./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/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 dc393f6c4862d8369d85fc8f5aceb831c4046350 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/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 dc393f6c4862d8369d85fc8f5aceb831c4046350 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:01:36,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:01:36,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:01:36,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:01:36,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:01:36,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:01:36,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:01:36,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:01:36,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:01:36,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:01:36,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:01:36,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:01:36,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:01:36,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:01:36,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:01:36,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:01:36,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:01:36,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:01:36,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:01:36,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:01:36,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:01:36,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:01:36,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:01:36,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:01:36,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:01:36,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:01:36,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:01:36,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:01:36,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:01:36,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:01:36,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:01:36,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:01:36,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:01:36,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:01:36,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:01:36,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:01:36,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:01:36,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:01:36,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:01:36,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:01:36,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:01:36,459 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 09:01:36,469 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:01:36,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:01:36,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:01:36,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:01:36,471 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:01:36,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:01:36,471 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:01:36,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:01:36,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:01:36,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:01:36,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:01:36,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:01:36,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:01:36,474 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:01:36,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:01:36,474 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:01:36,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:01:36,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:01:36,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:01:36,475 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:01:36,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:01:36,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:01:36,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:01:36,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:01:36,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:01:36,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:01:36,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:01:36,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:01:36,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_200eb074-5acb-499d-a485-a70eeddd9878/bin/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 -> dc393f6c4862d8369d85fc8f5aceb831c4046350 [2019-10-22 09:01:36,521 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:01:36,541 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:01:36,545 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:01:36,546 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:01:36,546 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:01:36,547 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2019-10-22 09:01:36,599 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/data/e1ea49064/0aadfce596964192939d5e76af50ec23/FLAGeb048b350 [2019-10-22 09:01:36,997 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:01:36,998 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/sv-benchmarks/c/bitvector/num_conversion_1.c [2019-10-22 09:01:37,007 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/data/e1ea49064/0aadfce596964192939d5e76af50ec23/FLAGeb048b350 [2019-10-22 09:01:37,021 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/data/e1ea49064/0aadfce596964192939d5e76af50ec23 [2019-10-22 09:01:37,025 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:01:37,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:01:37,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:37,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:01:37,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:01:37,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:37" (1/1) ... [2019-10-22 09:01:37,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2244ea45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:37, skipping insertion in model container [2019-10-22 09:01:37,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:37" (1/1) ... [2019-10-22 09:01:37,046 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:01:37,062 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:01:37,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:37,269 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:01:37,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:37,372 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:01:37,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:37 WrapperNode [2019-10-22 09:01:37,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:37,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:37,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:01:37,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:01:37,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:37" (1/1) ... [2019-10-22 09:01:37,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:37" (1/1) ... [2019-10-22 09:01:37,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:37,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:01:37,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:01:37,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:01:37,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:37" (1/1) ... [2019-10-22 09:01:37,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:37" (1/1) ... [2019-10-22 09:01:37,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:37" (1/1) ... [2019-10-22 09:01:37,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:37" (1/1) ... [2019-10-22 09:01:37,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:37" (1/1) ... [2019-10-22 09:01:37,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:37" (1/1) ... [2019-10-22 09:01:37,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:37" (1/1) ... [2019-10-22 09:01:37,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:01:37,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:01:37,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:01:37,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:01:37,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/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 [2019-10-22 09:01:37,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:01:37,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:01:37,662 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:01:37,662 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 09:01:37,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:37 BoogieIcfgContainer [2019-10-22 09:01:37,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:01:37,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:01:37,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:01:37,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:01:37,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:01:37" (1/3) ... [2019-10-22 09:01:37,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ca6267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:37, skipping insertion in model container [2019-10-22 09:01:37,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:37" (2/3) ... [2019-10-22 09:01:37,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ca6267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:37, skipping insertion in model container [2019-10-22 09:01:37,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:37" (3/3) ... [2019-10-22 09:01:37,672 INFO L109 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2019-10-22 09:01:37,682 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:01:37,690 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:01:37,701 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:01:37,726 