./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 a2c46755d0cb80f6b2e7b990e0a1bd9a49737b84 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 a2c46755d0cb80f6b2e7b990e0a1bd9a49737b84 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-19 22:15:33,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 22:15:33,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 22:15:33,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 22:15:33,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 22:15:33,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 22:15:33,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 22:15:33,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 22:15:33,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 22:15:33,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 22:15:33,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 22:15:33,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 22:15:33,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 22:15:33,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 22:15:33,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 22:15:33,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 22:15:33,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 22:15:33,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 22:15:33,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 22:15:33,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 22:15:33,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 22:15:33,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 22:15:33,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 22:15:33,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 22:15:33,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 22:15:33,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 22:15:33,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 22:15:33,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 22:15:33,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 22:15:33,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 22:15:33,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 22:15:33,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 22:15:33,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 22:15:33,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 22:15:33,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 22:15:33,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 22:15:33,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 22:15:33,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 22:15:33,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 22:15:33,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 22:15:33,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 22:15:33,771 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 22:15:33,787 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 22:15:33,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 22:15:33,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 22:15:33,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 22:15:33,789 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 22:15:33,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 22:15:33,789 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 22:15:33,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 22:15:33,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 22:15:33,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 22:15:33,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 22:15:33,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 22:15:33,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 22:15:33,791 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 22:15:33,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 22:15:33,792 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 22:15:33,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 22:15:33,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 22:15:33,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 22:15:33,793 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 22:15:33,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 22:15:33,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 22:15:33,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 22:15:33,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 22:15:33,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 22:15:33,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 22:15:33,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 22:15:33,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 22:15:33,796 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/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 -> a2c46755d0cb80f6b2e7b990e0a1bd9a49737b84 [2019-11-19 22:15:33,998 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 22:15:34,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 22:15:34,017 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 22:15:34,019 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 22:15:34,019 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 22:15:34,020 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/../../sv-benchmarks/c/bitvector/byte_add-1.i [2019-11-19 22:15:34,088 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/data/a5cced6af/ced523f33a544254926bf2b3d7d6b070/FLAG30302ee4b [2019-11-19 22:15:34,653 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 22:15:34,654 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/sv-benchmarks/c/bitvector/byte_add-1.i [2019-11-19 22:15:34,666 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/data/a5cced6af/ced523f33a544254926bf2b3d7d6b070/FLAG30302ee4b [2019-11-19 22:15:34,966 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/data/a5cced6af/ced523f33a544254926bf2b3d7d6b070 [2019-11-19 22:15:34,969 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 22:15:34,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 22:15:34,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 22:15:34,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 22:15:34,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 22:15:34,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:15:34" (1/1) ... [2019-11-19 22:15:34,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b17be4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:34, skipping insertion in model container [2019-11-19 22:15:34,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:15:34" (1/1) ... [2019-11-19 22:15:34,991 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 22:15:35,024 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 22:15:35,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:15:35,342 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 22:15:35,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:15:35,404 INFO L192 MainTranslator]: Completed translation [2019-11-19 22:15:35,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:35 WrapperNode [2019-11-19 22:15:35,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 22:15:35,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 22:15:35,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 22:15:35,406 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 22:15:35,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:35" (1/1) ... [2019-11-19 22:15:35,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:35" (1/1) ... [2019-11-19 22:15:35,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 22:15:35,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 22:15:35,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 22:15:35,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 22:15:35,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:35" (1/1) ... [2019-11-19 22:15:35,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:35" (1/1) ... [2019-11-19 22:15:35,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:35" (1/1) ... [2019-11-19 22:15:35,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:35" (1/1) ... [2019-11-19 22:15:35,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:35" (1/1) ... [2019-11-19 