./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_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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 08:10:41,482 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 08:10:41,483 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 08:10:41,489 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 08:10:41,489 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 08:10:41,489 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 08:10:41,490 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 08:10:41,491 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 08:10:41,492 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 08:10:41,492 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 08:10:41,492 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 08:10:41,493 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 08:10:41,493 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 08:10:41,494 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 08:10:41,494 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 08:10:41,494 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 08:10:41,495 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 08:10:41,496 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 08:10:41,497 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 08:10:41,497 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 08:10:41,498 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 08:10:41,499 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 08:10:41,500 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 08:10:41,500 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 08:10:41,500 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 08:10:41,501 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 08:10:41,501 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 08:10:41,502 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 08:10:41,502 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 08:10:41,503 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 08:10:41,503 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 08:10:41,503 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 08:10:41,503 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 08:10:41,503 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 08:10:41,504 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 08:10:41,504 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 08:10:41,504 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-09 08:10:41,512 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 08:10:41,512 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 08:10:41,513 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 08:10:41,513 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 08:10:41,513 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 08:10:41,514 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 08:10:41,514 INFO L133 SettingsManager]: * Use SBE=true [2018-12-09 08:10:41,514 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 08:10:41,514 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 08:10:41,514 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 08:10:41,514 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 08:10:41,515 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 08:10:41,515 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 08:10:41,515 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 08:10:41,515 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 08:10:41,515 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 08:10:41,515 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 08:10:41,515 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 08:10:41,516 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 08:10:41,516 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 08:10:41,516 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 08:10:41,516 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 08:10:41,516 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 08:10:41,516 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 08:10:41,517 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 08:10:41,517 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 08:10:41,517 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 08:10:41,517 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-09 08:10:41,517 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 08:10:41,517 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 08:10:41,517 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_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65a8838494b0fa2a560742eb829642f08a5d8cc8 [2018-12-09 08:10:41,539 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 08:10:41,547 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 08:10:41,549 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 08:10:41,550 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 08:10:41,550 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 08:10:41,551 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-12-09 08:10:41,589 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/data/378bf5fbb/1e03b2ac037d4498ad6a592f2297c465/FLAGde6f793ea [2018-12-09 08:10:41,991 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 08:10:41,991 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-12-09 08:10:41,995 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/data/378bf5fbb/1e03b2ac037d4498ad6a592f2297c465/FLAGde6f793ea [2018-12-09 08:10:42,003 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/data/378bf5fbb/1e03b2ac037d4498ad6a592f2297c465 [2018-12-09 08:10:42,005 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 08:10:42,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 08:10:42,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 08:10:42,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 08:10:42,009 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 08:10:42,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:10:42" (1/1) ... [2018-12-09 08:10:42,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28bd7f12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:42, skipping insertion in model container [2018-12-09 08:10:42,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:10:42" (1/1) ... [2018-12-09 08:10:42,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 08:10:42,028 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 08:10:42,126 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 08:10:42,128 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 08:10:42,144 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 08:10:42,156 INFO L195 MainTranslator]: Completed translation [2018-12-09 08:10:42,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:42 WrapperNode [2018-12-09 08:10:42,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 08:10:42,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 08:10:42,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 08:10:42,157 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 08:10:42,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:42" (1/1) ... [2018-12-09 08:10:42,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:42" (1/1) ... [2018-12-09 08:10:42,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 08:10:42,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 08:10:42,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 08:10:42,202 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 08:10:42,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:42" (1/1) ... [2018-12-09 08:10:42,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:42" (1/1) ... [2018-12-09 08:10:42,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:42" (1/1) ... [2018-12-09 08:10:42,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:42" (1/1) ... [2018-12-09 08:10:42,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:42" (1/1) ... [2018-12-09 08:10:42,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:42" (1/1) ... [2018-12-09 08:10:42,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:42" (1/1) ... [2018-12-09 08:10:42,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 08:10:42,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 08:10:42,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 08:10:42,220 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 08:10:42,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 08:10:42,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 08:10:42,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 08:10:42,253 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-12-09 08:10:42,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-12-09 08:10:42,253 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-12-09 08:10:42,253 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-12-09 08:10:42,253 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2018-12-09 08:10:42,253 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2018-12-09 08:10:42,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 08:10:42,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 08:10:42,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2018-12-09 08:10:42,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 08:10:42,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 08:10:42,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 08:10:42,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 08:10:42,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 08:10:42,418 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 08:10:42,418 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-09 08:10:42,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:10:42 BoogieIcfgContainer [2018-12-09 08:10:42,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 08:10:42,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 08:10:42,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 08:10:42,421 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 08:10:42,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:10:42" (1/3) ... [2018-12-09 08:10:42,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd3f9d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:10:42, skipping insertion in model container [2018-12-09 08:10:42,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:42" (2/3) ... [2018-12-09 08:10:42,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd3f9d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:10:42, skipping insertion in model container [2018-12-09 08:10:42,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:10:42" (3/3) ... [2018-12-09 08:10:42,423 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231_true-unreach-call.c [2018-12-09 08:10:42,431 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 08:10:42,436 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-12-09 08:10:42,445 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-12-09 08:10:42,463 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 08:10:42,464 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 08:10:42,464 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 08:10:42,464 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 08:10:42,464 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 08:10:42,464 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 08:10:42,465 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 08:10:42,465 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 08:10:42,465 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 08:10:42,476 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2018-12-09 08:10:42,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-09 08:10:42,480 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:42,481 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 08:10:42,482 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:42,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:42,486 INFO L82 PathProgramCache]: Analyzing trace with hash -388929614, now seen corresponding path program 1 times [2018-12-09 08:10:42,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:10:42,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:10:42,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:10:42,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:42,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:10:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:42,573 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 08:10:42,574 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:42,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 08:10:42,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 08:10:42,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 08:10:42,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 08:10:42,585 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2018-12-09 08:10:42,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:42,601 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions. [2018-12-09 08:10:42,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 08:10:42,602 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 36 [2018-12-09 08:10:42,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:42,608 INFO L225 Difference]: With dead ends: 109 [2018-12-09 08:10:42,608 INFO L226 Difference]: Without dead ends: 61 [2018-12-09 08:10:42,610 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 08:10:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-09 08:10:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-12-09 08:10:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-09 08:10:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-12-09 08:10:42,636 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-12-09 08:10:42,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:42,637 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-12-09 08:10:42,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 08:10:42,637 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-12-09 08:10:42,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-09 08:10:42,638 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:42,638 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 08:10:42,639 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:42,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:42,639 INFO L82 PathProgramCache]: Analyzing trace with hash 689386628, now seen corresponding path program 1 times [2018-12-09 08:10:42,639 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:10:42,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:10:42,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:10:42,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:42,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:10:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:42,679 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 08:10:42,679 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:42,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 08:10:42,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 08:10:42,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 08:10:42,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 08:10:42,681 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-12-09 08:10:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:42,723 INFO L93 Difference]: Finished difference Result 112 states and 147 transitions. [2018-12-09 08:10:42,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 08:10:42,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-12-09 08:10:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:42,725 INFO L225 Difference]: With dead ends: 112 [2018-12-09 08:10:42,725 INFO L226 Difference]: Without dead ends: 70 [2018-12-09 