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:01:37,726 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:01:37,726 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:01:37,726 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:01:37,726 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:01:37,727 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:01:37,727 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:01:37,727 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:01:37,743 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-10-22 09:01:37,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 09:01:37,749 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:37,750 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 09:01:37,752 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash 30139652, now seen corresponding path program 1 times [2019-10-22 09:01:37,768 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:37,769 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969417732] [2019-10-22 09:01:37,769 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:37,769 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:37,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:37,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969417732] [2019-10-22 09:01:37,852 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:37,852 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 09:01:37,852 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789877609] [2019-10-22 09:01:37,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 09:01:37,857 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:37,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 09:01:37,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 09:01:37,869 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-10-22 09:01:37,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:37,882 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2019-10-22 09:01:37,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 09:01:37,883 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-10-22 09:01:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:37,891 INFO L225 Difference]: With dead ends: 20 [2019-10-22 09:01:37,891 INFO L226 Difference]: Without dead ends: 8 [2019-10-22 09:01:37,894 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 09:01:37,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-10-22 09:01:37,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 09:01:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 09:01:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-10-22 09:01:37,926 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-10-22 09:01:37,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:37,926 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-10-22 09:01:37,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 09:01:37,927 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-10-22 09:01:37,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 09:01:37,927 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:37,927 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 09:01:37,929 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:37,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:37,930 INFO L82 PathProgramCache]: Analyzing trace with hash 29811951, now seen corresponding path program 1 times [2019-10-22 09:01:37,930 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:37,930 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751440632] [2019-10-22 09:01:37,930 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:37,931 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:37,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:37,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751440632] [2019-10-22 09:01:37,996 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:37,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 09:01:37,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201338943] [2019-10-22 09:01:37,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 09:01:37,998 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:37,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 09:01:37,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:01:37,999 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2019-10-22 09:01:38,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:38,015 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-10-22 09:01:38,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 09:01:38,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-10-22 09:01:38,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:38,016 INFO L225 Difference]: With dead ends: 15 [2019-10-22 09:01:38,017 INFO L226 Difference]: Without dead ends: 11 [2019-10-22 09:01:38,017 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:01:38,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-10-22 09:01:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2019-10-22 09:01:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-10-22 09:01:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-10-22 09:01:38,020 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-10-22 09:01:38,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:38,020 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-10-22 09:01:38,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 09:01:38,021 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-10-22 09:01:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 09:01:38,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:38,021 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:38,021 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:38,022 INFO L82 PathProgramCache]: Analyzing trace with hash 608596189, now seen corresponding path program 1 times [2019-10-22 09:01:38,022 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:38,022 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924800946] [2019-10-22 09:01:38,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:38,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:38,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:38,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924800946] [2019-10-22 09:01:38,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948719510] [2019-10-22 09:01:38,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:01:38,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:38,228 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:38,228 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-10-22 09:01:38,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205542575] [2019-10-22 09:01:38,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:38,229 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:38,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:38,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:38,230 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2019-10-22 09:01:38,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:38,259 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-10-22 09:01:38,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:01:38,260 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-10-22 09:01:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:38,261 INFO L225 Difference]: With dead ends: 18 [2019-10-22 09:01:38,261 INFO L226 Difference]: Without dead ends: 14 [2019-10-22 09:01:38,261 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-22 09:01:38,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2019-10-22 09:01:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-22 09:01:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-10-22 09:01:38,266 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2019-10-22 09:01:38,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:38,267 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-10-22 09:01:38,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-10-22 09:01:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 09:01:38,267 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:38,268 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2019-10-22 09:01:38,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:38,469 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:38,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1123862993, now seen corresponding path program 2 times [2019-10-22 09:01:38,470 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:38,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245665939] [2019-10-22 09:01:38,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:38,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:38,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:38,565 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245665939] [2019-10-22 09:01:38,565 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257155499] [2019-10-22 09:01:38,565 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:38,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:38,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:38,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:01:38,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:38,638 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:38,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-10-22 09:01:38,638 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431412268] [2019-10-22 09:01:38,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:01:38,639 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:38,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:01:38,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:38,639 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2019-10-22 09:01:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:38,700 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2019-10-22 09:01:38,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:01:38,702 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-10-22 