22:15:35,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:35" (1/1) ... [2019-11-19 22:15:35,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:35" (1/1) ... [2019-11-19 22:15:35,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 22:15:35,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 22:15:35,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 22:15:35,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 22:15:35,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:15:35,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 22:15:35,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 22:15:36,160 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 22:15:36,161 INFO L285 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-19 22:15:36,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:15:36 BoogieIcfgContainer [2019-11-19 22:15:36,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 22:15:36,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 22:15:36,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 22:15:36,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 22:15:36,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 10:15:34" (1/3) ... [2019-11-19 22:15:36,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4e07a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:15:36, skipping insertion in model container [2019-11-19 22:15:36,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:35" (2/3) ... [2019-11-19 22:15:36,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4e07a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:15:36, skipping insertion in model container [2019-11-19 22:15:36,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:15:36" (3/3) ... [2019-11-19 22:15:36,173 INFO L109 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2019-11-19 22:15:36,184 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 22:15:36,192 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 22:15:36,204 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 22:15:36,239 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 22:15:36,239 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 22:15:36,240 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 22:15:36,240 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 22:15:36,240 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 22:15:36,241 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 22:15:36,241 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 22:15:36,242 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 22:15:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2019-11-19 22:15:36,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-19 22:15:36,270 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:36,271 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:36,271 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:36,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:36,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1818568748, now seen corresponding path program 1 times [2019-11-19 22:15:36,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:36,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185544397] [2019-11-19 22:15:36,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:15:36,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185544397] [2019-11-19 22:15:36,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:15:36,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 22:15:36,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956959532] [2019-11-19 22:15:36,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 22:15:36,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:36,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 22:15:36,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 22:15:36,493 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2019-11-19 22:15:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:36,521 INFO L93 Difference]: Finished difference Result 56 states and 91 transitions. [2019-11-19 22:15:36,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 22:15:36,523 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-19 22:15:36,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:36,537 INFO L225 Difference]: With dead ends: 56 [2019-11-19 22:15:36,537 INFO L226 Difference]: Without dead ends: 37 [2019-11-19 22:15:36,542 INFO L630 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 [2019-11-19 22:15:36,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-19 22:15:36,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-19 22:15:36,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-19 22:15:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 63 transitions. [2019-11-19 22:15:36,593 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 63 transitions. Word has length 11 [2019-11-19 22:15:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:36,594 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 63 transitions. [2019-11-19 22:15:36,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 22:15:36,595 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 63 transitions. [2019-11-19 22:15:36,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-19 22:15:36,597 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:36,598 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:36,598 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:36,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:36,600 INFO L82 PathProgramCache]: Analyzing trace with hash -927982706, now seen corresponding path program 1 times [2019-11-19 22:15:36,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:36,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844577483] [2019-11-19 22:15:36,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:15:36,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844577483] [2019-11-19 22:15:36,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:15:36,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-19 22:15:36,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503989318] [2019-11-19 22:15:36,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 22:15:36,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:36,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 22:15:36,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 22:15:36,760 INFO L87 Difference]: Start difference. First operand 37 states and 63 transitions. Second operand 3 states. [2019-11-19 22:15:37,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:37,125 INFO L93 Difference]: Finished difference Result 88 states and 155 transitions. [2019-11-19 22:15:37,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 22:15:37,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-19 22:15:37,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:37,127 INFO L225 Difference]: With dead ends: 88 [2019-11-19 22:15:37,127 INFO L226 Difference]: Without dead ends: 60 [2019-11-19 22:15:37,128 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 22:15:37,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-19 22:15:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-19 22:15:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-19 22:15:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 88 transitions. [2019-11-19 22:15:37,137 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 88 transitions. Word has length 11 [2019-11-19 22:15:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:37,137 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 88 transitions. [2019-11-19 22:15:37,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 22:15:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 88 transitions. [2019-11-19 22:15:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-19 22:15:37,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:37,139 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:37,139 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:37,140 INFO L82 PathProgramCache]: Analyzing trace with hash -2028683165, now seen