./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_2_true-unreach-call_true-no-overflow.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2_true-unreach-call_true-no-overflow.i -s /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/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 0b1dd98d7879c6a852477263dd33a13d229a6eb3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2_true-unreach-call_true-no-overflow.i -s /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/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 0b1dd98d7879c6a852477263dd33a13d229a6eb3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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. stderr output: (error "out of memory") --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 12:03:13,473 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 12:03:13,474 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 12:03:13,480 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 12:03:13,480 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 12:03:13,480 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 12:03:13,481 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 12:03:13,482 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 12:03:13,482 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 12:03:13,483 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 12:03:13,483 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 12:03:13,483 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 12:03:13,484 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 12:03:13,484 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 12:03:13,485 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 12:03:13,485 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 12:03:13,486 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 12:03:13,487 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 12:03:13,487 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 12:03:13,488 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 12:03:13,489 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 12:03:13,489 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 12:03:13,490 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 12:03:13,490 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 12:03:13,490 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 12:03:13,491 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 12:03:13,491 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 12:03:13,492 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 12:03:13,492 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 12:03:13,493 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 12:03:13,493 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 12:03:13,493 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 12:03:13,493 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 12:03:13,493 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 12:03:13,494 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 12:03:13,494 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 12:03:13,494 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-09 12:03:13,501 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 12:03:13,502 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 12:03:13,502 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 12:03:13,502 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 12:03:13,503 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 12:03:13,503 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 12:03:13,503 INFO L133 SettingsManager]: * Use SBE=true [2018-12-09 12:03:13,503 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 12:03:13,503 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 12:03:13,503 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 12:03:13,503 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 12:03:13,503 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 12:03:13,503 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 12:03:13,503 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 12:03:13,504 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 12:03:13,504 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 12:03:13,504 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 12:03:13,504 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 12:03:13,504 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 12:03:13,504 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 12:03:13,504 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 12:03:13,504 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 12:03:13,504 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 12:03:13,504 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 12:03:13,505 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 12:03:13,505 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 12:03:13,505 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 12:03:13,505 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-09 12:03:13,505 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 12:03:13,505 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 12:03:13,505 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_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/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 -> 0b1dd98d7879c6a852477263dd33a13d229a6eb3 [2018-12-09 12:03:13,522 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 12:03:13,529 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 12:03:13,531 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 12:03:13,532 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 12:03:13,532 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 12:03:13,533 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/../../sv-benchmarks/c/bitvector/num_conversion_2_true-unreach-call_true-no-overflow.i [2018-12-09 12:03:13,566 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/data/b5b927125/9be1f5c40b004691b515825277febe52/FLAGccc2d8ee7 [2018-12-09 12:03:13,947 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 12:03:13,947 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/sv-benchmarks/c/bitvector/num_conversion_2_true-unreach-call_true-no-overflow.i [2018-12-09 12:03:13,952 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/data/b5b927125/9be1f5c40b004691b515825277febe52/FLAGccc2d8ee7 [2018-12-09 12:03:14,309 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/data/b5b927125/9be1f5c40b004691b515825277febe52 [2018-12-09 12:03:14,311 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 12:03:14,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 12:03:14,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 12:03:14,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 12:03:14,315 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 12:03:14,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:03:14" (1/1) ... [2018-12-09 12:03:14,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@296aed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:14, skipping insertion in model container [2018-12-09 12:03:14,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:03:14" (1/1) ... [2018-12-09 12:03:14,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 12:03:14,333 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 12:03:14,419 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 12:03:14,421 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 12:03:14,430 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 12:03:14,439 INFO L195 MainTranslator]: Completed translation [2018-12-09 12:03:14,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:14 WrapperNode [2018-12-09 12:03:14,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 12:03:14,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 12:03:14,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 12:03:14,440 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 12:03:14,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:14" (1/1) ... [2018-12-09 12:03:14,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:14" (1/1) ... [2018-12-09 12:03:14,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 12:03:14,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 12:03:14,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 12:03:14,452 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 12:03:14,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:14" (1/1) ... [2018-12-09 12:03:14,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:14" (1/1) ... [2018-12-09 12:03:14,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:14" (1/1) ... [2018-12-09 12:03:14,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:14" (1/1) ... [2018-12-09 12:03:14,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:14" (1/1) ... [2018-12-09 12:03:14,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:14" (1/1) ... [2018-12-09 12:03:14,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:14" (1/1) ... [2018-12-09 12:03:14,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 12:03:14,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 12:03:14,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 12:03:14,465 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 12:03:14,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 12:03:14,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 12:03:14,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 12:03:14,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 12:03:14,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 12:03:14,527 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 12:03:14,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 12:03:14,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-09 12:03:14,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-09 12:03:14,612 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 12:03:14,612 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-09 12:03:14,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:03:14 BoogieIcfgContainer [2018-12-09 12:03:14,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 12:03:14,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 12:03:14,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 12:03:14,614 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 12:03:14,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:03:14" (1/3) ... [2018-12-09 12:03:14,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7731d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:03:14, skipping insertion in model container [2018-12-09 12:03:14,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:14" (2/3) ... [2018-12-09 12:03:14,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7731d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:03:14, skipping insertion in model container [2018-12-09 12:03:14,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:03:14" (3/3) ... [2018-12-09 12:03:14,616 INFO L112 eAbstractionObserver]: Analyzing ICFG num_conversion_2_true-unreach-call_true-no-overflow.i [2018-12-09 12:03:14,622 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 12:03:14,626 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 12:03:14,635 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 12:03:14,655 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 12:03:14,656 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 12:03:14,656 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 12:03:14,656 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 12:03:14,656 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 12:03:14,656 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 12:03:14,656 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 12:03:14,656 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 12:03:14,656 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 12:03:14,666 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-09 12:03:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 12:03:14,669 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:03:14,670 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:03:14,671 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:03:14,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:03:14,675 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2018-12-09 12:03:14,676 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:03:14,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:03:14,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:14,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:03:14,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:03:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:14,736 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 12:03:14,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 12:03:14,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 12:03:14,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 12:03:14,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 12:03:14,748 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-12-09 12:03:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:03:14,759 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-12-09 12:03:14,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 12:03:14,760 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-09 12:03:14,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:03:14,765 INFO L225 Difference]: With dead ends: 32 [2018-12-09 12:03:14,765 INFO L226 Difference]: Without dead ends: 13 [2018-12-09 12:03:14,767 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 12:03:14,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-09 12:03:14,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-09 12:03:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-09 12:03:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-12-09 12:03:14,786 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-12-09 12:03:14,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:03:14,786 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-12-09 12:03:14,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 12:03:14,786 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-12-09 12:03:14,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 12:03:14,787 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:03:14,787 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:03:14,787 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:03:14,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:03:14,788 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2018-12-09 12:03:14,788 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:03:14,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:03:14,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:14,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:03:14,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:03:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:14,839 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 12:03:14,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 12:03:14,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 12:03:14,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 12:03:14,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 12:03:14,841 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2018-12-09 12:03:14,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:03:14,850 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-12-09 12:03:14,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 12:03:14,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-09 