09:01:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:38,703 INFO L225 Difference]: With dead ends: 21 [2019-10-22 09:01:38,703 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 09:01:38,704 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:38,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 09:01:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2019-10-22 09:01:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-22 09:01:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-10-22 09:01:38,710 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2019-10-22 09:01:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:38,710 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-10-22 09:01:38,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:01:38,711 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-10-22 09:01:38,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 09:01:38,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:38,711 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2019-10-22 09:01:38,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:38,912 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:38,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:38,912 INFO L82 PathProgramCache]: Analyzing trace with hash -193357923, now seen corresponding path program 3 times [2019-10-22 09:01:38,913 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:38,913 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411658891] [2019-10-22 09:01:38,913 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:38,913 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:38,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:38,988 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411658891] [2019-10-22 09:01:38,988 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881567768] [2019-10-22 09:01:38,988 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:39,027 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 09:01:39,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:39,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 09:01:39,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:39,095 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:39,095 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-10-22 09:01:39,095 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312590402] [2019-10-22 09:01:39,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:01:39,096 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:39,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:01:39,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:39,097 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 9 states. [2019-10-22 09:01:39,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:39,156 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2019-10-22 09:01:39,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:39,157 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-10-22 09:01:39,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:39,157 INFO L225 Difference]: With dead ends: 24 [2019-10-22 09:01:39,157 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 09:01:39,158 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 09:01:39,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-10-22 09:01:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-22 09:01:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-10-22 09:01:39,162 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 14 [2019-10-22 09:01:39,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:39,162 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-10-22 09:01:39,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:01:39,162 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-10-22 09:01:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 09:01:39,163 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:39,163 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2019-10-22 09:01:39,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:39,363 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:39,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:39,364 INFO L82 PathProgramCache]: Analyzing trace with hash 764254063, now seen corresponding path program 4 times [2019-10-22 09:01:39,364 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:39,364 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989791587] [2019-10-22 09:01:39,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:39,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:39,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:39,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989791587] [2019-10-22 09:01:39,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814361599] [2019-10-22 09:01:39,491 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:39,529 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:39,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:39,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 09:01:39,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:39,628 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:39,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-10-22 09:01:39,628 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989377251] [2019-10-22 09:01:39,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 09:01:39,629 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:39,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 09:01:39,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:01:39,629 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 11 states. [2019-10-22 09:01:39,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:39,741 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2019-10-22 09:01:39,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:39,742 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2019-10-22 09:01:39,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:39,743 INFO L225 Difference]: With dead ends: 27 [2019-10-22 09:01:39,743 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 09:01:39,743 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:01:39,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 09:01:39,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-10-22 09:01:39,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-22 09:01:39,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2019-10-22 09:01:39,748 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 17 [2019-10-22 09:01:39,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:39,748 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2019-10-22 09:01:39,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 09:01:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2019-10-22 09:01:39,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-22 09:01:39,749 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:39,749 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1] [2019-10-22 09:01:39,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:39,950 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:39,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:39,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1810148957, now seen corresponding path program 5 times [2019-10-22 09:01:39,951 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:39,951 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686995148] [2019-10-22 09:01:39,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:39,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:39,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:40,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686995148] [2019-10-22 09:01:40,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042111615] [2019-10-22 09:01:40,068 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:40,103 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-22 09:01:40,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:40,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-22 09:01:40,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:40,247 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:40,247 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-10-22 09:01:40,247 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923022231] [2019-10-22 09:01:40,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 09:01:40,248 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:40,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 09:01:40,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:01:40,248 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 13 states. [2019-10-22 09:01:40,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:40,358 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2019-10-22 09:01:40,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 09:01:40,359 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-10-22 09:01:40,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:40,359 INFO L225 Difference]: With dead ends: 30 [2019-10-22 09:01:40,360 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 09:01:40,360 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:01:40,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 09:01:40,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-22 09:01:40,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 09:01:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-10-22 09:01:40,365 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 20 [2019-10-22 09:01:40,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:40,366 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-10-22 09:01:40,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 09:01:40,366 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-10-22 09:01:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 09:01:40,367 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:40,367 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1] [2019-10-22 09:01:40,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:40,568 