018-11-10 04:38:30,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:30,749 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2018-11-10 04:38:30,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 04:38:30,750 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2018-11-10 04:38:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:30,750 INFO L225 Difference]: With dead ends: 78 [2018-11-10 04:38:30,750 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 04:38:30,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-10 04:38:30,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 04:38:30,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2018-11-10 04:38:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-10 04:38:30,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2018-11-10 04:38:30,756 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 73 [2018-11-10 04:38:30,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:30,756 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2018-11-10 04:38:30,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 04:38:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2018-11-10 04:38:30,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 04:38:30,757 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:38:30,757 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] [2018-11-10 04:38:30,757 INFO L424 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:38:30,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:38:30,757 INFO L82 PathProgramCache]: Analyzing trace with hash 499698404, now seen corresponding path program 1 times [2018-11-10 04:38:30,757 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 04:38:30,757 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/mathsat Starting monitored process 42 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with mathsat -unsat_core_generation=3 [2018-11-10 04:38:30,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:38:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:38:30,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:38:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-10 04:38:30,856 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 04:38:30,867 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:38:30,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 04:38:30,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 04:38:30,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 04:38:30,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 04:38:30,868 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 4 states. [2018-11-10 04:38:30,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:38:30,884 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-11-10 04:38:30,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 04:38:30,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2018-11-10 04:38:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:38:30,886 INFO L225 Difference]: With dead ends: 58 [2018-11-10 04:38:30,886 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 04:38:30,886 INFO L605 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 [2018-11-10 04:38:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 04:38:30,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 04:38:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 04:38:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 04:38:30,887 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2018-11-10 04:38:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:38:30,887 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 04:38:30,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 04:38:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 04:38:30,887 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 04:38:30,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 04:38:31,382 INFO L425 ceAbstractionStarter]: For program point isnan_floatFINAL(line 55) no Hoare annotation was computed. [2018-11-10 04:38:31,382 INFO L428 ceAbstractionStarter]: At program point isnan_floatENTRY(line 55) the Hoare annotation is: true [2018-11-10 04:38:31,382 INFO L425 ceAbstractionStarter]: For program point isnan_floatEXIT(line 55) no Hoare annotation was computed. [2018-11-10 04:38:31,382 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-11-10 04:38:31,382 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-11-10 04:38:31,382 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 04:38:31,382 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 04:38:31,382 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 04:38:31,382 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 04:38:31,382 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 04:38:31,382 INFO L421 ceAbstractionStarter]: At program point L68-3(line 68) the Hoare annotation is: (and (not |main_#t~short9|) (not |main_#t~short13|) (fp.eq main_~x~0 main_~x~0) (= (_ bv0 32) |main_#t~ret7|) (= |main_#t~ret10| (_ bv0 32)) |main_#t~short12|) [2018-11-10 04:38:31,382 INFO L425 ceAbstractionStarter]: For program point L68-4(line 68) no Hoare annotation was computed. [2018-11-10 04:38:31,382 INFO L425 ceAbstractionStarter]: For program point L68-6(line 68) no Hoare annotation was computed. [2018-11-10 04:38:31,382 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 57 86) no Hoare annotation was computed. [2018-11-10 04:38:31,382 INFO L421 ceAbstractionStarter]: At program point L73(line 73) the Hoare annotation is: (let ((.cse1 (fp.eq main_~y~0 main_~y~0)) (.cse0 (fp.eq main_~x~0 main_~x~0))) (or (and (= main_~x~0 main_~res~0) .cse0 (not .cse1)) (and (= main_~y~0 main_~res~0) .cse1 (not .cse0)))) [2018-11-10 04:38:31,383 INFO L425 ceAbstractionStarter]: For program point L73-1(line 73) no Hoare