./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/bitvector/soft_float_1_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_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 f756365182c9801d4a2ac186a40692687a86b469 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 f756365182c9801d4a2ac186a40692687a86b469 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 10:32:56,830 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 10:32:56,831 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 10:32:56,839 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 10:32:56,840 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 10:32:56,840 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 10:32:56,841 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 10:32:56,842 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 10:32:56,844 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 10:32:56,845 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 10:32:56,845 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 10:32:56,846 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 10:32:56,846 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 10:32:56,847 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 10:32:56,848 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 10:32:56,849 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 10:32:56,849 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 10:32:56,850 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 10:32:56,852 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 10:32:56,853 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 10:32:56,853 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 10:32:56,854 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 10:32:56,856 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 10:32:56,856 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 10:32:56,856 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 10:32:56,857 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 10:32:56,857 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 10:32:56,858 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 10:32:56,858 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 10:32:56,859 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 10:32:56,859 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 10:32:56,860 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 10:32:56,860 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 10:32:56,860 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 10:32:56,860 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 10:32:56,861 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 10:32:56,861 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 10:32:56,871 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 10:32:56,871 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 10:32:56,872 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 10:32:56,872 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 10:32:56,872 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 10:32:56,873 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 10:32:56,873 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 10:32:56,873 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 10:32:56,873 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 10:32:56,873 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 10:32:56,873 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 10:32:56,873 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 10:32:56,873 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 10:32:56,874 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 10:32:56,874 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 10:32:56,874 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 10:32:56,874 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 10:32:56,874 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 10:32:56,874 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 10:32:56,874 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 10:32:56,874 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 10:32:56,875 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 10:32:56,875 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 10:32:56,875 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 10:32:56,875 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 10:32:56,875 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 10:32:56,875 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 10:32:56,875 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 10:32:56,875 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 10:32:56,875 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_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 -> f756365182c9801d4a2ac186a40692687a86b469 [2018-11-10 10:32:56,897 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 10:32:56,905 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 10:32:56,907 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 10:32:56,907 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 10:32:56,908 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 10:32:56,908 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/../../sv-benchmarks/c/bitvector/soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 10:32:56,944 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/data/58b9f06c7/ff430227cd6149a0ad48c99ddd06cbef/FLAG4d3f3550d [2018-11-10 10:32:57,359 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 10:32:57,359 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/sv-benchmarks/c/bitvector/soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 10:32:57,364 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/data/58b9f06c7/ff430227cd6149a0ad48c99ddd06cbef/FLAG4d3f3550d [2018-11-10 10:32:57,372 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/data/58b9f06c7/ff430227cd6149a0ad48c99ddd06cbef [2018-11-10 10:32:57,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 10:32:57,376 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 10:32:57,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 10:32:57,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 10:32:57,379 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 10:32:57,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:32:57" (1/1) ... [2018-11-10 10:32:57,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1735f00b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:57, skipping insertion in model container [2018-11-10 10:32:57,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:32:57" (1/1) ... [2018-11-10 10:32:57,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 10:32:57,403 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 10:32:57,517 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 10:32:57,519 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 10:32:57,546 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 10:32:57,554 INFO L193 MainTranslator]: Completed translation [2018-11-10 10:32:57,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:57 WrapperNode [2018-11-10 10:32:57,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 10:32:57,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 10:32:57,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 10:32:57,555 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 10:32:57,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:57" (1/1) ... [2018-11-10 10:32:57,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:57" (1/1) ... [2018-11-10 10:32:57,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:57" (1/1) ... [2018-11-10 10:32:57,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:57" (1/1) ... [2018-11-10 10:32:57,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:57" (1/1) ... [2018-11-10 10:32:57,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:57" (1/1) ... [2018-11-10 10:32:57,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:57" (1/1) ... [2018-11-10 10:32:57,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 10:32:57,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 10:32:57,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 10:32:57,585 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 10:32:57,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:32:57,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 10:32:57,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 10:32:57,658 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 10:32:57,658 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2018-11-10 10:32:57,659 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2018-11-10 10:32:57,659 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2018-11-10 10:32:57,659 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 10:32:57,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 10:32:57,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-11-10 10:32:57,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-11-10 10:32:57,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 10:32:57,659 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2018-11-10 10:32:57,659 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2018-11-10 10:32:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2018-11-10 10:32:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 10:32:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 10:32:57,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 10:32:57,988 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 10:32:57,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 10:32:57 BoogieIcfgContainer [2018-11-10 10:32:57,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 10:32:57,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 10:32:57,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 10:32:57,992 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 10:32:57,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:32:57" (1/3) ... [2018-11-10 10:32:57,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db89f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:32:57, skipping insertion in model container [2018-11-10 10:32:57,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:57" (2/3) ... [2018-11-10 10:32:57,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db89f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:32:57, skipping insertion in model container [2018-11-10 10:32:57,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 10:32:57" (3/3) ... [2018-11-10 10:32:57,995 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 10:32:58,004 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 10:32:58,011 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 10:32:58,025 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 10:32:58,051 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 10:32:58,052 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 10:32:58,052 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 10:32:58,052 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 10:32:58,052 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 10:32:58,052 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 10:32:58,052 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 10:32:58,053 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 10:32:58,053 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 10:32:58,069 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2018-11-10 10:32:58,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-10 10:32:58,074 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:32:58,075 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, 1, 1] [2018-11-10 10:32:58,077 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:32:58,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:32:58,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1652746855, now seen corresponding path program 1 times [2018-11-10 10:32:58,083 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:32:58,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:32:58,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:32:58,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:32:58,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:32:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:32:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 10:32:58,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:32:58,298 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:32:58,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:32:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:32:58,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:32:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 10:32:58,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:32:58,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 12 [2018-11-10 10:32:58,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 10:32:58,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 10:32:58,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-10 10:32:58,487 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 12 states. [2018-11-10 10:32:58,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:32:58,899 INFO L93 Difference]: Finished difference Result 213 states and 338 transitions. [2018-11-10 10:32:58,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 10:32:58,901 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2018-11-10 10:32:58,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:32:58,909 INFO L225 Difference]: With dead ends: 213 [2018-11-10 10:32:58,910 INFO L226 Difference]: Without dead ends: 132 [2018-11-10 10:32:58,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2018-11-10 10:32:58,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-11-10 10:32:58,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2018-11-10 10:32:58,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-11-10 10:32:58,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 159 transitions. [2018-11-10 10:32:58,953 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 159 transitions. Word has length 36 [2018-11-10 10:32:58,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:32:58,954 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 159 transitions. [2018-11-10 10:32:58,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 10:32:58,954 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 159 transitions. [2018-11-10 10:32:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-10 10:32:58,957 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:32:58,957 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, 1, 1, 1, 1, 1, 1] [2018-11-10 10:32:58,957 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:32:58,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:32:58,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1280900227, now seen corresponding path program 1 times [2018-11-10 10:32:58,958 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:32:58,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:32:58,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:32:58,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:32:58,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:32:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:32:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-10 10:32:59,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:32:59,153 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:32:59,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:32:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:32:59,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:32:59,276 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 10:32:59,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:32:59,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2018-11-10 10:32:59,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 10:32:59,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 10:32:59,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2018-11-10 10:32:59,302 INFO L87 Difference]: Start difference. First operand 114 states and 159 transitions. Second operand 17 states. [2018-11-10 10:32:59,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:32:59,920 INFO L93 Difference]: Finished difference Result 319 states and 462 transitions. [2018-11-10 10:32:59,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-10 10:32:59,921 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2018-11-10 10:32:59,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:32:59,923 INFO L225 Difference]: With dead ends: 319 [2018-11-10 10:32:59,923 INFO L226 Difference]: Without dead ends: 244 [2018-11-10 10:32:59,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2018-11-10 10:32:59,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-11-10 10:32:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 208. [2018-11-10 10:32:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-11-10 10:32:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 286 transitions. [2018-11-10 10:32:59,943 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 286 transitions. Word has length 45 [2018-11-10 10:32:59,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:32:59,944 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 286 transitions. [2018-11-10 10:32:59,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 10:32:59,944 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 286 transitions. [2018-11-10 10:32:59,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 10:32:59,946 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:32:59,946 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:32:59,947 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:32:59,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:32:59,947 INFO L82 PathProgramCache]: Analyzing trace with hash -775161259, now seen corresponding path program 1 times [2018-11-10 10:32:59,947 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:32:59,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:32:59,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:32:59,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:32:59,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:32:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:32:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:32:59,986 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:32:59,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 10:32:59,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 10:32:59,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 10:32:59,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 10:32:59,987 INFO L87 Difference]: Start difference. First operand 208 states and 286 transitions. Second operand 4 states. [2018-11-10 10:33:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:00,015 INFO L93 Difference]: Finished difference Result 314 states and 448 transitions. [2018-11-10 10:33:00,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 10:33:00,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2018-11-10 10:33:00,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:00,020 INFO L225 Difference]: With dead ends: 314 [2018-11-10 10:33:00,021 INFO L226 Difference]: Without dead ends: 231 [2018-11-10 10:33:00,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:33:00,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-11-10 10:33:00,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 195. [2018-11-10 10:33:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-11-10 10:33:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 257 transitions. [2018-11-10 10:33:00,036 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 257 transitions. Word has length 49 [2018-11-10 10:33:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:00,036 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 257 transitions. [2018-11-10 10:33:00,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 10:33:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 257 transitions. [2018-11-10 10:33:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 10:33:00,038 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:00,038 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:00,038 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:00,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:00,039 INFO L82 PathProgramCache]: Analyzing trace with hash -906766727, now seen corresponding path program 1 times [2018-11-10 10:33:00,039 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:33:00,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:33:00,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:33:00,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:00,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:33:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:33:00,077 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:00,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 10:33:00,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 