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:40,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:40,568 INFO L82 PathProgramCache]: Analyzing trace with hash 77203631, now seen corresponding path program 6 times [2019-10-22 09:01:40,568 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:40,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180059789] [2019-10-22 09:01:40,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:40,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:40,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:40,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180059789] [2019-10-22 09:01:40,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255646632] [2019-10-22 09:01:40,713 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:40,774 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-22 09:01:40,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:40,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-22 09:01:40,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:41,002 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:41,002 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-10-22 09:01:41,002 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491135977] [2019-10-22 09:01:41,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 09:01:41,003 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:41,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 09:01:41,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:01:41,003 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 15 states. [2019-10-22 09:01:41,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:41,156 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-10-22 09:01:41,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:01:41,156 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2019-10-22 09:01:41,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:41,157 INFO L225 Difference]: With dead ends: 33 [2019-10-22 09:01:41,157 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 09:01:41,158 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:01:41,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 09:01:41,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-10-22 09:01:41,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-22 09:01:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2019-10-22 09:01:41,166 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 23 [2019-10-22 09:01:41,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:41,166 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2019-10-22 09:01:41,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 09:01:41,166 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2019-10-22 09:01:41,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-22 09:01:41,167 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:41,167 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1] [2019-10-22 09:01:41,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:41,368 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:41,368 INFO L82 PathProgramCache]: Analyzing trace with hash -590105315, now seen corresponding path program 7 times [2019-10-22 09:01:41,369 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:41,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540595087] [2019-10-22 09:01:41,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:41,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:41,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:41,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540595087] [2019-10-22 09:01:41,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117830617] [2019-10-22 09:01:41,506 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:41,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-22 09:01:41,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:41,724 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:41,724 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-10-22 09:01:41,724 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426393382] [2019-10-22 09:01:41,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-22 09:01:41,725 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:41,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-22 09:01:41,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:01:41,726 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 17 states. [2019-10-22 09:01:41,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:41,877 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2019-10-22 09:01:41,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 09:01:41,878 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2019-10-22 09:01:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:41,878 INFO L225 Difference]: With dead ends: 36 [2019-10-22 09:01:41,878 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 09:01:41,879 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:01:41,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 09:01:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-10-22 09:01:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-22 09:01:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-10-22 09:01:41,883 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 26 [2019-10-22 09:01:41,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:41,883 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-10-22 09:01:41,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-22 09:01:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-10-22 09:01:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-22 09:01:41,884 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:41,884 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1] [2019-10-22 09:01:42,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:42,085 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:42,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1012697583, now seen corresponding path program 8 times [2019-10-22 09:01:42,085 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:42,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866960682] [2019-10-22 09:01:42,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:42,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:42,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:42,142 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:42,142 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 09:01:42,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:01:42 BoogieIcfgContainer [2019-10-22 09:01:42,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:01:42,166 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:01:42,166 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:01:42,167 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:01:42,167 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:37" (3/4) ... [2019-10-22 09:01:42,171 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-10-22 09:01:42,173 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:01:42,175 INFO L168 Benchmark]: Toolchain (without parser) took 5148.51 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 230.2 MB). Free memory was 941.8 MB in the beginning and 1.2 GB in the end (delta: -262.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:42,176 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:42,177 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 941.8 MB in the beginning and 1.2 GB in the end (delta: -213.1 MB). Peak memory consumption was 21.6 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:42,178 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:42,179 INFO L168 Benchmark]: Boogie Preprocessor took 16.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:42,180 INFO L168 Benchmark]: RCFGBuilder took 242.36 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:42,182 INFO L168 Benchmark]: TraceAbstraction took 4501.81 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -80.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:42,182 INFO L168 Benchmark]: Witness Printer took 6.64 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:42,185 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 345.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 941.8 MB in the beginning and 1.2 GB in the end (delta: -213.1 MB). Peak memory consumption was 21.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 242.36 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4501.81 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -80.8 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 6.64 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 6]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 22, overapproximation of bitwiseAnd at line 23. Possible FailurePath: [L14] unsigned char x; [L15] unsigned char y; [L16] unsigned char c; [L18] x = 37 [L19] y = 0 [L20] c = 0 [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND FALSE !