08:10:42,725 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 08:10:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-09 08:10:42,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2018-12-09 08:10:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-09 08:10:42,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2018-12-09 08:10:42,732 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 37 [2018-12-09 08:10:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:42,732 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2018-12-09 08:10:42,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 08:10:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2018-12-09 08:10:42,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-09 08:10:42,733 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:42,733 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 08:10:42,733 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:42,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:42,733 INFO L82 PathProgramCache]: Analyzing trace with hash 644534487, now seen corresponding path program 1 times [2018-12-09 08:10:42,733 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:10:42,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:10:42,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:10:42,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:42,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:10:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:42,782 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 08:10:42,782 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:42,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 08:10:42,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 08:10:42,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 08:10:42,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 08:10:42,783 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 4 states. [2018-12-09 08:10:42,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:42,797 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2018-12-09 08:10:42,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 08:10:42,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-12-09 08:10:42,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:42,799 INFO L225 Difference]: With dead ends: 89 [2018-12-09 08:10:42,800 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 08:10:42,800 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 08:10:42,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 08:10:42,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-12-09 08:10:42,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-09 08:10:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-12-09 08:10:42,805 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 42 [2018-12-09 08:10:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:42,805 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-12-09 08:10:42,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 08:10:42,805 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-12-09 08:10:42,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-09 08:10:42,806 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:42,806 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 08:10:42,806 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:42,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:42,806 INFO L82 PathProgramCache]: Analyzing trace with hash 768889016, now seen corresponding path program 1 times [2018-12-09 08:10:42,806 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:10:42,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:10:42,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:10:42,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:42,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:10:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:42,850 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 08:10:42,850 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:42,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 08:10:42,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 08:10:42,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 08:10:42,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 08:10:42,851 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 4 states. [2018-12-09 08:10:42,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:42,875 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2018-12-09 08:10:42,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 08:10:42,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2018-12-09 08:10:42,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:42,876 INFO L225 Difference]: With dead ends: 93 [2018-12-09 08:10:42,877 INFO L226 Difference]: Without dead ends: 71 [2018-12-09 08:10:42,877 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 08:10:42,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-09 08:10:42,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-12-09 08:10:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-09 08:10:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-12-09 08:10:42,881 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 45 [2018-12-09 08:10:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:42,881 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-12-09 08:10:42,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 08:10:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-12-09 08:10:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-09 08:10:42,882 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:42,882 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 08:10:42,883 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:42,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:42,883 INFO L82 PathProgramCache]: Analyzing trace with hash 258354839, now seen corresponding path program 1 times [2018-12-09 08:10:42,883 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:10:42,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:10:42,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:10:42,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:42,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:10:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:42,907 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 08:10:42,907 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:42,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 08:10:42,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 08:10:42,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 08:10:42,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 08:10:42,908 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 3 states. [2018-12-09 08:10:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:42,916 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2018-12-09 08:10:42,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 08:10:42,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2018-12-09 08:10:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:42,917 INFO L225 Difference]: With dead ends: 70 [2018-12-09 08:10:42,917 INFO L226 Difference]: Without dead ends: 68 [2018-12-09 08:10:42,918 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 08:10:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-09 08:10:42,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-09 08:10:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-09 08:10:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2018-12-09 08:10:42,922 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 45 [2018-12-09 08:10:42,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:42,922 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2018-12-09 08:10:42,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 08:10:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2018-12-09 08:10:42,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-12-09 08:10:42,923 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:42,923 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 08:10:42,923 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:42,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:42,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2126980749, now seen corresponding path program 1 times [2018-12-09 08:10:42,923 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 08:10:42,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 08:10:42,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:10:42,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:42,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 08:10:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 08:10:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 08:10:42,962 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 08:10:42,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:10:42 BoogieIcfgContainer [2018-12-09 08:10:42,982 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 08:10:42,982 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 08:10:42,982 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 08:10:42,983 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 08:10:42,983 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:10:42" (3/4) ... [2018-12-09 08:10:42,985 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 08:10:42,985 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 08:10:42,985 INFO L168 Benchmark]: Toolchain (without parser) took 980.56 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 953.3 MB in the beginning and 990.7 MB in the end (delta: -37.4 MB). Peak memory consumption was 67.5 MB. Max. memory is 11.5 GB. [2018-12-09 08:10:42,986 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 08:10:42,987 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.82 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 08:10:42,987 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 942.6 MB in the beginning and 1.1 GB in the end (delta: -160.2 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. [2018-12-09 08:10:42,987 INFO L168 Benchmark]: Boogie Preprocessor took 18.80 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 08:10:42,987 INFO L168 Benchmark]: RCFGBuilder took 198.15 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2018-12-09 08:10:42,988 INFO L168 Benchmark]: TraceAbstraction took 563.29 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 990.7 MB in the end (delta: 89.7 MB). Peak memory consumption was 89.7 MB. Max. memory is 11.5 GB. [2018-12-09 08:10:42,988 INFO L168 Benchmark]: Witness Printer took 2.65 ms. Allocated memory is still 1.1 GB. Free memory is still 990.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 08:10:42,990 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 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 150.82 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 44.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 942.6 MB in the beginning and 1.1 GB in the end (delta: -160.2 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.80 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 198.15 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 563.29 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 990.7 MB in the end (delta: 89.7 MB). Peak memory consumption was 89.7 MB. Max. memory is 11.5 GB. * Witness Printer took 2.65 ms. Allocated memory is still 1.1 GB. Free memory is still 990.7 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 08:10:44,312 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 08:10:44,313 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 08:10:44,322 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 08:10:44,322 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 08:10:44,323 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 08:10:44,324 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 08:10:44,325 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 08:10:44,326 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 08:10:44,327 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 08:10:44,327 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 08:10:44,328 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 08:10:44,328 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 08:10:44,329 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 08:10:44,330 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 08:10:44,330 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 08:10:44,331 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 08:10:44,332 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 08:10:44,333 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 08:10:44,334 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 08:10:44,335 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 08:10:44,336 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 08:10:44,337 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 08:10:44,338 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 08:10:44,338 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 08:10:44,339 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 08:10:44,339 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 08:10:44,340 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 08:10:44,340 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 08:10:44,341 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 08:10:44,341 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 08:10:44,342 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 08:10:44,342 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 08:10:44,342 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 08:10:44,343 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 08:10:44,343 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 08:10:44,343 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-12-09 08:10:44,354 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 08:10:44,354 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 08:10:44,354 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 08:10:44,355 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 08:10:44,355 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 08:10:44,355 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 08:10:44,356 INFO L133 SettingsManager]: * Use SBE=true [2018-12-09 08:10:44,356 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 08:10:44,356 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 08:10:44,356 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 08:10:44,356 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 08:10:44,356 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 08:10:44,356 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 08:10:44,357 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 08:10:44,357 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-09 08:10:44,357 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-09 08:10:44,357 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 08:10:44,357 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 08:10:44,357 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 08:10:44,357 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 08:10:44,358 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 08:10:44,358 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 08:10:44,358 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 08:10:44,358 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 08:10:44,358 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 08:10:44,358 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 08:10:44,359 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 08:10:44,359 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 08:10:44,359 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-12-09 