12:03:14,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:03:14,851 INFO L225 Difference]: With dead ends: 21 [2018-12-09 12:03:14,851 INFO L226 Difference]: Without dead ends: 16 [2018-12-09 12:03:14,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 12:03:14,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-09 12:03:14,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2018-12-09 12:03:14,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-09 12:03:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-09 12:03:14,854 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-12-09 12:03:14,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:03:14,855 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-09 12:03:14,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 12:03:14,855 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-09 12:03:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 12:03:14,855 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:03:14,855 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:03:14,855 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:03:14,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:03:14,856 INFO L82 PathProgramCache]: Analyzing trace with hash 743821333, now seen corresponding path program 1 times [2018-12-09 12:03:14,856 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:03:14,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:03:14,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:14,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:03:14,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:03:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:14,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:03:14,893 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/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 [2018-12-09 12:03:14,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:03:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:03:14,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:03:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:14,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:03:14,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-12-09 12:03:14,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 12:03:14,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 12:03:14,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 12:03:14,952 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-12-09 12:03:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:03:14,972 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2018-12-09 12:03:14,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 12:03:14,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-09 12:03:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:03:14,973 INFO L225 Difference]: With dead ends: 24 [2018-12-09 12:03:14,973 INFO L226 Difference]: Without dead ends: 19 [2018-12-09 12:03:14,973 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 12:03:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-09 12:03:14,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-12-09 12:03:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-09 12:03:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-12-09 12:03:14,976 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-12-09 12:03:14,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:03:14,976 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-12-09 12:03:14,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 12:03:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-12-09 12:03:14,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-09 12:03:14,976 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:03:14,976 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:03:14,976 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:03:14,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:03:14,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1182180650, now seen corresponding path program 2 times [2018-12-09 12:03:14,977 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:03:14,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:03:14,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:14,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:03:14,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:03:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:15,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:03:15,022 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/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 [2018-12-09 12:03:15,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-09 12:03:15,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 12:03:15,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:03:15,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:03:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:15,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:03:15,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-12-09 12:03:15,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 12:03:15,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 12:03:15,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-12-09 12:03:15,094 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2018-12-09 12:03:15,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:03:15,124 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-12-09 12:03:15,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 12:03:15,125 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-12-09 12:03:15,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:03:15,125 INFO L225 Difference]: With dead ends: 27 [2018-12-09 12:03:15,125 INFO L226 Difference]: Without dead ends: 22 [2018-12-09 12:03:15,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-12-09 12:03:15,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-09 12:03:15,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-12-09 12:03:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-09 12:03:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2018-12-09 12:03:15,128 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2018-12-09 12:03:15,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:03:15,128 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2018-12-09 12:03:15,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 12:03:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2018-12-09 12:03:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-09 12:03:15,129 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:03:15,129 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:03:15,129 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:03:15,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:03:15,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2055818357, now seen corresponding path program 3 times [2018-12-09 12:03:15,129 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:03:15,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:03:15,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:15,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:03:15,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:03:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:15,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:03:15,179 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/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 [2018-12-09 12:03:15,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 12:03:15,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-09 12:03:15,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:03:15,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:03:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:15,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:03:15,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-12-09 12:03:15,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 12:03:15,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 12:03:15,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-12-09 12:03:15,258 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 9 states. [2018-12-09 12:03:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:03:15,288 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2018-12-09 12:03:15,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 12:03:15,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-12-09 12:03:15,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:03:15,288 INFO L225 Difference]: With dead ends: 30 [2018-12-09 12:03:15,288 INFO L226 Difference]: Without dead ends: 25 [2018-12-09 12:03:15,289 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-12-09 12:03:15,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-09 12:03:15,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-12-09 12:03:15,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-09 12:03:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-12-09 12:03:15,291 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2018-12-09 12:03:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:03:15,292 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-12-09 12:03:15,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 12:03:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-12-09 12:03:15,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 12:03:15,292 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:03:15,292 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:03:15,292 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:03:15,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:03:15,292 INFO L82 PathProgramCache]: Analyzing trace with hash 318767734, now seen corresponding path program 4 times [2018-12-09 12:03:15,292 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:03:15,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:03:15,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:15,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:03:15,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:03:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:15,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:03:15,354 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 12:03:15,360 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 12:03:15,367 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 12:03:15,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:03:15,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:03:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:15,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:03:15,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2018-12-09 12:03:15,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 12:03:15,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 12:03:15,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-12-09 12:03:15,451 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 11 states. [2018-12-09 12:03:15,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:03:15,513 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2018-12-09 12:03:15,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 12:03:15,514 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2018-12-09 12:03:15,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:03:15,514 INFO L225 Difference]: With dead ends: 33 [2018-12-09 12:03:15,514 INFO L226 Difference]: Without dead ends: 28 [2018-12-09 12:03:15,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-12-09 12:03:15,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-09 12:03:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2018-12-09 12:03:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-09 12:03:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2018-12-09 12:03:15,518 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 22 [2018-12-09 12:03:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:03:15,518 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2018-12-09 12:03:15,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 12:03:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2018-12-09 12:03:15,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-09 12:03:15,518 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:03:15,518 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:03:15,519 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:03:15,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:03:15,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1904607445, now seen corresponding path program 5 times [2018-12-09 12:03:15,519 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:03:15,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:03:15,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:15,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:03:15,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:03:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:15,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:03:15,576 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 12:03:15,581 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-09 12:03:15,594 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-09 12:03:15,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:03:15,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:03:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:15,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:03:15,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-12-09 12:03:15,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 12:03:15,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 12:03:15,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-12-09 12:03:15,745 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 13 states. [2018-12-09 12:03:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:03:15,849 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-12-09 12:03:15,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 12:03:15,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-12-09 12:03:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:03:15,850 INFO L225 Difference]: With dead ends: 36 [2018-12-09 12:03:15,850 INFO L226 Difference]: Without dead ends: 31 [2018-12-09 12:03:15,851 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-12-09 12:03:15,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-09 12:03:15,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2018-12-09 12:03:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-09 12:03:15,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2018-12-09 12:03:15,856 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 25 [2018-12-09 12:03:15,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:03:15,856 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2018-12-09 12:03:15,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 12:03:15,856 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2018-12-09 12:03:15,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-09 12:03:15,857 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:03:15,857 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:03:15,857 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:03:15,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:03:15,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1015181846, now seen corresponding path program 6 times [2018-12-09 12:03:15,858 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:03:15,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:03:15,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:15,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:03:15,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:03:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:15,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:03:15,940 