(c < (unsigned char)8) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Result: UNSAFE, OverallTime: 4.4s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 125 SDtfs, 136 SDslu, 565 SDs, 0 SdLazy, 585 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 81 SyntacticMatches, 13 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 16 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 277 NumberOfCodeBlocks, 277 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 232 ConstructedInterpolants, 70 QuantifiedInterpolants, 54320 SizeOfPredicates, 7 NumberOfNonLiveVariables, 280 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 0/392 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 09:01:44,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:01:44,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:01:44,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:01:44,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:01:44,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:01:44,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:01:44,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:01:44,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:01:44,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:01:44,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:01:44,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:01:44,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:01:44,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:01:44,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:01:44,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:01:44,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:01:44,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:01:44,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:01:44,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:01:44,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:01:44,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:01:44,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:01:44,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:01:44,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:01:44,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:01:44,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:01:44,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:01:44,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:01:44,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:01:44,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:01:44,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:01:44,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:01:44,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:01:44,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:01:44,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:01:44,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:01:44,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:01:44,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:01:44,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:01:44,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:01:44,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-10-22 09:01:44,282 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:01:44,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:01:44,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:01:44,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:01:44,284 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:01:44,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:01:44,287 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:01:44,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:01:44,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:01:44,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:01:44,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:01:44,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:01:44,289 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 09:01:44,289 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 09:01:44,289 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:01:44,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:01:44,289 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:01:44,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:01:44,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:01:44,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:01:44,290 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:01:44,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:01:44,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:01:44,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:01:44,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:01:44,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:01:44,290 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-10-22 09:01:44,291 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 09:01:44,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:01:44,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 09:01:44,291 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_200eb074-5acb-499d-a485-a70eeddd9878/bin/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 -> dc393f6c4862d8369d85fc8f5aceb831c4046350 [2019-10-22 09:01:44,326 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:01:44,337 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:01:44,342 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:01:44,343 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:01:44,344 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:01:44,344 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2019-10-22 09:01:44,394 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/data/da432b457/4251412ea780452e9ece35d3c7cad508/FLAG5e80b1ef7 [2019-10-22 09:01:44,785 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:01:44,785 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/sv-benchmarks/c/bitvector/num_conversion_1.c [2019-10-22 09:01:44,790 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/data/da432b457/4251412ea780452e9ece35d3c7cad508/FLAG5e80b1ef7 [2019-10-22 09:01:45,173 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/data/da432b457/4251412ea780452e9ece35d3c7cad508 [2019-10-22 09:01:45,176 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:01:45,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:01:45,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:45,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:01:45,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:01:45,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:45" (1/1) ... [2019-10-22 09:01:45,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c5b486e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:45, skipping insertion in model container [2019-10-22 09:01:45,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:45" (1/1) ... [2019-10-22 09:01:45,192 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:01:45,209 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:01:45,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:45,395 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:01:45,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:45,430 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:01:45,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:45 WrapperNode [2019-10-22 09:01:45,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:45,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:45,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:01:45,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:01:45,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:45" (1/1) ... [2019-10-22 09:01:45,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:45" (1/1) ... [2019-10-22 09:01:45,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:45,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:01:45,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:01:45,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:01:45,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:45" (1/1) ... [2019-10-22 09:01:45,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:45" (1/1) ... [2019-10-22 09:01:45,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:45" (1/1) ... [2019-10-22 09:01:45,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:45" (1/1) ... [2019-10-22 09:01:45,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:45" (1/1) ... [2019-10-22 09:01:45,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:45" (1/1) ... [2019-10-22 09:01:45,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:45" (1/1) ... [2019-10-22 09:01:45,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:01:45,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:01:45,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:01:45,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:01:45,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/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 [2019-10-22 09:01:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:01:45,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:01:45,773 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:01:45,773 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 09:01:45,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:45 BoogieIcfgContainer [2019-10-22 09:01:45,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:01:45,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:01:45,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:01:45,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:01:45,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:01:45" (1/3) ... [2019-10-22 09:01:45,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dcc8f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:45, skipping insertion in model container [2019-10-22 09:01:45,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:45" (2/3) ... [2019-10-22 09:01:45,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dcc8f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:45, skipping insertion in model container [2019-10-22 09:01:45,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:45" (3/3) ... [2019-10-22 09:01:45,782 INFO L109 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2019-10-22 09:01:45,791 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:01:45,798 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:01:45,805 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:01:45,825 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:01:45,825 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:01:45,825 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:01:45,825 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:01:45,825 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:01:45,826 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:01:45,826 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:01:45,826 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:01:45,837 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-10-22 