corresponding path program 1 times [2019-11-19 22:15:37,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:37,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903570388] [2019-11-19 22:15:37,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:15:37,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903570388] [2019-11-19 22:15:37,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:15:37,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-19 22:15:37,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699244144] [2019-11-19 22:15:37,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 22:15:37,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:37,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 22:15:37,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-19 22:15:37,296 INFO L87 Difference]: Start difference. First operand 58 states and 88 transitions. Second operand 5 states. [2019-11-19 22:15:37,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:37,771 INFO L93 Difference]: Finished difference Result 151 states and 230 transitions. [2019-11-19 22:15:37,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 22:15:37,772 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-19 22:15:37,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:37,774 INFO L225 Difference]: With dead ends: 151 [2019-11-19 22:15:37,774 INFO L226 Difference]: Without dead ends: 108 [2019-11-19 22:15:37,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-19 22:15:37,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-19 22:15:37,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 65. [2019-11-19 22:15:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-19 22:15:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 98 transitions. [2019-11-19 22:15:37,795 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 98 transitions. Word has length 17 [2019-11-19 22:15:37,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:37,795 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 98 transitions. [2019-11-19 22:15:37,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 22:15:37,795 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 98 transitions. [2019-11-19 22:15:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 22:15:37,797 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:37,797 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:37,797 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:37,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1576590710, now seen corresponding path program 1 times [2019-11-19 22:15:37,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:37,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257566] [2019-11-19 22:15:37,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:15:37,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257566] [2019-11-19 22:15:37,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:15:37,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 22:15:37,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551670077] [2019-11-19 22:15:37,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 22:15:37,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:37,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 22:15:37,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-19 22:15:37,956 INFO L87 Difference]: Start difference. First operand 65 states and 98 transitions. Second operand 5 states. [2019-11-19 22:15:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:38,349 INFO L93 Difference]: Finished difference Result 152 states and 230 transitions. [2019-11-19 22:15:38,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 22:15:38,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-11-19 22:15:38,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:38,351 INFO L225 Difference]: With dead ends: 152 [2019-11-19 22:15:38,351 INFO L226 Difference]: Without dead ends: 114 [2019-11-19 22:15:38,352 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-19 22:15:38,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-19 22:15:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2019-11-19 22:15:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-19 22:15:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 110 transitions. [2019-11-19 22:15:38,377 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 110 transitions. Word has length 18 [2019-11-19 22:15:38,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:38,378 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 110 transitions. [2019-11-19 22:15:38,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 22:15:38,378 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 110 transitions. [2019-11-19 22:15:38,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 22:15:38,380 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:38,380 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:38,381 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:38,382 INFO L82 PathProgramCache]: Analyzing trace with hash 511533202, now seen corresponding path program 1 times [2019-11-19 22:15:38,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:38,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056793685] [2019-11-19 22:15:38,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:15:38,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056793685] [2019-11-19 22:15:38,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225739729] [2019-11-19 22:15:38,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:15:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:38,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:15:38,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:15:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:15:38,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:15:38,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-11-19 22:15:38,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722543770] [2019-11-19 22:15:38,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 22:15:38,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:38,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 22:15:38,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-19 22:15:38,650 INFO L87 Difference]: Start difference. First operand 76 states and 110 transitions. Second operand 4 states. [2019-11-19 22:15:38,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:38,946 INFO L93 Difference]: Finished difference Result 145 states and 236 transitions. [2019-11-19 22:15:38,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 22:15:38,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-19 22:15:38,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:38,948 INFO L225 Difference]: With dead ends: 145 [2019-11-19 22:15:38,948 INFO L226 Difference]: Without dead ends: 117 [2019-11-19 22:15:38,949 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-19 22:15:38,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-19 22:15:38,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 99. [2019-11-19 22:15:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-19 22:15:38,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 137 transitions. [2019-11-19 22:15:38,966 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 137 transitions. Word has length 19 [2019-11-19 22:15:38,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:38,966 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 137 transitions. [2019-11-19 22:15:38,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 22:15:38,967 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 137 transitions. [2019-11-19 22:15:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-19 22:15:38,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:38,969 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:39,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:15:39,174 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:39,174 INFO L82 PathProgramCache]: Analyzing trace with hash 817706659, now seen corresponding path program 1 times [2019-11-19 