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 12:03:15,946 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-09 12:03:15,965 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-09 12:03:15,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:03:15,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:03:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:16,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:03:16,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2018-12-09 12:03:16,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-09 12:03:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-09 12:03:16,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-12-09 12:03:16,083 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 15 states. [2018-12-09 12:03:16,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:03:16,169 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2018-12-09 12:03:16,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 12:03:16,169 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-12-09 12:03:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:03:16,170 INFO L225 Difference]: With dead ends: 39 [2018-12-09 12:03:16,170 INFO L226 Difference]: Without dead ends: 34 [2018-12-09 12:03:16,170 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-12-09 12:03:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-09 12:03:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-12-09 12:03:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-09 12:03:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-12-09 12:03:16,175 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 28 [2018-12-09 12:03:16,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:03:16,175 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-12-09 12:03:16,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-09 12:03:16,176 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-12-09 12:03:16,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-09 12:03:16,176 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:03:16,176 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:03:16,177 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:03:16,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:03:16,177 INFO L82 PathProgramCache]: Analyzing trace with hash -209588939, now seen corresponding path program 7 times [2018-12-09 12:03:16,177 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:03:16,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:03:16,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:16,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:03:16,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:03:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:16,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:03:16,263 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 12:03:16,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:03:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:03:16,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:03:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:16,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:03:16,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-12-09 12:03:16,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 12:03:16,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 12:03:16,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2018-12-09 12:03:16,453 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 17 states. [2018-12-09 12:03:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:03:16,570 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2018-12-09 12:03:16,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 12:03:16,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2018-12-09 12:03:16,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:03:16,570 INFO L225 Difference]: With dead ends: 42 [2018-12-09 12:03:16,570 INFO L226 Difference]: Without dead ends: 37 [2018-12-09 12:03:16,571 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2018-12-09 12:03:16,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-09 12:03:16,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2018-12-09 12:03:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-09 12:03:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2018-12-09 12:03:16,574 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 31 [2018-12-09 12:03:16,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:03:16,574 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2018-12-09 12:03:16,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 12:03:16,574 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2018-12-09 12:03:16,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-09 12:03:16,575 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:03:16,575 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:03:16,575 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:03:16,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:03:16,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1608865354, now seen corresponding path program 8 times [2018-12-09 12:03:16,575 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:03:16,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:03:16,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:16,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:03:16,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:03:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 12:03:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 12:03:16,599 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 12:03:16,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:03:16 BoogieIcfgContainer [2018-12-09 12:03:16,616 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 12:03:16,616 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 12:03:16,616 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 12:03:16,616 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 12:03:16,616 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:03:14" (3/4) ... [2018-12-09 12:03:16,618 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 12:03:16,618 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 12:03:16,619 INFO L168 Benchmark]: Toolchain (without parser) took 2307.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 197.1 MB). Free memory was 953.3 MB in the beginning and 1.2 GB in the end (delta: -201.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:03:16,620 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:03:16,620 INFO L168 Benchmark]: CACSL2BoogieTranslator took 126.53 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-12-09 12:03:16,620 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.11 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:03:16,620 INFO L168 Benchmark]: Boogie Preprocessor took 12.81 ms. Allocated memory is still 1.0 GB. Free memory was 942.4 MB in the beginning and 939.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-09 12:03:16,621 INFO L168 Benchmark]: RCFGBuilder took 147.23 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -151.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 11.5 GB. [2018-12-09 12:03:16,621 INFO L168 Benchmark]: TraceAbstraction took 2003.24 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 82.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -62.9 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. [2018-12-09 12:03:16,621 INFO L168 Benchmark]: Witness Printer took 2.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:03:16,623 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 126.53 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.11 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.81 ms. Allocated memory is still 1.0 GB. Free memory was 942.4 MB in the beginning and 939.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 147.23 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -151.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2003.24 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 82.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -62.9 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. * Witness Printer took 2.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 6]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 21, overapproximation of bitwiseAnd at line 22. Possible FailurePath: [L14] unsigned char x = __VERIFIER_nondet_uchar(); [L15] unsigned char y; [L16] unsigned char c; [L18] y = 0 [L19] c = 0 VAL [c=0, x=1, y=0] [L20] COND TRUE c < (unsigned char)8 [L21] unsigned char i = ((unsigned char)1) << c; [L22] unsigned char bit = x & i; VAL [c=0, x=1, y=0] [L23] COND TRUE bit != (unsigned char)0 [L24] y = y + i VAL [bit=1, c=0, i=0, x=1, y=0] [L26] c = c + ((unsigned char)1) VAL [bit=1, c=1, i=0, x=1, y=0] [L20] COND TRUE c < (unsigned char)8 [L21] unsigned char i = ((unsigned char)1) << c; [L22] unsigned char bit = x & i; VAL [c=1, x=1, y=0] [L23] COND TRUE bit != (unsigned char)0 [L24] y = y + i VAL [bit=1, c=1, i=0, x=1, y=0] [L26] c = c + ((unsigned char)1) VAL [bit=1, c=2, i=0, x=1, y=0] [L20] COND TRUE c < (unsigned char)8 [L21] unsigned char i = ((unsigned char)1) << c; [L22] unsigned char bit = x & i; VAL [c=2, x=1, y=0] [L23] COND TRUE bit != (unsigned char)0 [L24] y = y + i VAL [bit=1, c=2, i=0, x=1, y=0] [L26] c = c + ((unsigned char)1) VAL [bit=1, c=3, i=0, x=1, y=0] [L20] COND TRUE c < (unsigned char)8 [L21] unsigned char i = ((unsigned char)1) << c; [L22] unsigned char bit = x & i; VAL [c=3, x=1, y=0] [L23] COND TRUE bit != (unsigned char)0 [L24] y = y + i VAL [bit=1, c=3, i=0, x=1, y=0] [L26] c = c + ((unsigned char)1) VAL [bit=1, c=4, i=0, x=1, y=0] [L20] COND TRUE c < (unsigned char)8 [L21] unsigned char i = ((unsigned char)1) << c; [L22] unsigned char bit = x & i; VAL [c=4, x=1, y=0] [L23] COND TRUE bit != (unsigned char)0 [L24] y = y + i VAL [bit=1, c=4, i=0, x=1, y=0] [L26] c = c + ((unsigned char)1) VAL [bit=1, c=5, i=0, x=1, y=0] [L20] COND TRUE c < (unsigned char)8 [L21] unsigned char i = ((unsigned char)1) << c; [L22] unsigned char bit = x & i; VAL [c=5, x=1, y=0] [L23] COND TRUE bit != (unsigned char)0 [L24] y = y + i VAL [bit=1, c=5, i=0, x=1, y=0] [L26] c = c + ((unsigned char)1) VAL [bit=1, c=6, i=0, x=1, y=0] [L20] COND TRUE c < (unsigned char)8 [L21] unsigned char i = ((unsigned char)1) << c; [L22] unsigned char bit = x & i; VAL [c=6, x=1, y=0] [L23] COND TRUE bit != (unsigned char)0 [L24] y = y + i VAL [bit=1, c=6, i=0, x=1, y=0] [L26] c = c + ((unsigned char)1) VAL [bit=1, c=7, i=0, x=1, y=0] [L20] COND TRUE c < (unsigned char)8 [L21] unsigned char i = ((unsigned char)1) << c; [L22] unsigned char bit = x & i; VAL [c=7, x=1, y=0] [L23] COND TRUE bit != (unsigned char)0 [L24] y = y + i VAL [bit=1, c=7, i=0, x=1, y=0] [L26] c = c + ((unsigned char)1) VAL [bit=1, c=8, i=0, x=1, y=0] [L20] COND FALSE !(c < (unsigned char)8) VAL [bit=1, c=8, i=0, x=1, y=0] [L28] CALL __VERIFIER_assert(x == y) VAL [\old(cond)=0] [L5] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L6] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 1.9s OverallTime, 10 OverallIterations, 8 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 173 SDtfs, 130 SDslu, 914 SDs, 0 SdLazy, 667 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 201 GetRequests, 123 SyntacticMatches, 14 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 16 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 362 NumberOfCodeBlocks, 362 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 312 ConstructedInterpolants, 70 QuantifiedInterpolants, 68271 SizeOfPredicates, 8 NumberOfNonLiveVariables, 350 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 0/392 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-09 12:03:17,890 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 12:03:17,891 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 12:03:17,897 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 12:03:17,897 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 12:03:17,897 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 12:03:17,898 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 12:03:17,899 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 12:03:17,900 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 12:03:17,900 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 12:03:17,900 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 12:03:17,900 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 12:03:17,901 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 12:03:17,901 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 12:03:17,902 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 12:03:17,902 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 12:03:17,903 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 12:03:17,903 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 12:03:17,904 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 12:03:17,905 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 12:03:17,905 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 12:03:17,906 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 12:03:17,907 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 12:03:17,907 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 12:03:17,907 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 12:03:17,908 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 12:03:17,908 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 12:03:17,909 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 12:03:17,909 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 12:03:17,909 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 12:03:17,910 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 12:03:17,910 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 12:03:17,910 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 12:03:17,910 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 12:03:17,911 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 12:03:17,911 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 12:03:17,911 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-12-09 12:03:17,918 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 12:03:17,918 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 12:03:17,919 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 12:03:17,919 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 12:03:17,919 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 12:03:17,919 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 12:03:17,919 INFO L133 SettingsManager]: * Use SBE=true [2018-12-09 12:03:17,920 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 12:03:17,920 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 12:03:17,920 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 12:03:17,920 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 12:03:17,920 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 12:03:17,920 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 12:03:17,920 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 12:03:17,920 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-09 12:03:17,920 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-09 12:03:17,920 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 12:03:17,920 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 12:03:17,921 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 12:03:17,921 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 12:03:17,921 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 