./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/bitvector/soft_float_4_true-unreach-call_true-no-overflow_true-termination.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4_true-unreach-call_true-no-overflow_true-termination.c.cil.c -s /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/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 ee05cb2d66f71fb2277986b04bb223cfc634fed1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4_true-unreach-call_true-no-overflow_true-termination.c.cil.c -s /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/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 ee05cb2d66f71fb2277986b04bb223cfc634fed1 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 05:30:05,351 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 05:30:05,353 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 05:30:05,360 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 05:30:05,360 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 05:30:05,360 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 05:30:05,361 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 05:30:05,362 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 05:30:05,363 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 05:30:05,364 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 05:30:05,364 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 05:30:05,364 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 05:30:05,365 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 05:30:05,365 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 05:30:05,366 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 05:30:05,367 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 05:30:05,367 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 05:30:05,368 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 05:30:05,369 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 05:30:05,369 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 05:30:05,370 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 05:30:05,371 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 05:30:05,372 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 05:30:05,372 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 05:30:05,372 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 05:30:05,373 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 05:30:05,374 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 05:30:05,374 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 05:30:05,375 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 05:30:05,376 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 05:30:05,376 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 05:30:05,376 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 05:30:05,376 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 05:30:05,377 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 05:30:05,377 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 05:30:05,377 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 05:30:05,378 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 05:30:05,384 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 05:30:05,385 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 05:30:05,385 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 05:30:05,385 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 05:30:05,386 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 05:30:05,386 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 05:30:05,386 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 05:30:05,386 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 05:30:05,386 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 05:30:05,386 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 05:30:05,386 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 05:30:05,387 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 05:30:05,387 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 05:30:05,387 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 05:30:05,387 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 05:30:05,387 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 05:30:05,387 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 05:30:05,387 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 05:30:05,388 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 05:30:05,388 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 05:30:05,388 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 05:30:05,388 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 05:30:05,388 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 05:30:05,388 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 05:30:05,388 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 05:30:05,389 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 05:30:05,389 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 05:30:05,389 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 05:30:05,389 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 05:30:05,389 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_0da03f82-a285-4d37-a4ca-d02953022d8f/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 -> ee05cb2d66f71fb2277986b04bb223cfc634fed1 [2018-11-10 05:30:05,412 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 05:30:05,422 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 05:30:05,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 05:30:05,426 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 05:30:05,427 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 05:30:05,427 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/../../sv-benchmarks/c/bitvector/soft_float_4_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 05:30:05,475 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/data/0319fcd56/6001642516f64e968acaba61b1177800/FLAG7f1dfee72 [2018-11-10 05:30:05,813 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 05:30:05,813 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/sv-benchmarks/c/bitvector/soft_float_4_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 05:30:05,819 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/data/0319fcd56/6001642516f64e968acaba61b1177800/FLAG7f1dfee72 [2018-11-10 05:30:05,829 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/data/0319fcd56/6001642516f64e968acaba61b1177800 [2018-11-10 05:30:05,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 05:30:05,832 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 05:30:05,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 05:30:05,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 05:30:05,835 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 05:30:05,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:30:05" (1/1) ... [2018-11-10 05:30:05,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@144a1ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:05, skipping insertion in model container [2018-11-10 05:30:05,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:30:05" (1/1) ... [2018-11-10 05:30:05,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 05:30:05,863 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 05:30:05,997 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:30:06,000 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 05:30:06,024 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:30:06,033 INFO L193 MainTranslator]: Completed translation [2018-11-10 05:30:06,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:06 WrapperNode [2018-11-10 05:30:06,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 05:30:06,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 05:30:06,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 05:30:06,034 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 05:30:06,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:06" (1/1) ... [2018-11-10 05:30:06,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:06" (1/1) ... [2018-11-10 05:30:06,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:06" (1/1) ... [2018-11-10 05:30:06,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:06" (1/1) ... [2018-11-10 05:30:06,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:06" (1/1) ... [2018-11-10 05:30:06,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:06" (1/1) ... [2018-11-10 05:30:06,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:06" (1/1) ... [2018-11-10 05:30:06,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 05:30:06,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 05:30:06,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 05:30:06,060 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 05:30:06,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/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 [2018-11-10 05:30:06,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 05:30:06,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 05:30:06,134 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 05:30:06,135 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2018-11-10 05:30:06,135 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2018-11-10 05:30:06,135 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2018-11-10 05:30:06,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 05:30:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 05:30:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-11-10 05:30:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-11-10 05:30:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 05:30:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2018-11-10 05:30:06,136 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2018-11-10 05:30:06,136 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2018-11-10 05:30:06,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 05:30:06,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 05:30:06,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 05:30:06,376 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 05:30:06,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:30:06 BoogieIcfgContainer [2018-11-10 05:30:06,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 05:30:06,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 05:30:06,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 05:30:06,379 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 05:30:06,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 05:30:05" (1/3) ... [2018-11-10 05:30:06,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@667971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:30:06, skipping insertion in model container [2018-11-10 05:30:06,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:06" (2/3) ... [2018-11-10 05:30:06,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@667971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:30:06, skipping insertion in model container [2018-11-10 05:30:06,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:30:06" (3/3) ... [2018-11-10 05:30:06,382 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 05:30:06,388 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 05:30:06,393 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 05:30:06,402 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 05:30:06,425 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 05:30:06,425 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 05:30:06,425 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 05:30:06,426 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 05:30:06,426 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 05:30:06,426 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 05:30:06,426 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 05:30:06,426 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 05:30:06,426 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 05:30:06,439 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-11-10 05:30:06,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-10 05:30:06,444 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:06,444 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:30:06,446 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:06,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:06,450 INFO L82 PathProgramCache]: Analyzing trace with hash 171896770, now seen corresponding path program 1 times [2018-11-10 05:30:06,452 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:30:06,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:30:06,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:30:06,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:06,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:30:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 05:30:06,683 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:30:06,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 05:30:06,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 05:30:06,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 05:30:06,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-10 05:30:06,702 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 8 states. [2018-11-10 05:30:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:06,848 INFO L93 Difference]: Finished difference Result 131 states and 193 transitions. [2018-11-10 05:30:06,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 05:30:06,849 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2018-11-10 05:30:06,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:06,856 INFO L225 Difference]: With dead ends: 131 [2018-11-10 05:30:06,856 INFO L226 Difference]: Without dead ends: 71 [2018-11-10 05:30:06,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-10 05:30:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-10 05:30:06,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2018-11-10 05:30:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-10 05:30:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2018-11-10 05:30:06,890 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 34 [2018-11-10 05:30:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:06,891 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2018-11-10 05:30:06,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 05:30:06,891 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2018-11-10 05:30:06,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-10 05:30:06,893 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:06,893 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2018-11-10 05:30:06,893 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:06,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:06,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1637273788, now seen corresponding path program 1 times [2018-11-10 05:30:06,894 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:30:06,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:30:06,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:30:06,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:06,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:30:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 05:30:07,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:30:07,047 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:30:07,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:07,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 05:30:07,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:30:07,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2018-11-10 05:30:07,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 05:30:07,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 05:30:07,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-10 05:30:07,173 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 11 states. [2018-11-10 05:30:07,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:07,483 INFO L93 Difference]: Finished difference Result 177 states and 238 transitions. [2018-11-10 05:30:07,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 05:30:07,483 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2018-11-10 05:30:07,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:07,485 INFO L225 Difference]: With dead ends: 177 [2018-11-10 05:30:07,485 INFO L226 Difference]: Without dead ends: 119 [2018-11-10 05:30:07,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2018-11-10 05:30:07,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-10 05:30:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2018-11-10 05:30:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-10 05:30:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 116 transitions. [2018-11-10 05:30:07,502 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 116 transitions. Word has length 39 [2018-11-10 05:30:07,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:07,503 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 116 transitions. [2018-11-10 05:30:07,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 05:30:07,503 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2018-11-10 05:30:07,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-10 05:30:07,504 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:07,505 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2018-11-10 05:30:07,505 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:07,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:07,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1694532090, now seen corresponding path program 1 times [2018-11-10 05:30:07,506 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:30:07,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:30:07,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:30:07,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:07,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:30:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 05:30:07,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:30:07,658 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:30:07,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:07,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 05:30:07,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:30:07,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2018-11-10 05:30:07,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 05:30:07,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 05:30:07,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:30:07,749 INFO L87 Difference]: Start difference. First operand 87 states and 116 transitions. Second operand 12 states. [2018-11-10 05:30:07,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:07,994 INFO L93 Difference]: Finished difference Result 151 states and 200 transitions. [2018-11-10 05:30:07,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 05:30:07,995 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2018-11-10 05:30:07,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:07,998 INFO L225 Difference]: With dead ends: 151 [2018-11-10 05:30:07,998 INFO L226 Difference]: Without dead ends: 115 [2018-11-10 05:30:07,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2018-11-10 05:30:07,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-11-10 05:30:08,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 79. [2018-11-10 05:30:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-10 05:30:08,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2018-11-10 05:30:08,008 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 39 [2018-11-10 05:30:08,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:08,008 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2018-11-10 05:30:08,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 05:30:08,008 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2018-11-10 05:30:08,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-10 05:30:08,009 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:08,009 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2018-11-10 05:30:08,010 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:08,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:08,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1126781220, now seen corresponding path program 1 times [2018-11-10 05:30:08,010 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:30:08,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:30:08,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:30:08,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:08,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:30:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 05:30:08,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:30:08,106 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:30:08,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:08,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 05:30:08,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:30:08,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 14 [2018-11-10 05:30:08,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 05:30:08,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 05:30:08,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-10 05:30:08,228 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand 14 states. [2018-11-10 05:30:08,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:08,575 INFO L93 Difference]: Finished difference Result 177 states and 234 transitions. [2018-11-10 05:30:08,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-10 05:30:08,576 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2018-11-10 05:30:08,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:08,577 INFO L225 Difference]: With dead ends: 177 [2018-11-10 05:30:08,578 INFO L226 Difference]: Without dead ends: 155 [2018-11-10 05:30:08,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2018-11-10 05:30:08,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-11-10 05:30:08,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 111. [2018-11-10 05:30:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-11-10 05:30:08,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 141 transitions. [2018-11-10 05:30:08,593 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 141 transitions. Word has length 42 [2018-11-10 05:30:08,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:08,593 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 141 transitions. [2018-11-10 05:30:08,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 05:30:08,593 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 141 transitions. [2018-11-10 05:30:08,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-10 05:30:08,595 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:08,595 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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] [2018-11-10 05:30:08,596 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:08,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:08,596 INFO L82 PathProgramCache]: Analyzing trace with hash 172103726, now seen corresponding path program 2 times [2018-11-10 05:30:08,596 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:30:08,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:30:08,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:30:08,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:08,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:30:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 05:30:08,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:30:08,661 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:30:08,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:30:08,692 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:30:08,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:30:08,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 05:30:08,790 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 05:30:08,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 12 [2018-11-10 05:30:08,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 05:30:08,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 05:30:08,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:30:08,791 INFO L87 Difference]: Start difference. First operand 111 states and 141 transitions. Second operand 12 states. [2018-11-10 05:30:08,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:08,904 INFO L93 Difference]: Finished difference Result 196 states and 264 transitions. [2018-11-10 05:30:08,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 05:30:08,904 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2018-11-10 05:30:08,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:08,905 INFO L225 Difference]: With dead ends: 196 [2018-11-10 05:30:08,905 INFO L226 Difference]: Without dead ends: 170 [2018-11-10 05:30:08,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:30:08,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-11-10 05:30:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 148. [2018-11-10 05:30:08,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-11-10 05:30:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 196 transitions. [2018-11-10 05:30:08,918 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 196 transitions. Word has length 44 [2018-11-10 05:30:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:08,918 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 196 transitions. [2018-11-10 05:30:08,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 05:30:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 196 transitions. [2018-11-10 05:30:08,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-10 05:30:08,919 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:08,920 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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] [2018-11-10 05:30:08,920 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:08,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:08,920 INFO L82 PathProgramCache]: Analyzing trace with hash 229362028, now seen corresponding path program 2 times [2018-11-10 05:30:08,920 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:30:08,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:30:08,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:30:08,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:30:08,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:30:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 05:30:09,061 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:30:09,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2018-11-10 05:30:09,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 05:30:09,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 05:30:09,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-11-10 05:30:09,062 INFO L87 Difference]: Start difference. First operand 148 states and 196 transitions. Second operand 13 states. [2018-11-10 05:30:09,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:09,225 INFO L93 Difference]: Finished difference Result 170 states and 224 transitions. [2018-11-10 05:30:09,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 05:30:09,225 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2018-11-10 05:30:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:09,228 INFO L225 Difference]: With dead ends: 170 [2018-11-10 05:30:09,228 INFO L226 Difference]: Without dead ends: 168 [2018-11-10 05:30:09,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2018-11-10 05:30:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-11-10 05:30:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 152. [2018-11-10 05:30:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-11-10 05:30:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 199 transitions. [2018-11-10 05:30:09,244 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 199 transitions. Word has length 44 [2018-11-10 05:30:09,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:09,244 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 199 transitions. [2018-11-10 05:30:09,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 05:30:09,244 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 199 transitions. [2018-11-10 05:30:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-10 05:30:09,245 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:09,246 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2018-11-10 05:30:09,246 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:09,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:09,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1752794032, now seen corresponding path program 1 times [2018-11-10 05:30:09,246 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:30:09,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:30:09,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:30:09,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:30:09,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:30:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:30:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:30:09,281 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 05:30:09,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 05:30:09 BoogieIcfgContainer [2018-11-10 05:30:09,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 05:30:09,300 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 05:30:09,300 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 05:30:09,300 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 05:30:09,301 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:30:06" (3/4) ... [2018-11-10 05:30:09,303 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-10 05:30:09,303 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 05:30:09,304 INFO L168 Benchmark]: Toolchain (without parser) took 3472.