./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/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 9cd87c15c4637a3ecd407847e5a675763d5fece5 .............................................................................................................................................................................................................................................. 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_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/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 9cd87c15c4637a3ecd407847e5a675763d5fece5 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 12:02:11,517 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 12:02:11,518 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 12:02:11,525 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 12:02:11,525 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 12:02:11,526 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 12:02:11,526 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 12:02:11,528 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 12:02:11,529 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 12:02:11,529 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 12:02:11,530 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 12:02:11,530 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 12:02:11,531 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 12:02:11,532 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 12:02:11,532 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 12:02:11,533 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 12:02:11,533 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 12:02:11,535 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 12:02:11,536 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 12:02:11,537 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 12:02:11,538 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 12:02:11,539 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 12:02:11,540 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 12:02:11,541 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 12:02:11,541 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 12:02:11,541 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 12:02:11,542 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 12:02:11,542 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 12:02:11,543 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 12:02:11,543 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 12:02:11,543 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 12:02:11,544 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 12:02:11,544 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 12:02:11,544 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 12:02:11,545 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 12:02:11,545 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 12:02:11,545 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 12:02:11,552 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 12:02:11,552 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 12:02:11,553 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 12:02:11,553 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 12:02:11,553 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 12:02:11,553 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 12:02:11,554 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 12:02:11,554 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 12:02:11,554 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 12:02:11,554 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 12:02:11,554 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 12:02:11,554 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 12:02:11,554 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 12:02:11,555 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 12:02:11,555 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 12:02:11,555 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 12:02:11,555 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 12:02:11,555 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 12:02:11,555 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 12:02:11,555 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 12:02:11,556 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 12:02:11,556 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 12:02:11,556 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 12:02:11,556 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:02:11,556 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 12:02:11,556 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 12:02:11,557 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 12:02:11,557 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 12:02:11,557 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 12:02:11,557 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 12:02:11,557 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_bc072343-1f87-4c0d-baac-73049b9745af/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 -> 9cd87c15c4637a3ecd407847e5a675763d5fece5 [2018-11-18 12:02:11,579 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 12:02:11,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 12:02:11,588 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 12:02:11,589 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 12:02:11,589 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 12:02:11,589 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/../../sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-11-18 12:02:11,628 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/data/1e0e1a91d/f22d63ed96304efb95e290f6aaa9c379/FLAG6d7f4f906 [2018-11-18 12:02:11,952 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 12:02:11,953 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-11-18 12:02:11,957 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/data/1e0e1a91d/f22d63ed96304efb95e290f6aaa9c379/FLAG6d7f4f906 [2018-11-18 12:02:12,387 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/data/1e0e1a91d/f22d63ed96304efb95e290f6aaa9c379 [2018-11-18 12:02:12,389 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 12:02:12,390 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 12:02:12,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 12:02:12,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 12:02:12,393 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 12:02:12,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:02:12" (1/1) ... [2018-11-18 12:02:12,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6180e9b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:12, skipping insertion in model container [2018-11-18 12:02:12,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:02:12" (1/1) ... [2018-11-18 12:02:12,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 12:02:12,415 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 12:02:12,522 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:02:12,525 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 12:02:12,534 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:02:12,543 INFO L195 MainTranslator]: Completed translation [2018-11-18 12:02:12,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:12 WrapperNode [2018-11-18 12:02:12,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 12:02:12,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 12:02:12,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 12:02:12,544 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 12:02:12,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:12" (1/1) ... [2018-11-18 12:02:12,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:12" (1/1) ... [2018-11-18 12:02:12,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:12" (1/1) ... [2018-11-18 12:02:12,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:12" (1/1) ... [2018-11-18 12:02:12,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:12" (1/1) ... [2018-11-18 12:02:12,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:12" (1/1) ... [2018-11-18 12:02:12,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:12" (1/1) ... [2018-11-18 12:02:12,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 12:02:12,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 12:02:12,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 12:02:12,562 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 12:02:12,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:02:12,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 12:02:12,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 12:02:12,648 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2018-11-18 12:02:12,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 12:02:12,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 12:02:12,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 12:02:12,648 