09:01:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 09:01:45,842 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:45,843 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 09:01:45,845 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:45,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:45,849 INFO L82 PathProgramCache]: Analyzing trace with hash 30139652, now seen corresponding path program 1 times [2019-10-22 09:01:45,858 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:45,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1946377958] [2019-10-22 09:01:45,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:45,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 09:01:45,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:45,939 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 09:01:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:45,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1946377958] [2019-10-22 09:01:45,943 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:45,944 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 09:01:45,944 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748735859] [2019-10-22 09:01:45,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 09:01:45,949 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 09:01:45,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 09:01:45,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 09:01:45,965 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-10-22 09:01:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:45,983 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2019-10-22 09:01:45,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 09:01:45,985 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-10-22 09:01:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:45,994 INFO L225 Difference]: With dead ends: 20 [2019-10-22 09:01:45,994 INFO L226 Difference]: Without dead ends: 8 [2019-10-22 09:01:45,997 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 09:01:46,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-10-22 09:01:46,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 09:01:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 09:01:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-10-22 09:01:46,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-10-22 09:01:46,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:46,027 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-10-22 09:01:46,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 09:01:46,027 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-10-22 09:01:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 09:01:46,027 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:46,028 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 09:01:46,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:46,229 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:46,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:46,229 INFO L82 PathProgramCache]: Analyzing trace with hash 29811951, now seen corresponding path program 1 times [2019-10-22 09:01:46,229 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:46,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2087557782] [2019-10-22 09:01:46,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:46,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:01:46,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:46,279 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 09:01:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:46,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2087557782] [2019-10-22 09:01:46,287 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:46,287 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-10-22 09:01:46,287 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146704187] [2019-10-22 09:01:46,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:01:46,289 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 09:01:46,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:01:46,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:46,289 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-10-22 09:01:46,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:46,321 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2019-10-22 09:01:46,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:01:46,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-10-22 09:01:46,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:46,323 INFO L225 Difference]: With dead ends: 16 [2019-10-22 09:01:46,323 INFO L226 Difference]: Without dead ends: 12 [2019-10-22 09:01:46,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:01:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-22 09:01:46,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-22 09:01:46,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-22 09:01:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-10-22 09:01:46,327 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2019-10-22 09:01:46,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:46,327 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-10-22 09:01:46,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:01:46,327 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-10-22 09:01:46,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 09:01:46,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:46,328 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2019-10-22 09:01:46,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:46,529 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:46,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:46,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1123862993, now seen corresponding path program 1 times [2019-10-22 09:01:46,530 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:46,530 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [773396860] [2019-10-22 09:01:46,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:46,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:01:46,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:46,623 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 09:01:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:46,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [773396860] [2019-10-22 09:01:46,663 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:46,663 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-10-22 09:01:46,663 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370868410] [2019-10-22 09:01:46,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:01:46,664 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 09:01:46,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:01:46,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:46,665 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2019-10-22 09:01:46,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:46,841 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2019-10-22 09:01:46,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 09:01:46,842 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-10-22 09:01:46,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:46,843 INFO L225 Difference]: With dead ends: 41 [2019-10-22 09:01:46,843 INFO L226 Difference]: Without dead ends: 34 [2019-10-22 09:01:46,844 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:01:46,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-22 09:01:46,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 19. [2019-10-22 09:01:46,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 09:01:46,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-10-22 09:01:46,853 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2019-10-22 09:01:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:46,853 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-10-22 09:01:46,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:01:46,854 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-10-22 09:01:46,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 09:01:46,854 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:46,854 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:47,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:47,055 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:47,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:47,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1066604691, now seen corresponding path program 1 times [2019-10-22 09:01:47,056 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:47,056 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1516447417] [2019-10-22 09:01:47,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:47,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 09:01:47,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:47,121 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 09:01:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:47,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1516447417] [2019-10-22 09:01:47,165 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:47,165 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2019-10-22 09:01:47,165 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478741694] [2019-10-22 09:01:47,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 09:01:47,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 09:01:47,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 09:01:47,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:01:47,166 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 8 states. [2019-10-22 09:01:47,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:47,276 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2019-10-22 09:01:47,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 09:01:47,277 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-10-22 09:01:47,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:47,277 INFO L225 Difference]: With