22:15:39,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:39,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091986933] [2019-11-19 22:15:39,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:15:39,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091986933] [2019-11-19 22:15:39,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262362902] [2019-11-19 22:15:39,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:15:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:39,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 22:15:39,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:15:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-19 22:15:39,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:15:39,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2019-11-19 22:15:39,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981516354] [2019-11-19 22:15:39,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 22:15:39,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:39,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 22:15:39,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-19 22:15:39,376 INFO L87 Difference]: Start difference. First operand 99 states and 137 transitions. Second operand 4 states. [2019-11-19 22:15:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:41,815 INFO L93 Difference]: Finished difference Result 211 states and 312 transitions. [2019-11-19 22:15:41,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 22:15:41,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-19 22:15:41,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:41,817 INFO L225 Difference]: With dead ends: 211 [2019-11-19 22:15:41,818 INFO L226 Difference]: Without dead ends: 144 [2019-11-19 22:15:41,821 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-19 22:15:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-19 22:15:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 122. [2019-11-19 22:15:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-19 22:15:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 164 transitions. [2019-11-19 22:15:41,833 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 164 transitions. Word has length 25 [2019-11-19 22:15:41,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:41,834 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 164 transitions. [2019-11-19 22:15:41,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 22:15:41,834 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 164 transitions. [2019-11-19 22:15:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-19 22:15:41,836 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:41,836 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:42,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:15:42,040 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:42,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:42,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1454047176, now seen corresponding path program 1 times [2019-11-19 22:15:42,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:42,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496574933] [2019-11-19 22:15:42,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:15:42,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496574933] [2019-11-19 22:15:42,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488779421] [2019-11-19 22:15:42,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:15:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:42,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 22:15:42,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:15:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-19 22:15:42,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:15:42,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2019-11-19 22:15:42,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588512799] [2019-11-19 22:15:42,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 22:15:42,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:42,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 22:15:42,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-19 22:15:42,249 INFO L87 Difference]: Start difference. First operand 122 states and 164 transitions. Second operand 4 states. [2019-11-19 22:15:42,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:42,850 INFO L93 Difference]: Finished difference Result 257 states and 364 transitions. [2019-11-19 22:15:42,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 22:15:42,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-11-19 22:15:42,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:42,853 INFO L225 Difference]: With dead ends: 257 [2019-11-19 22:15:42,853 INFO L226 Difference]: Without dead ends: 167 [2019-11-19 22:15:42,854 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-19 22:15:42,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-11-19 22:15:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 145. [2019-11-19 22:15:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-19 22:15:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 191 transitions. [2019-11-19 22:15:42,866 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 191 transitions. Word has length 31 [2019-11-19 22:15:42,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:42,866 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 191 transitions. [2019-11-19 22:15:42,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 22:15:42,867 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 191 transitions. [2019-11-19 22:15:42,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-19 22:15:42,869 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:42,869 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:43,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:15:43,074 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:43,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:43,074 INFO L82 PathProgramCache]: Analyzing trace with hash 153643337, now seen corresponding path program 1 times [2019-11-19 22:15:43,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:43,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303664187] [2019-11-19 22:15:43,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-19 22:15:43,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303664187] [2019-11-19 22:15:43,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:15:43,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 22:15:43,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297407131] [2019-11-19 22:15:43,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 22:15:43,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:43,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 22:15:43,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-19 22:15:43,179 INFO L87 Difference]: Start difference. First operand 145 states and 191 transitions. Second operand 6 states. [2019-11-19 22:15:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:43,803 INFO L93 Difference]: Finished difference Result 515 states and 671 transitions. [2019-11-19 22:15:43,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 22:15:43,803 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-11-19 22:15:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:43,806 INFO L225 Difference]: With dead ends: 515 [2019-11-19 22:15:43,806 INFO L226 Difference]: Without dead ends: 399 [2019-11-19 22:15:43,807 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-19 22:15:43,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2019-11-19 22:15:43,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 145. [2019-11-19 22:15:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-19 22:15:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 191 transitions. [2019-11-19 22:15:43,823 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 191 transitions. Word has length 37 [2019-11-19 22:15:43,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:43,823 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 191 transitions. [2019-11-19 