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2018-11-18 12:02:12,648 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 12:02:12,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 12:02:12,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 12:02:12,768 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 12:02:12,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:02:12 BoogieIcfgContainer [2018-11-18 12:02:12,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 12:02:12,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 12:02:12,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 12:02:12,771 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 12:02:12,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 12:02:12" (1/3) ... [2018-11-18 12:02:12,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e22dcc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:02:12, skipping insertion in model container [2018-11-18 12:02:12,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:12" (2/3) ... [2018-11-18 12:02:12,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e22dcc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:02:12, skipping insertion in model container [2018-11-18 12:02:12,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:02:12" (3/3) ... [2018-11-18 12:02:12,774 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03_false-unreach-call_true-termination.c [2018-11-18 12:02:12,783 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 12:02:12,791 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 12:02:12,806 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 12:02:12,833 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 12:02:12,833 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 12:02:12,834 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 12:02:12,834 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 12:02:12,834 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 12:02:12,834 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 12:02:12,834 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 12:02:12,834 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 12:02:12,834 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 12:02:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-11-18 12:02:12,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 12:02:12,855 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:12,855 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:12,858 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:02:12,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:12,863 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2018-11-18 12:02:12,864 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:02:12,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:02:12,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:12,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:12,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 12:02:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 12:02:12,962 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 12:02:12,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 12:02:12 BoogieIcfgContainer [2018-11-18 12:02:12,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 12:02:12,977 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 12:02:12,977 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 12:02:12,977 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 12:02:12,978 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:02:12" (3/4) ... [2018-11-18 12:02:12,980 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-18 12:02:12,980 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 12:02:12,981 INFO L168 Benchmark]: Toolchain (without parser) took 591.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 958.2 MB in the beginning and 1.1 GB in the end (delta: -147.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:02:12,982 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:02:12,983 INFO L168 Benchmark]: CACSL2BoogieTranslator took 152.31 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:02:12,983 INFO L168 Benchmark]: Boogie Preprocessor took 18.41 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:02:12,983 INFO L168 Benchmark]: RCFGBuilder took 206.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -176.5 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2018-11-18 12:02:12,984 INFO L168 Benchmark]: TraceAbstraction took 208.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-18 12:02:12,984 INFO L168 Benchmark]: Witness Printer took 3.37 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:02:12,986 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 152.31 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.41 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 206.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -176.5 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 208.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Witness Printer took 3.37 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 34]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 31. Possible FailurePath: [L25] int n = __VERIFIER_nondet_int(); [L26] COND FALSE !(n < 1) VAL [n=1] [L29] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L17] COND TRUE n == 1 [L18] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L29] EXPR hanoi(n) VAL [hanoi(n)=1, n=1] [L29] unsigned result = hanoi(n); [L31] COND FALSE !(result+1>0 && result+1 == 1< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/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 -> 9cd87c15c4637a3ecd407847e5a675763d5fece5 [2018-11-18 12:02:14,523 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 12:02:14,531 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 12:02:14,533 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 12:02:14,534 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 12:02:14,534 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 12:02:14,535 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/../../sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-11-18 12:02:14,572 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/data/ade2f7e7c/e5f81ea4eb8c4a7c80d77c1a00e3288c/FLAGe7eda741e [2018-11-18 12:02:14,894 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 12:02:14,894 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/sv-benchmarks/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-11-18 12:02:14,898 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/data/ade2f7e7c/e5f81ea4eb8c4a7c80d77c1a00e3288c/FLAGe7eda741e [2018-11-18 12:02:15,331 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/data/ade2f7e7c/e5f81ea4eb8c4a7c80d77c1a00e3288c [2018-11-18 12:02:15,333 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 12:02:15,334 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 12:02:15,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 12:02:15,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 12:02:15,337 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 12:02:15,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:02:15" (1/1) ... [2018-11-18 12:02:15,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37e5b693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:15, skipping insertion in model container [2018-11-18 12:02:15,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:02:15" (1/1) ... [2018-11-18 12:02:15,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 12:02:15,359 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 12:02:15,489 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:02:15,493 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 12:02:15,504 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:02:15,513 INFO L195 MainTranslator]: Completed translation [2018-11-18 12:02:15,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:15 WrapperNode [2018-11-18 12:02:15,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 12:02:15,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 12:02:15,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 12:02:15,514 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 12:02:15,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:15" (1/1) ... [2018-11-18 12:02:15,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:15" (1/1) ... [2018-11-18 12:02:15,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:15" (1/1) ... [2018-11-18 12:02:15,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:15" (1/1) ... [2018-11-18 12:02:15,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:15" (1/1) ... [2018-11-18 12:02:15,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:15" (1/1) ... [2018-11-18 12:02:15,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:15" (1/1) ... [2018-11-18 12:02:15,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 12:02:15,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 12:02:15,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 12:02:15,533 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 