12:03:17,921 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 12:03:17,921 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 12:03:17,921 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 12:03:17,921 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 12:03:17,921 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 12:03:17,921 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 12:03:17,921 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 12:03:17,921 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-12-09 12:03:17,922 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 12:03:17,922 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-09 12:03:17,922 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-09 12:03:17,922 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_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/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 -> 0b1dd98d7879c6a852477263dd33a13d229a6eb3 [2018-12-09 12:03:17,940 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 12:03:17,949 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 12:03:17,952 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 12:03:17,953 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 12:03:17,953 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 12:03:17,954 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/../../sv-benchmarks/c/bitvector/num_conversion_2_true-unreach-call_true-no-overflow.i [2018-12-09 12:03:17,998 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/data/db5f63d5a/6dbc4663a1b94b0a8ee3647ec8cc445c/FLAG11045a993 [2018-12-09 12:03:18,400 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 12:03:18,400 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/sv-benchmarks/c/bitvector/num_conversion_2_true-unreach-call_true-no-overflow.i [2018-12-09 12:03:18,404 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/data/db5f63d5a/6dbc4663a1b94b0a8ee3647ec8cc445c/FLAG11045a993 [2018-12-09 12:03:18,411 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/data/db5f63d5a/6dbc4663a1b94b0a8ee3647ec8cc445c [2018-12-09 12:03:18,413 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 12:03:18,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 12:03:18,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 12:03:18,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 12:03:18,417 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 12:03:18,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:03:18" (1/1) ... [2018-12-09 12:03:18,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bfa0d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:18, skipping insertion in model container [2018-12-09 12:03:18,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:03:18" (1/1) ... [2018-12-09 12:03:18,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 12:03:18,432 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 12:03:18,517 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 12:03:18,519 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 12:03:18,529 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 12:03:18,537 INFO L195 MainTranslator]: Completed translation [2018-12-09 12:03:18,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:18 WrapperNode [2018-12-09 12:03:18,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 12:03:18,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 12:03:18,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 12:03:18,538 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 12:03:18,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:18" (1/1) ... [2018-12-09 12:03:18,547 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:18" (1/1) ... [2018-12-09 12:03:18,551 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 12:03:18,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 12:03:18,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 12:03:18,551 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 12:03:18,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:18" (1/1) ... [2018-12-09 12:03:18,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:18" (1/1) ... [2018-12-09 12:03:18,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:18" (1/1) ... [2018-12-09 12:03:18,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:18" (1/1) ... [2018-12-09 12:03:18,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:18" (1/1) ... [2018-12-09 12:03:18,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:18" (1/1) ... [2018-12-09 12:03:18,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:18" (1/1) ... [2018-12-09 12:03:18,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 12:03:18,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 12:03:18,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 12:03:18,565 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 12:03:18,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 12:03:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 12:03:18,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 12:03:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 12:03:18,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 12:03:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 12:03:18,627 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 12:03:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-09 12:03:18,627 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-09 12:03:18,718 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 12:03:18,718 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-09 12:03:18,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:03:18 BoogieIcfgContainer [2018-12-09 12:03:18,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 12:03:18,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 12:03:18,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 12:03:18,720 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 12:03:18,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:03:18" (1/3) ... [2018-12-09 12:03:18,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d301fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:03:18, skipping insertion in model container [2018-12-09 12:03:18,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:03:18" (2/3) ... [2018-12-09 12:03:18,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d301fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:03:18, skipping insertion in model container [2018-12-09 12:03:18,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:03:18" (3/3) ... [2018-12-09 12:03:18,722 INFO L112 eAbstractionObserver]: Analyzing ICFG num_conversion_2_true-unreach-call_true-no-overflow.i [2018-12-09 12:03:18,728 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 12:03:18,732 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 12:03:18,741 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 12:03:18,758 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 12:03:18,758 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 12:03:18,758 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 12:03:18,758 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 12:03:18,759 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 12:03:18,759 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 12:03:18,759 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 12:03:18,759 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 12:03:18,759 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 12:03:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-09 12:03:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 12:03:18,771 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:03:18,772 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:03:18,773 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:03:18,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:03:18,776 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2018-12-09 12:03:18,778 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 12:03:18,779 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 12:03:18,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:03:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:03:18,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:03:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:18,823 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 12:03:18,825 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 12:03:18,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 12:03:18,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 12:03:18,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 12:03:18,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 12:03:18,837 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-12-09 12:03:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:03:18,849 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-12-09 12:03:18,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 12:03:18,850 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-09 12:03:18,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:03:18,854 INFO L225 Difference]: With dead ends: 32 [2018-12-09 12:03:18,854 INFO L226 Difference]: Without dead ends: 13 [2018-12-09 12:03:18,856 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 12:03:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-09 12:03:18,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-09 12:03:18,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-09 12:03:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-12-09 12:03:18,877 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-12-09 12:03:18,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:03:18,877 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-12-09 12:03:18,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 12:03:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-12-09 12:03:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 12:03:18,877 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:03:18,877 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:03:18,878 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:03:18,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:03:18,878 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2018-12-09 12:03:18,878 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 12:03:18,878 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 12:03:18,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:03:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:03:18,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:03:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:18,915 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 12:03:18,916 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 12:03:18,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 12:03:18,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 12:03:18,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 12:03:18,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 12:03:18,917 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2018-12-09 12:03:18,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:03:18,928 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-12-09 12:03:18,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 12:03:18,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-09 12:03:18,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:03:18,929 INFO L225 Difference]: With dead ends: 21 [2018-12-09 12:03:18,929 INFO L226 Difference]: Without dead ends: 16 [2018-12-09 12:03:18,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 12:03:18,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-09 12:03:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2018-12-09 12:03:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-09 12:03:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-09 12:03:18,932 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-12-09 12:03:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:03:18,932 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-09 12:03:18,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 12:03:18,932 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-09 12:03:18,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 12:03:18,933 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:03:18,933 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:03:18,933 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:03:18,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:03:18,933 INFO L82 PathProgramCache]: Analyzing trace with hash 743821333, now seen corresponding path program 1 times [2018-12-09 12:03:18,933 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 12:03:18,933 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 12:03:18,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:03:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:03:18,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:03:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:18,968 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:03:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:18,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:03:18,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-12-09 12:03:18,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 12:03:18,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 12:03:18,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-09 12:03:18,988 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 6 states. [2018-12-09 12:03:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:03:19,022 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2018-12-09 12:03:19,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 12:03:19,022 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-12-09 12:03:19,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:03:19,023 INFO L225 Difference]: With dead ends: 28 [2018-12-09 12:03:19,023 INFO L226 Difference]: Without dead ends: 23 [2018-12-09 12:03:19,024 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-09 12:03:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-09 12:03:19,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-09 12:03:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-09 12:03:19,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-12-09 12:03:19,028 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2018-12-09 12:03:19,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:03:19,028 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-12-09 12:03:19,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 12:03:19,029 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-12-09 12:03:19,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 12:03:19,029 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:03:19,029 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:03:19,029 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:03:19,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:03:19,030 INFO L82 PathProgramCache]: Analyzing trace with hash 318767734, now seen corresponding path program 2 times [2018-12-09 12:03:19,030 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 12:03:19,030 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 12:03:19,043 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-09 12:03:19,068 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 12:03:19,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:03:19,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:03:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:19,096 