22:15:43,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 22:15:43,823 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 191 transitions. [2019-11-19 22:15:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-19 22:15:43,838 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:43,838 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:43,839 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:43,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:43,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1738720613, now seen corresponding path program 1 times [2019-11-19 22:15:43,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:43,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434359881] [2019-11-19 22:15:43,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-19 22:15:43,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434359881] [2019-11-19 22:15:43,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:15:43,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-19 22:15:43,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414145707] [2019-11-19 22:15:43,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 22:15:43,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:43,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 22:15:43,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-19 22:15:43,952 INFO L87 Difference]: Start difference. First operand 145 states and 191 transitions. Second operand 6 states. [2019-11-19 22:15:44,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:44,496 INFO L93 Difference]: Finished difference Result 499 states and 651 transitions. [2019-11-19 22:15:44,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 22:15:44,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2019-11-19 22:15:44,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:44,499 INFO L225 Difference]: With dead ends: 499 [2019-11-19 22:15:44,500 INFO L226 Difference]: Without dead ends: 384 [2019-11-19 22:15:44,500 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-19 22:15:44,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2019-11-19 22:15:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 311. [2019-11-19 22:15:44,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2019-11-19 22:15:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 416 transitions. [2019-11-19 22:15:44,517 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 416 transitions. Word has length 38 [2019-11-19 22:15:44,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:44,517 INFO L462 AbstractCegarLoop]: Abstraction has 311 states and 416 transitions. [2019-11-19 22:15:44,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 22:15:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 416 transitions. [2019-11-19 22:15:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-19 22:15:44,519 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:44,520 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:44,520 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:44,520 INFO L82 PathProgramCache]: Analyzing trace with hash 114978384, now seen corresponding path program 1 times [2019-11-19 22:15:44,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:44,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831003195] [2019-11-19 22:15:44,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-19 22:15:44,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831003195] [2019-11-19 22:15:44,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:15:44,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-19 22:15:44,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342966667] [2019-11-19 22:15:44,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 22:15:44,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:44,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 22:15:44,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-19 22:15:44,694 INFO L87 Difference]: Start difference. First operand 311 states and 416 transitions. Second operand 8 states. [2019-11-19 22:15:46,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:46,025 INFO L93 Difference]: Finished difference Result 1638 states and 2235 transitions. [2019-11-19 22:15:46,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 22:15:46,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2019-11-19 22:15:46,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:46,036 INFO L225 Difference]: With dead ends: 1638 [2019-11-19 22:15:46,037 INFO L226 Difference]: Without dead ends: 1318 [2019-11-19 22:15:46,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-19 22:15:46,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2019-11-19 22:15:46,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 982. [2019-11-19 22:15:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2019-11-19 22:15:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1334 transitions. [2019-11-19 22:15:46,094 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1334 transitions. Word has length 39 [2019-11-19 22:15:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:46,094 INFO L462 AbstractCegarLoop]: Abstraction has 982 states and 1334 transitions. [2019-11-19 22:15:46,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 22:15:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1334 transitions. [2019-11-19 22:15:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-19 22:15:46,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:46,099 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:46,099 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:46,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:46,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1859362712, now seen corresponding path program 1 times [2019-11-19 22:15:46,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:46,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346917412] [2019-11-19 22:15:46,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-19 22:15:46,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346917412] [2019-11-19 22:15:46,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148458344] [2019-11-19 22:15:46,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:15:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:46,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-19 22:15:46,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:15:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-19 22:15:46,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:15:46,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-11-19 22:15:46,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224046846] [2019-11-19 22:15:46,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 22:15:46,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:46,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 22:15:46,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-19 22:15:46,475 INFO L87 Difference]: Start difference. First operand 982 states and 1334 transitions. Second operand 4 states. [2019-11-19 22:15:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:46,717 INFO L93 Difference]: Finished difference Result 1371 states and 1862 transitions. [2019-11-19 22:15:46,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 22:15:46,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2019-11-19 22:15:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:46,724 INFO L225 Difference]: With dead ends: 1371 [2019-11-19 22:15:46,724 INFO L226 Difference]: Without dead ends: 1020 [2019-11-19 22:15:46,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-19 22:15:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2019-11-19 22:15:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 1012. [2019-11-19 22:15:46,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1012 states. [2019-11-19 22:15:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1351 transitions. [2019-11-19 22:15:46,781 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1351 transitions. Word has length 44 [2019-11-19 22:15:46,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:46,783 INFO