12:02:15,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:02:15,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 12:02:15,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 12:02:15,569 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2018-11-18 12:02:15,570 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 12:02:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 12:02:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 12:02:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2018-11-18 12:02:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 12:02:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 12:02:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 12:02:15,712 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 12:02:15,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:02:15 BoogieIcfgContainer [2018-11-18 12:02:15,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 12:02:15,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 12:02:15,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 12:02:15,716 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 12:02:15,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 12:02:15" (1/3) ... [2018-11-18 12:02:15,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee35dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:02:15, skipping insertion in model container [2018-11-18 12:02:15,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:15" (2/3) ... [2018-11-18 12:02:15,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee35dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:02:15, skipping insertion in model container [2018-11-18 12:02:15,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:02:15" (3/3) ... [2018-11-18 12:02:15,719 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03_false-unreach-call_true-termination.c [2018-11-18 12:02:15,728 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 12:02:15,734 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 12:02:15,745 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 12:02:15,762 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 12:02:15,762 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 12:02:15,763 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 12:02:15,763 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 12:02:15,763 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 12:02:15,763 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 12:02:15,763 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 12:02:15,763 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 12:02:15,763 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 12:02:15,776 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-11-18 12:02:15,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 12:02:15,782 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:15,782 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:15,784 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:02:15,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:15,789 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2018-11-18 12:02:15,792 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:02:15,793 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:02:15,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:15,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:02:15,936 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 12:02:15,939 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:02:15,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-18 12:02:15,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 12:02:15,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 12:02:15,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-18 12:02:15,951 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2018-11-18 12:02:16,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:16,082 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2018-11-18 12:02:16,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 12:02:16,084 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-11-18 12:02:16,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:16,092 INFO L225 Difference]: With dead ends: 35 [2018-11-18 12:02:16,093 INFO L226 Difference]: Without dead ends: 19 [2018-11-18 12:02:16,095 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-18 12:02:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-18 12:02:16,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-18 12:02:16,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-18 12:02:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-11-18 12:02:16,124 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-11-18 12:02:16,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:16,125 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-11-18 12:02:16,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 12:02:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-11-18 12:02:16,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 12:02:16,126 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:16,127 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:16,127 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:02:16,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:16,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times [2018-11-18 12:02:16,128 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:02:16,128 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:02:16,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:16,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:02:16,246 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:02:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 12:02:16,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:02:16,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-11-18 12:02:16,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 12:02:16,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 12:02:16,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-11-18 12:02:16,701 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 16 states. [2018-11-18 12:02:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:16,997 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-11-18 12:02:16,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 12:02:16,998 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2018-11-18 12:02:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:16,998 INFO L225 Difference]: With dead ends: 31 [2018-11-18 12:02:16,999 INFO L226 Difference]: Without dead ends: 25 [2018-11-18 12:02:16,999 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2018-11-18 12:02:17,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-18 12:02:17,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-11-18 12:02:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-18 12:02:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-11-18 12:02:17,004 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-11-18 12:02:17,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:17,004 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-11-18 12:02:17,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 12:02:17,004 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-11-18 12:02:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 12:02:17,005 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:17,005 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:17,006 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:02:17,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:17,006 INFO L82 PathProgramCache]: Analyzing trace with hash -547108535, now seen corresponding path program 2 times [2018-11-18 12:02:17,006 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:02:17,006 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:02:17,018 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-18 12:02:17,044 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:02:17,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:02:17,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 12:02:17,197 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:02:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 12:02:17,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:02:17,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2018-11-18 12:02:17,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-18 12:02:17,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-18 12:02:17,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2018-11-18 12:02:17,983 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 26 states. [2018-11-18 12:02:18,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:18,482 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2018-11-18 12:02:18,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 12:02:18,483 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 32 [2018-11-18 12:02:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:18,484 INFO L225 Difference]: With dead ends: 37 [2018-11-18 12:02:18,484 INFO L226 Difference]: Without dead ends: 31 [2018-11-18 12:02:18,485 