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 214.4 MB). Free memory was 960.3 MB in the beginning and 1.0 GB in the end (delta: -58.7 MB). Peak memory consumption was 155.7 MB. Max. memory is 11.5 GB. [2018-11-10 05:30:09,304 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:30:09,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 200.77 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 945.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-11-10 05:30:09,305 INFO L168 Benchmark]: Boogie Preprocessor took 26.22 ms. Allocated memory is still 1.0 GB. Free memory was 945.8 MB in the beginning and 943.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 05:30:09,305 INFO L168 Benchmark]: RCFGBuilder took 316.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 943.1 MB in the beginning and 1.1 GB in the end (delta: -174.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. [2018-11-10 05:30:09,306 INFO L168 Benchmark]: TraceAbstraction took 2922.30 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.2 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 95.3 MB). Peak memory consumption was 164.5 MB. Max. memory is 11.5 GB. [2018-11-10 05:30:09,306 INFO L168 Benchmark]: Witness Printer took 3.11 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:30:09,308 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 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 200.77 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 945.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.22 ms. Allocated memory is still 1.0 GB. Free memory was 945.8 MB in the beginning and 943.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 316.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 943.1 MB in the beginning and 1.1 GB in the end (delta: -174.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2922.30 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.2 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 95.3 MB). Peak memory consumption was 164.5 MB. Max. memory is 11.5 GB. * Witness Printer took 3.11 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 100, overapproximation of bitwiseAnd at line 98. Possible FailurePath: [L215] unsigned int a ; [L216] unsigned int ma = __VERIFIER_nondet_uint(); [L217] signed char ea = __VERIFIER_nondet_char(); [L218] unsigned int b ; [L219] unsigned int mb = __VERIFIER_nondet_uint(); [L220] signed char eb = __VERIFIER_nondet_char(); [L221] unsigned int r_add1 ; [L222] unsigned int r_add2 ; [L223] unsigned int zero ; [L224] int tmp ; [L225] int tmp___0 ; [L226] int __retres14 ; VAL [ea=127, eb=0, ma=33554432, mb=16777216] [L230] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L19] COND TRUE ! m [L20] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L70] RET return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L230] EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=0, ma=33554432, mb=16777216] [L230] zero = base2flt(0, 0) [L231] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=33554432] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L19] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L25] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L47] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L49] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L54] COND TRUE e >= 127 [L55] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L70] RET return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, __retres4=4294967295, e=127, m=33554432] [L231] EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967295, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L231] a = base2flt(ma, ea) [L232] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=0, \old(m)=16777216] [L15] unsigned int res ; [L16] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L19] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L25] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L47] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L49] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L66] m = m & ~ (1U << 24U) [L67] res = m | (unsigned int )((e + 128) << 24U) [L68] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=4278190080, e=0, res=4278190080] [L70] RET return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=36028797002186752, __retres4=4278190080, e=0, res=4278190080] [L232] EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=36028797002186752, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L232] b = base2flt(mb, eb) [L233] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=4278190080] [L74] unsigned int res ; [L75] unsigned int ma ; [L76] unsigned int mb ; [L77] unsigned int delta ; [L78] int ea ; [L79] int eb ; [L80] unsigned int tmp ; [L81] unsigned int __retres10 ; VAL [\old(a)=4294967295, \old(b)=4278190080, a=4294967295, b=4278190080] [L84] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=4278190080, a=4294967295, b=4278190080] [L91] COND FALSE !(! b) [L98] ma = a & ((1U << 24U) - 1U) [L99] ea = (int )(a >> 24U) - 128 [L100] ma = ma | (1U << 24U) [L101] mb = b & ((1U << 24U) - 1U) [L102] eb = (int )(b >> 24U) - 128 [L103] mb = mb | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=4278190080, a=4294967295, b=4278190080, ea=127, eb=2147483519] [L104] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. UNSAFE Result, 2.8s OverallTime, 7 OverallIterations, 3 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 504 SDtfs, 352 SDslu, 4195 SDs, 0 SdLazy, 1278 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 259 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=152occurred in iteration=6, 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, 6 MinimizatonAttempts, 157 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 450 NumberOfCodeBlocks, 450 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 396 ConstructedInterpolants, 1 QuantifiedInterpolants, 44452 SizeOfPredicates, 19 NumberOfNonLiveVariables, 496 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 129/171 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-1dbac8b [2018-11-10 05:30:10,759 INFO L170 SettingsManager]: Resetting all preferences to default values... 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[2018-11-10 05:30:10,785 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 05:30:10,785 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 05:30:10,786 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 05:30:10,787 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 05:30:10,788 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 05:30:10,788 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 05:30:10,789 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 05:30:10,789 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 05:30:10,789 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 05:30:10,790 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 05:30:10,790 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 05:30:10,790 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 05:30:10,791 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 05:30:10,792 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-11-10 05:30:10,801 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 05:30:10,802 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 05:30:10,802 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 05:30:10,802 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 05:30:10,803 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 05:30:10,803 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 05:30:10,803 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 05:30:10,803 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 05:30:10,804 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 05:30:10,804 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 05:30:10,804 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 05:30:10,804 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 05:30:10,804 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 05:30:10,804 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 05:30:10,804 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-10 05:30:10,804 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-10 05:30:10,805 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 05:30:10,805 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 05:30:10,805 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 05:30:10,805 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 05:30:10,805 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 05:30:10,805 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 05:30:10,805 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 05:30:10,806 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 05:30:10,806 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 05:30:10,806 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 05:30:10,806 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 05:30:10,806 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-11-10 05:30:10,806 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 05:30:10,806 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-10 05:30:10,806 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-10 05:30:10,807 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_0da03f82-a285-4d37-a4ca-d02953022d8f/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 -> ee05cb2d66f71fb2277986b04bb223cfc634fed1 [2018-11-10 05:30:10,838 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 05:30:10,847 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 05:30:10,850 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 05:30:10,851 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 05:30:10,852 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 05:30:10,852 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/../../sv-benchmarks/c/bitvector/soft_float_4_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 05:30:10,898 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/data/774371805/58042aa84b3b4d16ac00a2334049f49c/FLAG98bc3954b [2018-11-10 05:30:11,306 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 05:30:11,306 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/sv-benchmarks/c/bitvector/soft_float_4_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 05:30:11,311 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/data/774371805/58042aa84b3b4d16ac00a2334049f49c/FLAG98bc3954b [2018-11-10 05:30:11,319 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/data/774371805/58042aa84b3b4d16ac00a2334049f49c [2018-11-10 05:30:11,321 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 05:30:11,321 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 05:30:11,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 05:30:11,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 05:30:11,325 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 05:30:11,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:30:11" (1/1) ... [2018-11-10 05:30:11,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d68c770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:11, skipping insertion in model container [2018-11-10 05:30:11,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:30:11" (1/1) ... [2018-11-10 05:30:11,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 05:30:11,356 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 05:30:11,507 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:30:11,509 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 05:30:11,541 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:30:11,551 INFO L193 MainTranslator]: Completed translation [2018-11-10 05:30:11,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:11 WrapperNode [2018-11-10 05:30:11,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 05:30:11,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 05:30:11,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 05:30:11,552 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 05:30:11,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:11" (1/1) ... [2018-11-10 05:30:11,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:11" (1/1) ... [2018-11-10 05:30:11,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:11" (1/1) ... [2018-11-10 05:30:11,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:11" (1/1) ... [2018-11-10 05:30:11,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:11" (1/1) ... [2018-11-10 05:30:11,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:11" (1/1) ... [2018-11-10 05:30:11,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:11" (1/1) ... [2018-11-10 05:30:11,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 05:30:11,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 05:30:11,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 05:30:11,580 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 05:30:11,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/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 [2018-11-10 05:30:11,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 05:30:11,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 05:30:11,663 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 05:30:11,664 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2018-11-10 05:30:11,664 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2018-11-10 05:30:11,664 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2018-11-10 05:30:11,664 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 05:30:11,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 05:30:11,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-11-10 05:30:11,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-11-10 05:30:11,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 05:30:11,665 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2018-11-10 05:30:11,665 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2018-11-10 05:30:11,665 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2018-11-10 05:30:11,665 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 05:30:11,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 05:30:11,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 05:30:11,934 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 05:30:11,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:30:11 BoogieIcfgContainer [2018-11-10 05:30:11,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 05:30:11,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 05:30:11,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 05:30:11,937 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 05:30:11,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 05:30:11" (1/3) ... [2018-11-10 05:30:11,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b1311f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:30:11, skipping insertion in model container [2018-11-10 05:30:11,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:30:11" (2/3) ... [2018-11-10 05:30:11,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b1311f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:30:11, skipping insertion in model container [2018-11-10 05:30:11,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:30:11" (3/3) ... [2018-11-10 05:30:11,940 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 05:30:11,945 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 05:30:11,949 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 05:30:11,957 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 05:30:11,974 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 05:30:11,975 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 05:30:11,975 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 05:30:11,975 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 05:30:11,975 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 05:30:11,975 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 05:30:11,975 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 05:30:11,976 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 05:30:11,976 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 05:30:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-11-10 05:30:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-10 05:30:11,991 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:11,992 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:30:11,993 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:11,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:11,996 INFO L82 PathProgramCache]: Analyzing trace with hash 171896770, now seen corresponding path program 1 times [2018-11-10 05:30:11,998 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:11,999 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:12,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:12,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 05:30:12,158 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:30:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 05:30:12,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:30:12,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-10 05:30:12,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 05:30:12,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 05:30:12,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-10 05:30:12,220 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 9 states. [2018-11-10 05:30:12,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:12,390 INFO L93 Difference]: Finished difference Result 140 states and 208 transitions. [2018-11-10 05:30:12,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:30:12,391 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2018-11-10 05:30:12,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:12,398 INFO L225 Difference]: With dead ends: 140 [2018-11-10 05:30:12,398 INFO L226 Difference]: Without dead ends: 80 [2018-11-10 05:30:12,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-11-10 05:30:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-11-10 05:30:12,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2018-11-10 05:30:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-10 05:30:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 88 transitions. [2018-11-10 05:30:12,431 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 88 transitions. Word has length 34 [2018-11-10 05:30:12,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:12,431 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 88 transitions. [2018-11-10 05:30:12,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 05:30:12,432 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 88 transitions. [2018-11-10 05:30:12,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-10 05:30:12,433 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:12,433 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2018-11-10 05:30:12,434 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:12,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:12,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1531098864, now seen corresponding path program 1 times [2018-11-10 05:30:12,434 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:12,435 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:12,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:12,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 05:30:12,558 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:30:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 05:30:12,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:30:12,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-10 05:30:12,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 05:30:12,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 05:30:12,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-10 05:30:12,649 INFO L87 Difference]: Start difference. First operand 66 states and 88 transitions. Second operand 8 states. [2018-11-10 05:30:12,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:12,764 INFO L93 Difference]: Finished difference Result 119 states and 166 transitions. [2018-11-10 05:30:12,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 05:30:12,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2018-11-10 05:30:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:12,768 INFO L225 Difference]: With dead ends: 119 [2018-11-10 05:30:12,768 INFO L226 Difference]: Without dead ends: 93 [2018-11-10 05:30:12,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-10 05:30:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-10 05:30:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2018-11-10 05:30:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-11-10 05:30:12,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 120 transitions. [2018-11-10 05:30:12,782 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 120 transitions. Word has length 39 [2018-11-10 05:30:12,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:12,782 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 120 transitions. [2018-11-10 05:30:12,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 05:30:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 120 transitions. [2018-11-10 05:30:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-10 05:30:12,785 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:12,785 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2018-11-10 05:30:12,785 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:12,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:12,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1473840562, now seen corresponding path program 1 times [2018-11-10 05:30:12,786 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:12,786 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:12,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:12,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 05:30:12,875 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:30:12,879 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:30:12,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 05:30:12,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 05:30:12,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 05:30:12,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-10 05:30:12,880 INFO L87 Difference]: Start difference. First operand 86 states and 120 transitions. Second operand 8 states. [2018-11-10 05:30:12,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:12,966 INFO L93 Difference]: Finished difference Result 163 states and 220 transitions. [2018-11-10 05:30:12,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 05:30:12,971 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2018-11-10 05:30:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:12,973 INFO L225 Difference]: With dead ends: 163 [2018-11-10 05:30:12,973 INFO L226 Difference]: Without dead ends: 123 [2018-11-10 05:30:12,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-10 05:30:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-11-10 05:30:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2018-11-10 05:30:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-10 05:30:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 128 transitions. [2018-11-10 05:30:12,989 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 128 transitions. Word has length 39 [2018-11-10 05:30:12,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:12,989 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 128 transitions. [2018-11-10 05:30:12,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 05:30:12,990 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 128 transitions. [2018-11-10 05:30:12,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-10 05:30:12,992 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:12,992 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2018-11-10 05:30:12,992 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:12,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:12,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1126781220, now seen corresponding path program 1 times [2018-11-10 05:30:12,993 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:12,993 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:13,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:13,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 05:30:13,128 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:30:13,129 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:30:13,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-11-10 05:30:13,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 05:30:13,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 05:30:13,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-10 05:30:13,130 INFO L87 Difference]: Start difference. First operand 94 states and 128 transitions. Second operand 9 states. [2018-11-10 05:30:13,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:13,233 INFO L93 Difference]: Finished difference Result 138 states and 184 transitions. [2018-11-10 05:30:13,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:30:13,234 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2018-11-10 05:30:13,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:13,234 INFO L225 Difference]: With dead ends: 138 [2018-11-10 05:30:13,235 INFO L226 Difference]: Without dead ends: 117 [2018-11-10 05:30:13,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-11-10 05:30:13,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-11-10 05:30:13,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 102. [2018-11-10 05:30:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-11-10 05:30:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 137 transitions. [2018-11-10 05:30:13,248 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 137 transitions. Word has length 42 [2018-11-10 05:30:13,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:13,248 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 137 transitions. [2018-11-10 