dead ends: 28 [2019-10-22 09:01:47,277 INFO L226 Difference]: Without dead ends: 24 [2019-10-22 09:01:47,278 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:01:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-22 09:01:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-22 09:01:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 09:01:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-10-22 09:01:47,286 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2019-10-22 09:01:47,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:47,286 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-10-22 09:01:47,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 09:01:47,287 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-10-22 09:01:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 09:01:47,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:47,287 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1] [2019-10-22 09:01:47,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:47,488 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:47,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:47,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1658775637, now seen corresponding path program 2 times [2019-10-22 09:01:47,489 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:47,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1181872472] [2019-10-22 09:01:47,489 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:47,553 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:47,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:47,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 09:01:47,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:01:47,647 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 09:01:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:01:47,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1181872472] [2019-10-22 09:01:47,792 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:47,792 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-10-22 09:01:47,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518246360] [2019-10-22 09:01:47,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 09:01:47,793 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 09:01:47,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 09:01:47,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:01:47,794 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 13 states. [2019-10-22 09:01:48,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:48,294 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2019-10-22 09:01:48,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-22 09:01:48,295 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2019-10-22 09:01:48,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:48,296 INFO L225 Difference]: With dead ends: 75 [2019-10-22 09:01:48,296 INFO L226 Difference]: Without dead ends: 66 [2019-10-22 09:01:48,297 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2019-10-22 09:01:48,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-22 09:01:48,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 37. [2019-10-22 09:01:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-22 09:01:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-10-22 09:01:48,308 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 23 [2019-10-22 09:01:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:48,308 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-10-22 09:01:48,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 09:01:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-10-22 09:01:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 09:01:48,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:48,309 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1] [2019-10-22 09:01:48,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:48,510 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:48,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:48,511 INFO L82 PathProgramCache]: Analyzing trace with hash -978717267, now seen corresponding path program 3 times [2019-10-22 09:01:48,511 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:48,511 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [602149714] [2019-10-22 09:01:48,511 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:48,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-22 09:01:48,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:48,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:01:48,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-22 09:01:48,638 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 09:01:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-22 09:01:48,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [602149714] [2019-10-22 09:01:48,729 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:48,730 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-10-22 09:01:48,730 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611375241] [2019-10-22 09:01:48,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 09:01:48,730 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 09:01:48,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 09:01:48,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:01:48,731 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 10 states. [2019-10-22 09:01:48,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:48,937 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2019-10-22 09:01:48,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:01:48,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-10-22 09:01:48,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:48,940 INFO L225 Difference]: With dead ends: 86 [2019-10-22 09:01:48,940 INFO L226 Difference]: Without dead ends: 52 [2019-10-22 09:01:48,941 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:01:48,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-22 09:01:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2019-10-22 09:01:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-22 09:01:48,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2019-10-22 09:01:48,951 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 23 [2019-10-22 09:01:48,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:48,952 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2019-10-22 09:01:48,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 09:01:48,956 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2019-10-22 09:01:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 09:01:48,957 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:48,958 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1] [2019-10-22 09:01:49,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:49,158 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:49,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:49,159 INFO L82 PathProgramCache]: Analyzing trace with hash -921458965, now seen corresponding path program 4 times [2019-10-22 09:01:49,159 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:49,159 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [605833188] [2019-10-22 09:01:49,159 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:49,211 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:49,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:49,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 09:01:49,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:49,287 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 09:01:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:49,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [605833188] [2019-10-22 09:01:49,427 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:49,427 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-10-22 09:01:49,427 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982568301] [2019-10-22 09:01:49,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-22 09:01:49,428 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 09:01:49,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-22 09:01:49,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2019-10-22 09:01:49,428 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 16 states. [2019-10-22 09:01:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:49,694 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2019-10-22 09:01:49,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-22 09:01:49,696 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-10-22 09:01:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:49,697 INFO L225 Difference]: With dead ends: 80 [2019-10-22 09:01:49,697 INFO L226 Difference]: Without dead ends: 42 [2019-10-22 09:01:49,697 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2019-10-22 09:01:49,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-22 09:01:49,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-22 09:01:49,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-22 09:01:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-10-22 09:01:49,711 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 23 [2019-10-22 09:01:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:49,711 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-10-22 09:01:49,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-22 09:01:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-10-22 09:01:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-22 09:01:49,712 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:49,712 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1] [2019-10-22 09:01:49,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:49,912 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:49,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1658007635, now seen corresponding path program 5 times [2019-10-22 09:01:49,913 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 09:01:49,913 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [721446262] [2019-10-22 