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2018-11-18 12:02:18,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-18 12:02:18,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-18 12:02:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-18 12:02:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-11-18 12:02:18,490 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 32 [2018-11-18 12:02:18,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:18,491 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-11-18 12:02:18,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-18 12:02:18,491 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-11-18 12:02:18,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-18 12:02:18,492 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:18,492 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:18,492 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:02:18,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:18,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1461718089, now seen corresponding path program 3 times [2018-11-18 12:02:18,493 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:02:18,493 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:02:18,514 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-18 12:02:18,580 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-18 12:02:18,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:02:18,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 12:02:18,789 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:02:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 12:02:20,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:02:20,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2018-11-18 12:02:20,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-18 12:02:20,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-18 12:02:20,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 12:02:20,291 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 36 states. [2018-11-18 12:02:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:21,084 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-11-18 12:02:21,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-18 12:02:21,085 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2018-11-18 12:02:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:21,085 INFO L225 Difference]: With dead ends: 43 [2018-11-18 12:02:21,085 INFO L226 Difference]: Without dead ends: 37 [2018-11-18 12:02:21,087 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2018-11-18 12:02:21,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-18 12:02:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-11-18 12:02:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-18 12:02:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-11-18 12:02:21,092 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 44 [2018-11-18 12:02:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:21,093 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-11-18 12:02:21,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-18 12:02:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-11-18 12:02:21,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-18 12:02:21,094 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:21,094 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:21,095 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:02:21,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:21,095 INFO L82 PathProgramCache]: Analyzing trace with hash 585432905, now seen corresponding path program 4 times [2018-11-18 12:02:21,095 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:02:21,095 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:02:21,115 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:02:21,140 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:02:21,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:02:21,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-18 12:02:21,378 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:02:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-11-18 12:02:23,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:02:23,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2018-11-18 12:02:23,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-18 12:02:23,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-18 12:02:23,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2018-11-18 12:02:23,557 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 46 states. [2018-11-18 12:02:24,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:24,681 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2018-11-18 12:02:24,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-18 12:02:24,682 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 56 [2018-11-18 12:02:24,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:24,683 INFO L225 Difference]: With dead ends: 49 [2018-11-18 12:02:24,683 INFO L226 Difference]: Without dead ends: 43 [2018-11-18 12:02:24,684 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2018-11-18 12:02:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-18 12:02:24,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-11-18 12:02:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-18 12:02:24,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-11-18 12:02:24,688 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 56 [2018-11-18 12:02:24,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:24,688 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-11-18 12:02:24,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-18 12:02:24,688 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-11-18 12:02:24,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-18 12:02:24,689 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:24,689 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:24,690 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:02:24,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:24,690 INFO L82 PathProgramCache]: Analyzing trace with hash 579248713, now seen corresponding path program 5 times [2018-11-18 12:02:24,690 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:02:24,690 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:02:24,702 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-11-18 12:02:24,821 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-11-18 12:02:24,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:02:24,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-18 12:02:25,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:02:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-18 12:02:28,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:02:28,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2018-11-18 12:02:28,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-11-18 12:02:28,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-11-18 12:02:28,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2018-11-18 12:02:28,444 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 56 states. [2018-11-18 12:02:30,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:30,049 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2018-11-18 12:02:30,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-18 12:02:30,049 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 68 [2018-11-18 12:02:30,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:30,050 INFO L225 Difference]: With dead ends: 55 [2018-11-18 12:02:30,050 INFO L226 Difference]: Without dead ends: 49 [2018-11-18 12:02:30,051 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2018-11-18 12:02:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-18 12:02:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-11-18 12:02:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-18 12:02:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-11-18 12:02:30,056 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 68 [2018-11-18 12:02:30,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:30,056 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-11-18 12:02:30,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-11-18 12:02:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-11-18 12:02:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-18 12:02:30,057 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:30,057 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:30,058 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:02:30,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:30,058 INFO L82 PathProgramCache]: Analyzing trace with hash 584643913, now seen corresponding path program 6 times [2018-11-18 12:02:30,058 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:02:30,058 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:02:30,070 INFO L101 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2018-11-18 12:02:30,277 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-11-18 12:02:30,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:02:30,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-18 