10:33:00,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 10:33:00,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 10:33:00,078 INFO L87 Difference]: Start difference. First operand 195 states and 257 transitions. Second operand 4 states. [2018-11-10 10:33:00,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:00,105 INFO L93 Difference]: Finished difference Result 216 states and 284 transitions. [2018-11-10 10:33:00,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 10:33:00,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2018-11-10 10:33:00,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:00,107 INFO L225 Difference]: With dead ends: 216 [2018-11-10 10:33:00,107 INFO L226 Difference]: Without dead ends: 209 [2018-11-10 10:33:00,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:33:00,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-11-10 10:33:00,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 201. [2018-11-10 10:33:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-11-10 10:33:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 263 transitions. [2018-11-10 10:33:00,119 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 263 transitions. Word has length 50 [2018-11-10 10:33:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:00,120 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 263 transitions. [2018-11-10 10:33:00,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 10:33:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 263 transitions. [2018-11-10 10:33:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 10:33:00,121 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:00,121 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:00,121 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:00,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:00,121 INFO L82 PathProgramCache]: Analyzing trace with hash 868240635, now seen corresponding path program 1 times [2018-11-10 10:33:00,121 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:33:00,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:33:00,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:33:00,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:00,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:33:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:33:00,162 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:00,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 10:33:00,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 10:33:00,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 10:33:00,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:33:00,163 INFO L87 Difference]: Start difference. First operand 201 states and 263 transitions. Second operand 5 states. [2018-11-10 10:33:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:00,188 INFO L93 Difference]: Finished difference Result 208 states and 269 transitions. [2018-11-10 10:33:00,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 10:33:00,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2018-11-10 10:33:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:00,190 INFO L225 Difference]: With dead ends: 208 [2018-11-10 10:33:00,190 INFO L226 Difference]: Without dead ends: 201 [2018-11-10 10:33:00,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:33:00,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-11-10 10:33:00,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 195. [2018-11-10 10:33:00,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-11-10 10:33:00,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 253 transitions. [2018-11-10 10:33:00,200 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 253 transitions. Word has length 50 [2018-11-10 10:33:00,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:00,200 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 253 transitions. [2018-11-10 10:33:00,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 10:33:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 253 transitions. [2018-11-10 10:33:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 10:33:00,201 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:00,201 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, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:00,202 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:00,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:00,202 INFO L82 PathProgramCache]: Analyzing trace with hash 219761125, now seen corresponding path program 2 times [2018-11-10 10:33:00,202 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:33:00,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:33:00,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:33:00,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:00,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:33:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:00,346 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 10:33:00,347 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:00,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2018-11-10 10:33:00,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 10:33:00,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 10:33:00,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-11-10 10:33:00,347 INFO L87 Difference]: Start difference. First operand 195 states and 253 transitions. Second operand 13 states. [2018-11-10 10:33:00,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:00,632 INFO L93 Difference]: Finished difference Result 375 states and 517 transitions. [2018-11-10 10:33:00,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 10:33:00,632 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2018-11-10 10:33:00,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:00,634 INFO L225 Difference]: With dead ends: 375 [2018-11-10 10:33:00,634 INFO L226 Difference]: Without dead ends: 321 [2018-11-10 10:33:00,636 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 10:33:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2018-11-10 10:33:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 304. [2018-11-10 10:33:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-11-10 10:33:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 407 transitions. [2018-11-10 10:33:00,649 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 407 transitions. Word has length 50 [2018-11-10 10:33:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:00,649 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 407 transitions. [2018-11-10 10:33:00,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 10:33:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 407 transitions. [2018-11-10 10:33:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 10:33:00,650 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:00,652 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] [2018-11-10 10:33:00,652 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:00,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:00,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1369751255, now seen corresponding path program 1 times [2018-11-10 10:33:00,652 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:33:00,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:33:00,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:33:00,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:33:00,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:33:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 10:33:00,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:33:00,757 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:00,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:00,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-10 10:33:00,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:33:00,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-11-10 10:33:00,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 10:33:00,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 10:33:00,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2018-11-10 10:33:00,869 INFO L87 Difference]: Start difference. First operand 304 states and 407 transitions. Second operand 16 states. [2018-11-10 10:33:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:01,108 INFO L93 Difference]: Finished difference Result 400 states and 531 transitions. [2018-11-10 10:33:01,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 10:33:01,109 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2018-11-10 10:33:01,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:01,111 INFO L225 Difference]: With dead ends: 400 [2018-11-10 10:33:01,111 INFO L226 Difference]: Without dead ends: 311 [2018-11-10 10:33:01,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2018-11-10 10:33:01,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-11-10 10:33:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 283. [2018-11-10 10:33:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-11-10 10:33:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 378 transitions. [2018-11-10 10:33:01,126 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 378 transitions. Word has length 50 [2018-11-10 10:33:01,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:01,127 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 378 transitions. [2018-11-10 10:33:01,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 10:33:01,127 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 378 transitions. [2018-11-10 10:33:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 10:33:01,128 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:01,128 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] [2018-11-10 10:33:01,128 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:01,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:01,128 INFO L82 PathProgramCache]: Analyzing trace with hash -782945241, now seen corresponding path program 1 times [2018-11-10 10:33:01,129 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:33:01,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:33:01,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:33:01,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:01,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:33:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 10:33:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 10:33:01,167 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 10:33:01,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 10:33:01 BoogieIcfgContainer [2018-11-10 10:33:01,193 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 10:33:01,194 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 10:33:01,194 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 10:33:01,194 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 10:33:01,195 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 10:32:57" (3/4) ... [2018-11-10 10:33:01,198 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-10 10:33:01,198 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 10:33:01,199 INFO L168 Benchmark]: Toolchain (without parser) took 3823.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 217.1 MB). Free memory was 960.2 MB in the beginning and 922.9 MB in the end (delta: 37.3 MB). Peak memory consumption was 254.3 MB. Max. memory is 11.5 GB. [2018-11-10 10:33:01,200 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 10:33:01,200 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.06 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 944.1 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-10 10:33:01,201 INFO L168 Benchmark]: Boogie Preprocessor took 29.60 ms. Allocated memory is still 1.0 GB. Free memory is still 944.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 10:33:01,201 INFO L168 Benchmark]: RCFGBuilder took 404.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 944.1 MB in the beginning and 1.1 GB in the end (delta: -171.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2018-11-10 10:33:01,202 INFO L168 Benchmark]: TraceAbstraction took 3203.99 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.1 MB). Free memory was 1.1 GB in the beginning and 922.9 MB in the end (delta: 192.1 MB). Peak memory consumption was 259.2 MB. Max. memory is 11.5 GB. [2018-11-10 10:33:01,202 INFO L168 Benchmark]: Witness Printer took 4.65 ms. Allocated memory is still 1.2 GB. Free memory is still 922.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 10:33:01,204 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 178.06 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 944.1 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.60 ms. Allocated memory is still 1.0 GB. Free memory is still 944.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 404.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 944.1 MB in the beginning and 1.1 GB in the end (delta: -171.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3203.99 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.1 MB). Free memory was 1.1 GB in the beginning and 922.9 MB in the end (delta: 192.1 MB). Peak memory consumption was 259.2 MB. Max. memory is 11.5 GB. * Witness Printer took 4.65 ms. Allocated memory is still 1.2 GB. Free memory is still 922.9 MB. 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_add ; [L222] unsigned int zero ; [L223] int sa ; [L224] int sb ; [L225] int tmp ; [L226] int tmp___0 ; [L227] int tmp___1 ; [L228] int tmp___2 ; [L229] int tmp___3 ; [L230] int tmp___4 ; [L231] int tmp___5 ; [L232] int tmp___6 ; [L233] int tmp___7 ; [L234] int tmp___8 ; [L235] int tmp___9 ; [L236] int __retres23 ; VAL [ea=127, eb=0, ma=33554432, mb=16777216] [L240] 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] [L240] EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=0, ma=33554432, mb=16777216] [L240] zero = base2flt(0, 0) [L241] 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] [L241] EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967295, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L241] a = base2flt(ma, ea) [L242] 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=16777215, e=0, res=16777215] [L70] RET return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=-72057589726183425, __retres4=16777215, e=0, res=16777215] [L242] EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=-72057589726183425, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L242] b = base2flt(mb, eb) [L244] COND FALSE !(a < zero) VAL [a=4294967295, b=16777215, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L247] COND TRUE a > zero [L248] tmp = 1 VAL [a=4294967295, b=16777215, ea=127, eb=0, ma=33554432, mb=16777216, tmp=1, zero=0] [L252] sa = tmp VAL [a=4294967295, b=16777215, ea=127, eb=0, ma=33554432, mb=16777216, sa=1, tmp=1, zero=0] [L254] COND FALSE !(b < zero) VAL [a=4294967295, b=16777215, ea=127, eb=0, ma=33554432, mb=16777216, sa=1, tmp=1, zero=0] [L257] COND TRUE b > zero [L258] tmp___0 = 1 VAL [a=4294967295, b=16777215, ea=127, eb=0, ma=33554432, mb=16777216, sa=1, tmp=1, tmp___0=1, zero=0] [L262] sb = tmp___0 VAL [a=4294967295, b=16777215, ea=127, eb=0, ma=33554432, mb=16777216, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L265] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=16777215] [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)=16777215, a=4294967295, b=16777215] [L84] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=16777215, a=4294967295, b=16777215] [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)=16777215, a=4294967295, b=16777215, ea=127, eb=128] [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, 93 locations, 1 error locations. UNSAFE Result, 3.1s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 1.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 839 SDtfs, 623 SDslu, 5877 SDs, 0 SdLazy, 2077 SolverSat, 73 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 226 GetRequests, 123 SyntacticMatches, 8 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=304occurred 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: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 149 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 511 NumberOfCodeBlocks, 511 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 451 ConstructedInterpolants, 1 QuantifiedInterpolants, 56498 SizeOfPredicates, 13 NumberOfNonLiveVariables, 371 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 115/163 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 10:33:02,633 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 10:33:02,634 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 10:33:02,643 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 10:33:02,643 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 10:33:02,644 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 10:33:02,645 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 10:33:02,646 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 10:33:02,647 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 10:33:02,648 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 10:33:02,648 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 10:33:02,648 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 10:33:02,650 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 10:33:02,650 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 10:33:02,651 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 10:33:02,652 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 10:33:02,652 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 10:33:02,653 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 10:33:02,655 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 10:33:02,656 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 10:33:02,657 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 10:33:02,658 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 10:33:02,660 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 10:33:02,660 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 10:33:02,660 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 10:33:02,661 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 10:33:02,662 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 10:33:02,662 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 10:33:02,663 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 10:33:02,664 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 10:33:02,665 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 10:33:02,665 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 10:33:02,665 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 10:33:02,665 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 10:33:02,666 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 10:33:02,666 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 10:33:02,667 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-11-10 10:33:02,677 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 10:33:02,678 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 10:33:02,678 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 10:33:02,678 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 10:33:02,679 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 10:33:02,679 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 10:33:02,679 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 10:33:02,680 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 10:33:02,680 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 10:33:02,680 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 10:33:02,680 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 10:33:02,680 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 10:33:02,680 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 10:33:02,680 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 10:33:02,681 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-10 10:33:02,681 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-10 10:33:02,681 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 10:33:02,681 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 10:33:02,681 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 10:33:02,681 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 10:33:02,681 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 10:33:02,682 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 10:33:02,682 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 10:33:02,682 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 10:33:02,682 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 10:33:02,682 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 10:33:02,682 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 10:33:02,682 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-11-10 10:33:02,685 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 10:33:02,685 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-10 10:33:02,685 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-10 10:33:02,685 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_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 -> f756365182c9801d4a2ac186a40692687a86b469 [2018-11-10 10:33:02,714 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 10:33:02,723 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 10:33:02,726 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 10:33:02,727 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 10:33:02,728 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 10:33:02,728 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/../../sv-benchmarks/c/bitvector/soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 10:33:02,774 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/data/9ddbdf151/bdebdbd494f24477920c2fd778dbe889/FLAGb85505b55 [2018-11-10 10:33:03,188 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 10:33:03,188 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/sv-benchmarks/c/bitvector/soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 10:33:03,193 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/data/9ddbdf151/bdebdbd494f24477920c2fd778dbe889/FLAGb85505b55 [2018-11-10 10:33:03,201 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/data/9ddbdf151/bdebdbd494f24477920c2fd778dbe889 [2018-11-10 10:33:03,203 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 10:33:03,203 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 10:33:03,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 10:33:03,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 10:33:03,207 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 10:33:03,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:33:03" (1/1) ... [2018-11-10 10:33:03,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f5a247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:33:03, skipping insertion in model container [2018-11-10 10:33:03,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:33:03" (1/1) ... [2018-11-10 10:33:03,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 10:33:03,237 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 10:33:03,391 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 10:33:03,394 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 10:33:03,433 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 10:33:03,444 INFO L193 MainTranslator]: Completed translation [2018-11-10 10:33:03,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:33:03 WrapperNode [2018-11-10 10:33:03,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 10:33:03,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 10:33:03,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 10:33:03,445 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 10:33:03,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:33:03" (1/1) ... [2018-11-10 10:33:03,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:33:03" (1/1) ... [2018-11-10 10:33:03,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:33:03" (1/1) ... [2018-11-10 10:33:03,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:33:03" (1/1) ... [2018-11-10 10:33:03,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:33:03" (1/1) ... [2018-11-10 10:33:03,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:33:03" (1/1) ... [2018-11-10 10:33:03,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:33:03" (1/1) ... [2018-11-10 10:33:03,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 10:33:03,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 10:33:03,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 10:33:03,482 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 10:33:03,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:33:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:03,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 10:33:03,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 10:33:03,564 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 10:33:03,564 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2018-11-10 10:33:03,564 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2018-11-10 10:33:03,564 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2018-11-10 10:33:03,565 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 10:33:03,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 10:33:03,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-11-10 10:33:03,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-11-10 10:33:03,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 10:33:03,565 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2018-11-10 10:33:03,565 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2018-11-10 10:33:03,565 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2018-11-10 10:33:03,566 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 10:33:03,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 10:33:03,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 10:33:03,908 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 10:33:03,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 10:33:03 BoogieIcfgContainer [2018-11-10 10:33:03,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 10:33:03,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 10:33:03,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 10:33:03,912 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 10:33:03,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:33:03" (1/3) ... [2018-11-10 10:33:03,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe6e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:33:03, skipping insertion in model container [2018-11-10 10:33:03,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:33:03" (2/3) ... [2018-11-10 10:33:03,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe6e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:33:03, skipping insertion in model container [2018-11-10 10:33:03,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 10:33:03" (3/3) ... [2018-11-10 10:33:03,916 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1_true-unreach-call_true-no-overflow_true-termination.c.cil.c [2018-11-10 10:33:03,923 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 10:33:03,929 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 10:33:03,941 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 10:33:03,962 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 10:33:03,962 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 10:33:03,962 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 10:33:03,962 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 10:33:03,962 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 10:33:03,962 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 10:33:03,962 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 10:33:03,962 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 10:33:03,962 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 10:33:03,974 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2018-11-10 10:33:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-10 10:33:03,978 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:03,979 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, 1, 1] [2018-11-10 10:33:03,980 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:03,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:03,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1652746855, now seen corresponding path program 1 times [2018-11-10 10:33:03,986 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:03,986 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:03,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:04,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:04,094 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 10:33:04,095 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:04,100 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:04,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 10:33:04,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 10:33:04,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 10:33:04,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-10 10:33:04,118 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 8 states. [2018-11-10 10:33:04,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:04,305 INFO L93 Difference]: Finished difference Result 197 states and 312 transitions. [2018-11-10 10:33:04,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 10:33:04,306 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2018-11-10 10:33:04,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:04,316 INFO L225 Difference]: With dead ends: 197 [2018-11-10 10:33:04,317 INFO L226 Difference]: Without dead ends: 116 [2018-11-10 10:33:04,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 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 10:33:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-11-10 10:33:04,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2018-11-10 10:33:04,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-10 10:33:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 158 transitions. [2018-11-10 10:33:04,353 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 158 transitions. Word has length 36 [2018-11-10 10:33:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:04,354 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 158 transitions. [2018-11-10 10:33:04,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 10:33:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 158 transitions. [2018-11-10 10:33:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-10 10:33:04,357 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:04,357 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, 1, 1] [2018-11-10 10:33:04,357 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:04,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:04,358 INFO L82 PathProgramCache]: Analyzing trace with hash -812400415, now seen corresponding path program 1 times [2018-11-10 10:33:04,358 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:04,359 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:04,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:04,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 10:33:04,430 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:33:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-10 10:33:04,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:33:04,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-10 10:33:04,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 10:33:04,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 10:33:04,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:33:04,517 INFO L87 Difference]: Start difference. First operand 109 states and 158 transitions. Second operand 6 states. [2018-11-10 10:33:04,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:04,579 INFO L93 Difference]: Finished difference Result 242 states and 365 transitions. [2018-11-10 10:33:04,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 10:33:04,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2018-11-10 10:33:04,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:04,583 INFO L225 Difference]: With dead ends: 242 [2018-11-10 10:33:04,583 INFO L226 Difference]: Without dead ends: 169 [2018-11-10 10:33:04,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 1 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 10:33:04,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-11-10 10:33:04,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 123. [2018-11-10 10:33:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-11-10 10:33:04,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2018-11-10 10:33:04,600 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 41 [2018-11-10 10:33:04,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:04,600 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2018-11-10 10:33:04,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 10:33:04,601 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2018-11-10 10:33:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-10 10:33:04,602 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:04,602 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, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:04,602 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:04,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:04,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1280900227, now seen corresponding path program 1 times [2018-11-10 10:33:04,604 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:04,604 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:04,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:04,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:04,790 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 10:33:04,790 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:04,795 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:04,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-11-10 10:33:04,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 10:33:04,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 10:33:04,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-10 10:33:04,796 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand 10 states. [2018-11-10 10:33:05,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:05,265 INFO L93 Difference]: Finished difference Result 288 states and 443 transitions. [2018-11-10 10:33:05,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 10:33:05,266 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2018-11-10 10:33:05,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:05,268 INFO L225 Difference]: With dead ends: 288 [2018-11-10 10:33:05,268 INFO L226 Difference]: Without dead ends: 246 [2018-11-10 10:33:05,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-11-10 10:33:05,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-11-10 10:33:05,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 175. [2018-11-10 10:33:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-11-10 10:33:05,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 258 transitions. [2018-11-10 10:33:05,288 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 258 transitions. Word has length 45 [2018-11-10 10:33:05,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:05,289 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 258 transitions. [2018-11-10 10:33:05,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 10:33:05,289 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 258 transitions. [2018-11-10 10:33:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-10 10:33:05,291 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:05,292 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, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:05,292 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:05,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:05,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1223641925, now seen corresponding path program 1 times [2018-11-10 10:33:05,292 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:05,293 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:05,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:05,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:05,394 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 10:33:05,395 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:33:05,431 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 10:33:05,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:33:05,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-10 10:33:05,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 10:33:05,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 10:33:05,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-10 10:33:05,437 INFO L87 Difference]: Start difference. First operand 175 states and 258 transitions. Second operand 9 states. [2018-11-10 10:33:05,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:05,575 INFO L93 Difference]: Finished difference Result 419 states and 622 transitions. [2018-11-10 10:33:05,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 10:33:05,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2018-11-10 10:33:05,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:05,577 INFO L225 Difference]: With dead ends: 419 [2018-11-10 10:33:05,577 INFO L226 Difference]: Without dead ends: 306 [2018-11-10 10:33:05,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-11-10 10:33:05,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-11-10 10:33:05,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 279. [2018-11-10 10:33:05,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-11-10 10:33:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 400 transitions. [2018-11-10 10:33:05,601 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 400 transitions. Word has length 45 [2018-11-10 10:33:05,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:05,601 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 400 transitions. [2018-11-10 10:33:05,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 10:33:05,602 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 400 transitions. [2018-11-10 10:33:05,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 10:33:05,604 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:05,604 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:05,605 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:05,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:05,605 INFO L82 PathProgramCache]: Analyzing trace with hash -775161259, now seen corresponding path program 1 times [2018-11-10 10:33:05,606 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:05,606 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:05,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:05,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:33:05,664 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:05,665 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:05,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-10 10:33:05,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 10:33:05,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 10:33:05,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-10 10:33:05,666 INFO L87 Difference]: Start difference. First operand 279 states and 400 transitions. Second operand 7 states. [2018-11-10 10:33:05,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:05,825 INFO L93 Difference]: Finished difference Result 443 states and 653 transitions. [2018-11-10 10:33:05,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 10:33:05,827 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2018-11-10 10:33:05,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:05,829 INFO L225 Difference]: With dead ends: 443 [2018-11-10 10:33:05,830 INFO L226 Difference]: Without dead ends: 366 [2018-11-10 10:33:05,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-11-10 10:33:05,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2018-11-10 10:33:05,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 293. [2018-11-10 10:33:05,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-11-10 10:33:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 420 transitions. [2018-11-10 10:33:05,850 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 420 transitions. Word has length 49 [2018-11-10 10:33:05,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:05,850 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 420 transitions. [2018-11-10 10:33:05,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 10:33:05,850 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 420 transitions. [2018-11-10 10:33:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 10:33:05,851 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:05,851 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:05,852 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:05,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:05,852 INFO L82 PathProgramCache]: Analyzing trace with hash -717902957, now seen corresponding path program 1 times [2018-11-10 10:33:05,852 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:05,852 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:05,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:05,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:33:05,907 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:05,909 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:05,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 10:33:05,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 10:33:05,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 10:33:05,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 10:33:05,910 INFO L87 Difference]: Start difference. First operand 293 states and 420 transitions. Second operand 4 states. [2018-11-10 10:33:05,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:05,957 INFO L93 Difference]: Finished difference Result 499 states and 730 transitions. [2018-11-10 10:33:05,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 10:33:05,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2018-11-10 10:33:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:05,965 