./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 65a8838494b0fa2a560742eb829642f08a5d8cc8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 65a8838494b0fa2a560742eb829642f08a5d8cc8 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 19:26:42,344 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 19:26:42,345 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 19:26:42,351 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 19:26:42,351 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 19:26:42,352 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 19:26:42,353 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 19:26:42,354 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 19:26:42,354 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 19:26:42,355 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 19:26:42,355 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 19:26:42,356 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 19:26:42,356 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 19:26:42,357 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 19:26:42,357 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 19:26:42,358 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 19:26:42,358 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 19:26:42,359 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 19:26:42,360 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 19:26:42,361 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 19:26:42,361 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 19:26:42,362 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 19:26:42,363 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 19:26:42,363 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 19:26:42,363 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 19:26:42,364 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 19:26:42,365 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 19:26:42,365 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 19:26:42,365 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 19:26:42,366 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 19:26:42,366 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 19:26:42,366 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 19:26:42,367 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 19:26:42,367 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 19:26:42,367 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 19:26:42,368 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 19:26:42,368 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 19:26:42,375 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 19:26:42,375 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 19:26:42,376 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 19:26:42,376 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 19:26:42,376 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 19:26:42,376 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 19:26:42,376 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 19:26:42,376 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 19:26:42,376 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 19:26:42,376 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 19:26:42,376 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 19:26:42,376 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 19:26:42,377 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 19:26:42,377 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 19:26:42,377 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 19:26:42,377 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 19:26:42,377 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 19:26:42,377 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 19:26:42,377 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 19:26:42,377 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 19:26:42,378 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 19:26:42,378 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 19:26:42,378 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 19:26:42,378 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 19:26:42,378 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 19:26:42,378 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 19:26:42,378 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 19:26:42,378 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 19:26:42,378 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:26:42,378 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 19:26:42,378 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 19:26:42,379 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 19:26:42,379 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 19:26:42,379 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 19:26:42,379 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 19:26:42,379 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 19:26:42,379 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_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65a8838494b0fa2a560742eb829642f08a5d8cc8 [2018-12-09 19:26:42,396 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 19:26:42,403 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 19:26:42,405 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 19:26:42,405 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 19:26:42,406 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 19:26:42,406 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-12-09 19:26:42,441 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/data/4f997119b/62ad67a1276a4c01ac67caea164e13b8/FLAG7fa63f753 [2018-12-09 19:26:42,813 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 19:26:42,814 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-12-09 19:26:42,818 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/data/4f997119b/62ad67a1276a4c01ac67caea164e13b8/FLAG7fa63f753 [2018-12-09 19:26:43,185 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/data/4f997119b/62ad67a1276a4c01ac67caea164e13b8 [2018-12-09 19:26:43,187 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 19:26:43,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 19:26:43,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 19:26:43,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 19:26:43,191 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 19:26:43,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:26:43" (1/1) ... [2018-12-09 19:26:43,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a347b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:43, skipping insertion in model container [2018-12-09 19:26:43,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:26:43" (1/1) ... [2018-12-09 19:26:43,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 19:26:43,211 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 19:26:43,307 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:26:43,309 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 19:26:43,328 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:26:43,341 INFO L195 MainTranslator]: Completed translation [2018-12-09 19:26:43,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:43 WrapperNode [2018-12-09 19:26:43,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 19:26:43,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 19:26:43,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 19:26:43,342 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 19:26:43,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:43" (1/1) ... [2018-12-09 19:26:43,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:43" (1/1) ... [2018-12-09 19:26:43,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 19:26:43,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 19:26:43,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 19:26:43,357 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 19:26:43,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:43" (1/1) ... [2018-12-09 19:26:43,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:43" (1/1) ... [2018-12-09 19:26:43,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:43" (1/1) ... [2018-12-09 19:26:43,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:43" (1/1) ... [2018-12-09 19:26:43,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:43" (1/1) ... [2018-12-09 19:26:43,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:43" (1/1) ... [2018-12-09 19:26:43,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:43" (1/1) ... [2018-12-09 19:26:43,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 19:26:43,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 19:26:43,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 19:26:43,404 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 19:26:43,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:26:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 19:26:43,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 19:26:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-12-09 19:26:43,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-12-09 19:26:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-12-09 19:26:43,439 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-12-09 19:26:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2018-12-09 19:26:43,439 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2018-12-09 19:26:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 19:26:43,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 19:26:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2018-12-09 19:26:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 19:26:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 19:26:43,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 19:26:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 19:26:43,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 19:26:43,600 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 19:26:43,601 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-09 19:26:43,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:26:43 BoogieIcfgContainer [2018-12-09 19:26:43,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 19:26:43,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 19:26:43,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 19:26:43,604 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 19:26:43,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:26:43" (1/3) ... [2018-12-09 19:26:43,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57107e9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:26:43, skipping insertion in model container [2018-12-09 19:26:43,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:43" (2/3) ... [2018-12-09 19:26:43,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57107e9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:26:43, skipping insertion in model container [2018-12-09 19:26:43,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:26:43" (3/3) ... [2018-12-09 19:26:43,606 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231_true-unreach-call.c [2018-12-09 19:26:43,613 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 19:26:43,618 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-12-09 19:26:43,628 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-12-09 19:26:43,647 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 19:26:43,647 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 19:26:43,647 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 19:26:43,647 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 19:26:43,647 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 19:26:43,647 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 19:26:43,647 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 19:26:43,648 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 19:26:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2018-12-09 19:26:43,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-09 19:26:43,662 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:43,663 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:43,665 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:43,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:43,668 INFO L82 PathProgramCache]: Analyzing trace with hash -388929614, now seen corresponding path program 1 times [2018-12-09 19:26:43,669 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:26:43,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:26:43,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:43,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:26:43,698 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:26:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 19:26:43,756 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:43,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 19:26:43,756 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:26:43,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 19:26:43,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 19:26:43,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 19:26:43,768 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2018-12-09 19:26:43,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:43,783 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions. [2018-12-09 19:26:43,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 19:26:43,784 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 36 [2018-12-09 19:26:43,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:43,790 INFO L225 Difference]: With dead ends: 109 [2018-12-09 19:26:43,790 INFO L226 Difference]: Without dead ends: 61 [2018-12-09 19:26:43,792 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 19:26:43,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-09 19:26:43,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-12-09 19:26:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-09 19:26:43,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-12-09 19:26:43,818 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-12-09 19:26:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:43,819 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-12-09 19:26:43,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 19:26:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-12-09 19:26:43,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-09 19:26:43,821 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:43,821 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:43,821 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:43,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:43,822 INFO L82 PathProgramCache]: Analyzing trace with hash 689386628, now seen corresponding path program 1 times [2018-12-09 19:26:43,822 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:26:43,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:26:43,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:43,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:26:43,823 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:26:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 19:26:43,863 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:43,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:26:43,864 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:26:43,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:26:43,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:26:43,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:43,865 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-12-09 19:26:43,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:43,908 INFO L93 Difference]: Finished difference Result 112 states and 147 transitions. [2018-12-09 19:26:43,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 19:26:43,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-12-09 19:26:43,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:43,910 INFO L225 Difference]: With dead ends: 112 [2018-12-09 19:26:43,910 INFO L226 Difference]: Without dead ends: 70 [2018-12-09 19:26:43,911 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:26:43,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-09 19:26:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2018-12-09 19:26:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-09 19:26:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2018-12-09 19:26:43,920 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 37 [2018-12-09 19:26:43,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:43,920 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2018-12-09 19:26:43,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:26:43,920 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2018-12-09 