12:02:30,652 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:02:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-11-18 12:02:35,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:02:35,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39] total 66 [2018-11-18 12:02:35,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-11-18 12:02:35,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-11-18 12:02:35,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2018-11-18 12:02:35,427 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 66 states. [2018-11-18 12:02:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:37,407 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-11-18 12:02:37,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-18 12:02:37,407 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 80 [2018-11-18 12:02:37,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:37,408 INFO L225 Difference]: With dead ends: 61 [2018-11-18 12:02:37,408 INFO L226 Difference]: Without dead ends: 55 [2018-11-18 12:02:37,410 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2018-11-18 12:02:37,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-18 12:02:37,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-11-18 12:02:37,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-18 12:02:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-11-18 12:02:37,415 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 80 [2018-11-18 12:02:37,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:37,415 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-11-18 12:02:37,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-11-18 12:02:37,416 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-11-18 12:02:37,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-11-18 12:02:37,416 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:37,416 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:37,416 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:02:37,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:37,417 INFO L82 PathProgramCache]: Analyzing trace with hash 498071625, now seen corresponding path program 7 times [2018-11-18 12:02:37,417 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:02:37,417 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:02:37,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:02:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:37,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-18 12:02:38,089 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:02:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-11-18 12:02:43,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:02:43,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45] total 76 [2018-11-18 12:02:43,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-11-18 12:02:43,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-11-18 12:02:43,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2018-11-18 12:02:43,987 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 76 states. [2018-11-18 12:02:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:46,270 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-11-18 12:02:46,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-18 12:02:46,271 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 92 [2018-11-18 12:02:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:46,272 INFO L225 Difference]: With dead ends: 67 [2018-11-18 12:02:46,272 INFO L226 Difference]: Without dead ends: 61 [2018-11-18 12:02:46,274 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2018-11-18 12:02:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-18 12:02:46,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-11-18 12:02:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-18 12:02:46,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-11-18 12:02:46,280 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 92 [2018-11-18 12:02:46,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:46,280 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-11-18 12:02:46,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-11-18 12:02:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-11-18 12:02:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-11-18 12:02:46,282 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:46,282 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:46,282 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:02:46,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:46,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2044701513, now seen corresponding path program 8 times [2018-11-18 12:02:46,283 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:02:46,283 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:02:46,295 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-18 12:02:46,347 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:02:46,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:02:46,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-18 12:02:46,931 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:02:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-11-18 12:02:54,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:02:54,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51] total 86 [2018-11-18 12:02:54,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-11-18 12:02:54,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-11-18 12:02:54,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2018-11-18 12:02:54,183 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 86 states. [2018-11-18 12:02:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:57,120 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2018-11-18 12:02:57,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-18 12:02:57,121 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 104 [2018-11-18 12:02:57,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:57,122 INFO L225 Difference]: With dead ends: 73 [2018-11-18 12:02:57,122 INFO L226 Difference]: Without dead ends: 67 [2018-11-18 12:02:57,123 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2018-11-18 12:02:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-18 12:02:57,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-11-18 12:02:57,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-18 12:02:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-11-18 12:02:57,128 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 104 [2018-11-18 12:02:57,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:57,128 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-11-18 12:02:57,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-11-18 12:02:57,128 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-11-18 12:02:57,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-11-18 12:02:57,129 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:57,129 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:57,129 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:02:57,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:57,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1262227017, now seen corresponding path program 9 times [2018-11-18 12:02:57,130 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:02:57,130 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:02:57,142 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-18 12:02:57,644 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-11-18 12:02:57,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:02:57,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-18 12:02:58,339 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:03:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-18 12:03:08,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:03:08,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57] total 96 [2018-11-18 12:03:08,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-11-18 12:03:08,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-11-18 12:03:08,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=8773, Unknown=0, NotChecked=0, Total=9120 [2018-11-18 12:03:08,277 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 96 states. [2018-11-18 12:03:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:03:11,676 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-11-18 12:03:11,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-18 12:03:11,676 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 116 [2018-11-18 12:03:11,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:03:11,677 INFO L225 Difference]: With dead ends: 79 [2018-11-18 12:03:11,677 INFO L226 Difference]: Without dead ends: 73 [2018-11-18 12:03:11,678 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1274, Invalid=16816, Unknown=0, NotChecked=0, Total=18090 [2018-11-18 12:03:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-11-18 12:03:11,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-11-18 12:03:11,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-18 