INFO L225 Difference]: With dead ends: 499 [2018-11-10 10:33:05,965 INFO L226 Difference]: Without dead ends: 390 [2018-11-10 10:33:05,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:33:05,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2018-11-10 10:33:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 338. [2018-11-10 10:33:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2018-11-10 10:33:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 479 transitions. [2018-11-10 10:33:06,000 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 479 transitions. Word has length 49 [2018-11-10 10:33:06,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:06,001 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 479 transitions. [2018-11-10 10:33:06,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 10:33:06,001 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 479 transitions. [2018-11-10 10:33:06,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 10:33:06,002 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:06,002 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:06,002 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:06,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:06,003 INFO L82 PathProgramCache]: Analyzing trace with hash 868240635, now seen corresponding path program 1 times [2018-11-10 10:33:06,003 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:06,003 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/cvc4nyu Starting monitored process 8 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 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 10:33:06,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:06,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:33:06,075 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:06,076 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:06,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 10:33:06,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 10:33:06,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 10:33:06,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:33:06,077 INFO L87 Difference]: Start difference. First operand 338 states and 479 transitions. Second operand 5 states. [2018-11-10 10:33:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:06,121 INFO L93 Difference]: Finished difference Result 345 states and 485 transitions. [2018-11-10 10:33:06,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 10:33:06,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2018-11-10 10:33:06,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:06,123 INFO L225 Difference]: With dead ends: 345 [2018-11-10 10:33:06,123 INFO L226 Difference]: Without dead ends: 338 [2018-11-10 10:33:06,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:33:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-11-10 10:33:06,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2018-11-10 10:33:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2018-11-10 10:33:06,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 475 transitions. [2018-11-10 10:33:06,136 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 475 transitions. Word has length 50 [2018-11-10 10:33:06,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:06,137 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 475 transitions. [2018-11-10 10:33:06,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 10:33:06,137 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 475 transitions. [2018-11-10 10:33:06,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 10:33:06,138 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:06,138 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, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:06,138 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:06,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:06,138 INFO L82 PathProgramCache]: Analyzing trace with hash 162502823, now seen corresponding path program 2 times [2018-11-10 10:33:06,138 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:06,138 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:06,161 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 10:33:06,193 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-11-10 10:33:06,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:33:06,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:06,315 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 10:33:06,316 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:06,320 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:06,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 10:33:06,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 10:33:06,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 10:33:06,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-10 10:33:06,321 INFO L87 Difference]: Start difference. First operand 338 states and 475 transitions. Second operand 12 states. [2018-11-10 10:33:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:06,686 INFO L93 Difference]: Finished difference Result 450 states and 621 transitions. [2018-11-10 10:33:06,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-10 10:33:06,687 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2018-11-10 10:33:06,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:06,688 INFO L225 Difference]: With dead ends: 450 [2018-11-10 10:33:06,689 INFO L226 Difference]: Without dead ends: 384 [2018-11-10 10:33:06,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2018-11-10 10:33:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2018-11-10 10:33:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 368. [2018-11-10 10:33:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2018-11-10 10:33:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 507 transitions. [2018-11-10 10:33:06,709 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 507 transitions. Word has length 50 [2018-11-10 10:33:06,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:06,709 INFO L481 AbstractCegarLoop]: Abstraction has 368 states and 507 transitions. [2018-11-10 10:33:06,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 10:33:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 507 transitions. [2018-11-10 10:33:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 10:33:06,711 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:06,711 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] [2018-11-10 10:33:06,711 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:06,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:06,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1369751255, now seen corresponding path program 1 times [2018-11-10 10:33:06,711 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:06,712 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:06,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:33:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:06,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 10:33:06,813 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:33:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 10:33:06,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:33:06,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-11-10 10:33:06,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 10:33:06,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 10:33:06,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2018-11-10 10:33:06,916 INFO L87 Difference]: Start difference. First operand 368 states and 507 transitions. Second operand 16 states. [2018-11-10 10:33:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:07,285 INFO L93 Difference]: Finished difference Result 991 states and 1396 transitions. [2018-11-10 10:33:07,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 10:33:07,286 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2018-11-10 10:33:07,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:07,290 INFO L225 Difference]: With dead ends: 991 [2018-11-10 10:33:07,290 INFO L226 Difference]: Without dead ends: 850 [2018-11-10 10:33:07,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2018-11-10 10:33:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2018-11-10 10:33:07,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 417. [2018-11-10 10:33:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2018-11-10 10:33:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 582 transitions. [2018-11-10 10:33:07,321 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 582 transitions. Word has length 50 [2018-11-10 10:33:07,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:07,322 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 582 transitions. [2018-11-10 10:33:07,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 10:33:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 582 transitions. [2018-11-10 10:33:07,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 10:33:07,323 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:07,323 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] [2018-11-10 10:33:07,323 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:07,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:07,323 INFO L82 PathProgramCache]: Analyzing trace with hash -782945241, now seen corresponding path program 1 times [2018-11-10 10:33:07,324 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:07,324 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:07,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:07,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:07,450 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 10:33:07,450 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:33:07,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:33:07,610 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:33:07,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:07,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:07,657 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 10:33:07,657 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:33:07,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:33:07,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-10 10:33:07,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 10:33:07,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 10:33:07,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2018-11-10 10:33:07,681 INFO L87 Difference]: Start difference. First operand 417 states and 582 transitions. Second operand 11 states. [2018-11-10 10:33:07,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:07,940 INFO L93 Difference]: Finished difference Result 798 states and 1123 transitions. [2018-11-10 10:33:07,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 10:33:07,940 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2018-11-10 10:33:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:07,942 INFO L225 Difference]: With dead ends: 798 [2018-11-10 10:33:07,942 INFO L226 Difference]: Without dead ends: 613 [2018-11-10 10:33:07,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 115 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 10:33:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2018-11-10 10:33:07,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 485. [2018-11-10 10:33:07,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2018-11-10 10:33:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 665 transitions. [2018-11-10 10:33:07,964 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 665 transitions. Word has length 50 [2018-11-10 10:33:07,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:07,965 INFO L481 AbstractCegarLoop]: Abstraction has 485 states and 665 transitions. [2018-11-10 10:33:07,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 10:33:07,965 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 665 transitions. [2018-11-10 10:33:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 10:33:07,967 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:07,967 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, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:07,967 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:07,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:07,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1009807981, now seen corresponding path program 1 times [2018-11-10 10:33:07,967 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:07,967 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:07,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:07,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:08,039 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 10:33:08,039 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:08,041 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:08,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 10:33:08,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 10:33:08,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 10:33:08,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:33:08,042 INFO L87 Difference]: Start difference. First operand 485 states and 665 transitions. Second operand 6 states. [2018-11-10 10:33:08,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:08,391 INFO L93 Difference]: Finished difference Result 795 states and 1107 transitions. [2018-11-10 10:33:08,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 10:33:08,393 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2018-11-10 10:33:08,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:08,394 INFO L225 Difference]: With dead ends: 795 [2018-11-10 10:33:08,395 INFO L226 Difference]: Without dead ends: 702 [2018-11-10 10:33:08,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 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 10:33:08,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2018-11-10 10:33:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 537. [2018-11-10 10:33:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2018-11-10 10:33:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 731 transitions. [2018-11-10 10:33:08,416 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 731 transitions. Word has length 50 [2018-11-10 10:33:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:08,416 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 731 transitions. [2018-11-10 10:33:08,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 10:33:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 731 transitions. [2018-11-10 10:33:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 10:33:08,418 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:08,418 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, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:08,418 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:08,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:08,418 INFO L82 PathProgramCache]: Analyzing trace with hash 952549679, now seen corresponding path program 1 times [2018-11-10 10:33:08,419 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:08,419 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:08,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:08,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 10:33:08,507 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:33:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 10:33:08,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:33:08,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-10 10:33:08,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 10:33:08,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 10:33:08,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-10 10:33:08,544 INFO L87 Difference]: Start difference. First operand 537 states and 731 transitions. Second operand 10 states. [2018-11-10 10:33:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:08,706 INFO L93 Difference]: Finished difference Result 921 states and 1245 transitions. [2018-11-10 10:33:08,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 10:33:08,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2018-11-10 10:33:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:08,709 INFO L225 Difference]: With dead ends: 921 [2018-11-10 10:33:08,709 INFO L226 Difference]: Without dead ends: 827 [2018-11-10 10:33:08,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-11-10 10:33:08,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2018-11-10 10:33:08,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 570. [2018-11-10 10:33:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 570 states. [2018-11-10 10:33:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 768 transitions. [2018-11-10 10:33:08,733 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 768 transitions. Word has length 50 [2018-11-10 10:33:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:08,734 INFO L481 AbstractCegarLoop]: Abstraction has 570 states and 768 transitions. [2018-11-10 10:33:08,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 10:33:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 768 transitions. [2018-11-10 10:33:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 10:33:08,735 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:08,735 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, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:08,735 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:08,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:08,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1596613995, now seen corresponding path program 1 times [2018-11-10 10:33:08,736 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:08,736 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:08,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:08,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:08,833 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 10:33:08,833 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:08,835 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:08,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 10:33:08,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 10:33:08,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 10:33:08,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:33:08,836 INFO L87 Difference]: Start difference. First operand 570 states and 768 transitions. Second operand 6 states. [2018-11-10 10:33:12,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:12,886 INFO L93 Difference]: Finished difference Result 605 states and 812 transitions. [2018-11-10 10:33:12,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 10:33:12,887 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2018-11-10 10:33:12,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:12,889 INFO L225 Difference]: With dead ends: 605 [2018-11-10 10:33:12,889 INFO L226 Difference]: Without dead ends: 603 [2018-11-10 10:33:12,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 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 10:33:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2018-11-10 10:33:12,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 574. [2018-11-10 10:33:12,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2018-11-10 10:33:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 771 transitions. [2018-11-10 10:33:12,913 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 771 transitions. Word has length 50 [2018-11-10 10:33:12,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:12,914 INFO L481 AbstractCegarLoop]: Abstraction has 574 states and 771 transitions. [2018-11-10 10:33:12,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 10:33:12,914 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 771 transitions. [2018-11-10 10:33:12,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-10 10:33:12,915 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:12,915 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:12,915 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:12,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:12,915 INFO L82 PathProgramCache]: Analyzing trace with hash 277073781, now seen corresponding path program 1 times [2018-11-10 10:33:12,916 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:12,916 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:12,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:12,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 10:33:12,973 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:12,975 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:12,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 10:33:12,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 10:33:12,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 10:33:12,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 10:33:12,976 INFO L87 Difference]: Start difference. First operand 574 states and 771 transitions. Second operand 4 states. [2018-11-10 10:33:13,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:13,034 INFO L93 Difference]: Finished difference Result 