annotation was computed. [2018-11-10 04:38:31,383 INFO L425 ceAbstractionStarter]: For program point L73-2(line 73) no Hoare annotation was computed. [2018-11-10 04:38:31,383 INFO L421 ceAbstractionStarter]: At program point L73-3(line 73) the Hoare annotation is: (and (= main_~y~0 main_~res~0) |main_#t~short17| (= (_ bv1 32) |main_#t~ret15|) (fp.eq main_~y~0 main_~y~0) (not (fp.eq main_~x~0 main_~x~0))) [2018-11-10 04:38:31,383 INFO L425 ceAbstractionStarter]: For program point L73-4(line 73) no Hoare annotation was computed. [2018-11-10 04:38:31,383 INFO L425 ceAbstractionStarter]: For program point L73-6(lines 73 76) no Hoare annotation was computed. [2018-11-10 04:38:31,383 INFO L425 ceAbstractionStarter]: For program point L74(line 74) no Hoare annotation was computed. [2018-11-10 04:38:31,383 INFO L421 ceAbstractionStarter]: At program point L70(line 70) the Hoare annotation is: (let ((.cse1 (fp.eq main_~y~0 main_~y~0)) (.cse0 (fp.eq main_~x~0 main_~x~0))) (or (and .cse0 (not .cse1)) (and .cse1 (not .cse0)))) [2018-11-10 04:38:31,383 INFO L425 ceAbstractionStarter]: For program point L70-1(line 70) no Hoare annotation was computed. [2018-11-10 04:38:31,383 INFO L425 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 80) no Hoare annotation was computed. [2018-11-10 04:38:31,383 INFO L421 ceAbstractionStarter]: At program point L79(line 79) the Hoare annotation is: (or (and (= main_~x~0 main_~res~0) (not (fp.eq main_~y~0 main_~y~0))) (not (fp.eq main_~x~0 main_~x~0))) [2018-11-10 04:38:31,383 INFO L425 ceAbstractionStarter]: For program point L79-1(line 79) no Hoare annotation was computed. [2018-11-10 04:38:31,383 INFO L425 ceAbstractionStarter]: For program point L79-2(line 79) no Hoare annotation was computed. [2018-11-10 04:38:31,383 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 57 86) no Hoare annotation was computed. [2018-11-10 04:38:31,383 INFO L421 ceAbstractionStarter]: At program point L79-3(line 79) the Hoare annotation is: (and (= main_~x~0 main_~res~0) (fp.eq main_~x~0 main_~x~0) |main_#t~short20| (not (fp.eq main_~y~0 main_~y~0))) [2018-11-10 04:38:31,383 INFO L425 ceAbstractionStarter]: For program point L79-4(line 79) no Hoare annotation was computed. [2018-11-10 04:38:31,383 INFO L425 ceAbstractionStarter]: For program point L79-6(lines 79 82) no Hoare annotation was computed. [2018-11-10 04:38:31,383 INFO L428 ceAbstractionStarter]: At program point L67(line 67) the Hoare annotation is: true [2018-11-10 04:38:31,383 INFO L425 ceAbstractionStarter]: For program point L67-1(line 67) no Hoare annotation was computed. [2018-11-10 04:38:31,383 INFO L425 ceAbstractionStarter]: For program point L67-2(line 67) no Hoare annotation was computed. [2018-11-10 04:38:31,383 INFO L421 ceAbstractionStarter]: At program point L67-3(line 67) the Hoare annotation is: (and (= (_ bv1 32) |main_#t~ret7|) |main_#t~short9| (not (fp.eq main_~x~0 main_~x~0))) [2018-11-10 04:38:31,383 INFO L425 ceAbstractionStarter]: For program point L67-4(line 67) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 57 86) the Hoare annotation is: true [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point L67-6(line 67) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point L67-7(lines 67 68) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point L67-9(lines 67 83) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point L67-11(lines 67 83) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point L80(line 80) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 74) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L421 ceAbstractionStarter]: At program point L68(line 68) the Hoare annotation is: (let ((.cse2 (fp.eq main_~x~0 main_~x~0)) (.cse0 (not |main_#t~short9|)) (.cse1 (not |main_#t~short13|))) (or (and .cse0 .cse1 .cse2 (= (_ bv0 32) |main_#t~ret7|)) (and (and (= (_ bv1 32) |main_#t~ret7|) (not .cse2)) (= (bvadd |main_#t~ret8| (_ bv4294967295 32)) (_ bv0 32)) .cse0 .cse1 (not (fp.eq main_~y~0 main_~y~0))))) [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point L68-1(line 68) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point L68-2(line 68) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point fmax_floatEXIT(lines 43 52) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L428 ceAbstractionStarter]: At program point fmax_floatENTRY(lines 43 52) the Hoare annotation is: true [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point L51(line 51) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point L51-2(line 51) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L421 ceAbstractionStarter]: At program point L48(line 48) the Hoare annotation is: (and (= |fmax_float_#in~y| fmax_float_~y) (= |fmax_float_#in~x| fmax_float_~x)) [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point L48-1(lines 48 50) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L421 ceAbstractionStarter]: At program point L44(line 44) the Hoare annotation is: (and (= |fmax_float_#in~y| fmax_float_~y) (= |fmax_float_#in~x| fmax_float_~x)) [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point L44-1(lines 44 46) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point fmax_floatFINAL(lines 43 52) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point L31(lines 31 40) no Hoare annotation was computed. [2018-11-10 04:38:31,384 INFO L425 ceAbstractionStarter]: For program point __fpclassify_floatFINAL(lines 20 41) no Hoare annotation was computed. [2018-11-10 04:38:31,385 INFO L425 ceAbstractionStarter]: For program point L23-1(lines 23 27) no Hoare annotation was computed. [2018-11-10 04:38:31,385 INFO L421 ceAbstractionStarter]: At program point L23-3(lines 23 27) the Hoare annotation is: (= __fpclassify_float_~x |__fpclassify_float_#in~x|) [2018-11-10 04:38:31,385 