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:03:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:19,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:03:19,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-12-09 12:03:19,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 12:03:19,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 12:03:19,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2018-12-09 12:03:19,156 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 12 states. [2018-12-09 12:03:19,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:03:19,254 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2018-12-09 12:03:19,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 12:03:19,255 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-12-09 12:03:19,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:03:19,255 INFO L225 Difference]: With dead ends: 40 [2018-12-09 12:03:19,255 INFO L226 Difference]: Without dead ends: 35 [2018-12-09 12:03:19,256 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-09 12:03:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-09 12:03:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-12-09 12:03:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-09 12:03:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2018-12-09 12:03:19,262 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 22 [2018-12-09 12:03:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:03:19,262 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2018-12-09 12:03:19,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 12:03:19,262 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2018-12-09 12:03:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-09 12:03:19,263 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:03:19,263 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:03:19,263 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:03:19,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:03:19,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1608865354, now seen corresponding path program 3 times [2018-12-09 12:03:19,264 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 12:03:19,264 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 12:03:19,277 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-12-09 12:03:19,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-09 12:03:19,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:03:19,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:03:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:21,325 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:03:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:03:27,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:03:27,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2018-12-09 12:03:27,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-09 12:03:27,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-09 12:03:27,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2796, Unknown=0, NotChecked=0, Total=3080 [2018-12-09 12:03:27,076 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 56 states. [2018-12-09 12:03:27,538 WARN L180 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 102 [2018-12-09 12:03:29,673 WARN L180 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 268 DAG size of output: 239 [2018-12-09 12:03:31,668 WARN L180 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 230 DAG size of output: 220 [2018-12-09 12:03:32,042 WARN L180 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 107 [2018-12-09 12:03:33,699 WARN L180 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 209 DAG size of output: 193 [2018-12-09 12:03:35,548 WARN L180 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 230 DAG size of output: 217 [2018-12-09 12:03:36,082 WARN L180 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2018-12-09 12:03:36,559 WARN L180 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2018-12-09 12:03:37,623 WARN L180 SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2018-12-09 12:03:38,001 WARN L180 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2018-12-09 12:03:38,561 WARN L180 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 110 [2018-12-09 12:03:38,915 WARN L180 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 128 [2018-12-09 12:03:40,539 WARN L180 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 143 DAG size of output: 139 [2018-12-09 12:03:42,652 WARN L180 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 268 DAG size of output: 236 [2018-12-09 12:03:43,178 WARN L180 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2018-12-09 12:03:45,174 WARN L180 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 247 DAG size of output: 228 [2018-12-09 12:03:46,927 WARN L180 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 228 DAG size of output: 209 [2018-12-09 12:03:47,321 WARN L180 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2018-12-09 12:03:48,278 WARN L180 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 170 [2018-12-09 12:03:48,802 WARN L180 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-12-09 12:03:49,281 WARN L180 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2018-12-09 12:03:50,068 WARN L180 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 111 [2018-12-09 12:03:51,731 WARN L180 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 140 DAG size of output: 136 [2018-12-09 12:03:52,566 WARN L180 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-12-09 12:03:53,247 WARN L180 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-12-09 12:03:53,574 WARN L180 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2018-12-09 12:03:55,077 WARN L180 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 172 [2018-12-09 12:03:55,976 WARN L180 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 116 [2018-12-09 12:03:58,303 WARN L180 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 250 DAG size of output: 227 [2018-12-09 12:04:00,761 WARN L180 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 234 DAG size of output: 215 [2018-12-09 12:04:03,113 WARN L180 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 232 DAG size of output: 213 [2018-12-09 12:04:04,530 WARN L180 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 189 [2018-12-09 12:04:06,309 WARN L180 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 223 DAG size of output: 204 [2018-12-09 12:04:08,157 WARN L180 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 218 [2018-12-09 12:04:09,129 WARN L180 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-12-09 12:04:10,425 WARN L180 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 112 [2018-12-09 12:04:11,648 WARN L180 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 116 [2018-12-09 12:04:12,116 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-12-09 12:04:12,460 WARN L180 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2018-12-09 12:04:14,378 WARN L180 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 165 [2018-12-09 12:04:15,375 WARN L180 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 101 [2018-12-09 12:04:17,225 WARN L180 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 226 DAG size of output: 207 [2018-12-09 12:04:19,055 WARN L180 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 226 DAG size of output: 207 [2018-12-09 12:04:20,747 WARN L180 SmtUtils]: Spent 941.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 199 [2018-12-09 12:04:23,013 WARN L180 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 211 [2018-12-09 12:04:24,114 WARN L180 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 115 [2018-12-09 12:04:24,917 WARN L180 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 99 [2018-12-09 12:04:27,103 WARN L180 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 301 DAG size of output: 222 [2018-12-09 12:04:28,449 WARN L180 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 133 [2018-12-09 12:04:30,929 WARN L180 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 158 [2018-12-09 12:04:32,537 WARN L180 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 214 [2018-12-09 12:04:35,218 WARN L180 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 310 DAG size of output: 231 [2018-12-09 12:04:36,387 WARN L180 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 131 [2018-12-09 12:04:37,918 WARN L180 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 203 [2018-12-09 12:04:39,734 WARN L180 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 221 DAG size of output: 202 [2018-12-09 12:04:41,486 WARN L180 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 213 DAG size of output: 194 [2018-12-09 12:04:43,846 WARN L180 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 208 [2018-12-09 12:04:45,235 WARN L180 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 184 [2018-12-09 12:04:46,113 WARN L180 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 178 [2018-12-09 12:04:47,428 WARN L180 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 129 [2018-12-09 12:04:48,035 WARN L180 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 97 [2018-12-09 12:04:50,303 WARN L180 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 301 DAG size of output: 222 [2018-12-09 12:04:52,708 WARN L180 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 262 DAG size of output: 224 [2018-12-09 12:04:54,635 WARN L180 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 214 [2018-12-09 12:04:56,048 WARN L180 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 147 [2018-12-09 12:04:58,203 WARN L180 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 161 [2018-12-09 12:04:59,722 WARN L180 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 214 [2018-12-09 12:05:02,632 WARN L180 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 310 DAG size of output: 231 [2018-12-09 12:05:04,342 WARN L180 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 217 [2018-12-09 12:05:07,141 WARN L180 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 268 DAG size of output: 230 [2018-12-09 12:05:08,928 WARN L180 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 211 [2018-12-09 12:05:11,402 WARN L180 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 264 DAG size of output: 226 [2018-12-09 12:05:12,782 WARN L180 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 145 [2018-12-09 12:05:14,556 WARN L180 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 219 DAG size of output: 200 [2018-12-09 12:05:16,346 WARN L180 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 197 [2018-12-09 12:05:18,946 WARN L180 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 306 DAG size of output: 230 [2018-12-09 12:05:20,381 WARN L180 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 184 [2018-12-09 12:05:22,054 WARN L180 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 187 [2018-12-09 12:05:23,419 WARN L180 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 181 [2018-12-09 12:05:24,807 WARN L180 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 143 [2018-12-09 12:05:27,078 WARN L180 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 309 DAG size of output: 233 [2018-12-09 12:05:29,523 WARN L180 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 262 DAG size of output: 224 [2018-12-09 12:05:32,533 WARN L180 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 267 DAG size of output: 229 [2018-12-09 12:05:35,030 WARN L180 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 257 DAG size of output: 219 [2018-12-09 12:05:36,701 WARN L180 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 173 [2018-12-09 12:05:38,497 WARN L180 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 304 DAG size of output: 228 [2018-12-09 12:05:41,256 WARN L180 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 318 DAG size of output: 242 [2018-12-09 12:05:42,985 WARN L180 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 299 DAG size of output: 217 [2018-12-09 12:05:45,870 WARN L180 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 268 DAG size of output: 230 [2018-12-09 12:05:47,793 WARN L180 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 302 DAG size of output: 220 [2018-12-09 12:05:50,823 WARN L180 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 270 DAG size of output: 232 [2018-12-09 12:05:52,766 WARN L180 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 214 [2018-12-09 12:05:55,438 WARN L180 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 266 DAG size of output: 228 [2018-12-09 12:05:56,877 WARN L180 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 159 [2018-12-09 12:05:59,926 WARN L180 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 311 DAG size of output: 234 [2018-12-09 12:06:01,356 WARN L180 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 184 [2018-12-09 12:06:03,267 WARN L180 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 187 [2018-12-09 12:06:05,143 WARN L180 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 190 [2018-12-09 12:06:06,695 WARN L180 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 184 [2018-12-09 12:06:08,260 WARN L180 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 165 [2018-12-09 12:06:10,294 WARN L180 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 105 [2018-12-09 12:06:13,097 WARN L180 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 155 [2018-12-09 12:06:15,459 WARN L180 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 231 DAG size of output: 192 [2018-12-09 12:06:18,740 WARN L180 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 262 DAG size of output: 224 [2018-12-09 12:06:22,107 WARN L180 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 267 DAG size of output: 229 [2018-12-09 12:06:23,524 WARN L180 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 159 [2018-12-09 12:06:25,247 WARN L180 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 70 [2018-12-09 12:06:28,096 WARN L180 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 315 DAG size of output: 213 [2018-12-09 12:06:30,250 WARN L180 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 227 [2018-12-09 12:06:33,707 WARN L180 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 313 DAG size of output: 211 [2018-12-09 12:06:35,948 WARN L180 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 363 DAG size of output: 221 [2018-12-09 12:06:37,674 WARN L180 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 207 [2018-12-09 12:06:39,849 WARN L180 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 323 DAG size of output: 223 [2018-12-09 12:06:40,838 WARN L180 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 122 [2018-12-09 12:06:42,712 WARN L180 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 202 [2018-12-09 12:06:43,550 WARN L180 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 103 [2018-12-09 12:06:44,586 WARN L180 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 194 [2018-12-09 12:06:48,099 WARN L180 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 308 DAG size of output: 231 [2018-12-09 12:06:50,896 WARN L180 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 320 DAG size of output: 243 [2018-12-09 12:06:53,623 WARN L180 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 299 DAG size of output: 217 [2018-12-09 12:06:56,622 WARN L180 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 268 DAG size of output: 230 [2018-12-09 12:06:59,316 WARN L180 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 302 DAG size of output: 220 [2018-12-09 12:07:02,336 WARN L180 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 270 DAG size of output: 232 [2018-12-09 12:07:04,314 WARN L180 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 