05:30:13,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 05:30:13,248 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 137 transitions. [2018-11-10 05:30:13,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-10 05:30:13,250 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:13,251 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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] [2018-11-10 05:30:13,251 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:13,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:13,251 INFO L82 PathProgramCache]: Analyzing trace with hash 229362028, now seen corresponding path program 2 times [2018-11-10 05:30:13,252 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:13,252 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:13,264 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 05:30:13,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-11-10 05:30:13,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:30:13,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 05:30:13,385 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:30:13,391 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:30:13,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 05:30:13,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 05:30:13,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 05:30:13,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:30:13,392 INFO L87 Difference]: Start difference. First operand 102 states and 137 transitions. Second operand 12 states. [2018-11-10 05:30:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:13,635 INFO L93 Difference]: Finished difference Result 197 states and 265 transitions. [2018-11-10 05:30:13,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 05:30:13,635 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2018-11-10 05:30:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:13,636 INFO L225 Difference]: With dead ends: 197 [2018-11-10 05:30:13,637 INFO L226 Difference]: Without dead ends: 162 [2018-11-10 05:30:13,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2018-11-10 05:30:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-11-10 05:30:13,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 150. [2018-11-10 05:30:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-11-10 05:30:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 198 transitions. [2018-11-10 05:30:13,652 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 198 transitions. Word has length 44 [2018-11-10 05:30:13,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:13,653 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 198 transitions. [2018-11-10 05:30:13,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 05:30:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 198 transitions. [2018-11-10 05:30:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-10 05:30:13,654 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:13,654 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2018-11-10 05:30:13,654 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:13,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:13,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1752794032, now seen corresponding path program 1 times [2018-11-10 05:30:13,655 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:13,655 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:13,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:30:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:13,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-10 05:30:13,763 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:30:13,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:30:13,931 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:30:13,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:13,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-10 05:30:13,961 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:30:13,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:30:13,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-10 05:30:13,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 05:30:13,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 05:30:13,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2018-11-10 05:30:13,985 INFO L87 Difference]: Start difference. First operand 150 states and 198 transitions. Second operand 11 states. [2018-11-10 05:30:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:14,214 INFO L93 Difference]: Finished difference Result 209 states and 269 transitions. [2018-11-10 05:30:14,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:30:14,215 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2018-11-10 05:30:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:14,216 INFO L225 Difference]: With dead ends: 209 [2018-11-10 05:30:14,216 INFO L226 Difference]: Without dead ends: 178 [2018-11-10 05:30:14,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2018-11-10 05:30:14,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-11-10 05:30:14,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 158. [2018-11-10 05:30:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-11-10 05:30:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 203 transitions. [2018-11-10 05:30:14,233 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 203 transitions. Word has length 44 [2018-11-10 05:30:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:14,233 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 203 transitions. [2018-11-10 05:30:14,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 05:30:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 203 transitions. [2018-11-10 05:30:14,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-10 05:30:14,234 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:14,234 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2018-11-10 05:30:14,234 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:14,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:14,235 INFO L82 PathProgramCache]: Analyzing trace with hash 655789170, now seen corresponding path program 1 times [2018-11-10 05:30:14,236 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:14,236 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:14,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:14,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-10 05:30:14,363 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:30:14,365 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:30:14,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 05:30:14,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 05:30:14,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 05:30:14,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:30:14,365 INFO L87 Difference]: Start difference. First operand 158 states and 203 transitions. Second operand 12 states. [2018-11-10 05:30:14,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:14,633 INFO L93 Difference]: Finished difference Result 208 states and 266 transitions. [2018-11-10 05:30:14,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-10 05:30:14,633 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2018-11-10 05:30:14,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:14,635 INFO L225 Difference]: With dead ends: 208 [2018-11-10 05:30:14,635 INFO L226 Difference]: Without dead ends: 177 [2018-11-10 05:30:14,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2018-11-10 05:30:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-11-10 05:30:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 153. [2018-11-10 05:30:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-11-10 05:30:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 194 transitions. [2018-11-10 05:30:14,648 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 194 transitions. Word has length 44 [2018-11-10 05:30:14,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:14,648 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 194 transitions. [2018-11-10 05:30:14,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 05:30:14,649 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 194 transitions. [2018-11-10 05:30:14,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-10 05:30:14,649 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:14,649 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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] [2018-11-10 05:30:14,650 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:14,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:14,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2115746122, now seen corresponding path program 1 times [2018-11-10 05:30:14,650 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:14,650 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:14,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:14,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 05:30:14,759 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:30:14,761 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:30:14,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 05:30:14,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 05:30:14,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 05:30:14,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 05:30:14,761 INFO L87 Difference]: Start difference. First operand 153 states and 194 transitions. Second operand 6 states. [2018-11-10 05:30:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:15,932 INFO L93 Difference]: Finished difference Result 198 states and 249 transitions. [2018-11-10 05:30:15,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 05:30:15,932 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2018-11-10 05:30:15,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:15,933 INFO L225 Difference]: With dead ends: 198 [2018-11-10 05:30:15,933 INFO L226 Difference]: Without dead ends: 196 [2018-11-10 05:30:15,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-10 05:30:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-11-10 05:30:15,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 159. [2018-11-10 05:30:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-11-10 05:30:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 201 transitions. [2018-11-10 05:30:15,948 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 201 transitions. Word has length 44 [2018-11-10 05:30:15,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:15,949 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 201 transitions. [2018-11-10 05:30:15,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 05:30:15,949 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 201 transitions. [2018-11-10 05:30:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-10 05:30:15,950 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:15,950 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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] [2018-11-10 05:30:15,950 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:15,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:15,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2058487820, now seen corresponding path program 1 times [2018-11-10 05:30:15,950 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:15,950 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:15,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:15,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 05:30:16,027 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:30:16,028 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:30:16,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 05:30:16,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 05:30:16,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 05:30:16,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 05:30:16,029 INFO L87 Difference]: Start difference. First operand 159 states and 201 transitions. Second operand 6 states. [2018-11-10 05:30:18,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:18,164 INFO L93 Difference]: Finished difference Result 176 states and 219 transitions. [2018-11-10 05:30:18,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 05:30:18,165 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2018-11-10 05:30:18,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:18,165 INFO L225 Difference]: With dead ends: 176 [2018-11-10 05:30:18,166 INFO L226 Difference]: Without dead ends: 174 [2018-11-10 05:30:18,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-10 05:30:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-11-10 05:30:18,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 157. [2018-11-10 05:30:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-11-10 05:30:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 197 transitions. [2018-11-10 05:30:18,181 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 197 transitions. Word has length 44 [2018-11-10 05:30:18,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:18,181 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 197 transitions. [2018-11-10 05:30:18,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 05:30:18,181 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 197 transitions. [2018-11-10 05:30:18,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-10 05:30:18,182 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:18,182 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2018-11-10 05:30:18,183 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:18,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:18,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1471549843, now seen corresponding path program 1 times [2018-11-10 05:30:18,183 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:18,183 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:18,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:18,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 05:30:18,275 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:30:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 05:30:18,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:30:18,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-11-10 05:30:18,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 05:30:18,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 05:30:18,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-10 05:30:18,346 INFO L87 Difference]: Start difference. First operand 157 states and 197 transitions. Second operand 10 states. [2018-11-10 05:30:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:18,565 INFO L93 Difference]: Finished difference Result 214 states and 275 transitions. [2018-11-10 05:30:18,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 05:30:18,566 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2018-11-10 05:30:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:18,567 INFO L225 Difference]: With dead ends: 214 [2018-11-10 05:30:18,568 INFO L226 Difference]: Without dead ends: 203 [2018-11-10 05:30:18,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:30:18,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-11-10 05:30:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 171. [2018-11-10 05:30:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-11-10 05:30:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 216 transitions. [2018-11-10 05:30:18,588 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 216 transitions. Word has length 47 [2018-11-10 05:30:18,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:18,589 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 216 transitions. [2018-11-10 05:30:18,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 05:30:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 216 transitions. [2018-11-10 05:30:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-10 05:30:18,590 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:18,590 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2018-11-10 05:30:18,590 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:18,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:18,590 INFO L82 PathProgramCache]: Analyzing trace with hash -770485265, now seen corresponding path program 1 times [2018-11-10 05:30:18,590 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:18,590 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:18,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:18,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-10 05:30:18,690 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:30:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-10 05:30:18,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:30:18,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2018-11-10 05:30:18,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 05:30:18,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 05:30:18,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-11-10 05:30:18,811 INFO L87 Difference]: Start difference. First operand 171 states and 216 transitions. Second operand 14 states. [2018-11-10 05:30:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:19,049 INFO L93 Difference]: Finished difference Result 237 states and 303 transitions. [2018-11-10 05:30:19,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:30:19,049 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2018-11-10 05:30:19,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:19,051 INFO L225 Difference]: With dead ends: 237 [2018-11-10 05:30:19,051 INFO L226 Difference]: Without dead ends: 230 [2018-11-10 05:30:19,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2018-11-10 05:30:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-11-10 05:30:19,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 190. [2018-11-10 05:30:19,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-11-10 05:30:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 242 transitions. [2018-11-10 05:30:19,074 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 242 transitions. Word has length 47 [2018-11-10 05:30:19,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:19,074 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 242 transitions. [2018-11-10 05:30:19,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 05:30:19,074 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 242 transitions. [2018-11-10 05:30:19,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 05:30:19,075 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:19,075 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2018-11-10 05:30:19,075 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:19,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:19,076 INFO L82 PathProgramCache]: Analyzing trace with hash -2019685995, now seen corresponding path program 1 times [2018-11-10 05:30:19,076 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:19,076 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:19,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:19,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-10 05:30:19,185 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:30:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-10 05:30:19,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:30:19,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-11-10 05:30:19,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 05:30:19,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 05:30:19,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2018-11-10 05:30:19,321 INFO L87 Difference]: Start difference. First operand 190 states and 242 transitions. Second operand 16 states. [2018-11-10 05:30:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:19,964 INFO L93 Difference]: Finished difference Result 246 states and 317 transitions. [2018-11-10 05:30:19,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 05:30:19,965 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2018-11-10 05:30:19,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:19,966 INFO L225 Difference]: With dead ends: 246 [2018-11-10 05:30:19,966 INFO L226 Difference]: Without dead ends: 238 [2018-11-10 05:30:19,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2018-11-10 05:30:19,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-11-10 05:30:19,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 209. [2018-11-10 05:30:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-11-10 05:30:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 267 transitions. [2018-11-10 05:30:19,985 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 267 transitions. Word has length 49 [2018-11-10 05:30:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:19,985 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 267 transitions. [2018-11-10 05:30:19,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 05:30:19,985 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 267 transitions. [2018-11-10 05:30:19,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 05:30:19,986 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:19,986 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2018-11-10 05:30:19,987 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:19,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:19,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1962427693, now seen corresponding path program 1 times [2018-11-10 05:30:19,987 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:19,987 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:20,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:20,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 05:30:20,092 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:30:20,093 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:30:20,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 05:30:20,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 05:30:20,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 05:30:20,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 05:30:20,094 INFO L87 Difference]: Start difference. First operand 209 states and 267 transitions. Second operand 6 states. [2018-11-10 05:30:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:20,150 INFO L93 Difference]: Finished difference Result 217 states and 274 transitions. [2018-11-10 05:30:20,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 05:30:20,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2018-11-10 05:30:20,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:20,156 INFO L225 Difference]: With dead ends: 217 [2018-11-10 05:30:20,157 INFO L226 Difference]: Without dead ends: 198 [2018-11-10 05:30:20,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-10 05:30:20,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-11-10 05:30:20,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-11-10 05:30:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-11-10 05:30:20,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 248 transitions. [2018-11-10 05:30:20,177 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 248 transitions. Word has length 49 [2018-11-10 05:30:20,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:20,178 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 248 transitions. [2018-11-10 05:30:20,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 05:30:20,178 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 248 transitions. [2018-11-10 05:30:20,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-10 05:30:20,179 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:20,179 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2018-11-10 05:30:20,179 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:20,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:20,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1741264307, now seen corresponding path program 1 times [2018-11-10 05:30:20,180 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:20,180 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:20,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:20,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 05:30:20,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:30:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 05:30:20,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:30:20,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-11-10 05:30:20,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 05:30:20,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 05:30:20,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-11-10 05:30:20,421 INFO L87 Difference]: Start difference. First operand 198 states and 248 transitions. Second operand 16 states. [2018-11-10 05:30:20,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:20,851 INFO L93 Difference]: Finished difference Result 263 states and 353 transitions. [2018-11-10 05:30:20,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 05:30:20,852 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2018-11-10 05:30:20,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:20,853 INFO L225 Difference]: With dead ends: 263 [2018-11-10 05:30:20,853 INFO L226 Difference]: Without dead ends: 254 [2018-11-10 05:30:20,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2018-11-10 05:30:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-11-10 05:30:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 210. [2018-11-10 05:30:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-11-10 05:30:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 266 transitions. [2018-11-10 05:30:20,869 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 266 transitions. Word has length 52 [2018-11-10 05:30:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:20,869 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 266 transitions. [2018-11-10 05:30:20,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 05:30:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 266 transitions. [2018-11-10 05:30:20,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-10 05:30:20,870 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:20,870 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2018-11-10 05:30:20,870 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:20,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:20,871 INFO L82 PathProgramCache]: Analyzing trace with hash -444356113, now seen corresponding path program 1 times [2018-11-10 05:30:20,872 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:20,872 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:20,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:20,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-10 05:30:20,999 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:30:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-10 05:30:21,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:30:21,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2018-11-10 05:30:21,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-10 05:30:21,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-10 05:30:21,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-11-10 05:30:21,257 INFO L87 Difference]: Start difference. First operand 210 states and 266 transitions. Second operand 24 states. [2018-11-10 05:30:22,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:22,044 INFO L93 Difference]: Finished difference Result 280 states and 385 transitions. [2018-11-10 05:30:22,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-10 05:30:22,044 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2018-11-10 05:30:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:22,045 INFO L225 Difference]: With dead ends: 280 [2018-11-10 05:30:22,045 INFO L226 Difference]: Without dead ends: 265 [2018-11-10 05:30:22,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2018-11-10 