08:10:44,359 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 08:10:44,359 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-09 08:10:44,359 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-09 08:10:44,359 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_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65a8838494b0fa2a560742eb829642f08a5d8cc8 [2018-12-09 08:10:44,378 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 08:10:44,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 08:10:44,390 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 08:10:44,392 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 08:10:44,392 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 08:10:44,392 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/../../sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-12-09 08:10:44,434 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/data/6e33f0931/a8e8dfcdcf3c4db4936ff4367503af9e/FLAG6349358bd [2018-12-09 08:10:44,842 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 08:10:44,843 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/sv-benchmarks/c/float-newlib/float_req_bl_1231_true-unreach-call.c [2018-12-09 08:10:44,847 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/data/6e33f0931/a8e8dfcdcf3c4db4936ff4367503af9e/FLAG6349358bd [2018-12-09 08:10:44,855 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/data/6e33f0931/a8e8dfcdcf3c4db4936ff4367503af9e [2018-12-09 08:10:44,857 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 08:10:44,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 08:10:44,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 08:10:44,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 08:10:44,861 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 08:10:44,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:10:44" (1/1) ... [2018-12-09 08:10:44,863 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 08:10:44, skipping insertion in model container [2018-12-09 08:10:44,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:10:44" (1/1) ... [2018-12-09 08:10:44,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 08:10:44,877 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 08:10:44,971 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 08:10:44,974 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 08:10:44,990 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 08:10:45,005 INFO L195 MainTranslator]: Completed translation [2018-12-09 08:10:45,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45 WrapperNode [2018-12-09 08:10:45,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 08:10:45,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 08:10:45,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 08:10:45,006 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 08:10:45,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2018-12-09 08:10:45,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2018-12-09 08:10:45,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 08:10:45,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 08:10:45,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 08:10:45,022 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 08:10:45,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2018-12-09 08:10:45,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2018-12-09 08:10:45,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2018-12-09 08:10:45,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2018-12-09 08:10:45,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2018-12-09 08:10:45,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2018-12-09 08:10:45,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2018-12-09 08:10:45,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 08:10:45,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 08:10:45,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 08:10:45,042 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 08:10:45,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 08:10:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 08:10:45,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 08:10:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2018-12-09 08:10:45,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2018-12-09 08:10:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2018-12-09 08:10:45,106 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2018-12-09 08:10:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2018-12-09 08:10:45,106 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2018-12-09 08:10:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 08:10:45,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 08:10:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 08:10:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-12-09 08:10:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 08:10:45,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 08:10:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2018-12-09 08:10:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 08:10:45,256 WARN L317 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 08:10:45,277 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 08:10:45,277 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-09 08:10:45,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:10:45 BoogieIcfgContainer [2018-12-09 08:10:45,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 08:10:45,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 08:10:45,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 08:10:45,280 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 08:10:45,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:10:44" (1/3) ... [2018-12-09 08:10:45,280 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 08:10:45, skipping insertion in model container [2018-12-09 08:10:45,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (2/3) ... [2018-12-09 08:10:45,281 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 08:10:45, skipping insertion in model container [2018-12-09 08:10:45,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:10:45" (3/3) ... [2018-12-09 08:10:45,282 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231_true-unreach-call.c [2018-12-09 08:10:45,287 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 08:10:45,291 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-12-09 08:10:45,299 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-12-09 08:10:45,315 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 08:10:45,316 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 08:10:45,316 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 08:10:45,316 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 08:10:45,316 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 08:10:45,316 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 08:10:45,316 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 08:10:45,316 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 08:10:45,316 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 08:10:45,326 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-12-09 08:10:45,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-09 08:10:45,330 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:45,330 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 08:10:45,332 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:45,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:45,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1017347723, now seen corresponding path program 1 times [2018-12-09 08:10:45,337 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:45,338 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:45,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:45,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:45,409 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 08:10:45,409 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:10:45,418 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:45,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 08:10:45,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 08:10:45,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 08:10:45,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 08:10:45,434 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-12-09 08:10:45,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:45,452 INFO L93 Difference]: Finished difference Result 105 states and 146 transitions. [2018-12-09 08:10:45,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 08:10:45,452 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 35 [2018-12-09 08:10:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:45,458 INFO L225 Difference]: With dead ends: 105 [2018-12-09 08:10:45,458 INFO L226 Difference]: Without dead ends: 59 [2018-12-09 08:10:45,460 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 08:10:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-09 08:10:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-09 08:10:45,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-09 08:10:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2018-12-09 08:10:45,487 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 35 [2018-12-09 08:10:45,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:45,488 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2018-12-09 08:10:45,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 08:10:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2018-12-09 08:10:45,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-09 08:10:45,490 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:45,490 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 08:10:45,491 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:45,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:45,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1223757215, now seen corresponding path program 1 times [2018-12-09 08:10:45,491 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:45,492 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:45,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:45,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:45,562 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 08:10:45,562 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:10:45,569 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:45,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 08:10:45,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 08:10:45,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 08:10:45,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 08:10:45,570 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2018-12-09 08:10:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:45,598 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2018-12-09 08:10:45,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 08:10:45,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-12-09 08:10:45,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:45,599 INFO L225 Difference]: With dead ends: 108 [2018-12-09 08:10:45,599 INFO L226 Difference]: Without dead ends: 68 [2018-12-09 08:10:45,600 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 08:10:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-09 08:10:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2018-12-09 08:10:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-09 08:10:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2018-12-09 08:10:45,606 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 36 [2018-12-09 08:10:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:45,606 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2018-12-09 08:10:45,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 08:10:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-12-09 08:10:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-09 08:10:45,607 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:45,607 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 08:10:45,607 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:45,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:45,607 INFO L82 PathProgramCache]: Analyzing trace with hash 435900908, now seen corresponding path program 1 times [2018-12-09 08:10:45,608 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:45,608 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:45,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:45,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:45,659 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 08:10:45,660 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:10:45,671 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:45,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 08:10:45,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 08:10:45,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 08:10:45,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 08:10:45,672 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand 4 states. [2018-12-09 08:10:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:45,691 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2018-12-09 08:10:45,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 08:10:45,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-12-09 08:10:45,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:45,693 INFO L225 Difference]: With dead ends: 86 [2018-12-09 08:10:45,693 INFO L226 Difference]: Without dead ends: 64 [2018-12-09 08:10:45,694 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 08:10:45,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-09 08:10:45,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-12-09 08:10:45,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 08:10:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-09 08:10:45,698 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 41 [2018-12-09 08:10:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:45,699 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-09 08:10:45,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 08:10:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-09 08:10:45,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-09 08:10:45,700 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:45,700 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 08:10:45,700 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:45,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:45,700 INFO L82 PathProgramCache]: Analyzing trace with hash -588522803, now seen corresponding path program 1 times [2018-12-09 08:10:45,700 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:45,700 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:45,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:45,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:45,759 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 08:10:45,759 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:10:45,770 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:45,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 08:10:45,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 08:10:45,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 08:10:45,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 08:10:45,771 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-12-09 08:10:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:45,789 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-09 08:10:45,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 08:10:45,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2018-12-09 08:10:45,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:45,790 INFO L225 Difference]: With dead ends: 89 [2018-12-09 