L462 AbstractCegarLoop]: Abstraction has 1012 states and 1351 transitions. [2019-11-19 22:15:46,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 22:15:46,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1351 transitions. [2019-11-19 22:15:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-19 22:15:46,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:46,786 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:46,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:15:46,989 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:46,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:46,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1051976431, now seen corresponding path program 1 times [2019-11-19 22:15:46,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:46,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569872540] [2019-11-19 22:15:46,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-19 22:15:47,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569872540] [2019-11-19 22:15:47,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131877669] [2019-11-19 22:15:47,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:15:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:47,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-19 22:15:47,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:15:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-19 22:15:47,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:15:47,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2019-11-19 22:15:47,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491452993] [2019-11-19 22:15:47,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 22:15:47,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:47,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 22:15:47,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2019-11-19 22:15:47,557 INFO L87 Difference]: Start difference. First operand 1012 states and 1351 transitions. Second operand 10 states. [2019-11-19 22:15:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:48,414 INFO L93 Difference]: Finished difference Result 1346 states and 1773 transitions. [2019-11-19 22:15:48,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 22:15:48,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-11-19 22:15:48,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:48,422 INFO L225 Difference]: With dead ends: 1346 [2019-11-19 22:15:48,423 INFO L226 Difference]: Without dead ends: 1224 [2019-11-19 22:15:48,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2019-11-19 22:15:48,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2019-11-19 22:15:48,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1083. [2019-11-19 22:15:48,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1083 states. [2019-11-19 22:15:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1445 transitions. [2019-11-19 22:15:48,471 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1445 transitions. Word has length 45 [2019-11-19 22:15:48,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:48,471 INFO L462 AbstractCegarLoop]: Abstraction has 1083 states and 1445 transitions. [2019-11-19 22:15:48,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 22:15:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1445 transitions. [2019-11-19 22:15:48,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-19 22:15:48,474 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:48,474 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:48,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:15:48,687 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:48,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:48,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1397623699, now seen corresponding path program 1 times [2019-11-19 22:15:48,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:48,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175095980] [2019-11-19 22:15:48,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-19 22:15:48,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175095980] [2019-11-19 22:15:48,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333481929] [2019-11-19 22:15:48,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:15:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:48,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-19 22:15:48,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:15:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-19 22:15:49,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:15:49,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2019-11-19 22:15:49,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435028262] [2019-11-19 22:15:49,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 22:15:49,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:49,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 22:15:49,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-19 22:15:49,071 INFO L87 Difference]: Start difference. First operand 1083 states and 1445 transitions. Second operand 7 states. [2019-11-19 22:15:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:49,996 INFO L93 Difference]: Finished difference Result 2392 states and 3203 transitions. [2019-11-19 22:15:49,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-19 22:15:49,997 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2019-11-19 22:15:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:50,005 INFO L225 Difference]: With dead ends: 2392 [2019-11-19 22:15:50,005 INFO L226 Difference]: Without dead ends: 1311 [2019-11-19 22:15:50,007 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-11-19 22:15:50,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2019-11-19 22:15:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1133. [2019-11-19 22:15:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1133 states. [2019-11-19 22:15:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1469 transitions. [2019-11-19 22:15:50,053 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1469 transitions. Word has length 45 [2019-11-19 22:15:50,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:50,053 INFO L462 AbstractCegarLoop]: Abstraction has 1133 states and 1469 transitions. [2019-11-19 22:15:50,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 22:15:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1469 transitions. [2019-11-19 22:15:50,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-19 22:15:50,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:50,055 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:50,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:15:50,265 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:50,266 INFO L82 PathProgramCache]: Analyzing trace with hash -718889683, now seen corresponding path program 1 times [2019-11-19 22:15:50,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:50,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185442054] [2019-11-19 22:15:50,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-19 22:15:50,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185442054] [2019-11-19 22:15:50,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:15:50,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-19 22:15:50,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493517593] [2019-11-19 22:15:50,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-19 22:15:50,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:50,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-19 22:15:50,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-19 22:15:50,454 INFO L87 Difference]: Start difference. First operand 1133 states and 1469 transitions. Second operand 9 states. [2019-11-19 22:15:51,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:51,649 INFO L93 Difference]: Finished difference Result 2417 states and 3169 transitions. [2019-11-19 22:15:51,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 22:15:51,650 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2019-11-19 