05:30:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-11-10 05:30:22,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 213. [2018-11-10 05:30:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-11-10 05:30:22,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 283 transitions. [2018-11-10 05:30:22,076 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 283 transitions. Word has length 52 [2018-11-10 05:30:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:22,077 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 283 transitions. [2018-11-10 05:30:22,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-10 05:30:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 283 transitions. [2018-11-10 05:30:22,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-10 05:30:22,078 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:22,078 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2018-11-10 05:30:22,078 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:22,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:22,078 INFO L82 PathProgramCache]: Analyzing trace with hash 2000135135, now seen corresponding path program 2 times [2018-11-10 05:30:22,079 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:22,079 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:22,102 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 05:30:22,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:30:22,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:30:22,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 05:30:22,200 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:30:22,358 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 05:30:22,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:30:22,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2018-11-10 05:30:22,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 05:30:22,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 05:30:22,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2018-11-10 05:30:22,361 INFO L87 Difference]: Start difference. First operand 213 states and 283 transitions. Second operand 14 states. [2018-11-10 05:30:22,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:22,734 INFO L93 Difference]: Finished difference Result 270 states and 395 transitions. [2018-11-10 05:30:22,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 05:30:22,735 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2018-11-10 05:30:22,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:22,737 INFO L225 Difference]: With dead ends: 270 [2018-11-10 05:30:22,737 INFO L226 Difference]: Without dead ends: 263 [2018-11-10 05:30:22,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2018-11-10 05:30:22,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-11-10 05:30:22,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 217. [2018-11-10 05:30:22,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-11-10 05:30:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 289 transitions. [2018-11-10 05:30:22,767 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 289 transitions. Word has length 52 [2018-11-10 05:30:22,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:22,767 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 289 transitions. [2018-11-10 05:30:22,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 05:30:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 289 transitions. [2018-11-10 05:30:22,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-10 05:30:22,768 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:22,769 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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] [2018-11-10 05:30:22,769 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:22,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:22,769 INFO L82 PathProgramCache]: Analyzing trace with hash 849762505, now seen corresponding path program 1 times [2018-11-10 05:30:22,769 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:22,769 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:22,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:30:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:22,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 05:30:22,954 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:30:22,955 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:30:22,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2018-11-10 05:30:22,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 05:30:22,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 05:30:22,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-11-10 05:30:22,956 INFO L87 Difference]: Start difference. First operand 217 states and 289 transitions. Second operand 13 states. [2018-11-10 05:30:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:23,173 INFO L93 Difference]: Finished difference Result 303 states and 415 transitions. [2018-11-10 05:30:23,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 05:30:23,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2018-11-10 05:30:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:23,175 INFO L225 Difference]: With dead ends: 303 [2018-11-10 05:30:23,175 INFO L226 Difference]: Without dead ends: 245 [2018-11-10 05:30:23,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-11-10 05:30:23,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-11-10 05:30:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 224. [2018-11-10 05:30:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-11-10 05:30:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 296 transitions. [2018-11-10 05:30:23,193 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 296 transitions. Word has length 52 [2018-11-10 05:30:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:23,194 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 296 transitions. [2018-11-10 05:30:23,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 05:30:23,194 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 296 transitions. [2018-11-10 05:30:23,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-10 05:30:23,195 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:23,195 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2018-11-10 05:30:23,195 INFO L424 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:23,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:23,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1958244595, now seen corresponding path program 1 times [2018-11-10 05:30:23,195 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:23,195 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:23,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:23,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-10 05:30:23,327 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:30:23,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:30:23,435 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:30:23,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:23,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-10 05:30:23,463 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:30:23,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:30:23,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-10 05:30:23,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 05:30:23,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 05:30:23,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-11-10 05:30:23,551 INFO L87 Difference]: Start difference. First operand 224 states and 296 transitions. Second operand 11 states. [2018-11-10 05:30:25,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:25,460 INFO L93 Difference]: Finished difference Result 288 states and 377 transitions. [2018-11-10 05:30:25,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:30:25,461 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2018-11-10 05:30:25,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:25,462 INFO L225 Difference]: With dead ends: 288 [2018-11-10 05:30:25,462 INFO L226 Difference]: Without dead ends: 237 [2018-11-10 05:30:25,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-10 05:30:25,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-11-10 05:30:25,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 225. [2018-11-10 05:30:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-11-10 05:30:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 294 transitions. [2018-11-10 05:30:25,478 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 294 transitions. Word has length 52 [2018-11-10 05:30:25,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:25,479 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 294 transitions. [2018-11-10 05:30:25,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 05:30:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 294 transitions. [2018-11-10 05:30:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-10 05:30:25,480 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:25,480 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2018-11-10 05:30:25,480 INFO L424 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:25,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:25,480 INFO L82 PathProgramCache]: Analyzing trace with hash -461007837, now seen corresponding path program 2 times [2018-11-10 05:30:25,480 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:25,480 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:25,493 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 05:30:25,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:30:25,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:30:25,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-10 05:30:25,583 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:30:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-10 05:30:25,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:30:25,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2018-11-10 05:30:25,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-10 05:30:25,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-10 05:30:25,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-11-10 05:30:25,843 INFO L87 Difference]: Start difference. First operand 225 states and 294 transitions. Second operand 24 states. [2018-11-10 05:30:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:26,789 INFO L93 Difference]: Finished difference Result 286 states and 377 transitions. [2018-11-10 05:30:26,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-10 05:30:26,790 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2018-11-10 05:30:26,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:26,790 INFO L225 Difference]: With dead ends: 286 [2018-11-10 05:30:26,790 INFO L226 Difference]: Without dead ends: 247 [2018-11-10 05:30:26,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2018-11-10 05:30:26,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-11-10 05:30:26,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 199. [2018-11-10 05:30:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-11-10 05:30:26,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 263 transitions. [2018-11-10 05:30:26,807 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 263 transitions. Word has length 52 [2018-11-10 05:30:26,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:26,808 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 263 transitions. [2018-11-10 05:30:26,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-10 05:30:26,808 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 263 transitions. [2018-11-10 05:30:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-10 05:30:26,809 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:26,809 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2018-11-10 05:30:26,809 INFO L424 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:26,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:26,809 INFO L82 PathProgramCache]: Analyzing trace with hash -600263217, now seen corresponding path program 1 times [2018-11-10 05:30:26,809 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:26,809 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:26,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:30:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:26,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-10 05:30:26,961 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:30:26,962 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:30:26,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 05:30:26,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 05:30:26,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 05:30:26,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:30:26,963 INFO L87 Difference]: Start difference. First operand 199 states and 263 transitions. Second operand 12 states. [2018-11-10 05:30:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:28,060 INFO L93 Difference]: Finished difference Result 264 states and 346 transitions. [2018-11-10 05:30:28,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 05:30:28,062 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-11-10 05:30:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:28,063 INFO L225 Difference]: With dead ends: 264 [2018-11-10 05:30:28,063 INFO L226 Difference]: Without dead ends: 213 [2018-11-10 05:30:28,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2018-11-10 05:30:28,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-11-10 05:30:28,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 194. [2018-11-10 05:30:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-11-10 05:30:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 256 transitions. [2018-11-10 05:30:28,090 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 256 transitions. Word has length 52 [2018-11-10 05:30:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:28,090 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 256 transitions. [2018-11-10 05:30:28,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 05:30:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 256 transitions. [2018-11-10 05:30:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-10 05:30:28,091 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:28,091 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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] [2018-11-10 05:30:28,091 INFO L424 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:28,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:28,092 INFO L82 PathProgramCache]: Analyzing trace with hash 886696979, now seen corresponding path program 1 times [2018-11-10 05:30:28,092 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:28,092 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:28,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:28,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 05:30:30,282 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:30:30,283 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:30:30,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 05:30:30,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 05:30:30,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 05:30:30,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2018-11-10 05:30:30,284 INFO L87 Difference]: Start difference. First operand 194 states and 256 transitions. Second operand 8 states. [2018-11-10 05:30:41,394 WARN L179 SmtUtils]: Spent 3.95 s on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2018-11-10 05:30:43,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:43,144 INFO L93 Difference]: Finished difference Result 214 states and 281 transitions. [2018-11-10 05:30:43,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 05:30:43,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2018-11-10 05:30:43,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:43,145 INFO L225 Difference]: With dead ends: 214 [2018-11-10 05:30:43,145 INFO L226 Difference]: Without dead ends: 212 [2018-11-10 05:30:43,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=27, Invalid=61, Unknown=2, NotChecked=0, Total=90 [2018-11-10 05:30:43,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-11-10 05:30:43,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 199. [2018-11-10 05:30:43,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-11-10 05:30:43,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 261 transitions. [2018-11-10 05:30:43,174 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 261 transitions. Word has length 52 [2018-11-10 05:30:43,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:43,174 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 261 transitions. [2018-11-10 05:30:43,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 05:30:43,174 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 261 transitions. [2018-11-10 05:30:43,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-10 05:30:43,175 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:43,175 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:30:43,175 INFO L424 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:43,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:43,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1957183671, now seen corresponding path program 1 times [2018-11-10 05:30:43,176 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:43,176 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:43,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:43,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-10 05:30:43,258 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:30:43,260 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:30:43,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 05:30:43,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 05:30:43,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 05:30:43,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-10 05:30:43,261 INFO L87 Difference]: Start difference. First operand 199 states and 261 transitions. Second operand 8 states. [2018-11-10 05:30:43,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:43,370 INFO L93 Difference]: Finished difference Result 270 states and 351 transitions. [2018-11-10 05:30:43,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 05:30:43,371 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2018-11-10 05:30:43,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:43,372 INFO L225 Difference]: With dead ends: 270 [2018-11-10 05:30:43,372 INFO L226 Difference]: Without dead ends: 233 [2018-11-10 05:30:43,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-10 05:30:43,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-11-10 05:30:43,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 225. [2018-11-10 05:30:43,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-11-10 05:30:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 294 transitions. [2018-11-10 05:30:43,392 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 294 transitions. Word has length 56 [2018-11-10 05:30:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:43,392 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 294 transitions. [2018-11-10 05:30:43,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 05:30:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 294 transitions. [2018-11-10 05:30:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-10 05:30:43,393 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:43,394 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:30:43,394 INFO L424 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:43,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:43,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1568286989, now seen corresponding path program 1 times [2018-11-10 05:30:43,394 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:43,394 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:43,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:43,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-10 05:30:43,463 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:30:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 05:30:43,563 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 05:30:43,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-10 05:30:43,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 05:30:43,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 05:30:43,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:30:43,564 INFO L87 Difference]: Start difference. First operand 225 states and 294 transitions. Second operand 12 states. [2018-11-10 05:30:43,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:30:43,799 INFO L93 Difference]: Finished difference Result 349 states and 463 transitions. [2018-11-10 05:30:43,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 05:30:43,800 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2018-11-10 05:30:43,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:30:43,801 INFO L225 Difference]: With dead ends: 349 [2018-11-10 05:30:43,801 INFO L226 Difference]: Without dead ends: 310 [2018-11-10 05:30:43,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:30:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2018-11-10 05:30:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 284. [2018-11-10 05:30:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-11-10 05:30:43,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 380 transitions. [2018-11-10 05:30:43,845 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 380 transitions. Word has length 56 [2018-11-10 05:30:43,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:30:43,845 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 380 transitions. [2018-11-10 05:30:43,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 05:30:43,845 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 380 transitions. [2018-11-10 05:30:43,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-10 05:30:43,847 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:30:43,847 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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] [2018-11-10 05:30:43,847 INFO L424 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:30:43,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:30:43,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1490792353, now seen corresponding path program 1 times [2018-11-10 05:30:43,847 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:30:43,847 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:30:43,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:30:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:30:43,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:30:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 05:30:51,753 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:30:51,754 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:30:51,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 05:30:51,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 05:30:51,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 05:30:51,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=37, Unknown=3, NotChecked=0, Total=56 [2018-11-10 05:30:51,754 INFO L87 Difference]: Start difference. First operand 284 states and 380 transitions. Second operand 8 states. [2018-11-10 05:30:58,117 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 24 [2018-11-10 05:31:02,198 WARN L179 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 24 [2018-11-10 05:31:07,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:07,412 INFO L93 Difference]: Finished difference Result 325 states and 429 transitions. [2018-11-10 05:31:07,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 05:31:07,413 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2018-11-10 05:31:07,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:07,414 INFO L225 Difference]: With dead ends: 325 [2018-11-10 05:31:07,414 INFO L226 Difference]: Without dead ends: 293 [2018-11-10 05:31:07,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=32, Invalid=75, Unknown=3, NotChecked=0, Total=110 [2018-11-10 05:31:07,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-11-10 05:31:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 258. [2018-11-10 05:31:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-11-10 05:31:07,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 349 transitions. [2018-11-10 05:31:07,462 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 349 transitions. Word has length 53 [2018-11-10 05:31:07,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:07,462 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 349 transitions. [2018-11-10 05:31:07,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 05:31:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 349 transitions. [2018-11-10 05:31:07,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-10 05:31:07,463 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:07,463 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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] [2018-11-10 05:31:07,464 INFO L424 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:07,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:07,464 INFO L82 PathProgramCache]: Analyzing trace with hash 268694133, now seen corresponding path program 1 times [2018-11-10 05:31:07,464 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:07,464 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 28 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:07,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:07,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 05:31:07,580 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 05:31:07,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:07,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2018-11-10 05:31:07,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 05:31:07,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 05:31:07,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2018-11-10 05:31:07,742 INFO L87 Difference]: Start difference. First operand 258 states and 349 transitions. Second operand 18 states. [2018-11-10 05:31:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:07,967 INFO L93 Difference]: Finished difference Result 294 states and 393 transitions. [2018-11-10 05:31:07,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 05:31:07,967 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2018-11-10 05:31:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:07,968 INFO L225 Difference]: With dead ends: 294 [2018-11-10 05:31:07,968 INFO L226 Difference]: Without dead ends: 285 [2018-11-10 05:31:07,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2018-11-10 05:31:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-11-10 05:31:08,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 263. [2018-11-10 05:31:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-11-10 05:31:08,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 355 transitions. [2018-11-10 05:31:08,002 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 355 transitions. Word has length 66 [2018-11-10 05:31:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:08,003 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 355 transitions. [2018-11-10 05:31:08,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 05:31:08,003 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 355 transitions. [2018-11-10 05:31:08,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-10 05:31:08,004 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:08,004 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:08,004 INFO L424 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:08,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:08,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1748938256, now