19:26:43,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-09 19:26:43,921 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:43,921 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:43,922 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:43,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:43,922 INFO L82 PathProgramCache]: Analyzing trace with hash 644534487, now seen corresponding path program 1 times [2018-12-09 19:26:43,922 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:26:43,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:26:43,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:43,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:26:43,923 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:26:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-09 19:26:43,971 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:43,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:26:43,971 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:26:43,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:26:43,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:26:43,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:43,972 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2018-12-09 19:26:43,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:43,990 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2018-12-09 19:26:43,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:26:43,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-12-09 19:26:43,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:43,992 INFO L225 Difference]: With dead ends: 89 [2018-12-09 19:26:43,992 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 19:26:43,992 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:43,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 19:26:43,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-12-09 19:26:43,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-09 19:26:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-12-09 19:26:43,996 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 42 [2018-12-09 19:26:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:43,997 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-12-09 19:26:43,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:26:43,997 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-12-09 19:26:43,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-09 19:26:43,997 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:43,997 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:43,998 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:43,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:43,998 INFO L82 PathProgramCache]: Analyzing trace with hash 768889016, now seen corresponding path program 1 times [2018-12-09 19:26:43,998 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:26:43,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:26:43,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:43,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:26:43,999 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:26:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-09 19:26:44,032 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:44,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:26:44,032 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:26:44,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:26:44,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:26:44,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:44,033 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 4 states. [2018-12-09 19:26:44,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:44,054 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2018-12-09 19:26:44,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:26:44,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2018-12-09 19:26:44,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:44,055 INFO L225 Difference]: With dead ends: 93 [2018-12-09 19:26:44,055 INFO L226 Difference]: Without dead ends: 71 [2018-12-09 19:26:44,055 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-09 19:26:44,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-12-09 19:26:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-09 19:26:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-12-09 19:26:44,059 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 45 [2018-12-09 19:26:44,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:44,059 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-12-09 19:26:44,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:26:44,059 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-12-09 19:26:44,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-09 19:26:44,060 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:44,060 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:44,060 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:44,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:44,061 INFO L82 PathProgramCache]: Analyzing trace with hash 258354839, now seen corresponding path program 1 times [2018-12-09 19:26:44,061 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:26:44,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:26:44,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:44,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:26:44,062 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:26:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-09 19:26:44,087 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:44,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 19:26:44,087 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:26:44,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 19:26:44,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 19:26:44,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 19:26:44,088 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 3 states. [2018-12-09 19:26:44,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:44,102 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2018-12-09 19:26:44,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 19:26:44,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2018-12-09 19:26:44,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:44,103 INFO L225 Difference]: With dead ends: 70 [2018-12-09 19:26:44,104 INFO L226 Difference]: Without dead ends: 68 [2018-12-09 19:26:44,104 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 19:26:44,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-09 19:26:44,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-09 19:26:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-09 19:26:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2018-12-09 19:26:44,110 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 45 [2018-12-09 19:26:44,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:44,110 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2018-12-09 19:26:44,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 19:26:44,110 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2018-12-09 19:26:44,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-12-09 19:26:44,111 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:44,112 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:44,112 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:44,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:44,112 INFO L82 PathProgramCache]: Analyzing trace with hash -2126980749, now seen corresponding path program 1 times [2018-12-09 19:26:44,112 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:26:44,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:26:44,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:44,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:26:44,113 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:26:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 19:26:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 19:26:44,163 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 19:26:44,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:26:44 BoogieIcfgContainer [2018-12-09 19:26:44,188 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 19:26:44,189 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 19:26:44,189 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 19:26:44,189 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 19:26:44,189 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:26:43" (3/4) ... [2018-12-09 19:26:44,192 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 19:26:44,192 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 19:26:44,192 INFO L168 Benchmark]: Toolchain (without parser) took 1004.93 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 87.0 MB). Free memory was 957.8 MB in the beginning and 971.0 MB in the end (delta: -13.3 MB). Peak memory consumption was 73.7 MB. Max. memory is 11.5 GB. [2018-12-09 19:26:44,193 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:26:44,194 INFO L168 Benchmark]: CACSL2BoogieTranslator took 152.38 ms. Allocated memory is still 1.0 GB. Free memory was 957.8 MB in the beginning and 947.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 19:26:44,194 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.71 ms. Allocated memory is still 1.0 GB. Free memory was 947.0 MB in the beginning and 941.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-09 19:26:44,195 INFO L168 Benchmark]: Boogie Preprocessor took 47.52 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 87.0 MB). Free memory was 941.7 MB in the beginning and 1.1 GB in the end (delta: -136.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. [2018-12-09 19:26:44,195 INFO L168 Benchmark]: RCFGBuilder took 197.10 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 11.5 GB. [2018-12-09 19:26:44,196 INFO L168 Benchmark]: TraceAbstraction took 586.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 971.0 MB in the end (delta: 85.1 MB). Peak memory consumption was 85.1 MB. Max. memory is 11.5 GB. [2018-12-09 19:26:44,196 INFO L168 Benchmark]: Witness Printer took 3.19 ms. Allocated memory is still 1.1 GB. Free memory is still 971.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:26:44,198 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 152.38 ms. Allocated memory is still 1.0 GB. Free memory was 957.8 MB in the beginning and 947.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.71 ms. Allocated memory is still 1.0 GB. Free memory was 947.0 MB in the beginning and 941.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 47.52 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 87.0 MB). Free memory was 941.7 MB in the beginning and 1.1 GB in the end (delta: -136.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. * RCFGBuilder took 197.10 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 586.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 971.0 MB in the end (delta: 85.1 MB). Peak memory consumption was 85.1 MB. Max. memory is 11.5 GB. * Witness Printer took 3.19 ms. Allocated memory is still 1.1 GB. Free memory is still 971.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 75]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 74. Possible FailurePath: [L66] float x = __VERIFIER_nondet_float(); [L67] float y = __VERIFIER_nondet_float(); [L68] CALL, EXPR isnan_float(x) VAL [\old(x)=2139095044] [L57] return x != x; VAL [\old(x)=2139095044, \result=1, x=2139095044] [L68] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, x=2139095044, y=2139095043] [L68] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, x=2139095044, y=2139095043] [L68] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L57] return x != x; VAL [\old(x)=2139095043, \result=0, x=2139095043] [L68] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095044, y=2139095043] [L68] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095044, y=2139095043] [L68-L69] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) VAL [(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))=1, isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095044, y=2139095043] [L68-L69] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L71] CALL, EXPR fmin_float(x, y) VAL [\old(x)=2139095044, \old(y)=2139095043] [L36] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=2139095044] [L13] __uint32_t w; VAL [\old(x)=2139095044, x=2139095044] [L16] ieee_float_shape_type gf_u; [L17] gf_u.value = (x) [L18] EXPR gf_u.word [L18] (w) = gf_u.word [L21] COND FALSE !(w == 0x00000000 || w == 0x80000000) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L23-L24] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L26-L27] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) VAL [\old(x)=2139095044, w=2139095041, x=2139095044] [L29] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L32] return 0; VAL [\old(x)=2139095044, \result=0, w=2139095041, x=2139095044] [L36] RET, EXPR __fpclassify_float(x) VAL [\old(x)=2139095044, \old(y)=2139095043, __fpclassify_float(x)=0, x=2139095044, y=2139095043] [L36] COND TRUE __fpclassify_float(x) == 0 [L37] return y; VAL [\old(x)=2139095044, \old(y)=2139095043, \result=2139095043, x=2139095044, y=2139095043] [L71] RET, EXPR fmin_float(x, y) VAL [fmin_float(x, y)=2139095043, x=2139095044, y=2139095043] [L71] float res = fmin_float(x, y); [L74] CALL, EXPR isnan_float(x) VAL [\old(x)=2139095044] [L57] return x != x; VAL [\old(x)=2139095044, \result=1, x=2139095044] [L74] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, res=2139095043, x=2139095044, y=2139095043] [L74] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, res=2139095043, x=2139095044, y=2139095043] [L74] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L57] return x != x; VAL [\old(x)=2139095043, \result=0, x=2139095043] [L74] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=2139095043, x=2139095044, y=2139095043] [L74] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=2139095043, x=2139095044, y=2139095043] [L74] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L75] __VERIFIER_error() VAL [res=2139095043, x=2139095044, y=2139095043] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 66 locations, 2 error locations. UNSAFE Result, 0.5s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 407 SDtfs, 16 SDslu, 523 SDs, 0 SdLazy, 40 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 255 NumberOfCodeBlocks, 255 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 200 ConstructedInterpolants, 0 QuantifiedInterpolants, 8870 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 33/33 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-09 19:26:45,530 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 19:26:45,531 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 19:26:45,537 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 19:26:45,537 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 19:26:45,538 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 19:26:45,538 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 19:26:45,539 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 19:26:45,540 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 19:26:45,540 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 19:26:45,541 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 19:26:45,541 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 19:26:45,541 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 19:26:45,542 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 19:26:45,542 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 19:26:45,543 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 19:26:45,543 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 19:26:45,544 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 19:26:45,545 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 19:26:45,545 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 19:26:45,546 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 19:26:45,546 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 19:26:45,547 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 19:26:45,548 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 19:26:45,548 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 19:26:45,548 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 19:26:45,548 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 19:26:45,549 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 19:26:45,549 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 19:26:45,550 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 19:26:45,550 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 19:26:45,550 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 19:26:45,550 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 19:26:45,550 