948 states and 1267 transitions. [2018-11-10 10:33:13,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 10:33:13,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2018-11-10 10:33:13,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:13,036 INFO L225 Difference]: With dead ends: 948 [2018-11-10 10:33:13,036 INFO L226 Difference]: Without dead ends: 380 [2018-11-10 10:33:13,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:33:13,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2018-11-10 10:33:13,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 366. [2018-11-10 10:33:13,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2018-11-10 10:33:13,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 477 transitions. [2018-11-10 10:33:13,054 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 477 transitions. Word has length 50 [2018-11-10 10:33:13,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:13,054 INFO L481 AbstractCegarLoop]: Abstraction has 366 states and 477 transitions. [2018-11-10 10:33:13,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 10:33:13,054 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 477 transitions. [2018-11-10 10:33:13,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-10 10:33:13,055 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:13,055 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:13,055 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:13,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:13,055 INFO L82 PathProgramCache]: Analyzing trace with hash -38296, now seen corresponding path program 1 times [2018-11-10 10:33:13,056 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:13,056 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:13,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:13,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:33:13,104 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:13,106 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:13,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 10:33:13,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 10:33:13,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 10:33:13,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 10:33:13,106 INFO L87 Difference]: Start difference. First operand 366 states and 477 transitions. Second operand 4 states. [2018-11-10 10:33:13,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:13,128 INFO L93 Difference]: Finished difference Result 383 states and 496 transitions. [2018-11-10 10:33:13,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 10:33:13,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2018-11-10 10:33:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:13,130 INFO L225 Difference]: With dead ends: 383 [2018-11-10 10:33:13,130 INFO L226 Difference]: Without dead ends: 327 [2018-11-10 10:33:13,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:33:13,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-11-10 10:33:13,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 311. [2018-11-10 10:33:13,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-11-10 10:33:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 401 transitions. [2018-11-10 10:33:13,145 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 401 transitions. Word has length 54 [2018-11-10 10:33:13,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:13,145 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 401 transitions. [2018-11-10 10:33:13,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 10:33:13,145 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 401 transitions. [2018-11-10 10:33:13,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-10 10:33:13,146 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:13,146 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:13,146 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:13,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:13,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1801519799, now seen corresponding path program 1 times [2018-11-10 10:33:13,147 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:13,147 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:13,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:13,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:33:13,207 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:13,208 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:13,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 10:33:13,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 10:33:13,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 10:33:13,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 10:33:13,209 INFO L87 Difference]: Start difference. First operand 311 states and 401 transitions. Second operand 4 states. [2018-11-10 10:33:13,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:13,235 INFO L93 Difference]: Finished difference Result 468 states and 623 transitions. [2018-11-10 10:33:13,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 10:33:13,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2018-11-10 10:33:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:13,236 INFO L225 Difference]: With dead ends: 468 [2018-11-10 10:33:13,236 INFO L226 Difference]: Without dead ends: 363 [2018-11-10 10:33:13,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:33:13,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-11-10 10:33:13,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 309. [2018-11-10 10:33:13,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-11-10 10:33:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 402 transitions. [2018-11-10 10:33:13,251 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 402 transitions. Word has length 54 [2018-11-10 10:33:13,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:13,251 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 402 transitions. [2018-11-10 10:33:13,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 10:33:13,251 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 402 transitions. [2018-11-10 10:33:13,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-10 10:33:13,252 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:13,253 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:13,253 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:13,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:13,253 INFO L82 PathProgramCache]: Analyzing trace with hash 358260584, now seen corresponding path program 1 times [2018-11-10 10:33:13,253 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:13,253 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:13,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:13,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:13,369 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 10:33:13,369 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:13,370 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:13,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 10:33:13,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 10:33:13,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 10:33:13,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-11-10 10:33:13,371 INFO L87 Difference]: Start difference. First operand 309 states and 402 transitions. Second operand 12 states. [2018-11-10 10:33:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:13,630 INFO L93 Difference]: Finished difference Result 382 states and 502 transitions. [2018-11-10 10:33:13,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 10:33:13,631 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2018-11-10 10:33:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:13,632 INFO L225 Difference]: With dead ends: 382 [2018-11-10 10:33:13,632 INFO L226 Difference]: Without dead ends: 357 [2018-11-10 10:33:13,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2018-11-10 10:33:13,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2018-11-10 10:33:13,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 328. [2018-11-10 10:33:13,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-11-10 10:33:13,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 429 transitions. [2018-11-10 10:33:13,650 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 429 transitions. Word has length 57 [2018-11-10 10:33:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:13,650 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 429 transitions. [2018-11-10 10:33:13,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 10:33:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 429 transitions. [2018-11-10 10:33:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-10 10:33:13,651 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:13,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:13,652 INFO L424 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:13,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:13,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1557147476, now seen corresponding path program 1 times [2018-11-10 10:33:13,652 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:13,652 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:13,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:13,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:33:13,742 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:13,744 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:13,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 10:33:13,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 10:33:13,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 10:33:13,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-10 10:33:13,744 INFO L87 Difference]: Start difference. First operand 328 states and 429 transitions. Second operand 8 states. [2018-11-10 10:33:13,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:13,929 INFO L93 Difference]: Finished difference Result 400 states and 528 transitions. [2018-11-10 10:33:13,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 10:33:13,929 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2018-11-10 10:33:13,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:13,930 INFO L225 Difference]: With dead ends: 400 [2018-11-10 10:33:13,930 INFO L226 Difference]: Without dead ends: 381 [2018-11-10 10:33:13,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-10 10:33:13,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2018-11-10 10:33:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 330. [2018-11-10 10:33:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2018-11-10 10:33:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 440 transitions. [2018-11-10 10:33:13,960 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 440 transitions. Word has length 57 [2018-11-10 10:33:13,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:13,960 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 440 transitions. [2018-11-10 10:33:13,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 10:33:13,961 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 440 transitions. [2018-11-10 10:33:13,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-10 10:33:13,962 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:13,962 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, 1, 1, 1, 1, 1] [2018-11-10 10:33:13,962 INFO L424 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:13,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:13,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1706498492, now seen corresponding path program 1 times [2018-11-10 10:33:13,963 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:13,963 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/cvc4nyu Starting monitored process 21 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 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 10:33:13,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:14,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:14,179 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 10:33:14,179 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:14,181 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:14,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2018-11-10 10:33:14,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 10:33:14,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 10:33:14,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-11-10 10:33:14,182 INFO L87 Difference]: Start difference. First operand 330 states and 440 transitions. Second operand 13 states. [2018-11-10 10:33:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:14,455 INFO L93 Difference]: Finished difference Result 397 states and 524 transitions. [2018-11-10 10:33:14,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 10:33:14,456 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2018-11-10 10:33:14,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:14,457 INFO L225 Difference]: With dead ends: 397 [2018-11-10 10:33:14,457 INFO L226 Difference]: Without dead ends: 351 [2018-11-10 10:33:14,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 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 10:33:14,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-11-10 10:33:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 325. [2018-11-10 10:33:14,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-11-10 10:33:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 432 transitions. [2018-11-10 10:33:14,481 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 432 transitions. Word has length 58 [2018-11-10 10:33:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:14,482 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 432 transitions. [2018-11-10 10:33:14,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 10:33:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 432 transitions. [2018-11-10 10:33:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-10 10:33:14,483 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:14,483 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, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:14,483 INFO L424 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:14,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:14,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1623225088, now seen corresponding path program 1 times [2018-11-10 10:33:14,484 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:14,484 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:14,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:14,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:14,668 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 10:33:14,669 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:33:14,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:33:14,767 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:33:14,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:14,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:14,831 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 10:33:14,832 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:33:14,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:33:14,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-10 10:33:14,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 10:33:14,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 10:33:14,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-11-10 10:33:14,910 INFO L87 Difference]: Start difference. First operand 325 states and 432 transitions. Second operand 11 states. [2018-11-10 10:33:15,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:15,203 INFO L93 Difference]: Finished difference Result 381 states and 505 transitions. [2018-11-10 10:33:15,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 10:33:15,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2018-11-10 10:33:15,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:15,204 INFO L225 Difference]: With dead ends: 381 [2018-11-10 10:33:15,204 INFO L226 Difference]: Without dead ends: 347 [2018-11-10 10:33:15,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-10 10:33:15,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-11-10 10:33:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 323. [2018-11-10 10:33:15,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-11-10 10:33:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 428 transitions. [2018-11-10 10:33:15,219 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 428 transitions. Word has length 58 [2018-11-10 10:33:15,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:15,219 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 428 transitions. [2018-11-10 10:33:15,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 10:33:15,219 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 428 transitions. [2018-11-10 10:33:15,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-10 10:33:15,220 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:15,220 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, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:15,220 INFO L424 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:15,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:15,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1394379582, now seen corresponding path program 1 times [2018-11-10 10:33:15,221 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:15,221 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:15,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:15,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:33:15,308 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:15,310 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:15,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-10 10:33:15,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 10:33:15,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 10:33:15,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-11-10 10:33:15,310 INFO L87 Difference]: Start difference. First operand 323 states and 428 transitions. Second operand 7 states. [2018-11-10 10:33:15,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:15,407 INFO L93 Difference]: Finished difference Result 428 states and 543 transitions. [2018-11-10 10:33:15,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 10:33:15,407 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2018-11-10 10:33:15,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:15,408 INFO L225 Difference]: With dead ends: 428 [2018-11-10 10:33:15,409 INFO L226 Difference]: Without dead ends: 346 [2018-11-10 10:33:15,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-10 10:33:15,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2018-11-10 10:33:15,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 310. [2018-11-10 10:33:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2018-11-10 10:33:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 407 transitions. [2018-11-10 10:33:15,430 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 407 transitions. Word has length 58 [2018-11-10 10:33:15,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:15,431 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 407 transitions. [2018-11-10 10:33:15,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 10:33:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 407 transitions. [2018-11-10 10:33:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-10 10:33:15,432 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:15,432 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, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:15,432 INFO L424 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:15,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:15,432 INFO L82 PathProgramCache]: Analyzing trace with hash -906443008, now seen corresponding path program 2 times [2018-11-10 10:33:15,432 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:15,433 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:15,453 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 10:33:15,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 10:33:15,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:33:15,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:15,660 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 10:33:15,660 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:15,662 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:15,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 10:33:15,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 10:33:15,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 10:33:15,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-11-10 10:33:15,663 INFO L87 Difference]: Start difference. First operand 310 states and 407 transitions. Second operand 12 states. [2018-11-10 10:33:15,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:15,923 INFO L93 Difference]: Finished difference Result 387 states and 498 transitions. [2018-11-10 10:33:15,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 