22:15:51,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:51,661 INFO L225 Difference]: With dead ends: 2417 [2019-11-19 22:15:51,662 INFO L226 Difference]: Without dead ends: 1628 [2019-11-19 22:15:51,663 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-19 22:15:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2019-11-19 22:15:51,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1364. [2019-11-19 22:15:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1364 states. [2019-11-19 22:15:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 1759 transitions. [2019-11-19 22:15:51,715 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 1759 transitions. Word has length 46 [2019-11-19 22:15:51,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:51,716 INFO L462 AbstractCegarLoop]: Abstraction has 1364 states and 1759 transitions. [2019-11-19 22:15:51,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-19 22:15:51,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 1759 transitions. [2019-11-19 22:15:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-19 22:15:51,718 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:51,719 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:51,719 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:51,719 INFO L82 PathProgramCache]: Analyzing trace with hash 190973292, now seen corresponding path program 1 times [2019-11-19 22:15:51,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:51,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592828823] [2019-11-19 22:15:51,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-19 22:15:51,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592828823] [2019-11-19 22:15:51,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597519700] [2019-11-19 22:15:51,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:15:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:51,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-19 22:15:51,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:15:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-19 22:15:51,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:15:51,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 8 [2019-11-19 22:15:51,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738195272] [2019-11-19 22:15:51,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 22:15:51,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:51,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 22:15:51,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-19 22:15:51,980 INFO L87 Difference]: Start difference. First operand 1364 states and 1759 transitions. Second operand 4 states. [2019-11-19 22:15:52,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:52,134 INFO L93 Difference]: Finished difference Result 1825 states and 2357 transitions. [2019-11-19 22:15:52,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 22:15:52,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2019-11-19 22:15:52,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:52,143 INFO L225 Difference]: With dead ends: 1825 [2019-11-19 22:15:52,143 INFO L226 Difference]: Without dead ends: 1407 [2019-11-19 22:15:52,146 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-19 22:15:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2019-11-19 22:15:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1371. [2019-11-19 22:15:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1371 states. [2019-11-19 22:15:52,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 1754 transitions. [2019-11-19 22:15:52,192 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 1754 transitions. Word has length 48 [2019-11-19 22:15:52,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:52,192 INFO L462 AbstractCegarLoop]: Abstraction has 1371 states and 1754 transitions. [2019-11-19 22:15:52,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 22:15:52,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 1754 transitions. [2019-11-19 22:15:52,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-19 22:15:52,195 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:52,195 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:52,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:15:52,399 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:52,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:52,399 INFO L82 PathProgramCache]: Analyzing trace with hash -628542036, now seen corresponding path program 1 times [2019-11-19 22:15:52,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:52,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949125833] [2019-11-19 22:15:52,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-19 22:15:52,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949125833] [2019-11-19 22:15:52,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024273647] [2019-11-19 22:15:52,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:15:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:52,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-19 22:15:52,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:15:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-19 22:15:52,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:15:52,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2019-11-19 22:15:52,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363051736] [2019-11-19 22:15:52,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-19 22:15:52,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:52,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-19 22:15:52,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-11-19 22:15:52,822 INFO L87 Difference]: Start difference. First operand 1371 states and 1754 transitions. Second operand 11 states. [2019-11-19 22:15:54,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:54,186 INFO L93 Difference]: Finished difference Result 2960 states and 3855 transitions. [2019-11-19 22:15:54,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-19 22:15:54,187 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2019-11-19 22:15:54,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:54,195 INFO L225 Difference]: With dead ends: 2960 [2019-11-19 22:15:54,195 INFO L226 Difference]: Without dead ends: 1645 [2019-11-19 22:15:54,198 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2019-11-19 22:15:54,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2019-11-19 22:15:54,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1442. [2019-11-19 22:15:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2019-11-19 22:15:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1844 transitions. [2019-11-19 22:15:54,249 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1844 transitions. Word has length 49 [2019-11-19 22:15:54,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:54,250 INFO L462 AbstractCegarLoop]: Abstraction has 1442 states and 1844 transitions. [2019-11-19 22:15:54,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-19 22:15:54,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1844 transitions. [2019-11-19 22:15:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-19 22:15:54,252 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:54,253 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:54,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:15:54,456 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:54,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1299730666, now seen corresponding path program 1 times [2019-11-19 22:15:54,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:54,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630370013] [2019-11-19 22:15:54,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-19 22:15:54,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630370013] [2019-11-19 22:15:54,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485490472] [2019-11-19 22:15:54,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:15:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:15:54,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-19 