08:10:45,790 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 08:10:45,791 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 08:10:45,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 08:10:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-12-09 08:10:45,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 08:10:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-09 08:10:45,796 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 42 [2018-12-09 08:10:45,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:45,796 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-09 08:10:45,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 08:10:45,796 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-09 08:10:45,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-09 08:10:45,797 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:45,797 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 08:10:45,797 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:45,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:45,798 INFO L82 PathProgramCache]: Analyzing trace with hash -545646832, now seen corresponding path program 1 times [2018-12-09 08:10:45,798 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:45,798 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:45,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:45,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:45,855 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 08:10:45,855 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:10:45,861 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:45,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 08:10:45,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 08:10:45,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 08:10:45,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 08:10:45,862 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-12-09 08:10:45,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:45,878 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-09 08:10:45,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 08:10:45,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-12-09 08:10:45,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:45,879 INFO L225 Difference]: With dead ends: 89 [2018-12-09 08:10:45,879 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 08:10:45,879 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 08:10:45,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 08:10:45,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-12-09 08:10:45,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 08:10:45,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-09 08:10:45,883 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 43 [2018-12-09 08:10:45,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:45,884 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-09 08:10:45,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 08:10:45,884 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-09 08:10:45,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-09 08:10:45,885 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:45,885 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 08:10:45,885 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:45,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:45,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1776219087, now seen corresponding path program 1 times [2018-12-09 08:10:45,885 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:45,885 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:45,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:45,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:45,929 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 08:10:45,929 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:10:45,936 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:45,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 08:10:45,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 08:10:45,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 08:10:45,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 08:10:45,937 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 4 states. [2018-12-09 08:10:45,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:45,955 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-09 08:10:45,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 08:10:45,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-12-09 08:10:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:45,956 INFO L225 Difference]: With dead ends: 89 [2018-12-09 08:10:45,956 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 08:10:45,956 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 08:10:45,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 08:10:45,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-12-09 08:10:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 08:10:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-12-09 08:10:45,960 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 44 [2018-12-09 08:10:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:45,960 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2018-12-09 08:10:45,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 08:10:45,960 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-12-09 08:10:45,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-09 08:10:45,961 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:45,961 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 08:10:45,961 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:45,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:45,962 INFO L82 PathProgramCache]: Analyzing trace with hash -268667278, now seen corresponding path program 1 times [2018-12-09 08:10:45,962 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:45,962 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:45,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:46,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:46,103 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 08:10:46,103 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 08:10:46,299 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 08:10:46,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:10:46,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2018-12-09 08:10:46,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 08:10:46,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 08:10:46,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-12-09 08:10:46,310 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 13 states. [2018-12-09 08:10:46,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:46,637 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2018-12-09 08:10:46,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 08:10:46,637 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2018-12-09 08:10:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:46,638 INFO L225 Difference]: With dead ends: 104 [2018-12-09 08:10:46,638 INFO L226 Difference]: Without dead ends: 90 [2018-12-09 08:10:46,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2018-12-09 08:10:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-12-09 08:10:46,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2018-12-09 08:10:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-12-09 08:10:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 101 transitions. [2018-12-09 08:10:46,644 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 101 transitions. Word has length 44 [2018-12-09 08:10:46,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:46,644 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 101 transitions. [2018-12-09 08:10:46,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 08:10:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 101 transitions. [2018-12-09 08:10:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-12-09 08:10:46,645 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:46,645 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 08:10:46,645 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:46,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:46,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1115369263, now seen corresponding path program 1 times [2018-12-09 08:10:46,646 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:46,646 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:46,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:46,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:46,750 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 08:10:46,750 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:10:46,760 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:46,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-09 08:10:46,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 08:10:46,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 08:10:46,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-12-09 08:10:46,761 INFO L87 Difference]: Start difference. First operand 76 states and 101 transitions. Second operand 8 states. [2018-12-09 08:10:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:47,039 INFO L93 Difference]: Finished difference Result 133 states and 174 transitions. [2018-12-09 08:10:47,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 08:10:47,040 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2018-12-09 08:10:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:47,041 INFO L225 Difference]: With dead ends: 133 [2018-12-09 08:10:47,041 INFO L226 Difference]: Without dead ends: 89 [2018-12-09 08:10:47,041 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-12-09 08:10:47,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-12-09 08:10:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2018-12-09 08:10:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-12-09 08:10:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2018-12-09 08:10:47,053 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 46 [2018-12-09 08:10:47,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:47,053 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2018-12-09 08:10:47,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 08:10:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2018-12-09 08:10:47,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-12-09 08:10:47,054 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:47,054 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 08:10:47,054 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:47,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:47,054 INFO L82 PathProgramCache]: Analyzing trace with hash 2005906004, now seen corresponding path program 1 times [2018-12-09 08:10:47,055 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:47,055 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:47,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:47,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 08:10:47,098 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:10:47,104 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:47,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 08:10:47,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 08:10:47,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 08:10:47,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 08:10:47,105 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand 3 states. [2018-12-09 08:10:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:47,114 INFO L93 Difference]: Finished difference Result 79 states and 103 transitions. [2018-12-09 08:10:47,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 08:10:47,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2018-12-09 08:10:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:47,116 INFO L225 Difference]: With dead ends: 79 [2018-12-09 08:10:47,116 INFO L226 Difference]: Without dead ends: 77 [2018-12-09 08:10:47,116 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 08:10:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-12-09 08:10:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-12-09 08:10:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-12-09 08:10:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2018-12-09 08:10:47,120 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 51 [2018-12-09 08:10:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:47,121 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2018-12-09 08:10:47,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 08:10:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2018-12-09 08:10:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 08:10:47,122 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:47,122 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 08:10:47,122 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:47,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:47,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1686772588, now seen corresponding path program 1 times [2018-12-09 08:10:47,122 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:47,123 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:47,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:47,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 08:10:47,234 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 08:10:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 08:10:47,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:10:47,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2018-12-09 08:10:47,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 08:10:47,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 08:10:47,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-12-09 08:10:47,415 INFO L87 Difference]: Start difference. First operand 77 states and 101 transitions. Second operand 12 states. [2018-12-09 08:10:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:47,678 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2018-12-09 08:10:47,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 08:10:47,678 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2018-12-09 08:10:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:47,679 INFO L225 Difference]: With dead ends: 102 [2018-12-09 08:10:47,679 INFO L226 Difference]: Without dead ends: 86 [2018-12-09 08:10:47,680 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-12-09 08:10:47,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-12-09 08:10:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2018-12-09 08:10:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-12-09 08:10:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2018-12-09 08:10:47,687 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 56 [2018-12-09 08:10:47,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:47,687 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2018-12-09 08:10:47,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 08:10:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2018-12-09 08:10:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-09 08:10:47,688 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:47,688 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 08:10:47,689 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:47,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:47,689 INFO L82 PathProgramCache]: Analyzing trace with hash 798294838, now seen corresponding path program 1 times [2018-12-09 08:10:47,689 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:47,689 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:47,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:47,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:47,865 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 