seen corresponding path program 1 times [2018-11-10 05:31:08,005 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:08,005 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:08,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:08,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 05:31:08,110 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 05:31:08,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:08,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-11-10 05:31:08,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 05:31:08,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 05:31:08,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-11-10 05:31:08,184 INFO L87 Difference]: Start difference. First operand 263 states and 355 transitions. Second operand 11 states. [2018-11-10 05:31:08,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:08,345 INFO L93 Difference]: Finished difference Result 288 states and 389 transitions. [2018-11-10 05:31:08,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 05:31:08,346 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2018-11-10 05:31:08,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:08,347 INFO L225 Difference]: With dead ends: 288 [2018-11-10 05:31:08,347 INFO L226 Difference]: Without dead ends: 270 [2018-11-10 05:31:08,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-11-10 05:31:08,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-11-10 05:31:08,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 258. [2018-11-10 05:31:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-11-10 05:31:08,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 346 transitions. [2018-11-10 05:31:08,389 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 346 transitions. Word has length 66 [2018-11-10 05:31:08,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:08,389 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 346 transitions. [2018-11-10 05:31:08,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 05:31:08,389 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 346 transitions. [2018-11-10 05:31:08,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-10 05:31:08,390 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:08,390 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:08,390 INFO L424 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:08,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:08,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2057113616, now seen corresponding path program 2 times [2018-11-10 05:31:08,390 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:08,391 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 30 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:08,410 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 05:31:08,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:31:08,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:31:08,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 05:31:08,467 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 05:31:08,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:08,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-11-10 05:31:08,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 05:31:08,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 05:31:08,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-11-10 05:31:08,544 INFO L87 Difference]: Start difference. First operand 258 states and 346 transitions. Second operand 11 states. [2018-11-10 05:31:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:08,692 INFO L93 Difference]: Finished difference Result 285 states and 379 transitions. [2018-11-10 05:31:08,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 05:31:08,692 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2018-11-10 05:31:08,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:08,693 INFO L225 Difference]: With dead ends: 285 [2018-11-10 05:31:08,693 INFO L226 Difference]: Without dead ends: 267 [2018-11-10 05:31:08,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:31:08,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-11-10 05:31:08,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 261. [2018-11-10 05:31:08,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-11-10 05:31:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 350 transitions. [2018-11-10 05:31:08,721 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 350 transitions. Word has length 66 [2018-11-10 05:31:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:08,722 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 350 transitions. [2018-11-10 05:31:08,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 05:31:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 350 transitions. [2018-11-10 05:31:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-10 05:31:08,722 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:08,722 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:31:08,723 INFO L424 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:08,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:08,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1889836214, now seen corresponding path program 1 times [2018-11-10 05:31:08,723 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:08,723 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 31 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:08,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:31:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:08,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 05:31:08,779 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 05:31:08,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:08,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-11-10 05:31:08,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 05:31:08,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 05:31:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-11-10 05:31:08,848 INFO L87 Difference]: Start difference. First operand 261 states and 350 transitions. Second operand 11 states. [2018-11-10 05:31:08,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:08,977 INFO L93 Difference]: Finished difference Result 278 states and 368 transitions. [2018-11-10 05:31:08,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 05:31:08,978 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2018-11-10 05:31:08,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:08,979 INFO L225 Difference]: With dead ends: 278 [2018-11-10 05:31:08,979 INFO L226 Difference]: Without dead ends: 264 [2018-11-10 05:31:08,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:31:08,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-11-10 05:31:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2018-11-10 05:31:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-11-10 05:31:09,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 344 transitions. [2018-11-10 05:31:09,012 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 344 transitions. Word has length 68 [2018-11-10 05:31:09,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:09,012 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 344 transitions. [2018-11-10 05:31:09,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 05:31:09,012 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 344 transitions. [2018-11-10 05:31:09,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-10 05:31:09,013 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:09,014 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:31:09,014 INFO L424 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:09,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:09,014 INFO L82 PathProgramCache]: Analyzing trace with hash 318821134, now seen corresponding path program 2 times [2018-11-10 05:31:09,014 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:09,014 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 32 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:09,027 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 05:31:09,062 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:31:09,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:31:09,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 05:31:09,099 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 05:31:09,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:09,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-11-10 05:31:09,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 05:31:09,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 05:31:09,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-11-10 05:31:09,163 INFO L87 Difference]: Start difference. First operand 258 states and 344 transitions. Second operand 11 states. [2018-11-10 05:31:09,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:09,293 INFO L93 Difference]: Finished difference Result 275 states and 362 transitions. [2018-11-10 05:31:09,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 05:31:09,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2018-11-10 05:31:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:09,294 INFO L225 Difference]: With dead ends: 275 [2018-11-10 05:31:09,294 INFO L226 Difference]: Without dead ends: 252 [2018-11-10 05:31:09,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-11-10 05:31:09,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-11-10 05:31:09,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 247. [2018-11-10 05:31:09,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-11-10 05:31:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 327 transitions. [2018-11-10 05:31:09,334 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 327 transitions. Word has length 68 [2018-11-10 05:31:09,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:09,335 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 327 transitions. [2018-11-10 05:31:09,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 05:31:09,335 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 327 transitions. [2018-11-10 05:31:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 05:31:09,335 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:09,336 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:09,336 INFO L424 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:09,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:09,336 INFO L82 PathProgramCache]: Analyzing trace with hash -542631703, now seen corresponding path program 1 times [2018-11-10 05:31:09,336 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:09,336 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 33 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:09,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:31:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:09,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-10 05:31:09,488 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-10 05:31:09,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:09,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-11-10 05:31:09,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 05:31:09,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 05:31:09,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-11-10 05:31:09,700 INFO L87 Difference]: Start difference. First operand 247 states and 327 transitions. Second operand 16 states. [2018-11-10 05:31:10,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:10,085 INFO L93 Difference]: Finished difference Result 273 states and 355 transitions. [2018-11-10 05:31:10,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 05:31:10,086 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2018-11-10 05:31:10,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:10,087 INFO L225 Difference]: With dead ends: 273 [2018-11-10 05:31:10,087 INFO L226 Difference]: Without dead ends: 261 [2018-11-10 05:31:10,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2018-11-10 05:31:10,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-11-10 05:31:10,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 242. [2018-11-10 05:31:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-11-10 05:31:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 312 transitions. [2018-11-10 05:31:10,131 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 312 transitions. Word has length 73 [2018-11-10 05:31:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:10,131 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 312 transitions. [2018-11-10 05:31:10,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 05:31:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 312 transitions. [2018-11-10 05:31:10,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 05:31:10,132 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:10,132 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:10,132 INFO L424 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:10,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:10,133 INFO L82 PathProgramCache]: Analyzing trace with hash 574681436, now seen corresponding path program 1 times [2018-11-10 05:31:10,133 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:10,133 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 34 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:10,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:10,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 05:31:10,515 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:10,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:31:10,725 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:31:10,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:10,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 05:31:11,214 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:11,328 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2018-11-10 05:31:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-10 05:31:12,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 05:31:12,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 28 [2018-11-10 05:31:12,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-10 05:31:12,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-10 05:31:12,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2018-11-10 05:31:12,960 INFO L87 Difference]: Start difference. First operand 242 states and 312 transitions. Second operand 28 states. [2018-11-10 05:31:13,781 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2018-11-10 05:31:14,476 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2018-11-10 05:31:14,771 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2018-11-10 05:31:15,324 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2018-11-10 05:31:15,635 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2018-11-10 05:31:15,960 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2018-11-10 05:31:16,889 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2018-11-10 05:31:17,602 WARN L179 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2018-11-10 05:31:18,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:18,162 INFO L93 Difference]: Finished difference Result 299 states and 387 transitions. [2018-11-10 05:31:18,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 05:31:18,163 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 73 [2018-11-10 05:31:18,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:18,164 INFO L225 Difference]: With dead ends: 299 [2018-11-10 05:31:18,164 INFO L226 Difference]: Without dead ends: 288 [2018-11-10 05:31:18,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 194 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=286, Invalid=1520, Unknown=0, NotChecked=0, Total=1806 [2018-11-10 05:31:18,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-11-10 05:31:18,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 251. [2018-11-10 05:31:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-11-10 05:31:18,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 325 transitions. [2018-11-10 05:31:18,215 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 325 transitions. Word has length 73 [2018-11-10 05:31:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:18,216 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 325 transitions. [2018-11-10 05:31:18,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-10 05:31:18,216 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 325 transitions. [2018-11-10 05:31:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 05:31:18,217 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:18,217 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:18,217 INFO L424 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:18,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:18,217 INFO L82 PathProgramCache]: Analyzing trace with hash -822756571, now seen corresponding path program 1 times [2018-11-10 05:31:18,218 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:18,218 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 36 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:18,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:18,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-10 05:31:18,461 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:18,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:31:18,559 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:31:18,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:18,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-10 05:31:19,601 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:31:19,617 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 05:31:19,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [13] total 29 [2018-11-10 05:31:19,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-10 05:31:19,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-10 05:31:19,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2018-11-10 05:31:19,618 INFO L87 Difference]: Start difference. First operand 251 states and 325 transitions. Second operand 29 states. [2018-11-10 05:31:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:20,889 INFO L93 Difference]: Finished difference Result 295 states and 376 transitions. [2018-11-10 05:31:20,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-10 05:31:20,889 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 73 [2018-11-10 05:31:20,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:20,890 INFO L225 Difference]: With dead ends: 295 [2018-11-10 05:31:20,890 INFO L226 Difference]: Without dead ends: 283 [2018-11-10 05:31:20,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=211, Invalid=1595, Unknown=0, NotChecked=0, Total=1806 [2018-11-10 05:31:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-11-10 05:31:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 261. [2018-11-10 05:31:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-11-10 05:31:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 335 transitions. [2018-11-10 05:31:20,924 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 335 transitions. Word has length 73 [2018-11-10 05:31:20,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:20,924 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 335 transitions. [2018-11-10 05:31:20,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-10 05:31:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 335 transitions. [2018-11-10 05:31:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 05:31:20,925 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:20,925 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:20,925 INFO L424 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:20,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:20,925 INFO L82 PathProgramCache]: Analyzing trace with hash -242967014, now seen corresponding path program 1 times [2018-11-10 05:31:20,925 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:20,925 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 38 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:20,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:20,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-10 05:31:21,264 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-10 05:31:21,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:21,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2018-11-10 05:31:21,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-10 05:31:21,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-10 05:31:21,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2018-11-10 05:31:21,845 INFO L87 Difference]: Start difference. First operand 261 states and 335 transitions. Second operand 19 states. [2018-11-10 05:31:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:22,981 INFO L93 Difference]: Finished difference Result 309 states and 405 transitions. [2018-11-10 05:31:22,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 05:31:22,983 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-11-10 05:31:22,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:22,984 INFO L225 Difference]: With dead ends: 309 [2018-11-10 05:31:22,984 INFO L226 Difference]: Without dead ends: 298 [2018-11-10 05:31:22,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2018-11-10 05:31:22,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-11-10 05:31:23,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 265. [2018-11-10 05:31:23,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-11-10 05:31:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 350 transitions. [2018-11-10 05:31:23,019 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 350 transitions. Word has length 73 [2018-11-10 05:31:23,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:23,019 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 350 transitions. [2018-11-10 05:31:23,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-10 05:31:23,020 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 350 transitions. [2018-11-10 05:31:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-11-10 05:31:23,020 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:23,020 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:23,020 INFO L424 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:23,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:23,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1918289387, now seen corresponding path program 1 times [2018-11-10 05:31:23,021 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:23,021 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 39 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:23,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:23,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-11-10 05:31:23,393 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:23,514 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2018-11-10 05:31:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-10 05:31:24,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:24,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2018-11-10 05:31:24,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-10 05:31:24,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-10 05:31:24,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2018-11-10 05:31:24,905 INFO L87 Difference]: Start difference. First operand 265 states and 350 transitions. Second operand 23 states. [2018-11-10 05:31:26,087 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2018-11-10 05:31:26,278 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2018-11-10 05:31:26,758 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2018-11-10 05:31:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:27,452 INFO L93 Difference]: Finished difference Result 310 states and 403 transitions. [2018-11-10 05:31:27,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 05:31:27,454 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 78 [2018-11-10 05:31:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:27,455 INFO L225 Difference]: With dead ends: 310 [2018-11-10 05:31:27,455 INFO L226 Difference]: Without dead ends: 294 [2018-11-10 05:31:27,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2018-11-10 05:31:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-11-10 05:31:27,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 264. [2018-11-10 05:31:27,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-11-10 05:31:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 341 transitions. [2018-11-10 05:31:27,495 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 341 transitions. Word has length 78 [2018-11-10 05:31:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:27,495 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 341 transitions. [2018-11-10 05:31:27,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-10 05:31:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 341 transitions. [2018-11-10 05:31:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-10 05:31:27,496 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:27,496 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:27,497 INFO L424 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:27,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:27,497 INFO L82 PathProgramCache]: Analyzing trace with hash -470064393, now seen corresponding path program 1 times [2018-11-10 05:31:27,497 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:27,497 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 40 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:27,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:27,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-11-10 05:31:27,972 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:28,893 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2018-11-10 05:31:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-10 05:31:29,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:29,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2018-11-10 05:31:29,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-10 05:31:29,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-10 05:31:29,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2018-11-10 05:31:29,808 INFO L87 Difference]: Start difference. First operand 264 states and 341 transitions. Second operand 25 states. [2018-11-10 05:31:30,543 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2018-11-10 05:31:31,238 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2018-11-10 05:31:32,392 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2018-11-10 05:31:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:33,867 INFO L93 Difference]: Finished difference Result 353 states and 438 transitions. [2018-11-10 05:31:33,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-10 05:31:33,868 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 79 [2018-11-10 05:31:33,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:33,869 INFO L225 Difference]: With dead ends: 353 [2018-11-10 05:31:33,869 INFO L226 Difference]: Without dead ends: 266 [2018-11-10 05:31:33,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2018-11-10 05:31:33,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-11-10 05:31:33,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 245. [2018-11-10 05:31:33,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-11-10 05:31:33,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 310 transitions. [2018-11-10 05:31:33,899 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 310 transitions. Word has length 79 [2018-11-10 05:31:33,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:33,899 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 310 transitions. [2018-11-10 05:31:33,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-10 05:31:33,899 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 