INFO L425 ceAbstractionStarter]: For program point L23-4(lines 20 41) no Hoare annotation was computed. [2018-11-10 04:38:31,385 INFO L425 ceAbstractionStarter]: For program point L34(lines 34 40) no Hoare annotation was computed. [2018-11-10 04:38:31,385 INFO L428 ceAbstractionStarter]: At program point __fpclassify_floatENTRY(lines 20 41) the Hoare annotation is: true [2018-11-10 04:38:31,385 INFO L425 ceAbstractionStarter]: For program point __fpclassify_floatEXIT(lines 20 41) no Hoare annotation was computed. [2018-11-10 04:38:31,385 INFO L425 ceAbstractionStarter]: For program point L37(lines 37 40) no Hoare annotation was computed. [2018-11-10 04:38:31,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 04:38:31 BoogieIcfgContainer [2018-11-10 04:38:31,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 04:38:31,392 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 04:38:31,392 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 04:38:31,393 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 04:38:31,393 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:38:01" (3/4) ... [2018-11-10 04:38:31,395 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 04:38:31,400 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2018-11-10 04:38:31,400 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 04:38:31,400 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 04:38:31,400 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fmax_float [2018-11-10 04:38:31,400 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2018-11-10 04:38:31,405 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 28 nodes and edges [2018-11-10 04:38:31,405 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2018-11-10 04:38:31,405 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-10 04:38:31,421 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: x == \old(x) [2018-11-10 04:38:31,441 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_211cc87b-8db7-4a10-920d-93271daaf9d4/bin-2019/utaipan/witness.graphml [2018-11-10 04:38:31,441 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 04:38:31,441 INFO L168 Benchmark]: Toolchain (without parser) took 30444.51 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 400.6 MB). Free memory was 949.7 MB in the beginning and 1.4 GB in the end (delta: -428.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:38:31,442 INFO L168 Benchmark]: CDTParser took 0.17 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. [2018-11-10 04:38:31,442 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.47 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 933.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-10 04:38:31,442 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.26 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:38:31,442 INFO L168 Benchmark]: Boogie Preprocessor took 19.73 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:38:31,442 INFO L168 Benchmark]: RCFGBuilder took 307.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -168.0 MB). Peak memory consumption was 21.3 MB. Max. memory is 11.5 GB. [2018-11-10 04:38:31,443 INFO L168 Benchmark]: TraceAbstraction took 29837.15 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 269.0 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -288.5 MB). Peak memory consumption was 575.6 MB. Max. memory is 11.5 GB. [2018-11-10 04:38:31,443 INFO L168 Benchmark]: Witness Printer took 48.47 ms. Allocated memory is still 1.4 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 11.5 GB. [2018-11-10 04:38:31,444 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 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 199.47 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 933.6 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 29.26 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.73 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 307.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -168.0 MB). Peak memory consumption was 21.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 29837.15 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 269.0 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -288.5 MB). Peak memory consumption was 575.6 MB. Max. memory is 11.5 GB. * Witness Printer took 48.47 ms. Allocated memory is still 1.4 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 74]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 80]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: x == \old(x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 2 error locations. SAFE Result, 29.7s OverallTime, 30 OverallIterations, 6 TraceHistogramMax, 14.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.4s HoareAnnotationTime, HoareTripleCheckerStatistics: 2060 SDtfs, 1239 SDslu, 12907 SDs, 0 SdLazy, 6688 SolverSat, 405 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3500 GetRequests, 3101 SyntacticMatches, 13 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 9.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 30 MinimizatonAttempts, 348 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 169 PreInvPairs, 193 NumberOfFragments, 163 HoareAnnotationTreeSize, 169 FomulaSimplifications, 24761 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 19 FomulaSimplificationsInter, 71 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 11.6s InterpolantComputationTime, 2386 NumberOfCodeBlocks, 2386 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 3261 ConstructedInterpolants, 49 QuantifiedInterpolants, 645740 SizeOfPredicates, 210 NumberOfNonLiveVariables, 6026 ConjunctsInSsa, 426 ConjunctsInUnsatCore, 56 InterpolantComputations, 23 PerfectInterpolantSequences, 1632/1846 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...