10:33:15,923 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2018-11-10 10:33:15,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:15,924 INFO L225 Difference]: With dead ends: 387 [2018-11-10 10:33:15,924 INFO L226 Difference]: Without dead ends: 332 [2018-11-10 10:33:15,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2018-11-10 10:33:15,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2018-11-10 10:33:15,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 300. [2018-11-10 10:33:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-11-10 10:33:15,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 394 transitions. [2018-11-10 10:33:15,947 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 394 transitions. Word has length 58 [2018-11-10 10:33:15,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:15,947 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 394 transitions. [2018-11-10 10:33:15,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 10:33:15,947 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 394 transitions. [2018-11-10 10:33:15,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-10 10:33:15,948 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:15,949 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, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:15,949 INFO L424 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:15,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:15,949 INFO L82 PathProgramCache]: Analyzing trace with hash 104674242, now seen corresponding path program 1 times [2018-11-10 10:33:15,949 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:15,949 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:15,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:33:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:16,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:16,105 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 10:33:16,105 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:16,106 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:16,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 10:33:16,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 10:33:16,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 10:33:16,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-11-10 10:33:16,106 INFO L87 Difference]: Start difference. First operand 300 states and 394 transitions. Second operand 12 states. [2018-11-10 10:33:16,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:16,468 INFO L93 Difference]: Finished difference Result 374 states and 480 transitions. [2018-11-10 10:33:16,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 10:33:16,468 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2018-11-10 10:33:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:16,469 INFO L225 Difference]: With dead ends: 374 [2018-11-10 10:33:16,470 INFO L226 Difference]: Without dead ends: 333 [2018-11-10 10:33:16,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 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 10:33:16,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-11-10 10:33:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 297. [2018-11-10 10:33:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-11-10 10:33:16,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 389 transitions. [2018-11-10 10:33:16,492 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 389 transitions. Word has length 58 [2018-11-10 10:33:16,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:16,492 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 389 transitions. [2018-11-10 10:33:16,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 10:33:16,492 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 389 transitions. [2018-11-10 10:33:16,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-10 10:33:16,493 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:16,493 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, 1, 1, 1, 1, 1] [2018-11-10 10:33:16,493 INFO L424 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:16,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:16,493 INFO L82 PathProgramCache]: Analyzing trace with hash 58800708, now seen corresponding path program 1 times [2018-11-10 10:33:16,494 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:16,494 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:16,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:16,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:19,786 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 10:33:19,786 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:19,787 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:19,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 10:33:19,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 10:33:19,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 10:33:19,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2018-11-10 10:33:19,788 INFO L87 Difference]: Start difference. First operand 297 states and 389 transitions. Second operand 8 states. [2018-11-10 10:33:36,822 WARN L179 SmtUtils]: Spent 6.65 s on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2018-11-10 10:33:36,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:36,931 INFO L93 Difference]: Finished difference Result 320 states and 414 transitions. [2018-11-10 10:33:36,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 10:33:36,931 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2018-11-10 10:33:36,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:36,933 INFO L225 Difference]: With dead ends: 320 [2018-11-10 10:33:36,933 INFO L226 Difference]: Without dead ends: 318 [2018-11-10 10:33:36,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=27, Invalid=61, Unknown=2, NotChecked=0, Total=90 [2018-11-10 10:33:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-11-10 10:33:36,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 302. [2018-11-10 10:33:36,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-11-10 10:33:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 394 transitions. [2018-11-10 10:33:36,955 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 394 transitions. Word has length 58 [2018-11-10 10:33:36,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:36,955 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 394 transitions. [2018-11-10 10:33:36,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 10:33:36,955 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 394 transitions. [2018-11-10 10:33:36,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-10 10:33:36,956 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:36,956 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:36,956 INFO L424 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:36,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:36,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1323559625, now seen corresponding path program 1 times [2018-11-10 10:33:36,957 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:36,957 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:36,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:36,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:37,022 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 10:33:37,022 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:37,023 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:37,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 10:33:37,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 10:33:37,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 10:33:37,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:33:37,024 INFO L87 Difference]: Start difference. First operand 302 states and 394 transitions. Second operand 6 states. [2018-11-10 10:33:37,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:33:37,113 INFO L93 Difference]: Finished difference Result 375 states and 487 transitions. [2018-11-10 10:33:37,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 10:33:37,114 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2018-11-10 10:33:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:33:37,115 INFO L225 Difference]: With dead ends: 375 [2018-11-10 10:33:37,115 INFO L226 Difference]: Without dead ends: 324 [2018-11-10 10:33:37,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 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 10:33:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2018-11-10 10:33:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 302. [2018-11-10 10:33:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-11-10 10:33:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 392 transitions. [2018-11-10 10:33:37,136 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 392 transitions. Word has length 57 [2018-11-10 10:33:37,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:33:37,136 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 392 transitions. [2018-11-10 10:33:37,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 10:33:37,136 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 392 transitions. [2018-11-10 10:33:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-10 10:33:37,137 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:33:37,137 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, 1, 1, 1, 1, 1, 1] [2018-11-10 10:33:37,137 INFO L424 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:33:37,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:33:37,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1594024368, now seen corresponding path program 1 times [2018-11-10 10:33:37,137 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:33:37,138 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:33:37,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:33:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:33:37,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:33:45,344 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 10:33:45,344 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:33:45,345 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:33:45,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 10:33:45,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 10:33:45,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 10:33:45,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=37, Unknown=4, NotChecked=0, Total=56 [2018-11-10 10:33:45,346 INFO L87 Difference]: Start difference. First operand 302 states and 392 transitions. Second operand 8 states. [2018-11-10 10:34:03,703 WARN L179 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 21 [2018-11-10 10:34:16,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:16,250 INFO L93 Difference]: Finished difference Result 318 states and 408 transitions. [2018-11-10 10:34:16,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 10:34:16,251 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2018-11-10 10:34:16,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:16,252 INFO L225 Difference]: With dead ends: 318 [2018-11-10 10:34:16,252 INFO L226 Difference]: Without dead ends: 316 [2018-11-10 10:34:16,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=23, Invalid=61, Unknown=6, NotChecked=0, Total=90 [2018-11-10 10:34:16,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2018-11-10 10:34:16,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 301. [2018-11-10 10:34:16,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-11-10 10:34:16,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 390 transitions. [2018-11-10 10:34:16,267 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 390 transitions. Word has length 59 [2018-11-10 10:34:16,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:16,267 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 390 transitions. [2018-11-10 10:34:16,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 10:34:16,267 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 390 transitions. [2018-11-10 10:34:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-10 10:34:16,268 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:16,268 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:34:16,268 INFO L424 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:16,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:16,268 INFO L82 PathProgramCache]: Analyzing trace with hash -924244380, now seen corresponding path program 1 times [2018-11-10 10:34:16,269 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:16,269 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:34:16,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:16,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:34:16,312 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:34:16,314 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:34:16,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 10:34:16,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 10:34:16,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 10:34:16,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 10:34:16,314 INFO L87 Difference]: Start difference. First operand 301 states and 390 transitions. Second operand 4 states. [2018-11-10 10:34:16,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:16,334 INFO L93 Difference]: Finished difference Result 310 states and 398 transitions. [2018-11-10 10:34:16,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 10:34:16,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2018-11-10 10:34:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:16,336 INFO L225 Difference]: With dead ends: 310 [2018-11-10 10:34:16,336 INFO L226 Difference]: Without dead ends: 265 [2018-11-10 10:34:16,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:34:16,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-11-10 10:34:16,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 255. [2018-11-10 10:34:16,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-11-10 10:34:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 322 transitions. [2018-11-10 10:34:16,347 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 322 transitions. Word has length 59 [2018-11-10 10:34:16,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:16,347 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 322 transitions. [2018-11-10 10:34:16,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 10:34:16,347 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 322 transitions. [2018-11-10 10:34:16,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-10 10:34:16,348 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:16,348 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, 1, 1, 1] [2018-11-10 10:34:16,348 INFO L424 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:16,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:16,348 INFO L82 PathProgramCache]: Analyzing trace with hash 770443443, now seen corresponding path program 1 times [2018-11-10 10:34:16,348 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:16,348 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:34:16,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:16,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-10 10:34:16,393 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:34:16,394 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:34:16,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 10:34:16,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 10:34:16,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 10:34:16,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:34:16,394 INFO L87 Difference]: Start difference. First operand 255 states and 322 transitions. Second operand 5 states. [2018-11-10 10:34:16,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:16,463 INFO L93 Difference]: Finished difference Result 304 states and 381 transitions. [2018-11-10 10:34:16,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 10:34:16,463 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2018-11-10 10:34:16,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:16,464 INFO L225 Difference]: With dead ends: 304 [2018-11-10 10:34:16,464 INFO L226 Difference]: Without dead ends: 281 [2018-11-10 10:34:16,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:34:16,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-11-10 10:34:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 255. [2018-11-10 10:34:16,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-11-10 10:34:16,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 320 transitions. [2018-11-10 10:34:16,475 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 320 transitions. Word has length 59 [2018-11-10 10:34:16,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:16,476 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 320 transitions. [2018-11-10 10:34:16,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 10:34:16,476 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 320 transitions. [2018-11-10 10:34:16,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-10 10:34:16,476 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:16,477 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:34:16,477 INFO L424 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:16,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:16,477 INFO L82 PathProgramCache]: Analyzing trace with hash -794801909, now seen corresponding path program 1 times [2018-11-10 10:34:16,477 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:16,477 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:34:16,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:16,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:16,550 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 10:34:16,550 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:34:16,552 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:34:16,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-10 10:34:16,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 10:34:16,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 10:34:16,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-10 10:34:16,553 INFO L87 Difference]: Start difference. First operand 255 states and 320 transitions. Second operand 8 states. [2018-11-10 10:34:16,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:16,725 INFO L93 Difference]: Finished difference Result 352 states and 455 transitions. [2018-11-10 10:34:16,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 10:34:16,725 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2018-11-10 10:34:16,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:16,726 INFO L225 Difference]: With dead ends: 352 [2018-11-10 10:34:16,726 INFO L226 Difference]: Without dead ends: 312 [2018-11-10 10:34:16,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-10 10:34:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-11-10 10:34:16,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 290. [2018-11-10 10:34:16,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-11-10 10:34:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 370 transitions. [2018-11-10 10:34:16,741 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 370 transitions. Word has length 64 [2018-11-10 10:34:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:16,742 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 370 transitions. [2018-11-10 10:34:16,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 10:34:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 370 transitions. [2018-11-10 10:34:16,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-10 10:34:16,743 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:16,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:34:16,743 INFO L424 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:16,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:16,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1968138788, now seen corresponding path program 1 times [2018-11-10 10:34:16,743 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:16,744 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:34:16,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:16,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:16,792 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 10:34:16,792 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:34:16,793 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:34:16,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 10:34:16,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 10:34:16,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 10:34:16,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:34:16,793 INFO L87 Difference]: Start difference. First operand 290 states and 370 transitions. Second operand 6 states. [2018-11-10 10:34:16,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:16,851 INFO L93 Difference]: Finished difference Result 384 states and 503 transitions. [2018-11-10 10:34:16,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 10:34:16,851 