167 [2018-12-09 12:07:07,077 WARN L180 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 215 [2018-12-09 12:07:09,135 WARN L180 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 187 [2018-12-09 12:07:11,273 WARN L180 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 190 [2018-12-09 12:07:12,689 WARN L180 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 165 [2018-12-09 12:07:13,139 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2018-12-09 12:07:16,413 WARN L180 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 285 DAG size of output: 243 [2018-12-09 12:07:17,980 WARN L180 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2018-12-09 12:07:21,310 WARN L180 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 272 DAG size of output: 234 [2018-12-09 12:07:23,594 WARN L180 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 187 [2018-12-09 12:07:25,622 WARN L180 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 224 DAG size of output: 205 [2018-12-09 12:07:28,258 WARN L180 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 214 DAG size of output: 200 [2018-12-09 12:07:30,337 WARN L180 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 246 DAG size of output: 224 [2018-12-09 12:07:32,585 WARN L180 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 305 DAG size of output: 223 [2018-12-09 12:07:35,979 WARN L180 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 325 DAG size of output: 245 [2018-12-09 12:07:37,316 WARN L180 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2018-12-09 12:07:39,535 WARN L180 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 221 DAG size of output: 212 [2018-12-09 12:07:41,507 WARN L180 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 193 [2018-12-09 12:07:45,121 WARN L180 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 303 DAG size of output: 218 [2018-12-09 12:07:46,770 WARN L180 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2018-12-09 12:07:48,853 WARN L180 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 224 DAG size of output: 215 [2018-12-09 12:07:51,736 WARN L180 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 199 [2018-12-09 12:07:53,704 WARN L180 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 221 DAG size of output: 202 [2018-12-09 12:07:54,322 WARN L180 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-12-09 12:07:56,552 WARN L180 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 245 DAG size of output: 226 [2018-12-09 12:07:58,323 WARN L180 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 202 DAG size of output: 187 [2018-12-09 12:08:00,543 WARN L180 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 265 DAG size of output: 237 [2018-12-09 12:08:04,987 WARN L180 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 315 DAG size of output: 237 [2018-12-09 12:08:07,558 WARN L180 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 312 DAG size of output: 208 [2018-12-09 12:08:08,313 WARN L180 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2018-12-09 12:08:08,962 WARN L180 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2018-12-09 12:08:09,498 WARN L180 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2018-12-09 12:08:14,392 WARN L180 SmtUtils]: Spent 2.73 s on a formula simplification. DAG size of input: 322 DAG size of output: 243 [2018-12-09 12:08:15,084 WARN L180 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2018-12-09 12:08:18,838 WARN L180 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 325 DAG size of output: 246 [2018-12-09 12:08:21,147 WARN L180 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 242 DAG size of output: 223 [2018-12-09 12:08:24,970 WARN L180 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 328 DAG size of output: 249 [2018-12-09 12:08:26,235 WARN L180 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-12-09 12:08:28,474 WARN L180 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 230 DAG size of output: 211 [2018-12-09 12:08:31,007 WARN L180 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 224 DAG size of output: 205 [2018-12-09 12:08:31,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:08:31,224 INFO L93 Difference]: Finished difference Result 441 states and 585 transitions. [2018-12-09 12:08:31,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2018-12-09 12:08:31,224 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 34 [2018-12-09 12:08:31,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:08:31,228 INFO L225 Difference]: With dead ends: 441 [2018-12-09 12:08:31,228 INFO L226 Difference]: Without dead ends: 430 [2018-12-09 12:08:31,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23821 ImplicationChecksByTransitivity, 290.3s TimeCoverageRelationStatistics Valid=7532, Invalid=61374, Unknown=0, NotChecked=0, Total=68906 [2018-12-09 12:08:31,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2018-12-09 12:08:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 287. [2018-12-09 12:08:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-12-09 12:08:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 396 transitions. [2018-12-09 12:08:31,302 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 396 transitions. Word has length 34 [2018-12-09 12:08:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:08:31,303 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 396 transitions. [2018-12-09 12:08:31,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-09 12:08:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 396 transitions. [2018-12-09 12:08:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-09 12:08:31,304 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:08:31,304 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:08:31,304 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:08:31,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:08:31,304 INFO L82 PathProgramCache]: Analyzing trace with hash -226885002, now seen corresponding path program 1 times [2018-12-09 12:08:31,304 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 12:08:31,304 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 12:08:31,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:08:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:08:31,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:08:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:08:32,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:08:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:08:35,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:08:35,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2018-12-09 12:08:35,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-12-09 12:08:35,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-12-09 12:08:35,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2533, Unknown=0, NotChecked=0, Total=2862 [2018-12-09 12:08:35,987 INFO L87 Difference]: Start difference. First operand 287 states and 396 transitions. Second operand 54 states. [2018-12-09 12:08:36,733 WARN L180 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 159 [2018-12-09 12:08:37,196 WARN L180 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2018-12-09 12:08:38,040 WARN L180 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 147 [2018-12-09 12:08:38,757 WARN L180 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2018-12-09 12:08:39,275 WARN L180 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2018-12-09 12:08:40,271 WARN L180 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 137 [2018-12-09 12:08:41,133 WARN L180 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2018-12-09 12:08:41,862 WARN L180 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2018-12-09 12:08:42,293 WARN L180 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2018-12-09 12:08:43,502 WARN L180 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2018-12-09 12:08:44,479 WARN L180 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2018-12-09 12:08:45,045 WARN L180 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 113 [2018-12-09 12:08:45,780 WARN L180 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 135 [2018-12-09 12:08:47,000 WARN L180 SmtUtils]: Spent 818.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2018-12-09 12:08:47,813 WARN L180 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2018-12-09 12:08:48,475 WARN L180 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2018-12-09 12:08:50,858 WARN L180 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 173 DAG size of output: 172 [2018-12-09 12:08:51,238 WARN L180 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2018-12-09 12:08:52,305 WARN L180 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2018-12-09 12:08:52,604 WARN L180 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2018-12-09 12:08:53,167 WARN L180 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 100 [2018-12-09 12:08:54,175 WARN L180 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 148 [2018-12-09 12:08:56,625 WARN L180 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 176 DAG size of output: 175 [2018-12-09 12:08:56,944 WARN L180 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2018-12-09 12:08:57,632 WARN L180 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2018-12-09 12:08:58,405 WARN L180 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2018-12-09 12:08:59,074 WARN L180 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2018-12-09 12:09:02,771 WARN L180 SmtUtils]: Spent 3.09 s on a formula simplification. DAG size of input: 180 DAG size of output: 177 [2018-12-09 12:09:03,159 WARN L180 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-12-09 12:09:03,526 WARN L180 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-12-09 12:09:03,836 WARN L180 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2018-12-09 12:09:05,012 WARN L180 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2018-12-09 12:09:05,489 WARN L180 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2018-12-09 12:09:07,489 WARN L180 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 170 DAG size of output: 153 [2018-12-09 12:09:07,861 WARN L180 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2018-12-09 12:09:08,587 WARN L180 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2018-12-09 12:09:08,855 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2018-12-09 12:09:09,537 WARN L180 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2018-12-09 12:09:10,246 WARN L180 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2018-12-09 12:09:10,888 WARN L180 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-12-09 12:09:13,795 WARN L180 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 185 DAG size of output: 181 [2018-12-09 12:09:14,223 WARN L180 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2018-12-09 12:09:14,591 WARN L180 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2018-12-09 12:09:14,904 WARN L180 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-12-09 12:09:18,630 WARN L180 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 187 DAG size of output: 183 [2018-12-09 12:09:19,285 WARN L180 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2018-12-09 12:09:19,766 WARN L180 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2018-12-09 12:09:20,270 WARN L180 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2018-12-09 12:09:20,647 WARN L180 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2018-12-09 12:09:22,556 WARN L180 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 182 DAG size of output: 132 [2018-12-09 12:09:24,187 WARN L180 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 174 DAG size of output: 156 [2018-12-09 12:09:26,873 WARN L180 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 184 DAG size of output: 179 [2018-12-09 12:09:28,092 WARN L180 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 154 [2018-12-09 12:09:28,371 WARN L180 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2018-12-09 12:09:29,012 WARN L180 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2018-12-09 12:09:30,079 WARN L180 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 149 [2018-12-09 12:09:31,272 WARN L180 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 144 [2018-12-09 12:09:32,056 WARN L180 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 131 [2018-12-09 12:09:32,531 WARN L180 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-12-09 12:09:33,000 WARN L180 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2018-12-09 12:09:33,567 WARN L180 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2018-12-09 12:09:33,857 WARN L180 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-12-09 12:09:34,742 WARN L180 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2018-12-09 12:09:35,464 WARN L180 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2018-12-09 12:09:35,985 WARN L180 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2018-12-09 12:09:36,258 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2018-12-09 12:09:37,625 WARN L180 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 154 DAG size of output: 134 [2018-12-09 12:09:38,910 WARN L180 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 119 [2018-12-09 12:09:40,215 WARN L180 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 133 [2018-12-09 12:09:40,696 WARN L180 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2018-12-09 12:09:41,576 WARN L180 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2018-12-09 12:09:42,436 WARN L180 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 139 [2018-12-09 12:09:43,135 WARN L180 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 88 [2018-12-09 12:09:43,887 WARN L180 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 64 [2018-12-09 12:09:45,224 WARN L180 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 118 [2018-12-09 12:09:46,339 WARN L180 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 118 [2018-12-09 12:09:47,245 WARN L180 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2018-12-09 12:09:47,616 WARN L180 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2018-12-09 12:09:48,535 WARN L180 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-12-09 12:09:49,485 WARN L180 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 121 [2018-12-09 12:09:50,150 WARN L180 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2018-12-09 12:09:51,020 WARN L180 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 122 [2018-12-09 12:09:52,351 WARN L180 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 130 [2018-12-09 12:09:53,143 WARN L180 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 131 [2018-12-09 12:09:54,504 WARN L180 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 161 DAG size of output: 141 [2018-12-09 12:09:55,048 WARN L180 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 103 [2018-12-09 12:09:55,595 WARN L180 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 112 [2018-12-09 12:09:56,513 WARN L180 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 119 [2018-12-09 12:09:56,918 WARN L180 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 100 [2018-12-09 12:09:57,317 WARN L180 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 109 [2018-12-09 12:09:57,950 WARN L180 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 97 [2018-12-09 12:09:58,273 WARN L180 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 88 [2018-12-09 12:09:58,617 WARN L180 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 97 [2018-12-09 12:09:59,047 WARN L180 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2018-12-09 