310 transitions. [2018-11-10 05:31:33,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-11-10 05:31:33,900 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:33,900 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:33,900 INFO L424 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:33,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:33,900 INFO L82 PathProgramCache]: Analyzing trace with hash 749631404, now seen corresponding path program 1 times [2018-11-10 05:31:33,900 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:33,900 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 41 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:33,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:33,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 05:31:34,351 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-10 05:31:35,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:35,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2018-11-10 05:31:35,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-10 05:31:35,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-10 05:31:35,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2018-11-10 05:31:35,614 INFO L87 Difference]: Start difference. First operand 245 states and 310 transitions. Second operand 22 states. [2018-11-10 05:31:36,075 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2018-11-10 05:31:36,449 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-11-10 05:31:36,769 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2018-11-10 05:31:37,078 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2018-11-10 05:31:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:37,814 INFO L93 Difference]: Finished difference Result 288 states and 361 transitions. [2018-11-10 05:31:37,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 05:31:37,815 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 75 [2018-11-10 05:31:37,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:37,816 INFO L225 Difference]: With dead ends: 288 [2018-11-10 05:31:37,816 INFO L226 Difference]: Without dead ends: 271 [2018-11-10 05:31:37,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2018-11-10 05:31:37,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-11-10 05:31:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 240. [2018-11-10 05:31:37,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-11-10 05:31:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 294 transitions. [2018-11-10 05:31:37,846 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 294 transitions. Word has length 75 [2018-11-10 05:31:37,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:37,847 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 294 transitions. [2018-11-10 05:31:37,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-10 05:31:37,847 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 294 transitions. [2018-11-10 05:31:37,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-11-10 05:31:37,848 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:37,848 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:37,848 INFO L424 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:37,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1329420961, now seen corresponding path program 1 times [2018-11-10 05:31:37,848 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:37,848 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 42 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:37,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:37,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-10 05:31:37,904 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-10 05:31:37,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:37,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-10 05:31:37,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 05:31:37,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 05:31:37,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 05:31:37,939 INFO L87 Difference]: Start difference. First operand 240 states and 294 transitions. Second operand 6 states. [2018-11-10 05:31:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:38,020 INFO L93 Difference]: Finished difference Result 263 states and 324 transitions. [2018-11-10 05:31:38,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 05:31:38,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2018-11-10 05:31:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:38,021 INFO L225 Difference]: With dead ends: 263 [2018-11-10 05:31:38,022 INFO L226 Difference]: Without dead ends: 258 [2018-11-10 05:31:38,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-10 05:31:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-11-10 05:31:38,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 242. [2018-11-10 05:31:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-11-10 05:31:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 300 transitions. [2018-11-10 05:31:38,051 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 300 transitions. Word has length 75 [2018-11-10 05:31:38,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:38,052 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 300 transitions. [2018-11-10 05:31:38,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 05:31:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 300 transitions. [2018-11-10 05:31:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-11-10 05:31:38,052 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:38,053 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:38,053 INFO L424 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:38,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:38,053 INFO L82 PathProgramCache]: Analyzing trace with hash 232161324, now seen corresponding path program 1 times [2018-11-10 05:31:38,053 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:38,053 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 43 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:38,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:38,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-10 05:31:38,133 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:31:38,134 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:31:38,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-11-10 05:31:38,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 05:31:38,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 05:31:38,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-10 05:31:38,134 INFO L87 Difference]: Start difference. First operand 242 states and 300 transitions. Second operand 11 states. [2018-11-10 05:31:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:38,299 INFO L93 Difference]: Finished difference Result 256 states and 313 transitions. [2018-11-10 05:31:38,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:31:38,299 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2018-11-10 05:31:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:38,300 INFO L225 Difference]: With dead ends: 256 [2018-11-10 05:31:38,300 INFO L226 Difference]: Without dead ends: 244 [2018-11-10 05:31:38,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2018-11-10 05:31:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-11-10 05:31:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 234. [2018-11-10 05:31:38,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-11-10 05:31:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 290 transitions. [2018-11-10 05:31:38,328 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 290 transitions. Word has length 75 [2018-11-10 05:31:38,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:38,328 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 290 transitions. [2018-11-10 05:31:38,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 05:31:38,328 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 290 transitions. [2018-11-10 05:31:38,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 05:31:38,328 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:38,328 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:38,329 INFO L424 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:38,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:38,329 INFO L82 PathProgramCache]: Analyzing trace with hash 601038488, now seen corresponding path program 2 times [2018-11-10 05:31:38,329 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:38,329 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 44 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:38,341 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 05:31:38,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:31:38,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:31:38,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 05:31:38,711 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-10 05:31:39,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:39,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2018-11-10 05:31:39,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-10 05:31:39,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-10 05:31:39,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2018-11-10 05:31:39,793 INFO L87 Difference]: Start difference. First operand 234 states and 290 transitions. Second operand 22 states. [2018-11-10 05:31:40,148 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2018-11-10 05:31:40,514 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2018-11-10 05:31:40,796 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2018-11-10 05:31:41,146 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2018-11-10 05:31:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:41,941 INFO L93 Difference]: Finished difference Result 279 states and 344 transitions. [2018-11-10 05:31:41,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 05:31:41,943 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 73 [2018-11-10 05:31:41,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:41,944 INFO L225 Difference]: With dead ends: 279 [2018-11-10 05:31:41,944 INFO L226 Difference]: Without dead ends: 268 [2018-11-10 05:31:41,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2018-11-10 05:31:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-11-10 05:31:41,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 244. [2018-11-10 05:31:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-11-10 05:31:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 301 transitions. [2018-11-10 05:31:41,978 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 301 transitions. Word has length 73 [2018-11-10 05:31:41,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:41,979 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 301 transitions. [2018-11-10 05:31:41,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-10 05:31:41,979 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 301 transitions. [2018-11-10 05:31:41,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-11-10 05:31:41,979 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:41,980 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:41,980 INFO L424 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:41,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:41,980 INFO L82 PathProgramCache]: Analyzing trace with hash -727548568, now seen corresponding path program 2 times [2018-11-10 05:31:41,980 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:41,980 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 45 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:42,000 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:31:42,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:31:42,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:31:42,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 05:31:42,454 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-10 05:31:43,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:43,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2018-11-10 05:31:43,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-10 05:31:43,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-10 05:31:43,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2018-11-10 05:31:43,757 INFO L87 Difference]: Start difference. First operand 244 states and 301 transitions. Second operand 22 states. [2018-11-10 05:31:44,277 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2018-11-10 05:31:44,732 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2018-11-10 05:31:45,165 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2018-11-10 05:31:45,428 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2018-11-10 05:31:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:46,259 INFO L93 Difference]: Finished difference Result 272 states and 335 transitions. [2018-11-10 05:31:46,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 05:31:46,260 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 75 [2018-11-10 05:31:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:46,261 INFO L225 Difference]: With dead ends: 272 [2018-11-10 05:31:46,261 INFO L226 Difference]: Without dead ends: 258 [2018-11-10 05:31:46,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2018-11-10 05:31:46,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-11-10 05:31:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 244. [2018-11-10 05:31:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-11-10 05:31:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 300 transitions. [2018-11-10 05:31:46,303 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 300 transitions. Word has length 75 [2018-11-10 05:31:46,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:46,303 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 300 transitions. [2018-11-10 05:31:46,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-10 05:31:46,303 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 300 transitions. [2018-11-10 05:31:46,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-10 05:31:46,304 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:46,304 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:46,304 INFO L424 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:46,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:46,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1650535367, now seen corresponding path program 1 times [2018-11-10 05:31:46,304 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:46,304 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 46 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:46,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:31:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:46,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-10 05:31:46,355 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:31:46,356 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:31:46,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 05:31:46,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 05:31:46,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 05:31:46,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 05:31:46,357 INFO L87 Difference]: Start difference. First operand 244 states and 300 transitions. Second operand 6 states. [2018-11-10 05:31:46,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:46,413 INFO L93 Difference]: Finished difference Result 265 states and 322 transitions. [2018-11-10 05:31:46,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 05:31:46,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2018-11-10 05:31:46,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:46,414 INFO L225 Difference]: With dead ends: 265 [2018-11-10 05:31:46,414 INFO L226 Difference]: Without dead ends: 250 [2018-11-10 05:31:46,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-10 05:31:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-11-10 05:31:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 232. [2018-11-10 05:31:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-11-10 05:31:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 280 transitions. [2018-11-10 05:31:46,446 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 280 transitions. Word has length 77 [2018-11-10 05:31:46,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:46,447 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 280 transitions. [2018-11-10 05:31:46,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 05:31:46,447 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 280 transitions. [2018-11-10 05:31:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-10 05:31:46,447 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:46,448 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:46,448 INFO L424 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:46,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:46,448 INFO L82 PathProgramCache]: Analyzing trace with hash -626509594, now seen corresponding path program 1 times [2018-11-10 05:31:46,448 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:46,448 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 47 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:46,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:46,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 05:31:46,758 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:46,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:31:46,941 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:31:46,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:46,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 05:31:47,158 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:47,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:47,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 15 [2018-11-10 05:31:47,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 05:31:47,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 05:31:47,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-11-10 05:31:47,373 INFO L87 Difference]: Start difference. First operand 232 states and 280 transitions. Second operand 15 states. [2018-11-10 05:31:49,668 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 18 [2018-11-10 05:31:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:50,279 INFO L93 Difference]: Finished difference Result 256 states and 310 transitions. [2018-11-10 05:31:50,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 05:31:50,280 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2018-11-10 05:31:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:50,281 INFO L225 Difference]: With dead ends: 256 [2018-11-10 05:31:50,281 INFO L226 Difference]: Without dead ends: 247 [2018-11-10 05:31:50,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2018-11-10 05:31:50,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-11-10 05:31:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 238. [2018-11-10 05:31:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-11-10 05:31:50,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 291 transitions. [2018-11-10 05:31:50,318 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 291 transitions. Word has length 82 [2018-11-10 05:31:50,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:50,318 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 291 transitions. [2018-11-10 05:31:50,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 05:31:50,318 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 291 transitions. [2018-11-10 05:31:50,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-10 05:31:50,319 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:50,319 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:50,319 INFO L424 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:50,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:50,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1933092310, now seen corresponding path program 1 times [2018-11-10 05:31:50,319 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:50,319 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 49 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:50,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:50,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-11-10 05:31:50,981 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-10 05:31:53,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:53,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2018-11-10 05:31:53,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-10 05:31:53,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-10 05:31:53,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2018-11-10 05:31:53,507 INFO L87 Difference]: Start difference. First operand 238 states and 291 transitions. Second operand 26 states. [2018-11-10 05:31:54,158 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2018-11-10 05:31:55,396 WARN L179 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2018-11-10 05:31:56,139 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2018-11-10 05:31:57,010 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 37 [2018-11-10 05:31:57,891 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2018-11-10 05:31:58,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:58,732 INFO L93 Difference]: Finished difference Result 277 states and 333 transitions. [2018-11-10 05:31:58,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-10 05:31:58,733 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 82 [2018-11-10 05:31:58,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:58,734 INFO L225 Difference]: With dead ends: 277 [2018-11-10 05:31:58,734 INFO L226 Difference]: Without dead ends: 257 [2018-11-10 05:31:58,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=329, Invalid=1393, Unknown=0, NotChecked=0, Total=1722 [2018-11-10 05:31:58,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-11-10 05:31:58,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 243. [2018-11-10 05:31:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-11-10 05:31:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 294 transitions. [2018-11-10 05:31:58,770 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 294 transitions. Word has length 82 [2018-11-10 05:31:58,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:58,770 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 294 transitions. [2018-11-10 05:31:58,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-10 05:31:58,770 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 294 transitions. [2018-11-10 05:31:58,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-11-10 05:31:58,771 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:58,771 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:31:58,771 INFO L424 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:58,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:58,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1494301786, now seen corresponding path program 1 times [2018-11-10 05:31:58,772 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:58,772 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 50 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:58,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:58,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:31:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 05:31:58,884 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:31:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 05:31:59,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:31:59,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2018-11-10 05:31:59,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 05:31:59,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 05:31:59,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-11-10 05:31:59,033 INFO L87 Difference]: Start difference. First operand 243 states and 294 transitions. Second operand 18 states. [2018-11-10 05:31:59,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:31:59,493 INFO L93 Difference]: Finished difference Result 256 states and 309 transitions. [2018-11-10 05:31:59,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 05:31:59,493 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2018-11-10 05:31:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:31:59,494 INFO L225 Difference]: With dead ends: 256 [2018-11-10 05:31:59,494 INFO L226 Difference]: Without dead ends: 207 [2018-11-10 05:31:59,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2018-11-10 05:31:59,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-11-10 05:31:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-11-10 05:31:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-11-10 05:31:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 255 transitions. [2018-11-10 05:31:59,528 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 255 transitions. Word has length 83 [2018-11-10 05:31:59,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:31:59,528 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 255 transitions. [2018-11-10 05:31:59,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 05:31:59,528 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 255 transitions. [2018-11-10 05:31:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-10 05:31:59,529 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:31:59,529 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:31:59,529 INFO L424 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:31:59,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:31:59,529 INFO L82 PathProgramCache]: Analyzing trace with hash -983723244, now seen corresponding path program 1 times [2018-11-10 05:31:59,529 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:31:59,529 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 51 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:31:59,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:31:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:31:59,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:32:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-11-10 05:32:00,288 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:32:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-10 05:32:02,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:32:02,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2018-11-10 05:32:02,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-10 05:32:02,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-10 05:32:02,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2018-11-10 05:32:02,870 INFO L87 Difference]: Start difference. First operand 207 states and 255 transitions. Second operand 26 states. [2018-11-10 05:32:03,620 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2018-11-10 05:32:04,411 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2018-11-10 05:32:05,123 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2018-11-10 05:32:06,278 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2018-11-10 05:32:07,108 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2018-11-10 05:32:08,230 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2018-11-10 05:32:08,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:32:08,470 INFO L93 Difference]: Finished difference Result 241 states and 295 transitions. [2018-11-10 05:32:08,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-10 05:32:08,472 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 80 [2018-11-10 05:32:08,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:32:08,473 INFO L225 Difference]: With dead ends: 241 [2018-11-10 05:32:08,473 INFO L226 Difference]: Without dead ends: 231 [2018-11-10 05:32:08,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=347, Invalid=1633, Unknown=0, NotChecked=0, Total=1980 [2018-11-10 05:32:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-11-10 