12:03:11,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-11-18 12:03:11,682 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 116 [2018-11-18 12:03:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:03:11,683 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-11-18 12:03:11,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-11-18 12:03:11,683 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-11-18 12:03:11,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-11-18 12:03:11,686 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:03:11,686 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:03:11,686 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:03:11,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:03:11,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1835458231, now seen corresponding path program 10 times [2018-11-18 12:03:11,687 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:03:11,687 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:03:11,699 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:03:11,758 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:03:11,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:03:11,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:03:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-18 12:03:12,621 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:03:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-11-18 12:03:24,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:03:24,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 63] total 106 [2018-11-18 12:03:24,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-11-18 12:03:24,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-11-18 12:03:24,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=10745, Unknown=0, NotChecked=0, Total=11130 [2018-11-18 12:03:24,081 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 106 states. [2018-11-18 12:03:28,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:03:28,105 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2018-11-18 12:03:28,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-18 12:03:28,106 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 128 [2018-11-18 12:03:28,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:03:28,107 INFO L225 Difference]: With dead ends: 85 [2018-11-18 12:03:28,107 INFO L226 Difference]: Without dead ends: 79 [2018-11-18 12:03:28,108 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 148 SyntacticMatches, 3 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1494, Invalid=20558, Unknown=0, NotChecked=0, Total=22052 [2018-11-18 12:03:28,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-11-18 12:03:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-11-18 12:03:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-18 12:03:28,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-11-18 12:03:28,113 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 128 [2018-11-18 12:03:28,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:03:28,113 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-11-18 12:03:28,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-11-18 12:03:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-11-18 12:03:28,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-11-18 12:03:28,114 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:03:28,115 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:03:28,115 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:03:28,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:03:28,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2110448713, now seen corresponding path program 11 times [2018-11-18 12:03:28,115 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:03:28,115 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:03:28,142 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-11-18 12:03:28,868 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-11-18 12:03:28,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:03:28,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:03:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-18 12:03:29,876 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:03:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-11-18 12:03:43,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:03:43,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 69] total 116 [2018-11-18 12:03:43,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-11-18 12:03:43,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-11-18 12:03:43,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=12917, Unknown=0, NotChecked=0, Total=13340 [2018-11-18 12:03:43,583 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 116 states. [2018-11-18 12:03:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:03:48,249 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-11-18 12:03:48,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-11-18 12:03:48,250 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 140 [2018-11-18 12:03:48,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:03:48,250 INFO L225 Difference]: With dead ends: 91 [2018-11-18 12:03:48,250 INFO L226 Difference]: Without dead ends: 85 [2018-11-18 12:03:48,251 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1730, Invalid=24676, Unknown=0, NotChecked=0, Total=26406 [2018-11-18 12:03:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-11-18 12:03:48,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-11-18 12:03:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-18 12:03:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-11-18 12:03:48,257 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 140 [2018-11-18 12:03:48,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:03:48,257 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-11-18 12:03:48,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-11-18 12:03:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-11-18 12:03:48,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-11-18 12:03:48,258 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:03:48,258 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:03:48,259 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:03:48,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:03:48,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1482336439, now seen corresponding path program 12 times [2018-11-18 12:03:48,259 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:03:48,259 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:03:48,276 INFO L101 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2018-11-18 12:03:49,248 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-11-18 12:03:49,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:03:49,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:03:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-18 12:03:50,422 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:04:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2018-11-18 12:04:06,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:04:06,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 75] total 126 [2018-11-18 12:04:06,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-11-18 12:04:06,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-11-18 12:04:06,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=15289, Unknown=0, NotChecked=0, Total=15750 [2018-11-18 12:04:06,741 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 126 states. [2018-11-18 12:04:12,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:04:12,302 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2018-11-18 12:04:12,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-11-18 12:04:12,303 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 152 [2018-11-18 12:04:12,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:04:12,304 INFO L225 Difference]: With dead ends: 97 [2018-11-18 12:04:12,304 INFO L226 Difference]: Without dead ends: 91 [2018-11-18 12:04:12,305 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4102 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1982, Invalid=29170, Unknown=0, NotChecked=0, Total=31152 [2018-11-18 12:04:12,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-11-18 12:04:12,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-11-18 12:04:12,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-11-18 12:04:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-11-18 12:04:12,308 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 152 [2018-11-18 12:04:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:04:12,309 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-11-18 12:04:12,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-11-18 12:04:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-11-18 12:04:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-11-18 12:04:12,310 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:04:12,310 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:04:12,310 