12:09:59,562 WARN L180 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2018-12-09 12:09:59,825 WARN L180 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2018-12-09 12:10:00,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:10:00,019 INFO L93 Difference]: Finished difference Result 608 states and 856 transitions. [2018-12-09 12:10:00,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-12-09 12:10:00,019 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 34 [2018-12-09 12:10:00,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:10:00,021 INFO L225 Difference]: With dead ends: 608 [2018-12-09 12:10:00,021 INFO L226 Difference]: Without dead ends: 568 [2018-12-09 12:10:00,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11941 ImplicationChecksByTransitivity, 83.7s TimeCoverageRelationStatistics Valid=4953, Invalid=35649, Unknown=0, NotChecked=0, Total=40602 [2018-12-09 12:10:00,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2018-12-09 12:10:00,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 489. [2018-12-09 12:10:00,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2018-12-09 12:10:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 687 transitions. [2018-12-09 12:10:00,115 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 687 transitions. Word has length 34 [2018-12-09 12:10:00,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:10:00,115 INFO L480 AbstractCegarLoop]: Abstraction has 489 states and 687 transitions. [2018-12-09 12:10:00,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-12-09 12:10:00,116 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 687 transitions. [2018-12-09 12:10:00,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-09 12:10:00,117 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:10:00,117 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:10:00,117 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:10:00,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:10:00,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1706268918, now seen corresponding path program 2 times [2018-12-09 12:10:00,117 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 12:10:00,117 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 12:10:00,131 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-09 12:10:00,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 12:10:00,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:10:00,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:10:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:10:00,907 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:10:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:10:04,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:10:04,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2018-12-09 12:10:04,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-12-09 12:10:04,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-12-09 12:10:04,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=2485, Unknown=0, NotChecked=0, Total=2862 [2018-12-09 12:10:04,889 INFO L87 Difference]: Start difference. First operand 489 states and 687 transitions. Second operand 54 states. [2018-12-09 12:10:06,826 WARN L180 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 182 DAG size of output: 150 [2018-12-09 12:10:07,682 WARN L180 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2018-12-09 12:10:08,645 WARN L180 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 138 [2018-12-09 12:10:10,629 WARN L180 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 192 DAG size of output: 156 [2018-12-09 12:10:10,939 WARN L180 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2018-12-09 12:10:12,889 WARN L180 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 178 DAG size of output: 174 [2018-12-09 12:10:13,304 WARN L180 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-12-09 12:10:13,615 WARN L180 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2018-12-09 12:10:14,887 WARN L180 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 157 [2018-12-09 12:10:15,242 WARN L180 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-12-09 12:10:16,101 WARN L180 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 129 [2018-12-09 12:10:17,114 WARN L180 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 124 [2018-12-09 12:10:19,157 WARN L180 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 202 DAG size of output: 162 [2018-12-09 12:10:19,506 WARN L180 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2018-12-09 12:10:19,846 WARN L180 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2018-12-09 12:10:22,046 WARN L180 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 194 DAG size of output: 186 [2018-12-09 12:10:22,556 WARN L180 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2018-12-09 12:10:22,929 WARN L180 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2018-12-09 12:10:24,781 WARN L180 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 189 DAG size of output: 169 [2018-12-09 12:10:25,139 WARN L180 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-12-09 12:10:26,139 WARN L180 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 134 [2018-12-09 12:10:27,213 WARN L180 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 126 [2018-12-09 12:10:27,978 WARN L180 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 100 [2018-12-09 12:10:28,981 WARN L180 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 121 [2018-12-09 12:10:31,292 WARN L180 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 212 DAG size of output: 168 [2018-12-09 12:10:31,701 WARN L180 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-12-09 12:10:32,071 WARN L180 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2018-12-09 12:10:34,833 WARN L180 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 210 DAG size of output: 198 [2018-12-09 12:10:35,415 WARN L180 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2018-12-09 12:10:35,848 WARN L180 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-12-09 12:10:36,144 WARN L180 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2018-12-09 12:10:38,068 WARN L180 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 204 DAG size of output: 180 [2018-12-09 12:10:38,463 WARN L180 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-12-09 12:10:39,687 WARN L180 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 139 [2018-12-09 12:10:39,980 WARN L180 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2018-12-09 12:10:40,916 WARN L180 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 131 [2018-12-09 12:10:41,972 WARN L180 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 123 [2018-12-09 12:10:42,981 WARN L180 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 118 [2018-12-09 12:10:45,538 WARN L180 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 223 DAG size of output: 175 [2018-12-09 12:10:45,977 WARN L180 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-12-09 12:10:46,398 WARN L180 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-12-09 12:10:46,691 WARN L180 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2018-12-09 12:10:49,611 WARN L180 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 223 DAG size of output: 207 [2018-12-09 12:10:50,236 WARN L180 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2018-12-09 12:10:50,686 WARN L180 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2018-12-09 12:10:51,020 WARN L180 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-12-09 12:10:53,330 WARN L180 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 226 DAG size of output: 150 [2018-12-09 12:10:55,056 WARN L180 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 214 DAG size of output: 186 [2018-12-09 12:10:57,462 WARN L180 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 222 DAG size of output: 174 [2018-12-09 12:10:58,755 WARN L180 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 144 [2018-12-09 12:10:59,781 WARN L180 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 136 [2018-12-09 12:11:00,741 WARN L180 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 128 [2018-12-09 12:11:01,734 WARN L180 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 120 [2018-12-09 12:11:02,482 WARN L180 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 115 [2018-12-09 12:11:03,224 WARN L180 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2018-12-09 12:11:04,111 WARN L180 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2018-12-09 12:11:06,124 WARN L180 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 225 DAG size of output: 149 [2018-12-09 12:11:07,380 WARN L180 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 128 [2018-12-09 12:11:08,059 WARN L180 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 105 [2018-12-09 12:11:08,763 WARN L180 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 105 [2018-12-09 12:11:09,261 WARN L180 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-12-09 12:11:10,650 WARN L180 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 41 [2018-12-09 12:11:11,773 WARN L180 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 117 [2018-12-09 12:11:12,527 WARN L180 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 112 [2018-12-09 12:11:13,100 WARN L180 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 30 [2018-12-09 12:11:13,700 WARN L180 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 43 [2018-12-09 12:11:14,695 WARN L180 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 120 [2018-12-09 12:11:15,607 WARN L180 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 119 [2018-12-09 12:11:16,616 WARN L180 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 124 [2018-12-09 12:11:17,407 WARN L180 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 128 [2018-12-09 12:11:18,007 WARN L180 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 115 [2018-12-09 12:11:19,142 WARN L180 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 129 [2018-12-09 12:11:19,968 WARN L180 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 101 [2018-12-09 12:11:20,605 WARN L180 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 47 [2018-12-09 12:11:21,498 WARN L180 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 120 [2018-12-09 12:11:22,065 WARN L180 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 58 [2018-12-09 12:11:22,657 WARN L180 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 120 [2018-12-09 12:11:23,281 WARN L180 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 57 [2018-12-09 12:11:23,736 WARN L180 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 37 [2018-12-09 12:11:24,431 WARN L180 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 120 [2018-12-09 12:11:24,935 WARN L180 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 59 [2018-12-09 12:11:25,501 WARN L180 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 61 [2018-12-09 12:11:25,901 WARN L180 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 51 [2018-12-09 12:11:26,963 WARN L180 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 124 [2018-12-09 12:11:27,817 WARN L180 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 109 [2018-12-09 12:11:28,639 WARN L180 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 108 [2018-12-09 12:11:29,614 WARN L180 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 111 [2018-12-09 12:11:30,615 WARN L180 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 111 [2018-12-09 12:11:31,412 WARN L180 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 102 [2018-12-09 12:11:31,924 WARN L180 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 96 [2018-12-09 12:11:32,608 WARN L180 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 101 [2018-12-09 12:11:33,410 WARN L180 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 105 [2018-12-09 12:11:34,650 WARN L180 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 127 [2018-12-09 12:11:35,446 WARN L180 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 107 [2018-12-09 12:11:35,987 WARN L180 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 59 [2018-12-09 12:11:36,626 WARN L180 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 52 [2018-12-09 12:11:37,525 WARN L180 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 127 [2018-12-09 12:11:38,590 WARN L180 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 113 [2018-12-09 12:11:38,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:11:38,629 INFO L93 Difference]: Finished difference Result 811 states and 1139 transitions. [2018-12-09 12:11:38,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-12-09 12:11:38,631 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 34 [2018-12-09 12:11:38,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:11:38,632 INFO L225 Difference]: With dead ends: 811 [2018-12-09 12:11:38,632 INFO L226 Difference]: Without dead ends: 757 [2018-12-09 12:11:38,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12076 ImplicationChecksByTransitivity, 93.4s TimeCoverageRelationStatistics Valid=5879, Invalid=35127, Unknown=0, NotChecked=0, Total=41006 [2018-12-09 12:11:38,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2018-12-09 12:11:38,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 660. [2018-12-09 12:11:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2018-12-09 12:11:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 928 transitions. [2018-12-09 12:11:38,752 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 928 transitions. Word has length 34 [2018-12-09 12:11:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:11:38,752 INFO L480 AbstractCegarLoop]: Abstraction has 660 states and 928 transitions. [2018-12-09 12:11:38,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-12-09 12:11:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 928 transitions. [2018-12-09 12:11:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-09 12:11:38,753 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:11:38,753 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:11:38,754 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:11:38,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:11:38,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1272006578, now seen corresponding path program 3 times [2018-12-09 12:11:38,754 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 12:11:38,754 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e7b7bc22-d6aa-40f5-bab4-cb344343c76e/bin-2019/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 12:11:38,767 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-12-09 12:11:38,796 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-09 12:11:38,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:11:38,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:11:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:11:40,460 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 12:11:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:11:45,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:11:45,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2018-12-09 12:11:45,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-09 12:11:45,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-09 12:11:45,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2018-12-09 12:11:45,315 INFO L87 Difference]: Start difference. First operand 660 states and 928 transitions. Second operand 56 states. [2018-12-09 12:11:45,779 WARN L180 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 98 [2018-12-09 12:11:47,332 WARN L180 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 238 DAG size of output: 217 [2018-12-09 12:11:48,415 WARN L180 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 199 [2018-12-09 12:11:48,827 WARN L180 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 108 [2018-12-09 12:11:49,614 WARN L180 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 159 [2018-12-09 12:11:52,262 WARN L180 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 256 DAG size of output: 251 [2018-12-09 12:11:53,126 WARN L180 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-12-09 12:11:53,848 WARN L180 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2018-12-09 12:11:54,217 WARN L180 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-12-09 12:11:55,221 WARN L180 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 194 [2018-12-09 12:11:55,507 WARN L180 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 120 [2018-12-09 12:11:57,088 WARN L180 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 217 DAG size of output: 196 [2018-12-09 12:11:59,643 WARN L180 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 269 DAG size of output: 248 [2018-12-09 12:12:01,309 WARN L180 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 194 [2018-12-09 12:12:02,643 WARN L180 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 195 [2018-12-09 12:12:03,438 WARN L180 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 150 [2018-12-09 12:12:05,113 WARN L180 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 288 DAG size of output: 210 [2018-12-09 12:12:05,733 WARN L180 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2018-12-09 12:12:06,391 WARN L180 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2018-12-09 12:12:08,014 WARN L180 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 159 [2018-12-09 12:12:10,517 WARN L180 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 270 DAG size of output: 207 [2018-12-09 12:12:11,744 WARN L180 SmtUtils]: Spent 607.