09:01:49,913 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:49,968 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-10-22 09:01:49,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:49,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-22 09:01:49,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 09:01:50,250 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 09:01:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 09:01:51,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [721446262] [2019-10-22 09:01:51,130 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:51,130 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2019-10-22 09:01:51,130 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659218918] [2019-10-22 09:01:51,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-22 09:01:51,131 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 09:01:51,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-22 09:01:51,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2019-10-22 09:01:51,132 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 33 states. [2019-10-22 09:01:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:52,433 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-10-22 09:01:52,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-22 09:01:52,433 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 29 [2019-10-22 09:01:52,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:52,434 INFO L225 Difference]: With dead ends: 47 [2019-10-22 09:01:52,434 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 09:01:52,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=302, Invalid=1338, Unknown=0, NotChecked=0, Total=1640 [2019-10-22 09:01:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 09:01:52,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 09:01:52,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 09:01:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 09:01:52,437 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2019-10-22 09:01:52,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:52,437 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 09:01:52,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-22 09:01:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 09:01:52,437 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 09:01:52,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 09:01:52,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 09:01:53,166 WARN L191 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 62 [2019-10-22 09:01:53,168 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 09:01:53,169 INFO L446 ceAbstractionStarter]: At program point L31(lines 12 32) the Hoare annotation is: true [2019-10-22 09:01:53,169 INFO L439 ceAbstractionStarter]: At program point L21-2(lines 21 28) the Hoare annotation is: (let ((.cse7 (= (_ bv0 32) ((_ zero_extend 24) ULTIMATE.start_main_~bit~0)))) (let ((.cse2 (not .cse7)) (.cse4 (= (_ bv1 8) ULTIMATE.start_main_~y~0)) (.cse3 (= ULTIMATE.start_main_~bit~0 (_ bv0 8))) (.cse1 (= (_ bv5 8) ULTIMATE.start_main_~y~0)) (.cse5 (= (_ bv37 8) ULTIMATE.start_main_~y~0)) (.cse0 (= (_ bv37 8) ULTIMATE.start_main_~x~0))) (or (and (= (_ bv0 8) ULTIMATE.start_main_~c~0) (= (_ bv0 8) ULTIMATE.start_main_~y~0) .cse0) (and .cse1 (and .cse0 (= (_ bv3 8) ULTIMATE.start_main_~c~0)) .cse2) (and .cse3 .cse1 .cse0 (= (_ bv5 8) ULTIMATE.start_main_~c~0)) (and .cse4 (= (_ bv1 8) ULTIMATE.start_main_~c~0) .cse0 .cse2) (let ((.cse6 ((_ zero_extend 24) ((_ extract 7 0) (bvadd ((_ zero_extend 24) ULTIMATE.start_main_~c~0) (_ bv1 32)))))) (and .cse5 .cse0 (not (bvslt .cse6 (_ bv8 32))) (= ((_ zero_extend 24) ((_ extract 7 0) (bvadd ((_ zero_extend 24) ULTIMATE.start_main_~y~0) ((_ zero_extend 24) ((_ extract 7 0) (bvshl (_ bv1 32) ((_ zero_extend 24) ((_ extract 7 0) (bvadd .cse6 (_ bv1 32)))))))))) ((_ zero_extend 24) ULTIMATE.start_main_~x~0)) .cse7)) (and .cse4 .cse3 .cse0 (= (_ bv2 8) ULTIMATE.start_main_~c~0)) (and .cse3 .cse1 .cse0 (= (_ bv4 8) ULTIMATE.start_main_~c~0)) (and (= (bvadd ULTIMATE.start_main_~bit~0 (_ bv224 8)) (_ bv0 8)) .cse5 .cse0 (= (_ bv6 8) ULTIMATE.start_main_~c~0))))) [2019-10-22 09:01:53,169 INFO L443 ceAbstractionStarter]: For program point L21-3(lines 21 28) no Hoare annotation was computed. [2019-10-22 09:01:53,169 INFO L443 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2019-10-22 09:01:53,169 INFO L446 ceAbstractionStarter]: At program point L5-2(lines 4 9) the Hoare annotation is: true [2019-10-22 09:01:53,169 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 09:01:53,169 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 09:01:53,170 INFO L443 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2019-10-22 09:01:53,170 INFO L443 ceAbstractionStarter]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2019-10-22 09:01:53,170 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2019-10-22 09:01:53,170 INFO L443 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2019-10-22 09:01:53,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:01:53 BoogieIcfgContainer [2019-10-22 09:01:53,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:01:53,185 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:01:53,185 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:01:53,185 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:01:53,185 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:45" (3/4) ... [2019-10-22 09:01:53,189 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 09:01:53,198 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-10-22 09:01:53,199 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 09:01:53,232 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_200eb074-5acb-499d-a485-a70eeddd9878/bin/uautomizer/witness.graphml [2019-10-22 09:01:53,232 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:01:53,234 INFO L168 Benchmark]: Toolchain (without parser) took 8056.67 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 260.0 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -296.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:53,234 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:53,234 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.39 ms. Allocated memory is still 1.0 GB. Free memory was 941.6 MB in the beginning and 930.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:53,235 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.92 ms. Allocated memory is still 1.0 GB. Free memory is still 930.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:53,235 INFO L168 Benchmark]: Boogie Preprocessor took 98.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 930.9 MB in the beginning and 1.1 GB in the end (delta: -216.8 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:53,235 INFO L168 Benchmark]: RCFGBuilder took 207.39 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: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:53,236 INFO L168 Benchmark]: TraceAbstraction took 7409.12 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 108.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -107.6 MB). Peak memory consumption was 365.2 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:53,236 INFO L168 Benchmark]: Witness Printer took 47.90 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:53,238 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 253.39 ms. Allocated memory is still 1.0 GB. Free memory was 941.6 MB in the beginning and 930.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 35.92 ms. Allocated memory is still 1.0 GB. Free memory is still 930.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 98.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 930.9 MB in the beginning and 1.1 GB in the end (delta: -216.8 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 207.39 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: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7409.12 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 108.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -107.6 MB). Peak memory consumption was 365.2 MB. Max. memory is 11.5 GB. * Witness Printer took 47.90 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 4]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((((((((0bv8 == c && 0bv8 == y) && 37bv8 == x) || ((5bv8 == y && 37bv8 == x && 3bv8 == c) && !(0bv32 == ~zero_extendFrom8To32(bit)))) || (((bit == 0bv8 && 5bv8 == y) && 37bv8 == x) && 5bv8 == c)) || (((1bv8 == y && 1bv8 == c) && 37bv8 == x) && !(0bv32 == ~zero_extendFrom8To32(bit)))) || ((((37bv8 == y && 37bv8 == x) && !~bvslt32(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 8bv32)) && ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(y), ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]))[7:0]))[7:0]) == ~zero_extendFrom8To32(x)) && 0bv32 == ~zero_extendFrom8To32(bit))) || (((1bv8 == y && bit == 0bv8) && 37bv8 == x) && 2bv8 == c)) || (((bit == 0bv8 && 5bv8 == y) && 37bv8 == x) && 4bv8 == c)) || (((~bvadd64(bit, 224bv8) == 0bv8 && 37bv8 == y) && 37bv8 == x) && 6bv8 == c) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Result: SAFE, OverallTime: 7.3s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, HoareTripleCheckerStatistics: 64 SDtfs, 317 SDslu, 211 SDs, 0 SdLazy, 777 SolverSat, 140 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 283 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 49 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 19 NumberOfFragments, 140 HoareAnnotationTreeSize, 3 FomulaSimplifications, 518 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 641 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 130 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 244 ConstructedInterpolants, 17 QuantifiedInterpolants, 74076 SizeOfPredicates, 27 NumberOfNonLiveVariables, 224 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 158/510 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...