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 19:26:45,551 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 19:26:45,551 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 19:26:45,551 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-12-09 19:26:45,558 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 19:26:45,558 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 19:26:45,559 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 19:26:45,559 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 19:26:45,559 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 19:26:45,559 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 19:26:45,559 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 19:26:45,559 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 19:26:45,559 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 19:26:45,560 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 19:26:45,560 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 19:26:45,560 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 19:26:45,560 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 19:26:45,560 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 19:26:45,560 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 19:26:45,560 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 19:26:45,560 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 19:26:45,561 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-09 19:26:45,561 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-09 19:26:45,561 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 19:26:45,561 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 19:26:45,561 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 19:26:45,561 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 19:26:45,561 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 19:26:45,561 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 19:26:45,561 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 19:26:45,561 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 19:26:45,561 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:26:45,562 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 19:26:45,562 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 19:26:45,562 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 19:26:45,562 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-09 19:26:45,562 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 19:26:45,562 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-09 19:26:45,562 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-09 19:26:45,562 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_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65a8838494b0fa2a560742eb829642f08a5d8cc8 [2018-12-09 19:26:45,580 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 19:26:45,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 19:26:45,590 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 19:26:45,591 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 19:26:45,591 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 19:26:45,591 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-12-09 19:26:45,628 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/data/7adf16ee8/96e900ca54dc45328deabf3c6cc18e1d/FLAG6084c9410 [2018-12-09 19:26:46,017 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 19:26:46,018 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-12-09 19:26:46,023 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/data/7adf16ee8/96e900ca54dc45328deabf3c6cc18e1d/FLAG6084c9410 [2018-12-09 19:26:46,031 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/data/7adf16ee8/96e900ca54dc45328deabf3c6cc18e1d [2018-12-09 19:26:46,033 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 19:26:46,034 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 19:26:46,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 19:26:46,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 19:26:46,037 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 19:26:46,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:26:46" (1/1) ... [2018-12-09 19:26:46,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a0bb1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:46, skipping insertion in model container [2018-12-09 19:26:46,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:26:46" (1/1) ... [2018-12-09 19:26:46,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 19:26:46,054 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 19:26:46,172 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:26:46,176 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 19:26:46,195 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:26:46,212 INFO L195 MainTranslator]: Completed translation [2018-12-09 19:26:46,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:46 WrapperNode [2018-12-09 19:26:46,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 19:26:46,213 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 19:26:46,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 19:26:46,213 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 19:26:46,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:46" (1/1) ... [2018-12-09 19:26:46,226 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:46" (1/1) ... [2018-12-09 19:26:46,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 19:26:46,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 19:26:46,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 19:26:46,231 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 19:26:46,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:46" (1/1) ... [2018-12-09 19:26:46,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:46" (1/1) ... [2018-12-09 19:26:46,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:46" (1/1) ... [2018-12-09 19:26:46,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:46" (1/1) ... [2018-12-09 19:26:46,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:46" (1/1) ... [2018-12-09 19:26:46,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:46" (1/1) ... [2018-12-09 19:26:46,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:46" (1/1) ... [2018-12-09 19:26:46,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 19:26:46,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 19:26:46,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 19:26:46,257 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 19:26:46,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:26:46,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 19:26:46,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 19:26:46,325 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-12-09 19:26:46,326 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-12-09 19:26:46,326 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-12-09 19:26:46,326 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-12-09 19:26:46,326 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2018-12-09 19:26:46,326 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2018-12-09 19:26:46,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 19:26:46,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 19:26:46,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 19:26:46,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-12-09 19:26:46,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 19:26:46,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 19:26:46,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2018-12-09 19:26:46,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 19:26:46,484 WARN L317 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 19:26:46,510 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 19:26:46,510 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-09 19:26:46,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:26:46 BoogieIcfgContainer [2018-12-09 19:26:46,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 19:26:46,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 19:26:46,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 19:26:46,513 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 19:26:46,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:26:46" (1/3) ... [2018-12-09 19:26:46,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aea11a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:26:46, skipping insertion in model container [2018-12-09 19:26:46,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:26:46" (2/3) ... [2018-12-09 19:26:46,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aea11a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:26:46, skipping insertion in model container [2018-12-09 19:26:46,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:26:46" (3/3) ... [2018-12-09 19:26:46,515 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231_true-unreach-call.c [2018-12-09 19:26:46,520 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 19:26:46,524 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-12-09 19:26:46,533 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-12-09 19:26:46,550 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 19:26:46,550 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 19:26:46,550 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 19:26:46,550 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 19:26:46,551 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 19:26:46,551 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 19:26:46,551 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 19:26:46,551 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 19:26:46,551 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 19:26:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-12-09 19:26:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-09 19:26:46,564 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:46,565 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:46,566 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:46,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:46,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1017347723, now seen corresponding path program 1 times [2018-12-09 19:26:46,572 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:46,572 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:46,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:46,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:26:46,639 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:26:46,647 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:46,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 19:26:46,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 19:26:46,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 19:26:46,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 19:26:46,658 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-12-09 19:26:46,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:46,674 INFO L93 Difference]: Finished difference Result 105 states and 146 transitions. [2018-12-09 19:26:46,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 19:26:46,675 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 35 [2018-12-09 19:26:46,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:46,683 INFO L225 Difference]: With dead ends: 105 [2018-12-09 19:26:46,683 INFO L226 Difference]: Without dead ends: 59 [2018-12-09 19:26:46,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 19:26:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-09 19:26:46,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-09 19:26:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-09 19:26:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2018-12-09 19:26:46,716 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 35 [2018-12-09 19:26:46,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:46,718 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2018-12-09 19:26:46,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 19:26:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2018-12-09 19:26:46,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-09 19:26:46,720 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:46,720 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:46,720 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:46,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:46,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1223757215, now seen corresponding path program 1 times [2018-12-09 19:26:46,721 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:46,721 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:46,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:46,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:26:46,788 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:26:46,795 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:46,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:26:46,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:26:46,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:26:46,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:46,797 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2018-12-09 19:26:46,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:46,828 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2018-12-09 19:26:46,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 19:26:46,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-12-09 19:26:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:46,829 INFO L225 Difference]: With dead ends: 108 [2018-12-09 19:26:46,829 INFO L226 Difference]: Without dead ends: 68 [2018-12-09 19:26:46,830 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:26:46,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-09 19:26:46,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2018-12-09 19:26:46,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-09 19:26:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-12-09 19:26:46,836 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-12-09 19:26:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:46,836 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-12-09 19:26:46,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:26:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-12-09 19:26:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-09 19:26:46,837 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:46,837 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:46,838 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:46,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:46,838 INFO L82 PathProgramCache]: Analyzing trace with hash 435900908, now seen corresponding path program 1 times [2018-12-09 19:26:46,838 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:46,838 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:46,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:46,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 19:26:46,888 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:26:46,895 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:46,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:26:46,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:26:46,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:26:46,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:46,896 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-12-09 19:26:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:46,914 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2018-12-09 19:26:46,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:26:46,914 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-12-09 19:26:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:46,916 INFO L225 Difference]: With dead ends: 86 [2018-12-09 19:26:46,916 INFO L226 Difference]: Without dead ends: 64 [2018-12-09 19:26:46,916 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-09 19:26:46,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-12-09 19:26:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 19:26:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-09 19:26:46,922 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 41 [2018-12-09 19:26:46,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:46,922 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-09 19:26:46,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:26:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-09 19:26:46,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-09 19:26:46,923 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:46,923 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:46,923 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:46,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:46,924 INFO L82 PathProgramCache]: Analyzing trace