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2018-12-09 12:12:12,637 WARN L180 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-12-09 12:12:13,099 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-12-09 12:12:14,636 WARN L180 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 167 [2018-12-09 12:12:16,532 WARN L180 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 310 DAG size of output: 195 [2018-12-09 12:12:18,244 WARN L180 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 248 DAG size of output: 227 [2018-12-09 12:12:21,014 WARN L180 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 283 DAG size of output: 220 [2018-12-09 12:12:22,064 WARN L180 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 191 [2018-12-09 12:12:23,939 WARN L180 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 229 DAG size of output: 213 [2018-12-09 12:12:24,315 WARN L180 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2018-12-09 12:12:25,940 WARN L180 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 227 DAG size of output: 211 [2018-12-09 12:12:27,584 WARN L180 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 184 [2018-12-09 12:12:28,663 WARN L180 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 177 [2018-12-09 12:12:29,879 WARN L180 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 178 [2018-12-09 12:12:30,874 WARN L180 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 182 [2018-12-09 12:12:31,663 WARN L180 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 147 [2018-12-09 12:12:33,087 WARN L180 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 185 [2018-12-09 12:12:33,766 WARN L180 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2018-12-09 12:12:35,749 WARN L180 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 244 DAG size of output: 212 [2018-12-09 12:12:36,231 WARN L180 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2018-12-09 12:12:36,811 WARN L180 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2018-12-09 12:12:38,139 WARN L180 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 149 [2018-12-09 12:12:39,478 WARN L180 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 149 [2018-12-09 12:12:41,066 WARN L180 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 223 DAG size of output: 207 [2018-12-09 12:12:43,528 WARN L180 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 258 DAG size of output: 226 [2018-12-09 12:12:45,036 WARN L180 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 203 [2018-12-09 12:12:45,635 WARN L180 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-12-09 12:12:48,122 WARN L180 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 277 DAG size of output: 213 [2018-12-09 12:12:49,814 WARN L180 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 169 [2018-12-09 12:12:51,753 WARN L180 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 307 DAG size of output: 192 [2018-12-09 12:12:53,234 WARN L180 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 160 [2018-12-09 12:12:54,769 WARN L180 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 217 [2018-12-09 12:12:56,774 WARN L180 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 269 DAG size of output: 205 [2018-12-09 12:12:59,034 WARN L180 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 255 DAG size of output: 223 [2018-12-09 12:13:00,637 WARN L180 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 214 [2018-12-09 12:13:02,495 WARN L180 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 188 [2018-12-09 12:13:03,475 WARN L180 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 182 [2018-12-09 12:13:04,546 WARN L180 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 172 [2018-12-09 12:13:05,641 WARN L180 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 175 [2018-12-09 12:13:06,164 WARN L180 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2018-12-09 12:13:07,215 WARN L180 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 146 [2018-12-09 12:13:08,399 WARN L180 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 194 [2018-12-09 12:13:08,936 WARN L180 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 143 [2018-12-09 12:13:10,058 WARN L180 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 181 [2018-12-09 12:13:10,810 WARN L180 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2018-12-09 12:13:13,391 WARN L180 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 236 DAG size of output: 204 [2018-12-09 12:13:14,873 WARN L180 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 148 [2018-12-09 12:13:16,056 WARN L180 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 147 [2018-12-09 12:13:17,696 WARN L180 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 191 [2018-12-09 12:13:19,922 WARN L180 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 240 DAG size of output: 208 [2018-12-09 12:13:21,048 WARN L180 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2018-12-09 12:13:23,616 WARN L180 SmtUtils]: Spent 999.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 199 [2018-12-09 12:13:25,568 WARN L180 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 239 DAG size of output: 207 [2018-12-09 12:13:26,066 WARN L180 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2018-12-09 12:13:27,000 WARN L180 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 150 [2018-12-09 12:13:27,892 WARN L180 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 144 [2018-12-09 12:13:29,270 WARN L180 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 120 [2018-12-09 12:13:31,072 WARN L180 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 197 [2018-12-09 12:13:33,016 WARN L180 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 242 DAG size of output: 210 [2018-12-09 12:13:34,162 WARN L180 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 194 [2018-12-09 12:13:36,211 WARN L180 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 202 [2018-12-09 12:13:37,397 WARN L180 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 180 [2018-12-09 12:13:38,407 WARN L180 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 185 [2018-12-09 12:13:41,818 WARN L180 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 286 DAG size of output: 225 [2018-12-09 12:13:42,888 WARN L180 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 140 [2018-12-09 12:13:43,857 WARN L180 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 118 [2018-12-09 12:13:44,422 WARN L180 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2018-12-09 12:13:44,978 WARN L180 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-12-09 12:13:48,076 WARN L180 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 291 DAG size of output: 230 [2018-12-09 12:13:51,901 WARN L180 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 186 [2018-12-09 12:13:54,428 WARN L180 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 271 DAG size of output: 207 [2018-12-09 12:13:57,405 WARN L180 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 294 DAG size of output: 233 [2018-12-09 12:13:58,536 WARN L180 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 115 [2018-12-09 12:14:00,799 WARN L180 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 191 [2018-12-09 12:14:01,124 WARN L180 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2018-12-09 12:14:02,877 WARN L180 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 194 [2018-12-09 12:14:03,752 WARN L180 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 149 [2018-12-09 12:14:06,438 WARN L180 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 270 DAG size of output: 206 [2018-12-09 12:14:09,154 WARN L180 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 275 DAG size of output: 211 [2018-12-09 12:14:10,175 WARN L180 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 156 [2018-12-09 12:14:12,107 WARN L180 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 266 DAG size of output: 202 [2018-12-09 12:14:14,287 WARN L180 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 270 DAG size of output: 206 [2018-12-09 12:14:15,495 WARN L180 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 96 [2018-12-09 12:14:18,136 WARN L180 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 272 DAG size of output: 208 [2018-12-09 12:14:19,336 WARN L180 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 158 [2018-12-09 12:14:20,404 WARN L180 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 178 [2018-12-09 12:14:21,591 WARN L180 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 167 [2018-12-09 12:14:24,540 WARN L180 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 295 DAG size of output: 233 [2018-12-09 12:14:25,479 WARN L180 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 156 [2018-12-09 12:14:27,551 WARN L180 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 228 DAG size of output: 196 [2018-12-09 12:14:27,972 WARN L180 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 97 [2018-12-09 12:14:28,529 WARN L180 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 159 [2018-12-09 12:14:31,334 WARN L180 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 234 DAG size of output: 220 [2018-12-09 12:14:33,660 WARN L180 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 215 DAG size of output: 211 [2018-12-09 12:14:36,202 WARN L180 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 295 DAG size of output: 220 [2018-12-09 12:14:37,189 WARN L180 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 156 [2018-12-09 12:14:38,218 WARN L180 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 52 [2018-12-09 12:14:39,676 WARN L180 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 148 [2018-12-09 12:14:40,798 WARN L180 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 137 [2018-12-09 12:14:43,468 WARN L180 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 308 DAG size of output: 223 [2018-12-09 12:14:45,689 WARN L180 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 228 DAG size of output: 224 [2018-12-09 12:14:47,038 WARN L180 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 163 [2018-12-09 12:14:49,173 WARN L180 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 231 DAG size of output: 199 [2018-12-09 12:14:50,110 WARN L180 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 169 [2018-12-09 12:14:52,720 WARN L180 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 278 DAG size of output: 213 [2018-12-09 12:14:55,805 WARN L180 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 298 DAG size of output: 236 [2018-12-09 12:14:57,130 WARN L180 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 176 [2018-12-09 12:14:59,951 WARN L180 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 197 [2018-12-09 12:15:02,347 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2018-12-09 12:15:02,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2018-12-09 12:15:02,348 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. stderr output: (error "out of memory") 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:650) 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:151) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:354) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:382) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:699) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) 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) ... 49 more [2018-12-09 12:15:02,350 INFO L168 Benchmark]: Toolchain (without parser) took 703936.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -150.6 MB). Peak memory consumption was 327.8 MB. Max. memory is 11.5 GB. [2018-12-09 12:15:02,350 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:15:02,350 INFO L168 Benchmark]: CACSL2BoogieTranslator took 123.36 ms. Allocated memory is still 1.0 GB. Free memory was 944.7 MB in the beginning and 934.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 12:15:02,350 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.78 ms. Allocated memory is still 1.0 GB. Free memory is still 934.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:15:02,350 INFO L168 Benchmark]: Boogie Preprocessor took 13.92 ms. Allocated memory is still 1.0 GB. Free memory was 934.0 MB in the beginning and 928.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-09 12:15:02,350 INFO L168 Benchmark]: RCFGBuilder took 153.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 928.6 MB in the beginning and 1.1 GB in the end (delta: -182.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 11.5 GB. [2018-12-09 12:15:02,350 INFO L168 Benchmark]: TraceAbstraction took 703630.75 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 4.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 15.7 MB). Peak memory consumption was 360.5 MB. Max. memory is 11.5 GB. [2018-12-09 12:15:02,351 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 123.36 ms. Allocated memory is still 1.0 GB. Free memory was 944.7 MB in the beginning and 934.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.78 ms. Allocated memory is still 1.0 GB. Free memory is still 934.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.92 ms. Allocated memory is still 1.0 GB. Free memory was 934.0 MB in the beginning and 928.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 153.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 928.6 MB in the beginning and 1.1 GB in the end (delta: -182.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 703630.75 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 4.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 15.7 MB). Peak memory consumption was 360.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : 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...