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2018-11-10 10:34:16,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:16,852 INFO L225 Difference]: With dead ends: 384 [2018-11-10 10:34:16,852 INFO L226 Difference]: Without dead ends: 306 [2018-11-10 10:34:16,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 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 10:34:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-11-10 10:34:16,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 267. [2018-11-10 10:34:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-11-10 10:34:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 324 transitions. [2018-11-10 10:34:16,871 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 324 transitions. Word has length 66 [2018-11-10 10:34:16,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:16,871 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 324 transitions. [2018-11-10 10:34:16,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 10:34:16,871 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 324 transitions. [2018-11-10 10:34:16,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-10 10:34:16,872 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:16,872 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:34:16,872 INFO L424 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:16,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:16,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2061521193, now seen corresponding path program 1 times [2018-11-10 10:34:16,873 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:16,873 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:34:16,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:16,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-10 10:34:16,949 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:34:16,950 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:34:16,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 10:34:16,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 10:34:16,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 10:34:16,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:34:16,951 INFO L87 Difference]: Start difference. First operand 267 states and 324 transitions. Second operand 6 states. [2018-11-10 10:34:16,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:16,987 INFO L93 Difference]: Finished difference Result 308 states and 376 transitions. [2018-11-10 10:34:16,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 10:34:16,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2018-11-10 10:34:16,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:16,988 INFO L225 Difference]: With dead ends: 308 [2018-11-10 10:34:16,988 INFO L226 Difference]: Without dead ends: 306 [2018-11-10 10:34:16,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 61 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 10:34:16,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-11-10 10:34:17,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 276. [2018-11-10 10:34:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-11-10 10:34:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 335 transitions. [2018-11-10 10:34:17,001 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 335 transitions. Word has length 66 [2018-11-10 10:34:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:17,001 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 335 transitions. [2018-11-10 10:34:17,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 10:34:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 335 transitions. [2018-11-10 10:34:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-10 10:34:17,002 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:17,002 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:34:17,002 INFO L424 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:17,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:17,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1296721069, now seen corresponding path program 1 times [2018-11-10 10:34:17,002 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:17,002 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/cvc4nyu Starting monitored process 35 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 35 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 10:34:17,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:17,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-10 10:34:17,075 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:34:17,076 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:34:17,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 10:34:17,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 10:34:17,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 10:34:17,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:34:17,076 INFO L87 Difference]: Start difference. First operand 276 states and 335 transitions. Second operand 6 states. [2018-11-10 10:34:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:17,113 INFO L93 Difference]: Finished difference Result 305 states and 367 transitions. [2018-11-10 10:34:17,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 10:34:17,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2018-11-10 10:34:17,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:17,114 INFO L225 Difference]: With dead ends: 305 [2018-11-10 10:34:17,115 INFO L226 Difference]: Without dead ends: 303 [2018-11-10 10:34:17,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 61 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 10:34:17,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-11-10 10:34:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 280. [2018-11-10 10:34:17,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-11-10 10:34:17,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 338 transitions. [2018-11-10 10:34:17,127 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 338 transitions. Word has length 66 [2018-11-10 10:34:17,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:17,127 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 338 transitions. [2018-11-10 10:34:17,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 10:34:17,127 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 338 transitions. [2018-11-10 10:34:17,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-10 10:34:17,128 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:17,128 INFO L375 BasicCegarLoop]: trace histogram [3, 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 10:34:17,128 INFO L424 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:17,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:17,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1166908399, now seen corresponding path program 1 times [2018-11-10 10:34:17,128 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:17,128 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:34:17,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:17,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-10 10:34:17,546 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:34:17,547 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:34:17,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-11-10 10:34:17,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 10:34:17,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 10:34:17,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-11-10 10:34:17,548 INFO L87 Difference]: Start difference. First operand 280 states and 338 transitions. Second operand 11 states. [2018-11-10 10:34:22,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:22,162 INFO L93 Difference]: Finished difference Result 346 states and 427 transitions. [2018-11-10 10:34:22,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 10:34:22,164 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2018-11-10 10:34:22,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:22,165 INFO L225 Difference]: With dead ends: 346 [2018-11-10 10:34:22,165 INFO L226 Difference]: Without dead ends: 318 [2018-11-10 10:34:22,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2018-11-10 10:34:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-11-10 10:34:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 293. [2018-11-10 10:34:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-11-10 10:34:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 356 transitions. [2018-11-10 10:34:22,181 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 356 transitions. Word has length 71 [2018-11-10 10:34:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:22,181 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 356 transitions. [2018-11-10 10:34:22,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 10:34:22,181 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 356 transitions. [2018-11-10 10:34:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-10 10:34:22,182 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:22,182 INFO L375 BasicCegarLoop]: trace histogram [3, 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 10:34:22,182 INFO L424 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:22,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:22,183 INFO L82 PathProgramCache]: Analyzing trace with hash -756319635, now seen corresponding path program 1 times [2018-11-10 10:34:22,183 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:22,183 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/cvc4nyu Starting monitored process 37 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 37 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 10:34:22,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:22,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 10:34:22,872 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:34:23,235 WARN L179 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2018-11-10 10:34:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 10:34:24,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:34:24,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2018-11-10 10:34:24,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-10 10:34:24,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-10 10:34:24,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2018-11-10 10:34:24,696 INFO L87 Difference]: Start difference. First operand 293 states and 356 transitions. Second operand 26 states. [2018-11-10 10:34:25,089 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2018-11-10 10:34:28,039 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2018-11-10 10:34:28,391 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2018-11-10 10:34:29,023 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2018-11-10 10:34:29,677 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2018-11-10 10:34:30,384 WARN L179 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2018-11-10 10:34:31,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:31,581 INFO L93 Difference]: Finished difference Result 388 states and 484 transitions. [2018-11-10 10:34:31,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-10 10:34:31,582 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2018-11-10 10:34:31,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:31,584 INFO L225 Difference]: With dead ends: 388 [2018-11-10 10:34:31,584 INFO L226 Difference]: Without dead ends: 360 [2018-11-10 10:34:31,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2018-11-10 10:34:31,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2018-11-10 10:34:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 302. [2018-11-10 10:34:31,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-11-10 10:34:31,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 369 transitions. [2018-11-10 10:34:31,602 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 369 transitions. Word has length 71 [2018-11-10 10:34:31,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:31,602 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 369 transitions. [2018-11-10 10:34:31,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-10 10:34:31,602 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 369 transitions. [2018-11-10 10:34:31,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-10 10:34:31,603 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:31,603 INFO L375 BasicCegarLoop]: trace histogram [3, 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, 1, 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 10:34:31,603 INFO L424 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:31,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:31,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1129966342, now seen corresponding path program 1 times [2018-11-10 10:34:31,603 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:31,604 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:34:31,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:31,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-10 10:34:31,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:34:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-10 10:34:31,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:34:31,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2018-11-10 10:34:31,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 10:34:31,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 10:34:31,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2018-11-10 10:34:31,806 INFO L87 Difference]: Start difference. First operand 302 states and 369 transitions. Second operand 14 states. [2018-11-10 10:34:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:32,138 INFO L93 Difference]: Finished difference Result 329 states and 401 transitions. [2018-11-10 10:34:32,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 10:34:32,139 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 72 [2018-11-10 10:34:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:32,140 INFO L225 Difference]: With dead ends: 329 [2018-11-10 10:34:32,140 INFO L226 Difference]: Without dead ends: 322 [2018-11-10 10:34:32,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2018-11-10 10:34:32,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-11-10 10:34:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 299. [2018-11-10 10:34:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-11-10 10:34:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 366 transitions. [2018-11-10 10:34:32,158 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 366 transitions. Word has length 72 [2018-11-10 10:34:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:32,158 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 366 transitions. [2018-11-10 10:34:32,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 10:34:32,158 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 366 transitions. [2018-11-10 10:34:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-10 10:34:32,159 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:32,159 INFO L375 BasicCegarLoop]: trace histogram [3, 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, 1] [2018-11-10 10:34:32,159 INFO L424 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:32,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:32,159 INFO L82 PathProgramCache]: Analyzing trace with hash -957279926, now seen corresponding path program 1 times [2018-11-10 10:34:32,160 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:32,160 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:34:32,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:32,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-10 10:34:32,235 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:34:32,236 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:34:32,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 10:34:32,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 10:34:32,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 10:34:32,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:34:32,237 INFO L87 Difference]: Start difference. First operand 299 states and 366 transitions. Second operand 6 states. [2018-11-10 10:34:32,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:32,457 INFO L93 Difference]: Finished difference Result 404 states and 502 transitions. [2018-11-10 10:34:32,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 10:34:32,458 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2018-11-10 10:34:32,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:32,459 INFO L225 Difference]: With dead ends: 404 [2018-11-10 10:34:32,459 INFO L226 Difference]: Without dead ends: 385 [2018-11-10 10:34:32,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 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 10:34:32,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2018-11-10 10:34:32,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 295. [2018-11-10 10:34:32,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-11-10 10:34:32,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 363 transitions. [2018-11-10 10:34:32,495 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 363 transitions. Word has length 72 [2018-11-10 10:34:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:32,495 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 363 transitions. [2018-11-10 10:34:32,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 10:34:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 363 transitions. [2018-11-10 10:34:32,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-10 10:34:32,496 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:32,496 INFO L375 BasicCegarLoop]: trace histogram [3, 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, 1] [2018-11-10 10:34:32,496 INFO L424 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:32,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:32,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1539597315, now seen corresponding path program 1 times [2018-11-10 10:34:32,497 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:32,497 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:34:32,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:32,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-10 10:34:32,777 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:34:32,778 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:34:32,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-11-10 10:34:32,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 10:34:32,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 10:34:32,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-10 10:34:32,779 INFO L87 Difference]: Start difference. First operand 295 states and 363 transitions. Second operand 9 states. [2018-11-10 10:34:33,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:33,158 INFO L93 Difference]: Finished difference Result 348 states and 427 transitions. [2018-11-10 10:34:33,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 10:34:33,159 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2018-11-10 10:34:33,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:33,160 INFO L225 Difference]: With dead ends: 348 [2018-11-10 10:34:33,160 INFO L226 Difference]: Without dead ends: 307 [2018-11-10 10:34:33,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-11-10 10:34:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-11-10 10:34:33,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 271. [2018-11-10 10:34:33,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-11-10 10:34:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 324 transitions. [2018-11-10 10:34:33,178 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 324 transitions. Word has length 72 [2018-11-10 10:34:33,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:33,178 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 324 transitions. [2018-11-10 10:34:33,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 10:34:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 324 transitions. [2018-11-10 10:34:33,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-11-10 10:34:33,179 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:33,179 INFO L375 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 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 10:34:33,180 INFO L424 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:33,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:33,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1650486698, now seen corresponding path program 1 times [2018-11-10 10:34:33,180 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:33,180 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:34:33,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:33,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-10 10:34:33,483 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:34:33,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:34:33,861 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 