with hash -588522803, now seen corresponding path program 1 times [2018-12-09 19:26:46,924 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:46,924 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:46,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:46,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 19:26:46,976 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:26:46,985 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:46,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:26:46,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:26:46,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:26:46,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:46,986 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-12-09 19:26:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:47,005 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-09 19:26:47,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:26:47,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-12-09 19:26:47,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:47,006 INFO L225 Difference]: With dead ends: 89 [2018-12-09 19:26:47,007 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 19:26:47,007 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:47,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 19:26:47,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-12-09 19:26:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 19:26:47,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-09 19:26:47,014 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 42 [2018-12-09 19:26:47,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:47,015 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-09 19:26:47,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:26:47,015 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-09 19:26:47,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-09 19:26:47,016 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:47,016 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:47,017 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:47,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:47,017 INFO L82 PathProgramCache]: Analyzing trace with hash -545646832, now seen corresponding path program 1 times [2018-12-09 19:26:47,017 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:47,017 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:47,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:47,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 19:26:47,075 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:26:47,081 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:47,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:26:47,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:26:47,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:26:47,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:47,082 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-12-09 19:26:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:47,100 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-09 19:26:47,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:26:47,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-12-09 19:26:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:47,101 INFO L225 Difference]: With dead ends: 89 [2018-12-09 19:26:47,101 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 19:26:47,102 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:47,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 19:26:47,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-12-09 19:26:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 19:26:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-09 19:26:47,106 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 43 [2018-12-09 19:26:47,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:47,106 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-09 19:26:47,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:26:47,106 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-09 19:26:47,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-09 19:26:47,107 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:47,107 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:47,107 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:47,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:47,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1776219087, now seen corresponding path program 1 times [2018-12-09 19:26:47,108 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:47,108 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:47,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:47,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 19:26:47,152 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:26:47,158 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:47,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:26:47,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:26:47,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:26:47,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:47,159 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-12-09 19:26:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:47,176 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-09 19:26:47,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:26:47,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-12-09 19:26:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:47,177 INFO L225 Difference]: With dead ends: 89 [2018-12-09 19:26:47,177 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 19:26:47,177 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 19:26:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-12-09 19:26:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 19:26:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-09 19:26:47,181 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 44 [2018-12-09 19:26:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:47,181 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-09 19:26:47,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:26:47,182 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-09 19:26:47,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-09 19:26:47,182 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:47,182 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:47,182 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:47,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:47,183 INFO L82 PathProgramCache]: Analyzing trace with hash -268667278, now seen corresponding path program 1 times [2018-12-09 19:26:47,183 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:47,183 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:47,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:47,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-09 19:26:47,305 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:26:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 19:26:47,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:26:47,513 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:26:47,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:47,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-09 19:26:47,550 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:26:47,564 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 19:26:47,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 14 [2018-12-09 19:26:47,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-09 19:26:47,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-09 19:26:47,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-12-09 19:26:47,565 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 14 states. [2018-12-09 19:26:47,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:47,908 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2018-12-09 19:26:47,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 19:26:47,908 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2018-12-09 19:26:47,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:47,909 INFO L225 Difference]: With dead ends: 105 [2018-12-09 19:26:47,909 INFO L226 Difference]: Without dead ends: 91 [2018-12-09 19:26:47,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-12-09 19:26:47,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-12-09 19:26:47,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2018-12-09 19:26:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-12-09 19:26:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2018-12-09 19:26:47,916 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 44 [2018-12-09 19:26:47,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:47,916 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2018-12-09 19:26:47,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-09 19:26:47,916 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2018-12-09 19:26:47,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-09 19:26:47,917 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:47,917 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:47,917 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:47,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash 798294838, now seen corresponding path program 1 times [2018-12-09 19:26:47,917 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:47,918 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:47,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:47,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 19:26:48,093 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:26:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 19:26:48,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:26:48,572 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:26:48,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:48,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-09 19:26:48,828 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:26:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 19:26:49,194 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:26:49,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11, 11] total 29 [2018-12-09 19:26:49,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-09 19:26:49,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-09 19:26:49,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2018-12-09 19:26:49,195 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand 29 states. [2018-12-09 19:26:50,467 WARN L180 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-12-09 19:26:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:51,717 INFO L93 Difference]: Finished difference Result 136 states and 179 transitions. [2018-12-09 19:26:51,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-09 19:26:51,718 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 49 [2018-12-09 19:26:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:51,719 INFO L225 Difference]: With dead ends: 136 [2018-12-09 19:26:51,719 INFO L226 Difference]: Without dead ends: 134 [2018-12-09 19:26:51,719 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2018-12-09 19:26:51,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-12-09 19:26:51,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2018-12-09 19:26:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-09 19:26:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2018-12-09 19:26:51,727 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 49 [2018-12-09 19:26:51,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:51,727 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2018-12-09 19:26:51,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-09 19:26:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2018-12-09 19:26:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-09 19:26:51,728 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:51,728 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:51,728 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:51,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:51,728 INFO L82 PathProgramCache]: Analyzing trace with hash 654857827, now seen corresponding path program 1 times [2018-12-09 19:26:51,729 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:51,729 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:51,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:51,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 19:26:51,820 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:26:51,828 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:51,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-09 19:26:51,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 19:26:51,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 19:26:51,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-12-09 19:26:51,829 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand 8 states. [2018-12-09 19:26:52,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:52,079 INFO L93 Difference]: Finished difference Result 158 states and 208 transitions. [2018-12-09 19:26:52,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 19:26:52,079 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2018-12-09 19:26:52,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:52,080 INFO L225 Difference]: With dead ends: 158 [2018-12-09 19:26:52,080 INFO L226 Difference]: Without dead ends: 105 [2018-12-09 19:26:52,081 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-12-09 19:26:52,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-12-09 19:26:52,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2018-12-09 19:26:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-09 19:26:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2018-12-09 19:26:52,088 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 53 [2018-12-09 19:26:52,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:52,088 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2018-12-09 19:26:52,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 19:26:52,088 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2018-12-09 19:26:52,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-09 19:26:52,089 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:52,089 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:52,090 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:52,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:52,090 INFO L82 PathProgramCache]: Analyzing trace with hash -26719360, now seen corresponding path program 1 times [2018-12-09 19:26:52,090 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:52,090 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:52,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:52,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 19:26:52,195 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:26:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 19:26:52,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:26:52,391 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:26:52,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:52,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-12-09 19:26:52,425 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:26:52,439 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 19:26:52,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 9] total 13 [2018-12-09 19:26:52,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 19:26:52,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 19:26:52,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-12-09 19:26:52,440 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand 13 states. [2018-12-09 19:26:52,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:52,685 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2018-12-09 19:26:52,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 19:26:52,685 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2018-12-09 19:26:52,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:52,686 INFO L225 Difference]: With dead ends: 110 [2018-12-09 19:26:52,686 INFO L226 Difference]: Without dead ends: 106 [2018-12-09 19:26:52,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-12-09 19:26:52,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-12-09 19:26:52,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2018-12-09 19:26:52,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-09 19:26:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2018-12-09 19:26:52,692 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 58 [2018-12-09 19:26:52,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:52,692 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2018-12-09 19:26:52,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 19:26:52,692 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2018-12-09 