05:32:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 217. [2018-11-10 05:32:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-11-10 05:32:08,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 268 transitions. [2018-11-10 05:32:08,506 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 268 transitions. Word has length 80 [2018-11-10 05:32:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:32:08,506 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 268 transitions. [2018-11-10 05:32:08,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-10 05:32:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 268 transitions. [2018-11-10 05:32:08,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-10 05:32:08,507 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:32:08,507 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:32:08,507 INFO L424 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:32:08,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:32:08,507 INFO L82 PathProgramCache]: Analyzing trace with hash 82071700, now seen corresponding path program 2 times [2018-11-10 05:32:08,507 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:32:08,507 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 52 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:32:08,520 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 05:32:08,627 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:32:08,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:32:08,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:32:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-11-10 05:32:09,266 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:32:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-10 05:32:11,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:32:11,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2018-11-10 05:32:11,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-10 05:32:11,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-10 05:32:11,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2018-11-10 05:32:11,736 INFO L87 Difference]: Start difference. First operand 217 states and 268 transitions. Second operand 26 states. [2018-11-10 05:32:12,384 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2018-11-10 05:32:13,416 WARN L179 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2018-11-10 05:32:13,960 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2018-11-10 05:32:14,397 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2018-11-10 05:32:16,291 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2018-11-10 05:32:16,613 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2018-11-10 05:32:17,935 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2018-11-10 05:32:18,292 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 39 [2018-11-10 05:32:19,410 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2018-11-10 05:32:19,808 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2018-11-10 05:32:20,273 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2018-11-10 05:32:20,574 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2018-11-10 05:32:20,879 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2018-11-10 05:32:21,128 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2018-11-10 05:32:21,668 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2018-11-10 05:32:22,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:32:22,312 INFO L93 Difference]: Finished difference Result 263 states and 321 transitions. [2018-11-10 05:32:22,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-10 05:32:22,313 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 80 [2018-11-10 05:32:22,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:32:22,315 INFO L225 Difference]: With dead ends: 263 [2018-11-10 05:32:22,315 INFO L226 Difference]: Without dead ends: 250 [2018-11-10 05:32:22,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=468, Invalid=2184, Unknown=0, NotChecked=0, Total=2652 [2018-11-10 05:32:22,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-11-10 05:32:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 236. [2018-11-10 05:32:22,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-11-10 05:32:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 292 transitions. [2018-11-10 05:32:22,378 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 292 transitions. Word has length 80 [2018-11-10 05:32:22,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:32:22,379 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 292 transitions. [2018-11-10 05:32:22,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-10 05:32:22,379 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 292 transitions. [2018-11-10 05:32:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-11-10 05:32:22,380 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:32:22,380 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:32:22,380 INFO L424 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:32:22,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:32:22,380 INFO L82 PathProgramCache]: Analyzing trace with hash 951306978, now seen corresponding path program 1 times [2018-11-10 05:32:22,380 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:32:22,380 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 53 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:32:22,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:32:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:32:22,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:32:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-10 05:32:22,528 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:32:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-10 05:32:22,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:32:22,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-11-10 05:32:22,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 05:32:22,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 05:32:22,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:32:22,674 INFO L87 Difference]: Start difference. First operand 236 states and 292 transitions. Second operand 15 states. [2018-11-10 05:32:23,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:32:23,228 INFO L93 Difference]: Finished difference Result 245 states and 300 transitions. [2018-11-10 05:32:23,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:32:23,228 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2018-11-10 05:32:23,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:32:23,230 INFO L225 Difference]: With dead ends: 245 [2018-11-10 05:32:23,230 INFO L226 Difference]: Without dead ends: 200 [2018-11-10 05:32:23,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2018-11-10 05:32:23,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-11-10 05:32:23,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-11-10 05:32:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-11-10 05:32:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 247 transitions. [2018-11-10 05:32:23,273 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 247 transitions. Word has length 83 [2018-11-10 05:32:23,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:32:23,273 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 247 transitions. [2018-11-10 05:32:23,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 05:32:23,273 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 247 transitions. [2018-11-10 05:32:23,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-10 05:32:23,274 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:32:23,274 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:32:23,274 INFO L424 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:32:23,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:32:23,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1824680542, now seen corresponding path program 1 times [2018-11-10 05:32:23,275 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:32:23,275 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 54 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:32:23,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:32:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:32:23,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:32:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-10 05:32:23,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:32:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-10 05:32:23,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:32:23,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-11-10 05:32:23,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 05:32:23,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 05:32:23,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:32:23,648 INFO L87 Difference]: Start difference. First operand 200 states and 247 transitions. Second operand 15 states. [2018-11-10 05:32:24,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:32:24,163 INFO L93 Difference]: Finished difference Result 212 states and 259 transitions. [2018-11-10 05:32:24,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:32:24,164 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 81 [2018-11-10 05:32:24,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:32:24,164 INFO L225 Difference]: With dead ends: 212 [2018-11-10 05:32:24,164 INFO L226 Difference]: Without dead ends: 202 [2018-11-10 05:32:24,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2018-11-10 05:32:24,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-11-10 05:32:24,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 187. [2018-11-10 05:32:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-11-10 05:32:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 229 transitions. [2018-11-10 05:32:24,197 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 229 transitions. Word has length 81 [2018-11-10 05:32:24,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:32:24,197 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 229 transitions. [2018-11-10 05:32:24,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 05:32:24,197 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 229 transitions. [2018-11-10 05:32:24,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-10 05:32:24,197 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:32:24,197 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:32:24,198 INFO L424 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:32:24,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:32:24,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1318182193, now seen corresponding path program 1 times [2018-11-10 05:32:24,198 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:32:24,198 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 55 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:32:24,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:32:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:32:24,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:32:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 05:32:26,413 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:32:26,732 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-11-10 05:32:26,835 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-11-10 05:32:26,954 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-11-10 05:32:27,059 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-11-10 05:32:28,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:32:28,301 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:32:28,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:32:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:32:29,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:32:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 05:32:29,175 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:32:29,476 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-11-10 05:32:29,603 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-11-10 05:32:30,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:32:30,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-10 05:32:30,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-10 05:32:30,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-10 05:32:30,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2018-11-10 05:32:30,100 INFO L87 Difference]: Start difference. First operand 187 states and 229 transitions. Second operand 20 states. [2018-11-10 05:32:34,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:32:34,302 INFO L93 Difference]: Finished difference Result 203 states and 248 transitions. [2018-11-10 05:32:34,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-10 05:32:34,303 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2018-11-10 05:32:34,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:32:34,304 INFO L225 Difference]: With dead ends: 203 [2018-11-10 05:32:34,304 INFO L226 Difference]: Without dead ends: 194 [2018-11-10 05:32:34,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2018-11-10 05:32:34,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-11-10 05:32:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 187. [2018-11-10 05:32:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-11-10 05:32:34,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 229 transitions. [2018-11-10 05:32:34,331 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 229 transitions. Word has length 85 [2018-11-10 05:32:34,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:32:34,331 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 229 transitions. [2018-11-10 05:32:34,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-10 05:32:34,332 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 229 transitions. [2018-11-10 05:32:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-10 05:32:34,332 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:32:34,332 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:32:34,332 INFO L424 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:32:34,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:32:34,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1904425370, now seen corresponding path program 2 times [2018-11-10 05:32:34,332 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:32:34,333 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 57 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:32:34,347 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 05:32:34,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:32:34,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:32:34,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:32:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-10 05:32:34,447 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:32:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-10 05:32:34,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:32:34,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-11-10 05:32:34,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 05:32:34,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 05:32:34,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:32:34,576 INFO L87 Difference]: Start difference. First operand 187 states and 229 transitions. Second operand 15 states. [2018-11-10 05:32:35,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:32:35,014 INFO L93 Difference]: Finished difference Result 197 states and 239 transitions. [2018-11-10 05:32:35,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 05:32:35,014 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 81 [2018-11-10 05:32:35,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:32:35,015 INFO L225 Difference]: With dead ends: 197 [2018-11-10 05:32:35,016 INFO L226 Difference]: Without dead ends: 190 [2018-11-10 05:32:35,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2018-11-10 05:32:35,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-11-10 05:32:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 185. [2018-11-10 05:32:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-11-10 05:32:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 226 transitions. [2018-11-10 05:32:35,045 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 226 transitions. Word has length 81 [2018-11-10 05:32:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:32:35,045 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 226 transitions. [2018-11-10 05:32:35,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 05:32:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 226 transitions. [2018-11-10 05:32:35,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-10 05:32:35,046 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:32:35,046 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:32:35,046 INFO L424 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:32:35,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:32:35,046 INFO L82 PathProgramCache]: Analyzing trace with hash -831671501, now seen corresponding path program 2 times [2018-11-10 05:32:35,046 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:32:35,046 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 58 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:32:35,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:32:35,144 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:32:35,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:32:35,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:32:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-11-10 05:32:35,546 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:32:36,297 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2018-11-10 05:32:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-10 05:32:37,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:32:37,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 26 [2018-11-10 05:32:37,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-10 05:32:37,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-10 05:32:37,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2018-11-10 05:32:37,391 INFO L87 Difference]: Start difference. First operand 185 states and 226 transitions. Second operand 26 states. [2018-11-10 05:32:39,393 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2018-11-10 05:32:39,613 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2018-11-10 05:32:40,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:32:40,100 INFO L93 Difference]: Finished difference Result 239 states and 286 transitions. [2018-11-10 05:32:40,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-10 05:32:40,101 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 79 [2018-11-10 05:32:40,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:32:40,101 INFO L225 Difference]: With dead ends: 239 [2018-11-10 05:32:40,102 INFO L226 Difference]: Without dead ends: 182 [2018-11-10 05:32:40,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=267, Invalid=1215, Unknown=0, NotChecked=0, Total=1482 [2018-11-10 05:32:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-11-10 05:32:40,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2018-11-10 05:32:40,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-11-10 05:32:40,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 210 transitions. [2018-11-10 05:32:40,127 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 210 transitions. Word has length 79 [2018-11-10 05:32:40,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:32:40,127 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 210 transitions. [2018-11-10 05:32:40,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-10 05:32:40,127 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 210 transitions. [2018-11-10 05:32:40,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-11-10 05:32:40,128 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:32:40,128 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:32:40,128 INFO L424 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:32:40,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:32:40,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2001517725, now seen corresponding path program 1 times [2018-11-10 05:32:40,129 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:32:40,129 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 59 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:32:40,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:32:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:32:40,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:32:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-10 05:32:40,598 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:32:40,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:32:40,833 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:32:40,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:32:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:32:40,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:32:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-10 05:32:40,919 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:32:41,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:32:41,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-10 05:32:41,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 05:32:41,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 05:32:41,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2018-11-10 05:32:41,119 INFO L87 Difference]: Start difference. First operand 173 states and 210 transitions. Second operand 16 states. [2018-11-10 05:32:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:32:42,538 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2018-11-10 05:32:42,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 05:32:42,539 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2018-11-10 05:32:42,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:32:42,539 INFO L225 Difference]: With dead ends: 192 [2018-11-10 05:32:42,540 INFO L226 Difference]: Without dead ends: 187 [2018-11-10 05:32:42,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2018-11-10 05:32:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-11-10 05:32:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 173. [2018-11-10 05:32:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-11-10 05:32:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 210 transitions. [2018-11-10 05:32:42,564 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 210 transitions. Word has length 86 [2018-11-10 05:32:42,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:32:42,564 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 210 transitions. [2018-11-10 05:32:42,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 05:32:42,564 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 210 transitions. [2018-11-10 05:32:42,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-11-10 05:32:42,565 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:32:42,565 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:32:42,565 INFO L424 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:32:42,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:32:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1740519295, now seen corresponding path program 1 times [2018-11-10 05:32:42,565 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:32:42,565 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 61 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:32:42,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:32:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:32:42,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:32:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 05:32:44,957 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:32:45,429 WARN L179 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2018-11-10 05:32:45,622 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2018-11-10 05:32:45,753 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2018-11-10 05:32:47,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:32:47,302 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:32:47,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:32:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:32:48,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:32:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-11-10 05:32:48,390 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:32:48,666 WARN L179 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2018-11-10 05:32:48,841 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2018-11-10 05:32:48,945 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2018-11-10 05:32:49,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:32:49,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 24 [2018-11-10 05:32:49,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-10 05:32:49,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-10 05:32:49,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2018-11-10 05:32:49,246 INFO L87 Difference]: Start difference. First operand 173 states and 210 transitions. Second operand 24 states. [2018-11-10 05:32:54,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:32:54,764 INFO L93 Difference]: Finished difference Result 186 states and 223 transitions. [2018-11-10 05:32:54,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-10 05:32:54,766 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2018-11-10 05:32:54,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:32:54,767 INFO L225 Difference]: With dead ends: 186 [2018-11-10 05:32:54,767 INFO L226 Difference]: Without dead ends: 169 [2018-11-10 05:32:54,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=149, Invalid=2013, Unknown=0, NotChecked=0, Total=2162 [2018-11-10 05:32:54,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-11-10 05:32:54,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2018-11-10 05:32:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-11-10 05:32:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 198 transitions. [2018-11-10 05:32:54,795 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 198 transitions. Word has length 87 [2018-11-10 05:32:54,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:32:54,796 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 198 transitions. [2018-11-10 05:32:54,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-10 05:32:54,796 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 198 transitions. [2018-11-10 05:32:54,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-11-10 05:32:54,796 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:32:54,796 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:32:54,796 INFO L424 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:32:54,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:32:54,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1662960963, now seen corresponding path program 2 times [2018-11-10 05:32:54,797 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:32:54,797 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 63 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:32:54,809 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 05:32:55,103 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:32:55,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:32:55,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:32:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 05:32:57,201 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:32:57,602 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2018-11-10 05:32:59,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:32:59,477 