08:10:47,865 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 08:10:48,280 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 08:10:48,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:10:48,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2018-12-09 08:10:48,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-09 08:10:48,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-09 08:10:48,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2018-12-09 08:10:48,295 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand 19 states. [2018-12-09 08:10:49,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:49,267 INFO L93 Difference]: Finished difference Result 116 states and 150 transitions. [2018-12-09 08:10:49,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-09 08:10:49,267 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2018-12-09 08:10:49,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:49,267 INFO L225 Difference]: With dead ends: 116 [2018-12-09 08:10:49,268 INFO L226 Difference]: Without dead ends: 114 [2018-12-09 08:10:49,268 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2018-12-09 08:10:49,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-12-09 08:10:49,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2018-12-09 08:10:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-12-09 08:10:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 115 transitions. [2018-12-09 08:10:49,274 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 115 transitions. Word has length 49 [2018-12-09 08:10:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:49,275 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 115 transitions. [2018-12-09 08:10:49,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-09 08:10:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 115 transitions. [2018-12-09 08:10:49,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 08:10:49,275 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:49,275 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 08:10:49,275 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:49,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:49,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1349420364, now seen corresponding path program 1 times [2018-12-09 08:10:49,276 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:49,276 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:49,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:49,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-09 08:10:49,377 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 08:10:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 08:10:49,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:10:49,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2018-12-09 08:10:49,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-09 08:10:49,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-09 08:10:49,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-12-09 08:10:49,577 INFO L87 Difference]: Start difference. First operand 87 states and 115 transitions. Second operand 14 states. [2018-12-09 08:10:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:49,956 INFO L93 Difference]: Finished difference Result 142 states and 182 transitions. [2018-12-09 08:10:49,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 08:10:49,956 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2018-12-09 08:10:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:49,957 INFO L225 Difference]: With dead ends: 142 [2018-12-09 08:10:49,957 INFO L226 Difference]: Without dead ends: 89 [2018-12-09 08:10:49,957 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-12-09 08:10:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-12-09 08:10:49,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2018-12-09 08:10:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-09 08:10:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2018-12-09 08:10:49,962 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 56 [2018-12-09 08:10:49,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:49,962 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2018-12-09 08:10:49,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-09 08:10:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2018-12-09 08:10:49,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-09 08:10:49,963 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:49,963 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 08:10:49,963 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:49,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:49,963 INFO L82 PathProgramCache]: Analyzing trace with hash -26719360, now seen corresponding path program 1 times [2018-12-09 08:10:49,964 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:49,964 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:49,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:50,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:50,080 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 08:10:50,080 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 08:10:50,241 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 08:10:50,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:10:50,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2018-12-09 08:10:50,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 08:10:50,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 08:10:50,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-12-09 08:10:50,251 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 12 states. [2018-12-09 08:10:50,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:50,493 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2018-12-09 08:10:50,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 08:10:50,493 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2018-12-09 08:10:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:50,494 INFO L225 Difference]: With dead ends: 92 [2018-12-09 08:10:50,494 INFO L226 Difference]: Without dead ends: 89 [2018-12-09 08:10:50,494 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-12-09 08:10:50,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-12-09 08:10:50,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2018-12-09 08:10:50,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-12-09 08:10:50,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2018-12-09 08:10:50,499 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 58 [2018-12-09 08:10:50,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:50,500 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2018-12-09 08:10:50,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 08:10:50,500 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2018-12-09 08:10:50,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-12-09 08:10:50,500 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:50,500 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 08:10:50,500 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:50,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:50,500 INFO L82 PathProgramCache]: Analyzing trace with hash -335762184, now seen corresponding path program 1 times [2018-12-09 08:10:50,501 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:50,501 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:50,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:50,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:50,549 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 08:10:50,549 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:10:50,556 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:50,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 08:10:50,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 08:10:50,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 08:10:50,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 08:10:50,557 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand 4 states. [2018-12-09 08:10:50,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:50,567 INFO L93 Difference]: Finished difference Result 116 states and 147 transitions. [2018-12-09 08:10:50,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 08:10:50,567 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2018-12-09 08:10:50,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:50,568 INFO L225 Difference]: With dead ends: 116 [2018-12-09 08:10:50,568 INFO L226 Difference]: Without dead ends: 86 [2018-12-09 08:10:50,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 08:10:50,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-12-09 08:10:50,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-12-09 08:10:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-12-09 08:10:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2018-12-09 08:10:50,572 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 54 [2018-12-09 08:10:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:50,572 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2018-12-09 08:10:50,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 08:10:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2018-12-09 08:10:50,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-09 08:10:50,573 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:50,573 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 08:10:50,573 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:50,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:50,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1557840485, now seen corresponding path program 1 times [2018-12-09 08:10:50,573 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:50,573 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:50,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:50,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:50,623 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 08:10:50,623 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:10:50,630 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:50,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 08:10:50,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 08:10:50,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 08:10:50,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 08:10:50,631 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand 4 states. [2018-12-09 08:10:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:50,641 INFO L93 Difference]: Finished difference Result 119 states and 151 transitions. [2018-12-09 08:10:50,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 08:10:50,641 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-12-09 08:10:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:50,642 INFO L225 Difference]: With dead ends: 119 [2018-12-09 08:10:50,642 INFO L226 Difference]: Without dead ends: 89 [2018-12-09 08:10:50,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 08:10:50,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-12-09 08:10:50,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2018-12-09 08:10:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-12-09 08:10:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2018-12-09 08:10:50,646 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 55 [2018-12-09 08:10:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:50,647 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2018-12-09 08:10:50,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 08:10:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2018-12-09 08:10:50,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 08:10:50,648 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:50,648 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 08:10:50,648 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:50,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:50,648 INFO L82 PathProgramCache]: Analyzing trace with hash -931228901, now seen corresponding path program 1 times [2018-12-09 08:10:50,648 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:50,648 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:50,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:50,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:50,922 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 08:10:50,922 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:10:50,937 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:50,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-12-09 08:10:50,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 08:10:50,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 08:10:50,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-12-09 08:10:50,938 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand 11 states. [2018-12-09 08:10:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:51,490 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2018-12-09 08:10:51,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 08:10:51,491 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-12-09 08:10:51,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:51,491 INFO L225 Difference]: With dead ends: 121 [2018-12-09 08:10:51,491 INFO L226 Difference]: Without dead ends: 119 [2018-12-09 08:10:51,492 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 08:10:51,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-12-09 08:10:51,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2018-12-09 08:10:51,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-09 08:10:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2018-12-09 08:10:51,497 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 56 [2018-12-09 08:10:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:51,498 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2018-12-09 08:10:51,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 08:10:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2018-12-09 08:10:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 08:10:51,498 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:51,498 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 08:10:51,498 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:51,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:51,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1062915805, now seen corresponding path program 1 times [2018-12-09 08:10:51,499 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:51,499 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/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 08:10:51,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:51,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:51,696 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 08:10:51,696 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 08:10:51,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 08:10:51,846 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/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 08:10:51,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:51,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:51,876 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 08:10:51,876 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 08:10:52,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:10:52,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-09 08:10:52,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 08:10:52,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 08:10:52,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-09 08:10:52,062 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand 8 states. [2018-12-09 08:10:52,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:52,639 INFO L93 Difference]: Finished difference Result 119 states and 149 transitions. [2018-12-09 