19:26:52,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-09 19:26:52,693 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:52,693 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:52,693 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:52,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:52,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2129131098, now seen corresponding path program 1 times [2018-12-09 19:26:52,694 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:52,694 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:52,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:52,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 19:26:52,752 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:26:52,760 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:52,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:26:52,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:26:52,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:26:52,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:52,761 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand 4 states. [2018-12-09 19:26:52,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:52,773 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2018-12-09 19:26:52,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:26:52,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2018-12-09 19:26:52,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:52,774 INFO L225 Difference]: With dead ends: 119 [2018-12-09 19:26:52,774 INFO L226 Difference]: Without dead ends: 92 [2018-12-09 19:26:52,774 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:52,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-12-09 19:26:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-12-09 19:26:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-09 19:26:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-12-09 19:26:52,779 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 61 [2018-12-09 19:26:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:52,779 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-12-09 19:26:52,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:26:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-12-09 19:26:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-12-09 19:26:52,780 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:52,780 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:52,780 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:52,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:52,780 INFO L82 PathProgramCache]: Analyzing trace with hash 660120899, now seen corresponding path program 1 times [2018-12-09 19:26:52,780 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:52,780 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:52,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:52,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 19:26:52,830 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:26:52,837 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:52,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:26:52,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:26:52,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:26:52,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:52,837 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 4 states. [2018-12-09 19:26:52,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:52,850 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2018-12-09 19:26:52,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:26:52,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2018-12-09 19:26:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:52,851 INFO L225 Difference]: With dead ends: 122 [2018-12-09 19:26:52,851 INFO L226 Difference]: Without dead ends: 95 [2018-12-09 19:26:52,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:52,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-12-09 19:26:52,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2018-12-09 19:26:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-09 19:26:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2018-12-09 19:26:52,857 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 62 [2018-12-09 19:26:52,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:52,857 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2018-12-09 19:26:52,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:26:52,857 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2018-12-09 19:26:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 19:26:52,858 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:52,858 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:52,858 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:52,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:52,859 INFO L82 PathProgramCache]: Analyzing trace with hash -931228901, now seen corresponding path program 1 times [2018-12-09 19:26:52,859 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:52,859 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:52,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:52,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-12-09 19:26:53,048 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:26:53,056 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:53,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-12-09 19:26:53,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 19:26:53,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 19:26:53,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-12-09 19:26:53,057 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 11 states. [2018-12-09 19:26:53,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:53,960 INFO L93 Difference]: Finished difference Result 124 states and 162 transitions. [2018-12-09 19:26:53,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 19:26:53,961 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-12-09 19:26:53,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:53,962 INFO L225 Difference]: With dead ends: 124 [2018-12-09 19:26:53,962 INFO L226 Difference]: Without dead ends: 122 [2018-12-09 19:26:53,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-12-09 19:26:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-12-09 19:26:53,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2018-12-09 19:26:53,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-09 19:26:53,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 128 transitions. [2018-12-09 19:26:53,968 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 128 transitions. Word has length 56 [2018-12-09 19:26:53,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:53,969 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 128 transitions. [2018-12-09 19:26:53,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 19:26:53,969 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 128 transitions. [2018-12-09 19:26:53,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 19:26:53,970 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:53,970 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:53,970 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:53,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:53,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1062915805, now seen corresponding path program 1 times [2018-12-09 19:26:53,970 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:53,970 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:53,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:54,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 19:26:54,144 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:26:54,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:26:54,300 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:26:54,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:54,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 19:26:54,329 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:26:54,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 19:26:54,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-09 19:26:54,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 19:26:54,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 19:26:54,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-09 19:26:54,506 INFO L87 Difference]: Start difference. First operand 97 states and 128 transitions. Second operand 8 states. [2018-12-09 19:26:55,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:55,044 INFO L93 Difference]: Finished difference Result 136 states and 173 transitions. [2018-12-09 19:26:55,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 19:26:55,044 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2018-12-09 19:26:55,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:55,045 INFO L225 Difference]: With dead ends: 136 [2018-12-09 19:26:55,045 INFO L226 Difference]: Without dead ends: 116 [2018-12-09 19:26:55,046 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-12-09 19:26:55,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-12-09 19:26:55,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 100. [2018-12-09 19:26:55,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-12-09 19:26:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 131 transitions. [2018-12-09 19:26:55,053 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 131 transitions. Word has length 56 [2018-12-09 19:26:55,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:55,053 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 131 transitions. [2018-12-09 19:26:55,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 19:26:55,053 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 131 transitions. [2018-12-09 19:26:55,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-09 19:26:55,054 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:55,054 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:55,054 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:55,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:55,054 INFO L82 PathProgramCache]: Analyzing trace with hash -996587585, now seen corresponding path program 1 times [2018-12-09 19:26:55,054 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:55,055 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:55,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:55,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-09 19:26:55,257 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:26:55,265 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:55,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-12-09 19:26:55,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 19:26:55,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 19:26:55,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-09 19:26:55,266 INFO L87 Difference]: Start difference. First operand 100 states and 131 transitions. Second operand 9 states. [2018-12-09 19:26:55,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:55,884 INFO L93 Difference]: Finished difference Result 148 states and 189 transitions. [2018-12-09 19:26:55,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 19:26:55,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2018-12-09 19:26:55,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:55,886 INFO L225 Difference]: With dead ends: 148 [2018-12-09 19:26:55,886 INFO L226 Difference]: Without dead ends: 124 [2018-12-09 19:26:55,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-12-09 19:26:55,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-12-09 19:26:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 97. [2018-12-09 19:26:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-09 19:26:55,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2018-12-09 19:26:55,892 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 63 [2018-12-09 19:26:55,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:55,893 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2018-12-09 19:26:55,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 19:26:55,893 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2018-12-09 19:26:55,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 19:26:55,893 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:55,894 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:55,894 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:55,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:55,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1505315820, now seen corresponding path program 1 times [2018-12-09 19:26:55,894 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:55,894 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:55,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:55,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 19:26:55,939 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:26:55,946 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:26:55,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:26:55,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:26:55,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:26:55,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:55,947 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 4 states. [2018-12-09 19:26:55,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:26:55,960 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2018-12-09 19:26:55,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:26:55,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-12-09 19:26:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:26:55,961 INFO L225 Difference]: With dead ends: 127 [2018-12-09 19:26:55,961 INFO L226 Difference]: Without dead ends: 100 [2018-12-09 19:26:55,961 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:26:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-12-09 19:26:55,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2018-12-09 19:26:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-09 19:26:55,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2018-12-09 19:26:55,967 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 56 [2018-12-09 19:26:55,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:26:55,968 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2018-12-09 19:26:55,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:26:55,968 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2018-12-09 19:26:55,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-09 19:26:55,968 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:26:55,969 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:26:55,969 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:26:55,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:26:55,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1712579960, now seen corresponding path program 1 times [2018-12-09 19:26:55,969 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:26:55,969 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 22 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with mathsat -unsat_core_generation=3 [2018-12-09 19:26:55,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:56,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-09 19:26:56,430 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:26:56,604 WARN L180 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-09 19:26:57,305 WARN L180 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-09 19:26:57,481 WARN L180 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-09 19:26:57,583 WARN L180 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-09 19:26:57,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:26:57,701 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:26:57,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:26:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:26:57,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:26:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 19:26:57,884 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:26:58,117 WARN L180 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-09 19:26:58,657 WARN L180 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-09 19:26:58,893 WARN L180 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-09 19:26:58,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 19:26:58,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 17 [2018-12-09 19:26:58,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 19:26:58,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 19:26:58,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-12-09 19:26:58,998 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand 17 states. [2018-12-09 19:27:00,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:00,599 INFO L93 Difference]: Finished difference Result 154 states and 201 transitions. [2018-12-09 19:27:00,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-09 19:27:00,600 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-12-09 19:27:00,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:00,601 INFO L225 Difference]: With dead ends: 154 [2018-12-09 19:27:00,601 INFO L226 Difference]: Without dead ends: 127 [2018-12-09 19:27:00,601 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2018-12-09 19:27:00,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-12-09 19:27:00,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2018-12-09 19:27:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-12-09 19:27:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2018-12-09 19:27:00,608 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 63 [2018-12-09 19:27:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:00,608 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2018-12-09 19:27:00,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 19:27:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2018-12-09 19:27:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-12-09 19:27:00,609 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:00,609 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:00,609 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:27:00,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:00,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1665293146, now seen corresponding path program 1 times [2018-12-09 19:27:00,610 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:27:00,610 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2018-12-09 19:27:00,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:00,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 19:27:00,722 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:27:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-09 19:27:00,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:27:00,922 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:27:00,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:00,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-09 19:27:00,990 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:27:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-09 19:27:01,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 19:27:01,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 12] total 17 [2018-12-09 19:27:01,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 19:27:01,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 19:27:01,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-12-09 19:27:01,154 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 17 states. [2018-12-09 19:27:01,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:01,598 INFO L93 Difference]: Finished difference Result 149 states and 192 transitions. [2018-12-09 19:27:01,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 19:27:01,598 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2018-12-09 19:27:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:01,599 INFO L225 Difference]: With dead ends: 149 [2018-12-09 19:27:01,599 INFO L226 Difference]: Without dead ends: 119 [2018-12-09 19:27:01,599 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2018-12-09 19:27:01,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-12-09 19:27:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2018-12-09 19:27:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-12-09 19:27:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2018-12-09 19:27:01,605 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 64 [2018-12-09 19:27:01,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:01,605 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2018-12-09 19:27:01,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 19:27:01,605 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2018-12-09 19:27:01,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-09 19:27:01,605 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:01,605 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:01,605 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:27:01,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:01,606 INFO L82 PathProgramCache]: Analyzing trace with hash 2049769800, now seen corresponding path program 1 times [2018-12-09 19:27:01,606 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:27:01,606 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 26 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with mathsat -unsat_core_generation=3 [2018-12-09 19:27:01,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:01,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 19:27:01,794 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:27:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 19:27:02,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:27:02,135 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:27:02,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:02,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-12-09 19:27:02,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:27:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 19:27:02,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 19:27:02,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16, 14] total 27 [2018-12-09 19:27:02,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-09 19:27:02,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-09 19:27:02,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2018-12-09 19:27:02,756 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand 27 states. [2018-12-09 19:27:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:03,944 INFO L93 Difference]: Finished difference Result 154 states and 199 transitions. [2018-12-09 19:27:03,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-09 19:27:03,944 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 57 [2018-12-09 19:27:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:03,945 INFO L225 Difference]: With dead ends: 154 [2018-12-09 19:27:03,945 INFO L226 Difference]: Without dead ends: 152 [2018-12-09 19:27:03,945 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 198 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2018-12-09 19:27:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-12-09 19:27:03,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 111. [2018-12-09 19:27:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-12-09 19:27:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 148 transitions. [2018-12-09 19:27:03,951 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 148 transitions. Word has length 57 [2018-12-09 19:27:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:03,951 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 148 transitions. [2018-12-09 19:27:03,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-09 19:27:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 148 transitions. [2018-12-09 19:27:03,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-09 19:27:03,952 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:03,952 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:03,952 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:27:03,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:03,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1177119311, now seen corresponding path program 1 times [2018-12-09 19:27:03,952 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:27:03,952 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 28 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with mathsat -unsat_core_generation=3 [2018-12-09 19:27:03,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:03,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-09 19:27:04,056 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:27:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-12-09 19:27:04,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:27:04,246 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:27:04,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:04,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-09 19:27:04,277 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:27:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-12-09 19:27:04,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 19:27:04,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9] total 13 [2018-12-09 19:27:04,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 19:27:04,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 19:27:04,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-12-09 19:27:04,408 INFO L87 Difference]: Start difference. First operand 111 states and 148 transitions. Second operand 13 states. [2018-12-09 19:27:04,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:04,706 INFO L93 Difference]: Finished difference Result 195 states and 246 transitions. [2018-12-09 19:27:04,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 19:27:04,707 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2018-12-09 19:27:04,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:04,707 INFO L225 Difference]: With dead ends: 195 [2018-12-09 19:27:04,707 INFO L226 Difference]: Without dead ends: 113 [2018-12-09 19:27:04,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2018-12-09 19:27:04,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-12-09 19:27:04,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 91. [2018-12-09 19:27:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-09 19:27:04,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2018-12-09 19:27:04,713 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 69 [2018-12-09 19:27:04,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:04,713 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2018-12-09 19:27:04,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 19:27:04,713 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2018-12-09 19:27:04,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-09 19:27:04,714 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:04,714 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:04,714 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:27:04,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:04,714 INFO L82 PathProgramCache]: Analyzing trace with hash 685789633, now seen corresponding path program 1 times [2018-12-09 19:27:04,715 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:27:04,715 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 30 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with mathsat -unsat_core_generation=3 [2018-12-09 19:27:04,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:04,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 19:27:04,762 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:27:04,769 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:27:04,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:27:04,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:27:04,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:27:04,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:27:04,769 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 4 states. [2018-12-09 19:27:04,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:04,779 INFO L93 Difference]: Finished difference Result 122 states and 153 transitions. [2018-12-09 19:27:04,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:27:04,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-12-09 19:27:04,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:04,780 INFO L225 Difference]: With dead ends: 122 [2018-12-09 19:27:04,780 INFO L226 Difference]: Without dead ends: 93 [2018-12-09 19:27:04,780 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:27:04,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-09 19:27:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-12-09 19:27:04,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-09 19:27:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2018-12-09 19:27:04,788 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 57 [2018-12-09 19:27:04,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:04,789 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2018-12-09 19:27:04,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:27:04,789 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2018-12-09 19:27:04,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-09 19:27:04,790 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:04,790 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:04,790 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:27:04,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:04,790 INFO L82 PathProgramCache]: Analyzing trace with hash 276965408, now seen corresponding path program 1 times [2018-12-09 19:27:04,790 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:27:04,791 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 31 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with mathsat -unsat_core_generation=3 [2018-12-09 19:27:04,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:04,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-09 19:27:05,283 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:27:05,290 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:27:05,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2018-12-09 19:27:05,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-09 19:27:05,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-09 19:27:05,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-12-09 19:27:05,291 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 15 states. [2018-12-09 19:27:06,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:06,641 INFO L93 Difference]: Finished difference Result 130 states and 163 transitions. [2018-12-09 19:27:06,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-09 19:27:06,641 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-12-09 19:27:06,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:06,642 INFO L225 Difference]: With dead ends: 130 [2018-12-09 19:27:06,642 INFO L226 Difference]: Without dead ends: 96 [2018-12-09 19:27:06,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2018-12-09 19:27:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-12-09 19:27:06,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2018-12-09 19:27:06,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-09 19:27:06,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2018-12-09 19:27:06,646 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 57 [2018-12-09 19:27:06,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:06,646 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2018-12-09 19:27:06,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-09 19:27:06,646 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2018-12-09 19:27:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-09 19:27:06,647 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:06,647 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:06,647 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:27:06,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:06,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1068698790, now seen corresponding path program 1 times [2018-12-09 19:27:06,647 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:27:06,647 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 32 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with mathsat -unsat_core_generation=3 [2018-12-09 19:27:06,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:06,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 19:27:06,746 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:27:06,873 WARN L180 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-12-09 19:27:07,036 WARN L180 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-12-09 19:27:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-12-09 19:27:07,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:27:07,165 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:27:07,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:07,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 19:27:07,233 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:27:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-12-09 19:27:07,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 19:27:07,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 9] total 17 [2018-12-09 19:27:07,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 19:27:07,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 19:27:07,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-12-09 19:27:07,434 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 17 states. [2018-12-09 