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:32:59,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:33:00,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:33:00,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:33:00,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:33:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-11-10 05:33:05,349 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:33:05,601 WARN L179 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2018-11-10 05:33:08,107 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2018-11-10 05:33:08,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:33:08,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 37 [2018-11-10 05:33:08,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-10 05:33:08,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-10 05:33:08,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2035, Unknown=0, NotChecked=0, Total=2162 [2018-11-10 05:33:08,129 INFO L87 Difference]: Start difference. First operand 165 states and 198 transitions. Second operand 37 states. [2018-11-10 05:33:11,294 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2018-11-10 05:33:14,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:33:14,871 INFO L93 Difference]: Finished difference Result 185 states and 218 transitions. [2018-11-10 05:33:14,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-10 05:33:14,872 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 87 [2018-11-10 05:33:14,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:33:14,872 INFO L225 Difference]: With dead ends: 185 [2018-11-10 05:33:14,872 INFO L226 Difference]: Without dead ends: 176 [2018-11-10 05:33:14,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=239, Invalid=3793, Unknown=0, NotChecked=0, Total=4032 [2018-11-10 05:33:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-11-10 05:33:14,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 165. [2018-11-10 05:33:14,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-11-10 05:33:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 197 transitions. [2018-11-10 05:33:14,898 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 197 transitions. Word has length 87 [2018-11-10 05:33:14,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:33:14,898 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 197 transitions. [2018-11-10 05:33:14,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-10 05:33:14,898 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 197 transitions. [2018-11-10 05:33:14,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-11-10 05:33:14,898 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:33:14,899 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:33:14,899 INFO L424 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:33:14,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:33:14,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1831478609, now seen corresponding path program 2 times [2018-11-10 05:33:14,899 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:33:14,899 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 65 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:33:14,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:33:15,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:33:15,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:33:15,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:33:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 05:33:15,573 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:33:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-10 05:33:17,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:33:17,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2018-11-10 05:33:17,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-10 05:33:17,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-10 05:33:17,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2018-11-10 05:33:17,615 INFO L87 Difference]: Start difference. First operand 165 states and 197 transitions. Second operand 24 states. [2018-11-10 05:33:18,773 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2018-11-10 05:33:21,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:33:21,109 INFO L93 Difference]: Finished difference Result 194 states and 228 transitions. [2018-11-10 05:33:21,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-10 05:33:21,111 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2018-11-10 05:33:21,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:33:21,111 INFO L225 Difference]: With dead ends: 194 [2018-11-10 05:33:21,111 INFO L226 Difference]: Without dead ends: 159 [2018-11-10 05:33:21,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 146 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=308, Invalid=1414, Unknown=0, NotChecked=0, Total=1722 [2018-11-10 05:33:21,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-11-10 05:33:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2018-11-10 05:33:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-11-10 05:33:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 178 transitions. [2018-11-10 05:33:21,148 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 178 transitions. Word has length 86 [2018-11-10 05:33:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:33:21,148 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 178 transitions. [2018-11-10 05:33:21,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-10 05:33:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 178 transitions. [2018-11-10 05:33:21,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-10 05:33:21,149 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:33:21,149 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:33:21,149 INFO L424 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:33:21,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:33:21,150 INFO L82 PathProgramCache]: Analyzing trace with hash 824545201, now seen corresponding path program 2 times [2018-11-10 05:33:21,150 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:33:21,150 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 66 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:33:21,165 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:33:21,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:33:21,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:33:21,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:33:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 05:33:23,009 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:33:24,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:33:24,638 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:33:24,643 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:33:25,529 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:33:25,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:33:25,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:33:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 05:33:25,573 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:33:25,701 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2018-11-10 05:33:25,878 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2018-11-10 05:33:26,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:33:26,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-10 05:33:26,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-10 05:33:26,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-10 05:33:26,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2018-11-10 05:33:26,439 INFO L87 Difference]: Start difference. First operand 152 states and 178 transitions. Second operand 20 states. [2018-11-10 05:33:29,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:33:29,898 INFO L93 Difference]: Finished difference Result 168 states and 194 transitions. [2018-11-10 05:33:29,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-10 05:33:29,900 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2018-11-10 05:33:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:33:29,901 INFO L225 Difference]: With dead ends: 168 [2018-11-10 05:33:29,901 INFO L226 Difference]: Without dead ends: 154 [2018-11-10 05:33:29,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2018-11-10 05:33:29,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-11-10 05:33:29,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 147. [2018-11-10 05:33:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-11-10 05:33:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2018-11-10 05:33:29,922 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 85 [2018-11-10 05:33:29,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:33:29,922 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2018-11-10 05:33:29,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-10 05:33:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2018-11-10 05:33:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-10 05:33:29,922 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:33:29,923 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:33:29,923 INFO L424 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:33:29,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:33:29,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2002992726, now seen corresponding path program 2 times [2018-11-10 05:33:29,923 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:33:29,923 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 68 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:33:29,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:33:29,996 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:33:29,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:33:30,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:33:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 05:33:30,188 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:33:30,190 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:33:30,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-11-10 05:33:30,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 05:33:30,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 05:33:30,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-11-10 05:33:30,190 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand 11 states. [2018-11-10 05:33:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:33:32,685 INFO L93 Difference]: Finished difference Result 165 states and 187 transitions. [2018-11-10 05:33:32,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 05:33:32,686 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2018-11-10 05:33:32,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:33:32,686 INFO L225 Difference]: With dead ends: 165 [2018-11-10 05:33:32,687 INFO L226 Difference]: Without dead ends: 151 [2018-11-10 05:33:32,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2018-11-10 05:33:32,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-11-10 05:33:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2018-11-10 05:33:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-11-10 05:33:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 167 transitions. [2018-11-10 05:33:32,705 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 167 transitions. Word has length 82 [2018-11-10 05:33:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:33:32,706 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 167 transitions. [2018-11-10 05:33:32,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 05:33:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 167 transitions. [2018-11-10 05:33:32,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-11-10 05:33:32,706 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:33:32,706 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:33:32,706 INFO L424 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:33:32,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:33:32,706 INFO L82 PathProgramCache]: Analyzing trace with hash 369093641, now seen corresponding path program 1 times [2018-11-10 05:33:32,707 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:33:32,707 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 69 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:33:32,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:33:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:33:32,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:33:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 05:33:33,309 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:33:34,227 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2018-11-10 05:33:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-10 05:33:35,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:33:35,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2018-11-10 05:33:35,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-10 05:33:35,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-10 05:33:35,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2018-11-10 05:33:35,474 INFO L87 Difference]: Start difference. First operand 146 states and 167 transitions. Second operand 24 states. [2018-11-10 05:33:37,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:33:37,546 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2018-11-10 05:33:37,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 05:33:37,548 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 88 [2018-11-10 05:33:37,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:33:37,548 INFO L225 Difference]: With dead ends: 158 [2018-11-10 05:33:37,548 INFO L226 Difference]: Without dead ends: 142 [2018-11-10 05:33:37,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2018-11-10 05:33:37,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-11-10 05:33:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 124. [2018-11-10 05:33:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-11-10 05:33:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 139 transitions. [2018-11-10 05:33:37,563 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 139 transitions. Word has length 88 [2018-11-10 05:33:37,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:33:37,563 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 139 transitions. [2018-11-10 05:33:37,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-10 05:33:37,563 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 139 transitions. [2018-11-10 05:33:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-11-10 05:33:37,564 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:33:37,564 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:33:37,564 INFO L424 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:33:37,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:33:37,564 INFO L82 PathProgramCache]: Analyzing trace with hash 45643823, now seen corresponding path program 3 times [2018-11-10 05:33:37,564 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:33:37,564 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 70 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:33:37,577 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-10 05:33:37,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-10 05:33:37,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:33:37,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:33:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-10 05:33:38,298 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:33:38,454 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2018-11-10 05:33:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-10 05:33:40,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:33:40,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2018-11-10 05:33:40,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-10 05:33:40,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-10 05:33:40,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2018-11-10 05:33:40,344 INFO L87 Difference]: Start difference. First operand 124 states and 139 transitions. Second operand 24 states. [2018-11-10 05:33:41,548 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2018-11-10 05:33:44,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:33:44,636 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2018-11-10 05:33:44,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-10 05:33:44,637 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2018-11-10 05:33:44,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:33:44,637 INFO L225 Difference]: With dead ends: 136 [2018-11-10 05:33:44,638 INFO L226 Difference]: Without dead ends: 93 [2018-11-10 05:33:44,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 146 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2018-11-10 05:33:44,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-10 05:33:44,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-11-10 05:33:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-10 05:33:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2018-11-10 05:33:44,647 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 86 [2018-11-10 05:33:44,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:33:44,648 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2018-11-10 05:33:44,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-10 05:33:44,648 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2018-11-10 05:33:44,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-11-10 05:33:44,648 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:33:44,648 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:33:44,648 INFO L424 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:33:44,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:33:44,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1215605918, now seen corresponding path program 2 times [2018-11-10 05:33:44,648 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:33:44,648 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 71 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:33:44,662 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 05:33:44,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:33:44,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:33:44,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:33:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 05:33:44,754 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:33:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 05:33:44,899 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 05:33:44,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 17 [2018-11-10 05:33:44,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 05:33:44,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 05:33:44,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2018-11-10 05:33:44,900 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 17 states. [2018-11-10 05:33:45,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:33:45,146 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2018-11-10 05:33:45,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:33:45,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2018-11-10 05:33:45,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:33:45,147 INFO L225 Difference]: With dead ends: 104 [2018-11-10 05:33:45,147 INFO L226 Difference]: Without dead ends: 76 [2018-11-10 05:33:45,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2018-11-10 05:33:45,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-10 05:33:45,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2018-11-10 05:33:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-10 05:33:45,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2018-11-10 05:33:45,155 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 83 [2018-11-10 05:33:45,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:33:45,155 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2018-11-10 05:33:45,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 05:33:45,155 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2018-11-10 05:33:45,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-11-10 05:33:45,155 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:33:45,155 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-10 05:33:45,155 INFO L424 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:33:45,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:33:45,156 INFO L82 PathProgramCache]: Analyzing trace with hash -451652450, now seen corresponding path program 2 times [2018-11-10 05:33:45,156 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 05:33:45,156 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0da03f82-a285-4d37-a4ca-d02953022d8f/bin-2019/uautomizer/cvc4nyu Starting monitored process 72 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 05:33:45,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:33:45,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:33:45,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:33:45,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:33:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-10 05:33:45,260 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:33:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-10 05:33:45,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:33:45,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-11-10 05:33:45,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 05:33:45,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 05:33:45,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:33:45,385 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 15 states. [2018-11-10 05:33:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:33:45,635 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2018-11-10 05:33:45,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 05:33:45,636 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2018-11-10 05:33:45,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:33:45,636 INFO L225 Difference]: With dead ends: 73 [2018-11-10 05:33:45,636 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 05:33:45,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-10 05:33:45,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 05:33:45,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 05:33:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 05:33:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 05:33:45,637 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 83 [2018-11-10 05:33:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:33:45,637 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 05:33:45,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 05:33:45,637 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 05:33:45,637 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 05:33:45,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 05:33:45,762 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:46,075 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:46,267 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:46,272 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 243 [2018-11-10 05:33:46,570 WARN L179 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 309 [2018-11-10 05:33:46,576 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:46,700 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 323 [2018-11-10 05:33:46,702 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:46,706 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:46,848 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 340 [2018-11-10 05:33:46,850 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:46,857 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:46,986 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 290 [2018-11-10 05:33:47,145 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:47,212 WARN L179 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 347 [2018-11-10 05:33:47,215 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:47,280 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:47,322 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:47,358 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:47,448 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:47,612 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:47,677 WARN L179 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 347 [2018-11-10 05:33:47,680 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:47,859 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 397 [2018-11-10 05:33:47,872 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:47,978 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 325 [2018-11-10 05:33:48,168 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 289 [2018-11-10 05:33:48,172 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:48,302 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 392 [2018-11-10 05:33:48,305 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:48,556 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:48,582 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:48,612 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:48,619 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 277 [2018-11-10 05:33:48,620 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:48,670 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:48,731 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:33:48,824 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 05:35:20,980 WARN L179 SmtUtils]: Spent 1.53 m on a formula simplification. DAG size of input: 344 DAG size of output: 52 [2018-11-10 05:35:21,128 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 1 [2018-11-10 05:41:44,067 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:191) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:150) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplifyWithStatistics(SmtUtils.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeCFGHoareAnnotation(BasicCegarLoop.java:982) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 31 more [2018-11-10 05:41:44,069 INFO L168 Benchmark]: Toolchain (without parser) took 692748.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 949.7 MB in the beginning and 894.8 MB in the end (delta: 54.9 MB). Peak memory consumption was 344.8 MB. Max. memory is 11.5 GB. [2018-11-10 05:41:44,070 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:41:44,070 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.50 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 933.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-10 05:41:44,070 INFO L168 Benchmark]: Boogie Preprocessor took 27.65 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:41:44,070 INFO L168 Benchmark]: RCFGBuilder took 355.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -185.4 MB). Peak memory consumption was 26.0 MB. Max. memory is 11.5 GB. [2018-11-10 05:41:44,070 INFO L168 Benchmark]: TraceAbstraction took 692133.45 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: -2.1 MB). Free memory was 1.1 GB in the beginning and 894.8 MB in the end (delta: 224.2 MB). Peak memory consumption was 365.7 MB. Max. memory is 11.5 GB. [2018-11-10 05:41:44,072 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 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 229.50 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 933.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.65 ms. Allocated memory is still 1.0 GB. Free memory is still 933.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 355.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -185.4 MB). Peak memory consumption was 26.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 692133.45 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: -2.1 MB). Free memory was 1.1 GB in the beginning and 894.8 MB in the end (delta: 224.2 MB). Peak memory consumption was 365.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...