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:04:12,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:04:12,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1476164169, now seen corresponding path program 13 times [2018-11-18 12:04:12,310 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:04:12,311 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:04:12,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:04:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:04:12,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:04:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-11-18 12:04:13,701 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:04:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-11-18 12:04:32,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:04:32,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 81] total 136 [2018-11-18 12:04:32,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-11-18 12:04:32,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-11-18 12:04:32,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=17861, Unknown=0, NotChecked=0, Total=18360 [2018-11-18 12:04:32,506 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 136 states. [2018-11-18 12:04:38,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:04:38,409 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2018-11-18 12:04:38,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-11-18 12:04:38,410 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 164 [2018-11-18 12:04:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:04:38,411 INFO L225 Difference]: With dead ends: 103 [2018-11-18 12:04:38,411 INFO L226 Difference]: Without dead ends: 97 [2018-11-18 12:04:38,412 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4781 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=2250, Invalid=34040, Unknown=0, NotChecked=0, Total=36290 [2018-11-18 12:04:38,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-11-18 12:04:38,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-11-18 12:04:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-18 12:04:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-11-18 12:04:38,416 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 164 [2018-11-18 12:04:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:04:38,417 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-11-18 12:04:38,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-11-18 12:04:38,417 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-11-18 12:04:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-11-18 12:04:38,418 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:04:38,418 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:04:38,418 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:04:38,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:04:38,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1012642487, now seen corresponding path program 14 times [2018-11-18 12:04:38,419 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:04:38,419 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:04:38,432 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-18 12:04:38,516 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:04:38,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:04:38,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:04:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-11-18 12:04:40,042 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:05:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2018-11-18 12:05:02,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:05:02,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 87] total 146 [2018-11-18 12:05:02,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-11-18 12:05:02,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-11-18 12:05:02,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=20633, Unknown=0, NotChecked=0, Total=21170 [2018-11-18 12:05:02,045 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 146 states. [2018-11-18 12:05:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:05:08,813 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2018-11-18 12:05:08,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-11-18 12:05:08,814 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 176 [2018-11-18 12:05:08,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:05:08,815 INFO L225 Difference]: With dead ends: 109 [2018-11-18 12:05:08,815 INFO L226 Difference]: Without dead ends: 103 [2018-11-18 12:05:08,817 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 204 SyntacticMatches, 3 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=2534, Invalid=39286, Unknown=0, NotChecked=0, Total=41820 [2018-11-18 12:05:08,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-18 12:05:08,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-11-18 12:05:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-11-18 12:05:08,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-11-18 12:05:08,822 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 176 [2018-11-18 12:05:08,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:05:08,823 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-11-18 12:05:08,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-11-18 12:05:08,823 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-11-18 12:05:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-11-18 12:05:08,824 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:05:08,824 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:05:08,824 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:05:08,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:05:08,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1282461769, now seen corresponding path program 15 times [2018-11-18 12:05:08,825 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:05:08,825 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:05:08,843 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-18 12:05:10,522 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-11-18 12:05:10,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:05:10,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:05:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-11-18 12:05:12,257 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:05:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2018-11-18 12:05:37,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:05:37,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 93] total 156 [2018-11-18 12:05:37,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-11-18 12:05:37,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-11-18 12:05:37,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=23605, Unknown=0, NotChecked=0, Total=24180 [2018-11-18 12:05:37,466 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 156 states. [2018-11-18 12:05:45,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:05:45,314 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-11-18 12:05:45,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-11-18 12:05:45,315 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 188 [2018-11-18 12:05:45,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:05:45,316 INFO L225 Difference]: With dead ends: 115 [2018-11-18 12:05:45,316 INFO L226 Difference]: Without dead ends: 109 [2018-11-18 12:05:45,318 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 218 SyntacticMatches, 3 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6295 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=2834, Invalid=44908, Unknown=0, NotChecked=0, Total=47742 [2018-11-18 12:05:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-11-18 12:05:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-11-18 12:05:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-18 12:05:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-11-18 12:05:45,323 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 188 [2018-11-18 12:05:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:05:45,324 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-11-18 12:05:45,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-11-18 12:05:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-11-18 12:05:45,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-11-18 12:05:45,325 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:05:45,325 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:05:45,326 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:05:45,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:05:45,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1053424823, now seen corresponding path program 16 times [2018-11-18 12:05:45,326 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 12:05:45,326 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 12:05:45,340 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:05:45,566 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:05:45,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2018-11-18 12:05:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 12:05:45,821 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 12:05:45,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 12:05:45 BoogieIcfgContainer [2018-11-18 12:05:45,857 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 12:05:45,857 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 12:05:45,857 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 12:05:45,857 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 12:05:45,858 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:02:15" (3/4) ... [2018-11-18 12:05:45,860 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 12:05:45,913 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_bc072343-1f87-4c0d-baac-73049b9745af/bin-2019/uautomizer/witness.graphml [2018-11-18 12:05:45,914 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 12:05:45,914 INFO L168 Benchmark]: Toolchain (without parser) took 210580.