19:27:07,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:07,763 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2018-12-09 19:27:07,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-09 19:27:07,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2018-12-09 19:27:07,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:07,764 INFO L225 Difference]: With dead ends: 92 [2018-12-09 19:27:07,764 INFO L226 Difference]: Without dead ends: 60 [2018-12-09 19:27:07,764 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2018-12-09 19:27:07,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-09 19:27:07,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2018-12-09 19:27:07,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-09 19:27:07,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2018-12-09 19:27:07,767 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 61 [2018-12-09 19:27:07,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:07,767 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2018-12-09 19:27:07,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 19:27:07,767 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2018-12-09 19:27:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-12-09 19:27:07,767 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:07,767 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:07,768 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:27:07,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:07,768 INFO L82 PathProgramCache]: Analyzing trace with hash -820099601, now seen corresponding path program 1 times [2018-12-09 19:27:07,768 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:27:07,768 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 34 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with mathsat -unsat_core_generation=3 [2018-12-09 19:27:07,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:07,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 19:27:07,968 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:27:07,975 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:27:07,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-09 19:27:07,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 19:27:07,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 19:27:07,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-09 19:27:07,975 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 12 states. [2018-12-09 19:27:08,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:08,600 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2018-12-09 19:27:08,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 19:27:08,601 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2018-12-09 19:27:08,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:08,601 INFO L225 Difference]: With dead ends: 79 [2018-12-09 19:27:08,601 INFO L226 Difference]: Without dead ends: 58 [2018-12-09 19:27:08,602 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-09 19:27:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-09 19:27:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-12-09 19:27:08,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-09 19:27:08,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-12-09 19:27:08,604 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 70 [2018-12-09 19:27:08,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:08,604 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-12-09 19:27:08,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 19:27:08,604 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-12-09 19:27:08,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-12-09 19:27:08,604 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:08,605 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:08,605 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:27:08,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:08,605 INFO L82 PathProgramCache]: Analyzing trace with hash -429306586, now seen corresponding path program 1 times [2018-12-09 19:27:08,605 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:27:08,605 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 35 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with mathsat -unsat_core_generation=3 [2018-12-09 19:27:08,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:08,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 19:27:08,854 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:27:08,865 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:27:08,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-09 19:27:08,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 19:27:08,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 19:27:08,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-09 19:27:08,866 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 12 states. [2018-12-09 19:27:09,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:09,541 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2018-12-09 19:27:09,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 19:27:09,541 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2018-12-09 19:27:09,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:09,542 INFO L225 Difference]: With dead ends: 81 [2018-12-09 19:27:09,542 INFO L226 Difference]: Without dead ends: 60 [2018-12-09 19:27:09,542 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-09 19:27:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-09 19:27:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2018-12-09 19:27:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-09 19:27:09,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2018-12-09 19:27:09,545 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 71 [2018-12-09 19:27:09,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:09,545 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2018-12-09 19:27:09,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 19:27:09,545 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2018-12-09 19:27:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-12-09 19:27:09,545 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:09,546 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:09,546 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:27:09,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:09,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1994702002, now seen corresponding path program 1 times [2018-12-09 19:27:09,546 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:27:09,546 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 36 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with mathsat -unsat_core_generation=3 [2018-12-09 19:27:09,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:09,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-09 19:27:09,722 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:27:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-09 19:27:10,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:27:10,279 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:27:10,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:10,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-09 19:27:10,331 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:27:10,742 WARN L180 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-12-09 19:27:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-09 19:27:10,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 19:27:10,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 17 [2018-12-09 19:27:10,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 19:27:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 19:27:10,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-12-09 19:27:10,795 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 17 states. [2018-12-09 19:27:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:11,466 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2018-12-09 19:27:11,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 19:27:11,467 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-12-09 19:27:11,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:11,467 INFO L225 Difference]: With dead ends: 83 [2018-12-09 19:27:11,467 INFO L226 Difference]: Without dead ends: 68 [2018-12-09 19:27:11,468 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 262 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2018-12-09 19:27:11,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-09 19:27:11,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2018-12-09 19:27:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-09 19:27:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-12-09 19:27:11,470 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 71 [2018-12-09 19:27:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:11,471 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-12-09 19:27:11,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 19:27:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-12-09 19:27:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-12-09 19:27:11,471 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:11,471 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:11,471 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:27:11,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:11,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1572781779, now seen corresponding path program 1 times [2018-12-09 19:27:11,471 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:27:11,471 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 38 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with mathsat -unsat_core_generation=3 [2018-12-09 19:27:11,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:11,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 19:27:11,741 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:27:11,748 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:27:11,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-09 19:27:11,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 19:27:11,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 19:27:11,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-09 19:27:11,748 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 12 states. [2018-12-09 19:27:12,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:12,585 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2018-12-09 19:27:12,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 19:27:12,586 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2018-12-09 19:27:12,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:12,586 INFO L225 Difference]: With dead ends: 85 [2018-12-09 19:27:12,586 INFO L226 Difference]: Without dead ends: 64 [2018-12-09 19:27:12,587 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-09 19:27:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-09 19:27:12,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2018-12-09 19:27:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-09 19:27:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2018-12-09 19:27:12,589 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 72 [2018-12-09 19:27:12,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:12,589 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-12-09 19:27:12,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 19:27:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2018-12-09 19:27:12,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-12-09 19:27:12,590 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:12,590 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:12,590 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:27:12,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:12,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1981385, now seen corresponding path program 1 times [2018-12-09 19:27:12,590 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:27:12,590 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 39 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with mathsat -unsat_core_generation=3 [2018-12-09 19:27:12,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:12,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-12-09 19:27:12,755 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:27:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-12-09 19:27:13,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:27:13,064 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:27:13,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:13,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-09 19:27:13,161 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:27:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-12-09 19:27:13,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 19:27:13,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12, 13] total 22 [2018-12-09 19:27:13,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-09 19:27:13,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-09 19:27:13,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2018-12-09 19:27:13,385 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 22 states. [2018-12-09 19:27:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:13,817 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2018-12-09 19:27:13,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 19:27:13,817 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2018-12-09 19:27:13,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:13,818 INFO L225 Difference]: With dead ends: 78 [2018-12-09 19:27:13,818 INFO L226 Difference]: Without dead ends: 63 [2018-12-09 19:27:13,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2018-12-09 19:27:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-09 19:27:13,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2018-12-09 19:27:13,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-09 19:27:13,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2018-12-09 19:27:13,821 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 72 [2018-12-09 19:27:13,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:13,821 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2018-12-09 19:27:13,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-09 19:27:13,821 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2018-12-09 19:27:13,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-09 19:27:13,822 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:13,822 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:13,822 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:27:13,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:13,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1985418442, now seen corresponding path program 1 times [2018-12-09 19:27:13,822 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:27:13,822 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 41 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with mathsat -unsat_core_generation=3 [2018-12-09 19:27:13,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:13,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 19:27:14,028 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:27:14,036 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:27:14,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-09 19:27:14,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 19:27:14,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 19:27:14,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-09 19:27:14,037 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 12 states. [2018-12-09 19:27:14,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:14,654 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2018-12-09 19:27:14,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 19:27:14,654 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2018-12-09 19:27:14,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:14,655 INFO L225 Difference]: With dead ends: 78 [2018-12-09 19:27:14,655 INFO L226 Difference]: Without dead ends: 57 [2018-12-09 19:27:14,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-09 19:27:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-09 19:27:14,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2018-12-09 19:27:14,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-09 19:27:14,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2018-12-09 19:27:14,658 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 73 [2018-12-09 19:27:14,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:14,659 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2018-12-09 19:27:14,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 19:27:14,659 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2018-12-09 19:27:14,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-09 