10:34:33,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:33,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-10 10:34:33,986 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:34:34,001 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 10:34:34,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2018-11-10 10:34:34,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 10:34:34,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 10:34:34,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2018-11-10 10:34:34,002 INFO L87 Difference]: Start difference. First operand 271 states and 324 transitions. Second operand 17 states. [2018-11-10 10:34:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:34,944 INFO L93 Difference]: Finished difference Result 332 states and 392 transitions. [2018-11-10 10:34:34,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 10:34:34,945 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2018-11-10 10:34:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:34,946 INFO L225 Difference]: With dead ends: 332 [2018-11-10 10:34:34,946 INFO L226 Difference]: Without dead ends: 237 [2018-11-10 10:34:34,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2018-11-10 10:34:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-11-10 10:34:34,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 198. [2018-11-10 10:34:34,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-11-10 10:34:34,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 241 transitions. [2018-11-10 10:34:34,971 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 241 transitions. Word has length 74 [2018-11-10 10:34:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:34,971 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 241 transitions. [2018-11-10 10:34:34,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 10:34:34,971 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 241 transitions. [2018-11-10 10:34:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-11-10 10:34:34,972 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:34,972 INFO L375 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 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 10:34:34,972 INFO L424 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:34,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:34,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1593228396, now seen corresponding path program 1 times [2018-11-10 10:34:34,972 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:34,973 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:34:34,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:35,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-10 10:34:35,081 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:34:35,082 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:34:35,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 10:34:35,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 10:34:35,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 10:34:35,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 10:34:35,083 INFO L87 Difference]: Start difference. First operand 198 states and 241 transitions. Second operand 6 states. [2018-11-10 10:34:35,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:35,124 INFO L93 Difference]: Finished difference Result 215 states and 258 transitions. [2018-11-10 10:34:35,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 10:34:35,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2018-11-10 10:34:35,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:35,125 INFO L225 Difference]: With dead ends: 215 [2018-11-10 10:34:35,125 INFO L226 Difference]: Without dead ends: 171 [2018-11-10 10:34:35,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 69 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 10:34:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-11-10 10:34:35,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 146. [2018-11-10 10:34:35,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-11-10 10:34:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 182 transitions. [2018-11-10 10:34:35,136 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 182 transitions. Word has length 74 [2018-11-10 10:34:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:35,136 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 182 transitions. [2018-11-10 10:34:35,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 10:34:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 182 transitions. [2018-11-10 10:34:35,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 10:34:35,137 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:35,137 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:34:35,137 INFO L424 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:35,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:35,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1841523407, now seen corresponding path program 1 times [2018-11-10 10:34:35,137 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:35,137 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:34:35,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:35,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:35,204 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 10:34:35,204 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:34:35,207 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:34:35,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 10:34:35,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 10:34:35,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 10:34:35,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 10:34:35,207 INFO L87 Difference]: Start difference. First operand 146 states and 182 transitions. Second operand 4 states. [2018-11-10 10:34:35,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:35,241 INFO L93 Difference]: Finished difference Result 170 states and 208 transitions. [2018-11-10 10:34:35,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 10:34:35,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2018-11-10 10:34:35,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:35,242 INFO L225 Difference]: With dead ends: 170 [2018-11-10 10:34:35,242 INFO L226 Difference]: Without dead ends: 146 [2018-11-10 10:34:35,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:34:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-11-10 10:34:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-11-10 10:34:35,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-11-10 10:34:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 174 transitions. [2018-11-10 10:34:35,253 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 174 transitions. Word has length 73 [2018-11-10 10:34:35,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:35,253 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 174 transitions. [2018-11-10 10:34:35,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 10:34:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 174 transitions. [2018-11-10 10:34:35,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-11-10 10:34:35,253 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:35,254 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, 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 10:34:35,254 INFO L424 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:35,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:35,254 INFO L82 PathProgramCache]: Analyzing trace with hash -258643985, now seen corresponding path program 1 times [2018-11-10 10:34:35,254 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:35,254 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:34:35,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:35,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:35,320 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 10:34:35,321 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:34:35,322 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:34:35,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 10:34:35,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 10:34:35,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 10:34:35,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:34:35,323 INFO L87 Difference]: Start difference. First operand 146 states and 174 transitions. Second operand 5 states. [2018-11-10 10:34:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:35,354 INFO L93 Difference]: Finished difference Result 174 states and 202 transitions. [2018-11-10 10:34:35,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 10:34:35,359 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2018-11-10 10:34:35,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:35,360 INFO L225 Difference]: With dead ends: 174 [2018-11-10 10:34:35,360 INFO L226 Difference]: Without dead ends: 124 [2018-11-10 10:34:35,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-10 10:34:35,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-11-10 10:34:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2018-11-10 10:34:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-11-10 10:34:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2018-11-10 10:34:35,373 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 75 [2018-11-10 10:34:35,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:35,374 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2018-11-10 10:34:35,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 10:34:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2018-11-10 10:34:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-11-10 10:34:35,374 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:35,374 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, 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 10:34:35,375 INFO L424 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:35,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:35,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1102649487, now seen corresponding path program 1 times [2018-11-10 10:34:35,375 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:35,375 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:34:35,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:35,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 10:34:35,471 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 10:34:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 10:34:35,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:34:35,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-10 10:34:35,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 10:34:35,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 10:34:35,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-10 10:34:35,557 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand 10 states. [2018-11-10 10:34:35,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:35,641 INFO L93 Difference]: Finished difference Result 128 states and 144 transitions. [2018-11-10 10:34:35,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 10:34:35,642 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2018-11-10 10:34:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:35,642 INFO L225 Difference]: With dead ends: 128 [2018-11-10 10:34:35,642 INFO L226 Difference]: Without dead ends: 84 [2018-11-10 10:34:35,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-11-10 10:34:35,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-10 10:34:35,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-11-10 10:34:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-10 10:34:35,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2018-11-10 10:34:35,648 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 75 [2018-11-10 10:34:35,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:35,648 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2018-11-10 10:34:35,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 10:34:35,648 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2018-11-10 10:34:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-10 10:34:35,649 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:35,649 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 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 10:34:35,649 INFO L424 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:35,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:35,649 INFO L82 PathProgramCache]: Analyzing trace with hash 950560560, now seen corresponding path program 1 times [2018-11-10 10:34:35,649 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:35,649 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/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 10:34:35,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:35,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-10 10:34:37,881 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:34:37,882 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:34:37,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-10 10:34:37,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 10:34:37,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 10:34:37,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-11-10 10:34:37,883 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 12 states. [2018-11-10 10:34:38,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:38,645 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2018-11-10 10:34:38,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 10:34:38,645 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2018-11-10 10:34:38,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:38,646 INFO L225 Difference]: With dead ends: 92 [2018-11-10 10:34:38,646 INFO L226 Difference]: Without dead ends: 74 [2018-11-10 10:34:38,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-11-10 10:34:38,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-11-10 10:34:38,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-11-10 10:34:38,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-10 10:34:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2018-11-10 10:34:38,650 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 79 [2018-11-10 10:34:38,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:38,651 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2018-11-10 10:34:38,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 10:34:38,651 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2018-11-10 10:34:38,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-10 10:34:38,651 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:34:38,651 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 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 10:34:38,651 INFO L424 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:34:38,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:34:38,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1440552440, now seen corresponding path program 1 times [2018-11-10 10:34:38,652 INFO L225 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-10 10:34:38,652 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8eeed7c2-3f60-4265-83c6-38ca772846d4/bin-2019/uautomizer/cvc4nyu Starting monitored process 48 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 48 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-10 10:34:38,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:34:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:34:38,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:34:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-10 10:34:38,837 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 10:34:38,839 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:34:38,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-11-10 10:34:38,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 10:34:38,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 10:34:38,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-10 10:34:38,839 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 10 states. [2018-11-10 10:34:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:34:39,062 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2018-11-10 10:34:39,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 10:34:39,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 80 [2018-11-10 10:34:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:34:39,063 INFO L225 Difference]: With dead ends: 74 [2018-11-10 10:34:39,063 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 10:34:39,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-11-10 10:34:39,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 10:34:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 10:34:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 10:34:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 10:34:39,064 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2018-11-10 10:34:39,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:34:39,064 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 10:34:39,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 10:34:39,064 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 10:34:39,064 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 10:34:39,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 10:34:39,227 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 168 [2018-11-10 10:34:39,304 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 10:34:39,486 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 10:34:39,529 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 164 [2018-11-10 10:34:39,618 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 10:34:39,663 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 34 [2018-11-10 10:34:39,672 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 10:34:39,676 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 10:34:39,713 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 10:34:39,777 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 10:34:39,837 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 10:34:39,885 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 10:34:39,906 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 10:34:39,914 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 10:34:39,923 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-10 10:34:41,465 WARN L179 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 163 DAG size of output: 96 [2018-11-10 10:35:02,046 WARN L179 SmtUtils]: Spent 20.58 s on a formula simplification. DAG size of input: 162 DAG size of output: 55 [2018-11-10 10:35:03,302 WARN L179 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 160 DAG size of output: 52 [2018-11-10 10:35:03,731 WARN L179 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2018-11-10 10:35:42,598 WARN L179 SmtUtils]: Spent 38.86 s on a formula simplification. DAG size of input: 397 DAG size of output: 230 [2018-11-10 10:36:13,602 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 10:36:13,605 INFO L168 Benchmark]: Toolchain (without parser) took 190401.48 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 272.6 MB). Free memory was 950.8 MB in the beginning and 883.5 MB in the end (delta: 67.3 MB). Peak memory consumption was 466.8 MB. Max. memory is 11.5 GB. [2018-11-10 10:36:13,605 INFO L168 Benchmark]: CDTParser took 0.15 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 10:36:13,605 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.69 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 934.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-10 10:36:13,606 INFO L168 Benchmark]: Boogie Preprocessor took 36.56 ms. Allocated memory is still 1.0 GB. Free memory was 934.7 MB in the beginning and 929.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-10 10:36:13,606 INFO L168 Benchmark]: RCFGBuilder took 426.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 929.3 MB in the beginning and 1.1 GB in the end (delta: -161.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2018-11-10 10:36:13,606 INFO L168 Benchmark]: TraceAbstraction took 189694.60 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 145.2 MB). Free memory was 1.1 GB in the beginning and 883.5 MB in the end (delta: 207.1 MB). Peak memory consumption was 479.1 MB. Max. memory is 11.5 GB. [2018-11-10 10:36:13,608 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 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 240.69 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 934.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 36.56 ms. Allocated memory is still 1.0 GB. Free memory was 934.7 MB in the beginning and 929.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 426.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 929.3 MB in the beginning and 1.1 GB in the end (delta: -161.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 189694.60 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 145.2 MB). Free memory was 1.1 GB in the beginning and 883.5 MB in the end (delta: 207.1 MB). Peak memory consumption was 479.1 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...