08:10:52,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 08:10:52,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2018-12-09 08:10:52,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:52,639 INFO L225 Difference]: With dead ends: 119 [2018-12-09 08:10:52,639 INFO L226 Difference]: Without dead ends: 99 [2018-12-09 08:10:52,640 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 08:10:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-12-09 08:10:52,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2018-12-09 08:10:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-12-09 08:10:52,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2018-12-09 08:10:52,644 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 56 [2018-12-09 08:10:52,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:52,645 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2018-12-09 08:10:52,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 08:10:52,645 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2018-12-09 08:10:52,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 08:10:52,646 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:52,646 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 08:10:52,646 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:52,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:52,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1505315820, now seen corresponding path program 1 times [2018-12-09 08:10:52,646 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:52,647 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:52,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:52,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:52,695 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 08:10:52,695 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:10:52,702 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:52,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 08:10:52,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 08:10:52,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 08:10:52,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 08:10:52,703 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand 4 states. [2018-12-09 08:10:52,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:52,713 INFO L93 Difference]: Finished difference Result 127 states and 161 transitions. [2018-12-09 08:10:52,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 08:10:52,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-12-09 08:10:52,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:52,714 INFO L225 Difference]: With dead ends: 127 [2018-12-09 08:10:52,714 INFO L226 Difference]: Without dead ends: 97 [2018-12-09 08:10:52,714 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 08:10:52,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-12-09 08:10:52,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2018-12-09 08:10:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-12-09 08:10:52,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2018-12-09 08:10:52,721 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 56 [2018-12-09 08:10:52,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:52,722 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2018-12-09 08:10:52,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 08:10:52,722 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2018-12-09 08:10:52,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 08:10:52,722 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:52,722 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 08:10:52,722 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:52,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:52,722 INFO L82 PathProgramCache]: Analyzing trace with hash 965908574, now seen corresponding path program 1 times [2018-12-09 08:10:52,723 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:52,723 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:52,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:52,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:52,816 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 08:10:52,816 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 08:10:52,970 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 08:10:52,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:10:52,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2018-12-09 08:10:52,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 08:10:52,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 08:10:52,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-12-09 08:10:52,978 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand 13 states. [2018-12-09 08:10:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:53,296 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2018-12-09 08:10:53,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 08:10:53,297 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2018-12-09 08:10:53,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:53,297 INFO L225 Difference]: With dead ends: 104 [2018-12-09 08:10:53,297 INFO L226 Difference]: Without dead ends: 85 [2018-12-09 08:10:53,297 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2018-12-09 08:10:53,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-12-09 08:10:53,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2018-12-09 08:10:53,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-12-09 08:10:53,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2018-12-09 08:10:53,301 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 56 [2018-12-09 08:10:53,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:53,301 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2018-12-09 08:10:53,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 08:10:53,301 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2018-12-09 08:10:53,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-09 08:10:53,302 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:53,302 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 08:10:53,302 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:53,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:53,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1712579960, now seen corresponding path program 1 times [2018-12-09 08:10:53,302 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:53,302 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/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 08:10:53,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:53,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:53,746 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 08:10:53,747 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 08:10:53,865 WARN L180 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-09 08:10:54,612 WARN L180 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-09 08:10:54,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 08:10:54,903 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/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 08:10:54,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:54,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:55,094 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 08:10:55,094 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 08:10:55,246 WARN L180 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-09 08:10:55,696 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-09 08:10:56,133 WARN L180 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-12-09 08:10:56,284 WARN L180 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-09 08:10:56,522 WARN L180 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-12-09 08:10:56,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:10:56,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 17 [2018-12-09 08:10:56,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 08:10:56,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 08:10:56,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-12-09 08:10:56,616 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand 17 states. [2018-12-09 08:10:58,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:58,070 INFO L93 Difference]: Finished difference Result 114 states and 145 transitions. [2018-12-09 08:10:58,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-09 08:10:58,071 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-12-09 08:10:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:58,071 INFO L225 Difference]: With dead ends: 114 [2018-12-09 08:10:58,071 INFO L226 Difference]: Without dead ends: 90 [2018-12-09 08:10:58,072 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2018-12-09 08:10:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-12-09 08:10:58,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2018-12-09 08:10:58,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-12-09 08:10:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 111 transitions. [2018-12-09 08:10:58,075 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 111 transitions. Word has length 63 [2018-12-09 08:10:58,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:58,075 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 111 transitions. [2018-12-09 08:10:58,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 08:10:58,076 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 111 transitions. [2018-12-09 08:10:58,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-09 08:10:58,076 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:58,076 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 08:10:58,076 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:58,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:58,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2049769800, now seen corresponding path program 1 times [2018-12-09 08:10:58,076 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:58,077 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:58,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:58,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:58,264 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 08:10:58,264 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 08:10:58,806 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 08:10:58,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:10:58,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-12-09 08:10:58,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-09 08:10:58,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-09 08:10:58,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2018-12-09 08:10:58,814 INFO L87 Difference]: Start difference. First operand 88 states and 111 transitions. Second operand 21 states. [2018-12-09 08:10:59,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:59,378 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2018-12-09 08:10:59,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-09 08:10:59,379 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2018-12-09 08:10:59,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:59,379 INFO L225 Difference]: With dead ends: 105 [2018-12-09 08:10:59,379 INFO L226 Difference]: Without dead ends: 91 [2018-12-09 08:10:59,380 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2018-12-09 08:10:59,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-12-09 08:10:59,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2018-12-09 08:10:59,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-12-09 08:10:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2018-12-09 08:10:59,383 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 57 [2018-12-09 08:10:59,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:59,383 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2018-12-09 08:10:59,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-09 08:10:59,383 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2018-12-09 08:10:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-09 08:10:59,384 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:59,384 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 08:10:59,384 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:59,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:59,384 INFO L82 PathProgramCache]: Analyzing trace with hash 685789633, now seen corresponding path program 1 times [2018-12-09 08:10:59,384 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:59,384 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 25 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:59,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:59,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:59,441 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 08:10:59,441 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:10:59,448 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:59,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 08:10:59,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 08:10:59,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 08:10:59,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 08:10:59,449 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand 4 states. [2018-12-09 08:10:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:10:59,460 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2018-12-09 08:10:59,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 08:10:59,460 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-12-09 08:10:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:10:59,460 INFO L225 Difference]: With dead ends: 111 [2018-12-09 08:10:59,460 INFO L226 Difference]: Without dead ends: 81 [2018-12-09 08:10:59,461 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 08:10:59,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-12-09 08:10:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2018-12-09 08:10:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-09 08:10:59,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2018-12-09 08:10:59,464 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 57 [2018-12-09 08:10:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:10:59,464 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2018-12-09 08:10:59,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 08:10:59,464 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2018-12-09 08:10:59,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-09 08:10:59,465 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:10:59,465 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 08:10:59,465 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:10:59,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:10:59,465 INFO L82 PathProgramCache]: Analyzing trace with hash 276965408, now seen corresponding path program 1 times [2018-12-09 08:10:59,465 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:10:59,465 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 26 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with mathsat -unsat_core_generation=3 [2018-12-09 08:10:59,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:10:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:10:59,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:10:59,936 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 08:10:59,936 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:10:59,943 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:10:59,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2018-12-09 08:10:59,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-09 08:10:59,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-09 08:10:59,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-12-09 08:10:59,944 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand 15 states. [2018-12-09 08:11:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:11:01,143 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2018-12-09 08:11:01,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-09 08:11:01,143 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-12-09 08:11:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:11:01,144 INFO L225 Difference]: With dead ends: 107 [2018-12-09 08:11:01,144 INFO L226 Difference]: Without dead ends: 68 [2018-12-09 08:11:01,144 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 08:11:01,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-09 08:11:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2018-12-09 08:11:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-09 08:11:01,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2018-12-09 08:11:01,148 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 57 [2018-12-09 08:11:01,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:11:01,148 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2018-12-09 08:11:01,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-09 08:11:01,148 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2018-12-09 08:11:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-12-09 08:11:01,148 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:11:01,149 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 08:11:01,149 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:11:01,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:11:01,149 INFO L82 PathProgramCache]: Analyzing trace with hash -820099601, now seen corresponding path program 1 times [2018-12-09 08:11:01,149 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:11:01,149 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 27 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with mathsat -unsat_core_generation=3 [2018-12-09 08:11:01,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:11:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:11:01,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:11:01,339 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 08:11:01,339 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:11:01,346 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:11:01,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-09 08:11:01,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 08:11:01,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 08:11:01,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-09 08:11:01,347 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 12 states. [2018-12-09 08:11:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:11:01,937 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2018-12-09 08:11:01,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 08:11:01,937 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2018-12-09 08:11:01,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:11:01,938 INFO L225 Difference]: With dead ends: 80 [2018-12-09 08:11:01,938 INFO L226 Difference]: Without dead ends: 59 [2018-12-09 08:11:01,938 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 08:11:01,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-09 08:11:01,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-09 08:11:01,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-09 08:11:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-12-09 08:11:01,940 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 70 [2018-12-09 08:11:01,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:11:01,941 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-12-09 08:11:01,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 08:11:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-12-09 08:11:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-12-09 08:11:01,941 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:11:01,941 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 08:11:01,941 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:11:01,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:11:01,941 INFO L82 PathProgramCache]: Analyzing trace with hash -429306586, now seen corresponding path program 1 times [2018-12-09 08:11:01,942 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:11:01,942 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 28 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with mathsat -unsat_core_generation=3 [2018-12-09 08:11:01,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:11:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:11:01,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:11:02,184 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 08:11:02,184 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:11:02,196 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:11:02,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-09 08:11:02,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 08:11:02,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 08:11:02,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-09 08:11:02,197 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 12 states. [2018-12-09 08:11:02,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:11:02,877 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2018-12-09 08:11:02,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 08:11:02,877 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2018-12-09 08:11:02,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:11:02,878 INFO L225 Difference]: With dead ends: 82 [2018-12-09 08:11:02,878 INFO L226 Difference]: Without dead ends: 61 [2018-12-09 08:11:02,878 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 08:11:02,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-09 08:11:02,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-12-09 08:11:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-09 08:11:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-12-09 08:11:02,880 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 71 [2018-12-09 08:11:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:11:02,881 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-12-09 08:11:02,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 08:11:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-12-09 08:11:02,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-12-09 08:11:02,881 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:11:02,881 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 08:11:02,881 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:11:02,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:11:02,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1994702002, now seen corresponding path program 1 times [2018-12-09 08:11:02,881 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:11:02,882 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 29 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with mathsat -unsat_core_generation=3 [2018-12-09 08:11:02,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:11:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:11:02,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:11:03,047 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 08:11:03,047 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 08:11:03,691 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 08:11:03,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:11:03,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-12-09 08:11:03,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 08:11:03,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 08:11:03,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-12-09 08:11:03,699 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 17 states. [2018-12-09 08:11:04,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:11:04,392 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2018-12-09 08:11:04,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 08:11:04,393 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-12-09 08:11:04,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:11:04,393 INFO L225 Difference]: With dead ends: 88 [2018-12-09 08:11:04,393 INFO L226 Difference]: Without dead ends: 73 [2018-12-09 08:11:04,394 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2018-12-09 08:11:04,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-09 08:11:04,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2018-12-09 08:11:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 08:11:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2018-12-09 08:11:04,396 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 71 [2018-12-09 08:11:04,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:11:04,396 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2018-12-09 08:11:04,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 08:11:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2018-12-09 08:11:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-12-09 08:11:04,397 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:11:04,397 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 08:11:04,397 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:11:04,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:11:04,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1572781779, now seen corresponding path program 1 times [2018-12-09 08:11:04,397 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:11:04,397 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 30 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with mathsat -unsat_core_generation=3 [2018-12-09 08:11:04,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:11:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:11:04,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:11:04,673 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 08:11:04,674 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:11:04,681 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:11:04,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-09 08:11:04,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 08:11:04,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 08:11:04,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-09 08:11:04,682 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 12 states. [2018-12-09 08:11:05,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:11:05,455 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2018-12-09 08:11:05,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 08:11:05,456 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2018-12-09 08:11:05,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:11:05,456 INFO L225 Difference]: With dead ends: 87 [2018-12-09 08:11:05,456 INFO L226 Difference]: Without dead ends: 66 [2018-12-09 08:11:05,456 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 08:11:05,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-12-09 08:11:05,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2018-12-09 08:11:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 08:11:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2018-12-09 08:11:05,459 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 72 [2018-12-09 08:11:05,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:11:05,459 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2018-12-09 08:11:05,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 08:11:05,459 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2018-12-09 08:11:05,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-12-09 08:11:05,459 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:11:05,459 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 08:11:05,460 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:11:05,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:11:05,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1981385, now seen corresponding path program 1 times [2018-12-09 08:11:05,460 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:11:05,460 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 31 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with mathsat -unsat_core_generation=3 [2018-12-09 08:11:05,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:11:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:11:05,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:11:05,616 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 08:11:05,616 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 08:11:05,849 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 08:11:05,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 08:11:05,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-12-09 08:11:05,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 08:11:05,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 08:11:05,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2018-12-09 08:11:05,857 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 17 states. [2018-12-09 08:11:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:11:06,271 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2018-12-09 08:11:06,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 08:11:06,271 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2018-12-09 08:11:06,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:11:06,272 INFO L225 Difference]: With dead ends: 80 [2018-12-09 08:11:06,272 INFO L226 Difference]: Without dead ends: 65 [2018-12-09 08:11:06,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2018-12-09 08:11:06,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-12-09 08:11:06,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2018-12-09 08:11:06,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-09 08:11:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2018-12-09 08:11:06,275 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 72 [2018-12-09 08:11:06,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:11:06,275 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2018-12-09 08:11:06,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 08:11:06,275 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2018-12-09 08:11:06,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-09 08:11:06,275 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:11:06,275 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 08:11:06,276 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:11:06,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:11:06,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1985418442, now seen corresponding path program 1 times [2018-12-09 08:11:06,276 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:11:06,276 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 32 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with mathsat -unsat_core_generation=3 [2018-12-09 08:11:06,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:11:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:11:06,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:11:06,464 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 08:11:06,464 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:11:06,471 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:11:06,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-12-09 08:11:06,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 08:11:06,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 08:11:06,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-09 08:11:06,472 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 12 states. [2018-12-09 08:11:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:11:07,079 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2018-12-09 08:11:07,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 08:11:07,080 