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.7 MB). Free memory was 949.7 MB in the beginning and 814.4 MB in the end (delta: 135.4 MB). Peak memory consumption was 312.1 MB. Max. memory is 11.5 GB. [2018-11-18 12:05:45,915 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:05:45,916 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.99 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 939.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:05:45,916 INFO L168 Benchmark]: Boogie Preprocessor took 18.96 ms. Allocated memory is still 1.0 GB. Free memory was 939.0 MB in the beginning and 933.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 12:05:45,916 INFO L168 Benchmark]: RCFGBuilder took 179.67 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -157.8 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. [2018-11-18 12:05:45,918 INFO L168 Benchmark]: TraceAbstraction took 210143.54 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 69.7 MB). Free memory was 1.1 GB in the beginning and 814.4 MB in the end (delta: 277.0 MB). Peak memory consumption was 346.8 MB. Max. memory is 11.5 GB. [2018-11-18 12:05:45,919 INFO L168 Benchmark]: Witness Printer took 56.49 ms. Allocated memory is still 1.2 GB. Free memory was 814.4 MB in the beginning and 814.4 MB in the end (delta: 2.8 kB). Peak memory consumption was 2.8 kB. Max. memory is 11.5 GB. [2018-11-18 12:05:45,920 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 178.99 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 939.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.96 ms. Allocated memory is still 1.0 GB. Free memory was 939.0 MB in the beginning and 933.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 179.67 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -157.8 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 210143.54 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 69.7 MB). Free memory was 1.1 GB in the beginning and 814.4 MB in the end (delta: 277.0 MB). Peak memory consumption was 346.8 MB. Max. memory is 11.5 GB. * Witness Printer took 56.49 ms. Allocated memory is still 1.2 GB. Free memory was 814.4 MB in the beginning and 814.4 MB in the end (delta: 2.8 kB). Peak memory consumption was 2.8 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 34]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L25] int n = __VERIFIER_nondet_int(); [L26] COND FALSE !(n < 1) VAL [n=32] [L29] CALL, EXPR hanoi(n) VAL [\old(n)=32] [L17] COND FALSE !(n == 1) VAL [\old(n)=32, n=32] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=31] [L17] COND FALSE !(n == 1) VAL [\old(n)=31, n=31] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=30] [L17] COND FALSE !(n == 1) VAL [\old(n)=30, n=30] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=29] [L17] COND FALSE !(n == 1) VAL [\old(n)=29, n=29] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=28] [L17] COND FALSE !(n == 1) VAL [\old(n)=28, n=28] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=27] [L17] COND FALSE !(n == 1) VAL [\old(n)=27, n=27] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=26] [L17] COND FALSE !(n == 1) VAL [\old(n)=26, n=26] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=25] [L17] COND FALSE !(n == 1) VAL [\old(n)=25, n=25] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=24] [L17] COND FALSE !(n == 1) VAL [\old(n)=24, n=24] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=23] [L17] COND FALSE !(n == 1) VAL [\old(n)=23, n=23] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=22] [L17] COND FALSE !(n == 1) VAL [\old(n)=22, n=22] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=21] [L17] COND FALSE !(n == 1) VAL [\old(n)=21, n=21] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=20] [L17] COND FALSE !(n == 1) VAL [\old(n)=20, n=20] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=19] [L17] COND FALSE !(n == 1) VAL [\old(n)=19, n=19] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=18] [L17] COND FALSE !(n == 1) VAL [\old(n)=18, n=18] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=17] [L17] COND FALSE !(n == 1) VAL [\old(n)=17, n=17] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=16] [L17] COND FALSE !(n == 1) VAL [\old(n)=16, n=16] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=15] [L17] COND FALSE !(n == 1) VAL [\old(n)=15, n=15] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=14] [L17] COND FALSE !(n == 1) VAL [\old(n)=14, n=14] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=13] [L17] COND FALSE !(n == 1) VAL [\old(n)=13, n=13] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=12] [L17] COND FALSE !(n == 1) VAL [\old(n)=12, n=12] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=11] [L17] COND FALSE !(n == 1) VAL [\old(n)=11, n=11] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=10] [L17] COND FALSE !(n == 1) VAL [\old(n)=10, n=10] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=9] [L17] COND FALSE !(n == 1) VAL [\old(n)=9, n=9] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=8] [L17] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=7] [L17] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=6] [L17] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=5] [L17] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=4] [L17] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=3] [L17] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=1] [L17] COND TRUE n == 1 [L18] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L20] EXPR hanoi(n-1) VAL [\old(n)=2, hanoi(n-1)=1, n=2] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=3, hanoi(n-1)=3, n=3] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=4, hanoi(n-1)=7, n=4] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=5, hanoi(n-1)=15, n=5] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=6, hanoi(n-1)=31, n=6] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=7, hanoi(n-1)=63, n=7] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=8, hanoi(n-1)=127, n=8] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=9, hanoi(n-1)=255, n=9] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=10, hanoi(n-1)=511, n=10] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=11, hanoi(n-1)=1023, n=11] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=12, hanoi(n-1)=2047, n=12] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=13, hanoi(n-1)=4095, n=13] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=14, hanoi(n-1)=8191, n=14] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=15, hanoi(n-1)=16383, n=15] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=16, hanoi(n-1)=32767, n=16] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=17, hanoi(n-1)=65535, n=17] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=18, hanoi(n-1)=131071, n=18] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=19, hanoi(n-1)=262143, n=19] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=20, hanoi(n-1)=524287, n=20] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=21, hanoi(n-1)=1048575, n=21] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=22, hanoi(n-1)=2097151, n=22] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=23, hanoi(n-1)=4194303, n=23] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=24, hanoi(n-1)=8388607, n=24] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=25, hanoi(n-1)=16777215, n=25] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=26, hanoi(n-1)=33554431, n=26] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=27, hanoi(n-1)=67108863, n=27] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=28, hanoi(n-1)=134217727, n=28] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=29, hanoi(n-1)=268435455, n=29] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=30, hanoi(n-1)=536870911, n=30] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=31, hanoi(n-1)=1073741823, n=31] [L20] RET return 2 * (hanoi(n-1)) + 1; [L20] EXPR hanoi(n-1) VAL [\old(n)=32, hanoi(n-1)=2147483647, n=32] [L20] RET return 2 * (hanoi(n-1)) + 1; [L29] EXPR hanoi(n) VAL [hanoi(n)=-1, n=32] [L29] unsigned result = hanoi(n); [L31] COND FALSE !(result+1>0 && result+1 == 1<