19:27:14,659 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:27:14,659 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:27:14,659 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:27:14,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:27:14,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1616447157, now seen corresponding path program 1 times [2018-12-09 19:27:14,660 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 19:27:14,660 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/mathsat Starting monitored process 42 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with mathsat -unsat_core_generation=3 [2018-12-09 19:27:14,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:27:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:27:14,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:27:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-09 19:27:14,715 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 19:27:14,722 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:27:14,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:27:14,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:27:14,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:27:14,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:27:14,723 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 4 states. [2018-12-09 19:27:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:27:14,731 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-12-09 19:27:14,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:27:14,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2018-12-09 19:27:14,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:27:14,732 INFO L225 Difference]: With dead ends: 58 [2018-12-09 19:27:14,732 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 19:27:14,732 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:27:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 19:27:14,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 19:27:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 19:27:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 19:27:14,733 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2018-12-09 19:27:14,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:27:14,733 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 19:27:14,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:27:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 19:27:14,734 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 19:27:14,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 19:27:15,040 INFO L448 ceAbstractionStarter]: For program point isnan_floatFINAL(line 57) no Hoare annotation was computed. [2018-12-09 19:27:15,041 INFO L451 ceAbstractionStarter]: At program point isnan_floatENTRY(line 57) the Hoare annotation is: true [2018-12-09 19:27:15,041 INFO L448 ceAbstractionStarter]: For program point isnan_floatEXIT(line 57) no Hoare annotation was computed. [2018-12-09 19:27:15,041 INFO L451 ceAbstractionStarter]: At program point fmin_floatENTRY(lines 35 42) the Hoare annotation is: true [2018-12-09 19:27:15,041 INFO L448 ceAbstractionStarter]: For program point fmin_floatEXIT(lines 35 42) no Hoare annotation was computed. [2018-12-09 19:27:15,041 INFO L448 ceAbstractionStarter]: For program point fmin_floatFINAL(lines 35 42) no Hoare annotation was computed. [2018-12-09 19:27:15,041 INFO L448 ceAbstractionStarter]: For program point L41(line 41) no Hoare annotation was computed. [2018-12-09 19:27:15,041 INFO L448 ceAbstractionStarter]: For program point L41-2(line 41) no Hoare annotation was computed. [2018-12-09 19:27:15,041 INFO L444 ceAbstractionStarter]: At program point L38(line 38) the Hoare annotation is: (and (= fmin_float_~x |fmin_float_#in~x|) (= fmin_float_~y |fmin_float_#in~y|)) [2018-12-09 19:27:15,041 INFO L448 ceAbstractionStarter]: For program point L38-1(lines 38 39) no Hoare annotation was computed. [2018-12-09 19:27:15,041 INFO L444 ceAbstractionStarter]: At program point L36(line 36) the Hoare annotation is: (and (= fmin_float_~x |fmin_float_#in~x|) (= fmin_float_~y |fmin_float_#in~y|)) [2018-12-09 19:27:15,041 INFO L448 ceAbstractionStarter]: For program point L36-1(lines 36 37) no Hoare annotation was computed. [2018-12-09 19:27:15,041 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-12-09 19:27:15,042 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-12-09 19:27:15,042 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 19:27:15,042 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 19:27:15,042 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 19:27:15,042 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 19:27:15,042 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 19:27:15,042 INFO L444 ceAbstractionStarter]: At program point L68-3(line 68) the Hoare annotation is: (and (= (_ bv1 32) |main_#t~ret9|) |main_#t~short11| (not (fp.eq main_~x~0 main_~x~0))) [2018-12-09 19:27:15,042 INFO L448 ceAbstractionStarter]: For program point L68-4(line 68) no Hoare annotation was computed. [2018-12-09 19:27:15,042 INFO L448 ceAbstractionStarter]: For program point L68-6(line 68) no Hoare annotation was computed. [2018-12-09 19:27:15,042 INFO L448 ceAbstractionStarter]: For program point L68-7(lines 68 69) no Hoare annotation was computed. [2018-12-09 19:27:15,042 INFO L448 ceAbstractionStarter]: For program point L68-9(lines 68 84) no Hoare annotation was computed. [2018-12-09 19:27:15,042 INFO L448 ceAbstractionStarter]: For program point L68-11(lines 68 84) no Hoare annotation was computed. [2018-12-09 19:27:15,042 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 59 87) no Hoare annotation was computed. [2018-12-09 19:27:15,042 INFO L448 ceAbstractionStarter]: For program point L81(line 81) no Hoare annotation was computed. [2018-12-09 19:27:15,042 INFO L444 ceAbstractionStarter]: At program point L69(line 69) the Hoare annotation is: (let ((.cse0 (not |main_#t~short11|)) (.cse2 (fp.eq main_~x~0 main_~x~0)) (.cse1 (not |main_#t~short15|))) (or (and .cse0 .cse1 (= (_ bv1 32) |main_#t~ret9|) (= (bvadd |main_#t~ret10| (_ bv4294967295 32)) (_ bv0 32)) (not (fp.eq main_~y~0 main_~y~0)) (not .cse2)) (and .cse0 .cse2 .cse1 (= (_ bv0 32) |main_#t~ret9|)))) [2018-12-09 19:27:15,043 INFO L448 ceAbstractionStarter]: For program point L69-1(line 69) no Hoare annotation was computed. [2018-12-09 19:27:15,043 INFO L448 ceAbstractionStarter]: For program point L69-2(line 69) no Hoare annotation was computed. [2018-12-09 19:27:15,043 INFO L444 ceAbstractionStarter]: At program point L69-3(line 69) the Hoare annotation is: (and |main_#t~short14| (not |main_#t~short11|) (fp.eq main_~x~0 main_~x~0) (not |main_#t~short15|) (= |main_#t~ret12| (_ bv0 32)) (= (_ bv0 32) |main_#t~ret9|)) [2018-12-09 19:27:15,043 INFO L448 ceAbstractionStarter]: For program point L69-4(line 69) no Hoare annotation was computed. [2018-12-09 19:27:15,043 INFO L448 ceAbstractionStarter]: For program point L69-6(line 69) no Hoare annotation was computed. [2018-12-09 19:27:15,043 INFO L448 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 81) no Hoare annotation was computed. [2018-12-09 19:27:15,043 INFO L444 ceAbstractionStarter]: At program point L74(line 74) the Hoare annotation is: (let ((.cse1 (fp.eq main_~y~0 main_~y~0)) (.cse0 (fp.eq main_~x~0 main_~x~0))) (or (and (= main_~x~0 main_~res~0) .cse0 (not .cse1)) (and (= main_~y~0 main_~res~0) .cse1 (not .cse0)))) [2018-12-09 19:27:15,043 INFO L448 ceAbstractionStarter]: For program point L74-1(line 74) no Hoare annotation was computed. [2018-12-09 19:27:15,043 INFO L448 ceAbstractionStarter]: For program point L74-2(line 74) no Hoare annotation was computed. [2018-12-09 19:27:15,043 INFO L444 ceAbstractionStarter]: At program point L74-3(line 74) the Hoare annotation is: (and (= main_~y~0 main_~res~0) |main_#t~short19| (= (bvadd |main_#t~ret17| (_ bv4294967295 32)) (_ bv0 32)) (fp.eq main_~y~0 main_~y~0) (not (fp.eq main_~x~0 main_~x~0))) [2018-12-09 19:27:15,043 INFO L448 ceAbstractionStarter]: For program point L74-4(line 74) no Hoare annotation was computed. [2018-12-09 19:27:15,043 INFO L448 ceAbstractionStarter]: For program point L74-6(lines 74 77) no Hoare annotation was computed. [2018-12-09 19:27:15,043 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 75) no Hoare annotation was computed. [2018-12-09 19:27:15,044 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 59 87) no Hoare annotation was computed. [2018-12-09 19:27:15,044 INFO L448 ceAbstractionStarter]: For program point L75(line 75) no Hoare annotation was computed. [2018-12-09 19:27:15,044 INFO L444 ceAbstractionStarter]: At program point L71(line 71) the Hoare annotation is: (let ((.cse1 (fp.eq main_~y~0 main_~y~0)) (.cse0 (fp.eq main_~x~0 main_~x~0))) (or (and .cse0 (not .cse1)) (and .cse1 (not .cse0)))) [2018-12-09 19:27:15,044 INFO L448 ceAbstractionStarter]: For program point L71-1(line 71) no Hoare annotation was computed. [2018-12-09 19:27:15,044 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 59 87) the Hoare annotation is: true [2018-12-09 19:27:15,044 INFO L444 ceAbstractionStarter]: At program point L80(line 80) the Hoare annotation is: (or (and (= main_~x~0 main_~res~0) (not (fp.eq main_~y~0 main_~y~0))) (not (fp.eq main_~x~0 main_~x~0))) [2018-12-09 19:27:15,044 INFO L448 ceAbstractionStarter]: For program point L80-1(line 80) no Hoare annotation was computed. [2018-12-09 19:27:15,044 INFO L448 ceAbstractionStarter]: For program point L80-2(line 80) no Hoare annotation was computed. [2018-12-09 19:27:15,044 INFO L444 ceAbstractionStarter]: At program point L80-3(line 80) the Hoare annotation is: (and (= main_~x~0 main_~res~0) (fp.eq main_~x~0 main_~x~0) |main_#t~short22| (not (fp.eq main_~y~0 main_~y~0))) [2018-12-09 19:27:15,044 INFO L448 ceAbstractionStarter]: For program point L80-4(line 80) no Hoare annotation was computed. [2018-12-09 19:27:15,044 INFO L448 ceAbstractionStarter]: For program point L80-6(lines 80 83) no Hoare annotation was computed. [2018-12-09 19:27:15,044 INFO L451 ceAbstractionStarter]: At program point L68(line 68) the Hoare annotation is: true [2018-12-09 19:27:15,044 INFO L448 ceAbstractionStarter]: For program point L68-1(line 68) no Hoare annotation was computed. [2018-12-09 19:27:15,044 INFO L448 ceAbstractionStarter]: For program point L68-2(line 68) no Hoare annotation was computed. [2018-12-09 19:27:15,045 INFO L448 ceAbstractionStarter]: For program point L29(lines 29 32) no Hoare annotation was computed. [2018-12-09 19:27:15,045 INFO L448 ceAbstractionStarter]: For program point __fpclassify_floatFINAL(lines 12 33) no Hoare annotation was computed. [2018-12-09 19:27:15,045 INFO L448 ceAbstractionStarter]: For program point L23(lines 23 32) no Hoare annotation was computed. [2018-12-09 19:27:15,045 INFO L448 ceAbstractionStarter]: For program point L15-1(lines 15 19) no Hoare annotation was computed. [2018-12-09 19:27:15,045 INFO L444 ceAbstractionStarter]: At program point L15-2(lines 15 19) the Hoare annotation is: (= __fpclassify_float_~x |__fpclassify_float_#in~x|) [2018-12-09 19:27:15,045 INFO L448 ceAbstractionStarter]: For program point L15-3(lines 12 33) no Hoare annotation was computed. [2018-12-09 19:27:15,045 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 32) no Hoare annotation was computed. [2018-12-09 19:27:15,045 INFO L451 ceAbstractionStarter]: At program point __fpclassify_floatENTRY(lines 12 33) the Hoare annotation is: true [2018-12-09 19:27:15,045 INFO L448 ceAbstractionStarter]: For program point __fpclassify_floatEXIT(lines 12 33) no Hoare annotation was computed. [2018-12-09 19:27:15,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:27:15 BoogieIcfgContainer [2018-12-09 19:27:15,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 19:27:15,056 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 19:27:15,056 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 19:27:15,056 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 19:27:15,056 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:26:46" (3/4) ... [2018-12-09 19:27:15,059 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 19:27:15,065 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2018-12-09 19:27:15,065 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fmin_float [2018-12-09 19:27:15,065 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 19:27:15,066 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 19:27:15,066 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2018-12-09 19:27:15,070 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2018-12-09 19:27:15,070 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-12-09 19:27:15,070 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 19:27:15,087 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: x == \old(x) [2018-12-09 19:27:15,101 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_283b6ff2-84d5-49fc-8790-241298780d15/bin-2019/utaipan/witness.graphml [2018-12-09 19:27:15,101 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 19:27:15,102 INFO L168 Benchmark]: Toolchain (without parser) took 29068.55 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 378.0 MB). Free memory was 944.7 MB in the beginning and 1.3 GB in the end (delta: -392.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:27:15,102 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:27:15,103 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.24 ms. Allocated memory is still 1.0 GB. Free memory was 944.7 MB in the beginning and 934.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 19:27:15,103 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.46 ms. Allocated memory is still 1.0 GB. Free memory was 934.0 MB in the beginning and 928.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-09 19:27:15,103 INFO L168 Benchmark]: Boogie Preprocessor took 26.28 ms. Allocated memory is still 1.0 GB. Free memory is still 928.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:27:15,103 INFO L168 Benchmark]: RCFGBuilder took 253.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 928.6 MB in the beginning and 1.1 GB in the end (delta: -180.6 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-12-09 19:27:15,103 INFO L168 Benchmark]: TraceAbstraction took 28544.84 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 238.6 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -238.9 MB). Peak memory consumption was 537.7 MB. Max. memory is 11.5 GB. [2018-12-09 19:27:15,104 INFO L168 Benchmark]: Witness Printer took 45.48 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 11.5 GB. [2018-12-09 19:27:15,105 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 178.24 ms. Allocated memory is still 1.0 GB. Free memory was 944.7 MB in the beginning and 934.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.46 ms. Allocated memory is still 1.0 GB. Free memory was 934.0 MB in the beginning and 928.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.28 ms. Allocated memory is still 1.0 GB. Free memory is still 928.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 253.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 928.6 MB in the beginning and 1.1 GB in the end (delta: -180.6 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 28544.84 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 238.6 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -238.9 MB). Peak memory consumption was 537.7 MB. Max. memory is 11.5 GB. * Witness Printer took 45.48 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 75]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 81]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: x == \old(x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 2 error locations. SAFE Result, 28.5s OverallTime, 30 OverallIterations, 6 TraceHistogramMax, 14.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 2056 SDtfs, 1247 SDslu, 12377 SDs, 0 SdLazy, 6148 SolverSat, 389 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3558 GetRequests, 3160 SyntacticMatches, 16 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 30 MinimizatonAttempts, 320 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 168 PreInvPairs, 193 NumberOfFragments, 164 HoareAnnotationTreeSize, 168 FomulaSimplifications, 23315 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 19 FomulaSimplificationsInter, 55 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 2393 NumberOfCodeBlocks, 2393 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 3324 ConstructedInterpolants, 35 QuantifiedInterpolants, 632089 SizeOfPredicates, 210 NumberOfNonLiveVariables, 5134 ConjunctsInSsa, 449 ConjunctsInUnsatCore, 57 InterpolantComputations, 22 PerfectInterpolantSequences, 1658/1882 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...