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2018-12-09 08:11:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:11:07,080 INFO L225 Difference]: With dead ends: 78 [2018-12-09 08:11:07,080 INFO L226 Difference]: Without dead ends: 57 [2018-12-09 08:11:07,080 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-09 08:11:07,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-09 08:11:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2018-12-09 08:11:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-09 08:11:07,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2018-12-09 08:11:07,083 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 73 [2018-12-09 08:11:07,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:11:07,083 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2018-12-09 08:11:07,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 08:11:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2018-12-09 08:11:07,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-09 08:11:07,083 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 08:11:07,084 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 08:11:07,084 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 08:11:07,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 08:11:07,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1616447157, now seen corresponding path program 1 times [2018-12-09 08:11:07,084 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-09 08:11:07,084 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/mathsat Starting monitored process 33 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with mathsat -unsat_core_generation=3 [2018-12-09 08:11:07,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 08:11:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 08:11:07,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 08:11:07,145 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 08:11:07,146 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 08:11:07,152 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 08:11:07,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 08:11:07,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 08:11:07,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 08:11:07,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 08:11:07,153 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 4 states. [2018-12-09 08:11:07,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 08:11:07,159 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-12-09 08:11:07,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 08:11:07,159 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2018-12-09 08:11:07,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 08:11:07,159 INFO L225 Difference]: With dead ends: 58 [2018-12-09 08:11:07,159 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 08:11:07,160 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 08:11:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 08:11:07,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 08:11:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 08:11:07,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 08:11:07,160 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2018-12-09 08:11:07,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 08:11:07,160 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 08:11:07,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 08:11:07,160 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 08:11:07,160 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 08:11:07,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 08:11:07,435 INFO L448 ceAbstractionStarter]: For program point isnan_floatFINAL(line 57) no Hoare annotation was computed. [2018-12-09 08:11:07,435 INFO L451 ceAbstractionStarter]: At program point isnan_floatENTRY(line 57) the Hoare annotation is: true [2018-12-09 08:11:07,435 INFO L448 ceAbstractionStarter]: For program point isnan_floatEXIT(line 57) no Hoare annotation was computed. [2018-12-09 08:11:07,435 INFO L451 ceAbstractionStarter]: At program point fmin_floatENTRY(lines 35 42) the Hoare annotation is: true [2018-12-09 08:11:07,435 INFO L448 ceAbstractionStarter]: For program point fmin_floatEXIT(lines 35 42) no Hoare annotation was computed. [2018-12-09 08:11:07,435 INFO L448 ceAbstractionStarter]: For program point fmin_floatFINAL(lines 35 42) no Hoare annotation was computed. [2018-12-09 08:11:07,435 INFO L448 ceAbstractionStarter]: For program point L41(line 41) no Hoare annotation was computed. [2018-12-09 08:11:07,435 INFO L448 ceAbstractionStarter]: For program point L41-2(line 41) no Hoare annotation was computed. [2018-12-09 08:11:07,435 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 08:11:07,435 INFO L448 ceAbstractionStarter]: For program point L38-1(lines 38 39) no Hoare annotation was computed. [2018-12-09 08:11:07,435 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 08:11:07,435 INFO L448 ceAbstractionStarter]: For program point L36-1(lines 36 37) no Hoare annotation was computed. [2018-12-09 08:11:07,436 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-12-09 08:11:07,436 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-12-09 08:11:07,436 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 08:11:07,436 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 08:11:07,436 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 08:11:07,436 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 08:11:07,436 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 08:11:07,436 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 08:11:07,436 INFO L448 ceAbstractionStarter]: For program point L68-4(line 68) no Hoare annotation was computed. [2018-12-09 08:11:07,436 INFO L448 ceAbstractionStarter]: For program point L68-6(line 68) no Hoare annotation was computed. [2018-12-09 08:11:07,436 INFO L448 ceAbstractionStarter]: For program point L68-7(lines 68 69) no Hoare annotation was computed. [2018-12-09 08:11:07,436 INFO L448 ceAbstractionStarter]: For program point L68-9(lines 68 84) no Hoare annotation was computed. [2018-12-09 08:11:07,436 INFO L448 ceAbstractionStarter]: For program point L68-11(lines 68 84) no Hoare annotation was computed. [2018-12-09 08:11:07,436 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 59 87) no Hoare annotation was computed. [2018-12-09 08:11:07,436 INFO L448 ceAbstractionStarter]: For program point L81(line 81) no Hoare annotation was computed. [2018-12-09 08:11:07,436 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 08:11:07,436 INFO L448 ceAbstractionStarter]: For program point L69-1(line 69) no Hoare annotation was computed. [2018-12-09 08:11:07,436 INFO L448 ceAbstractionStarter]: For program point L69-2(line 69) no Hoare annotation was computed. [2018-12-09 08:11:07,436 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 08:11:07,436 INFO L448 ceAbstractionStarter]: For program point L69-4(line 69) no Hoare annotation was computed. [2018-12-09 08:11:07,436 INFO L448 ceAbstractionStarter]: For program point L69-6(line 69) no Hoare annotation was computed. [2018-12-09 08:11:07,437 INFO L448 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 81) no Hoare annotation was computed. [2018-12-09 08:11:07,437 INFO L444 ceAbstractionStarter]: At program point L74(line 74) the Hoare annotation is: (let ((.cse1 (fp.eq main_~x~0 main_~x~0)) (.cse0 (fp.eq main_~y~0 main_~y~0))) (or (and (and (= main_~y~0 main_~res~0) .cse0) (not .cse1)) (and (= main_~x~0 main_~res~0) .cse1 (not .cse0)))) [2018-12-09 08:11:07,437 INFO L448 ceAbstractionStarter]: For program point L74-1(line 74) no Hoare annotation was computed. [2018-12-09 08:11:07,437 INFO L448 ceAbstractionStarter]: For program point L74-2(line 74) no Hoare annotation was computed. [2018-12-09 08:11:07,437 INFO L444 ceAbstractionStarter]: At program point L74-3(line 74) the Hoare annotation is: (and (= main_~y~0 main_~res~0) |main_#t~short19| (fp.eq main_~y~0 main_~y~0) (not (fp.eq main_~x~0 main_~x~0))) [2018-12-09 08:11:07,437 INFO L448 ceAbstractionStarter]: For program point L74-4(line 74) no Hoare annotation was computed. [2018-12-09 08:11:07,437 INFO L448 ceAbstractionStarter]: For program point L74-6(lines 74 77) no Hoare annotation was computed. [2018-12-09 08:11:07,437 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 75) no Hoare annotation was computed. [2018-12-09 08:11:07,437 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 59 87) no Hoare annotation was computed. [2018-12-09 08:11:07,437 INFO L448 ceAbstractionStarter]: For program point L75(line 75) no Hoare annotation was computed. [2018-12-09 08:11:07,437 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 08:11:07,437 INFO L448 ceAbstractionStarter]: For program point L71-1(line 71) no Hoare annotation was computed. [2018-12-09 08:11:07,437 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 59 87) the Hoare annotation is: true [2018-12-09 08:11:07,437 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 08:11:07,437 INFO L448 ceAbstractionStarter]: For program point L80-1(line 80) no Hoare annotation was computed. [2018-12-09 08:11:07,437 INFO L448 ceAbstractionStarter]: For program point L80-2(line 80) no Hoare annotation was computed. [2018-12-09 08:11:07,437 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 08:11:07,437 INFO L448 ceAbstractionStarter]: For program point L80-4(line 80) no Hoare annotation was computed. [2018-12-09 08:11:07,438 INFO L448 ceAbstractionStarter]: For program point L80-6(lines 80 83) no Hoare annotation was computed. [2018-12-09 08:11:07,438 INFO L451 ceAbstractionStarter]: At program point L68(line 68) the Hoare annotation is: true [2018-12-09 08:11:07,438 INFO L448 ceAbstractionStarter]: For program point L68-1(line 68) no Hoare annotation was computed. [2018-12-09 08:11:07,438 INFO L448 ceAbstractionStarter]: For program point L68-2(line 68) no Hoare annotation was computed. [2018-12-09 08:11:07,438 INFO L448 ceAbstractionStarter]: For program point L29(lines 29 32) no Hoare annotation was computed. [2018-12-09 08:11:07,438 INFO L448 ceAbstractionStarter]: For program point __fpclassify_floatFINAL(lines 12 33) no Hoare annotation was computed. [2018-12-09 08:11:07,438 INFO L448 ceAbstractionStarter]: For program point L23(lines 23 32) no Hoare annotation was computed. [2018-12-09 08:11:07,438 INFO L448 ceAbstractionStarter]: For program point L15-1(lines 15 19) no Hoare annotation was computed. [2018-12-09 08:11:07,438 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 08:11:07,438 INFO L448 ceAbstractionStarter]: For program point L15-3(lines 12 33) no Hoare annotation was computed. [2018-12-09 08:11:07,438 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 32) no Hoare annotation was computed. [2018-12-09 08:11:07,438 INFO L451 ceAbstractionStarter]: At program point __fpclassify_floatENTRY(lines 12 33) the Hoare annotation is: true [2018-12-09 08:11:07,438 INFO L448 ceAbstractionStarter]: For program point __fpclassify_floatEXIT(lines 12 33) no Hoare annotation was computed. [2018-12-09 08:11:07,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:11:07 BoogieIcfgContainer [2018-12-09 08:11:07,446 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 08:11:07,446 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 08:11:07,446 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 08:11:07,446 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 08:11:07,446 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:10:45" (3/4) ... [2018-12-09 08:11:07,448 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 08:11:07,452 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2018-12-09 08:11:07,452 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fmin_float [2018-12-09 08:11:07,453 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 08:11:07,453 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 08:11:07,453 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2018-12-09 08:11:07,456 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2018-12-09 08:11:07,456 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-12-09 08:11:07,456 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 08:11:07,473 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: x == \old(x) [2018-12-09 08:11:07,487 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_0692cce2-81d2-4d11-a06c-32618e687519/bin-2019/uautomizer/witness.graphml [2018-12-09 08:11:07,487 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 08:11:07,488 INFO L168 Benchmark]: Toolchain (without parser) took 22630.10 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 352.3 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -108.7 MB). Peak memory consumption was 243.7 MB. Max. memory is 11.5 GB. [2018-12-09 08:11:07,488 INFO L168 Benchmark]: CDTParser took 0.16 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 08:11:07,488 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.88 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 08:11:07,488 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.97 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 08:11:07,488 INFO L168 Benchmark]: Boogie Preprocessor took 19.93 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 08:11:07,489 INFO L168 Benchmark]: RCFGBuilder took 235.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 928.6 MB in the beginning and 1.1 GB in the end (delta: -172.1 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-12-09 08:11:07,489 INFO L168 Benchmark]: TraceAbstraction took 22167.90 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 221.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 37.2 MB). Peak memory consumption was 258.4 MB. Max. memory is 11.5 GB. [2018-12-09 08:11:07,489 INFO L168 Benchmark]: Witness Printer took 41.32 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 11.5 GB. [2018-12-09 08:11:07,490 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 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 146.88 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 15.97 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 19.93 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 235.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 928.6 MB in the beginning and 1.1 GB in the end (delta: -172.1 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 22167.90 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 221.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 37.2 MB). Peak memory consumption was 258.4 MB. Max. memory is 11.5 GB. * Witness Printer took 41.32 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 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, 22.1s OverallTime, 30 OverallIterations, 6 TraceHistogramMax, 11.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 2020 SDtfs, 977 SDslu, 10318 SDs, 0 SdLazy, 4685 SolverSat, 240 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 7.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2467 GetRequests, 2132 SyntacticMatches, 8 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 30 MinimizatonAttempts, 186 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 153 PreInvPairs, 175 NumberOfFragments, 161 HoareAnnotationTreeSize, 153 FomulaSimplifications, 783 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 19 FomulaSimplificationsInter, 69 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 8.9s InterpolantComputationTime, 1789 NumberOfCodeBlocks, 1789 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 2267 ConstructedInterpolants, 32 QuantifiedInterpolants, 431671 SizeOfPredicates, 142 NumberOfNonLiveVariables, 3861 ConjunctsInSsa, 318 ConjunctsInUnsatCore, 41 InterpolantComputations, 19 PerfectInterpolantSequences, 1034/1154 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...