22:15:54,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:15:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-19 22:15:54,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-19 22:15:54,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2019-11-19 22:15:54,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226009928] [2019-11-19 22:15:54,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 22:15:54,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:15:54,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 22:15:54,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-19 22:15:54,789 INFO L87 Difference]: Start difference. First operand 1442 states and 1844 transitions. Second operand 6 states. [2019-11-19 22:15:55,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:15:55,326 INFO L93 Difference]: Finished difference Result 1771 states and 2254 transitions. [2019-11-19 22:15:55,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-19 22:15:55,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-11-19 22:15:55,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:15:55,333 INFO L225 Difference]: With dead ends: 1771 [2019-11-19 22:15:55,333 INFO L226 Difference]: Without dead ends: 1529 [2019-11-19 22:15:55,334 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-11-19 22:15:55,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2019-11-19 22:15:55,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1437. [2019-11-19 22:15:55,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1437 states. [2019-11-19 22:15:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 1828 transitions. [2019-11-19 22:15:55,376 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 1828 transitions. Word has length 49 [2019-11-19 22:15:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:15:55,377 INFO L462 AbstractCegarLoop]: Abstraction has 1437 states and 1828 transitions. [2019-11-19 22:15:55,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 22:15:55,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 1828 transitions. [2019-11-19 22:15:55,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-19 22:15:55,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:15:55,380 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:15:55,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:15:55,583 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:15:55,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:15:55,583 INFO L82 PathProgramCache]: Analyzing trace with hash 126573537, now seen corresponding path program 1 times [2019-11-19 22:15:55,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:15:55,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781705136] [2019-11-19 22:15:55,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:15:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:15:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:15:55,672 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:15:55,672 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 22:15:55,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 10:15:55 BoogieIcfgContainer [2019-11-19 22:15:55,729 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 22:15:55,730 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 22:15:55,730 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 22:15:55,730 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 22:15:55,739 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:15:36" (3/4) ... [2019-11-19 22:15:55,743 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-19 22:15:55,743 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 22:15:55,745 INFO L168 Benchmark]: Toolchain (without parser) took 20773.74 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 358.6 MB). Free memory was 950.1 MB in the beginning and 1.3 GB in the end (delta: -332.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 11.5 GB. [2019-11-19 22:15:55,745 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:15:55,750 INFO L168 Benchmark]: CACSL2BoogieTranslator took 430.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.7 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -217.1 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. [2019-11-19 22:15:55,750 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.37 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:15:55,751 INFO L168 Benchmark]: Boogie Preprocessor took 43.30 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: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-11-19 22:15:55,751 INFO L168 Benchmark]: RCFGBuilder took 653.44 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: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-11-19 22:15:55,752 INFO L168 Benchmark]: TraceAbstraction took 19566.27 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 181.9 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -142.9 MB). Peak memory consumption was 39.1 MB. Max. memory is 11.5 GB. [2019-11-19 22:15:55,752 INFO L168 Benchmark]: Witness Printer took 13.30 ms. Allocated memory is still 1.4 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:15:55,756 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 430.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.7 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -217.1 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 59.37 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 43.30 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: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 653.44 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: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 19566.27 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 181.9 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -142.9 MB). Peak memory consumption was 39.1 MB. Max. memory is 11.5 GB. * Witness Printer took 13.30 ms. Allocated memory is still 1.4 GB. Free memory is still 1.3 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 bitwiseOr at line 97. Possible FailurePath: [L105] unsigned int a, b, r; [L107] a = __VERIFIER_nondet_uint() [L108] b = __VERIFIER_nondet_uint() [L23] unsigned char a0, a1, a2, a3; [L24] unsigned char b0, b1, b2, b3; [L25] unsigned char r0, r1, r2, r3; [L26] unsigned short carry; [L27] unsigned short partial_sum; [L28] unsigned int r; [L29] unsigned char i; [L30] unsigned char na, nb; [L31] a0 = a [L32] a1 = a >> 8 [L33] a2 = a >> 16U [L34] a3 = a >> 24U [L35] b0 = b [L36] b1 = b >> 8U [L37] b2 = b >> 16U [L38] b3 = b >> 24U [L39] na = (unsigned char)4 [L40] COND TRUE a3 == (unsigned char)0 [L41] na = na - 1 [L42] COND TRUE a2 == (unsigned char)0 [L43] na = na - 1 [L44] COND TRUE a1 == (unsigned char)0 [L45] na = na - 1 [L49] nb = (unsigned char)4 [L50] COND TRUE b3 == (unsigned char)0 [L51] nb = nb - 1 [L52] COND TRUE b2 == (unsigned char)0 [L53] nb = nb - 1 [L54] COND TRUE b1 == (unsigned char)0 [L55] nb = nb - 1 [L59] carry = (unsigned short)0 [L60] i = (unsigned char)0 [L61] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L62] partial_sum = carry [L63] carry = (unsigned short)0 [L64] COND TRUE i < na [L65] COND TRUE i == (unsigned char)0 [L65] partial_sum = partial_sum + a0 [L66] COND FALSE !(i == (unsigned char)1) [L67] COND FALSE !(i == (unsigned char)2) [L68] COND FALSE !(i == (unsigned char)3) [L70] COND TRUE i < nb [L71] COND TRUE i == (unsigned char)0 [L71] partial_sum = partial_sum + b0 [L72] COND FALSE !(i == (unsigned char)1) [L73] COND FALSE !(i == (unsigned char)2) [L74] COND FALSE !(i == (unsigned char)3) [L76] COND FALSE !(partial_sum > ((unsigned char)254)) [L80] COND TRUE i == (unsigned char)0 [L80] r0 = (unsigned char)partial_sum [L81] COND FALSE !(i == (unsigned char)1) [L82] COND FALSE !(i == (unsigned char)2) [L83] COND FALSE !(i == (unsigned char)3) [L85] i = i + (unsigned char)1 [L61] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) [L88] COND TRUE i < (unsigned char)4 [L89] COND FALSE !(i == (unsigned char)0) [L90] COND TRUE i == (unsigned char)1 [L90] r1 = (unsigned char)0 [L91] COND FALSE !(i == (unsigned char)2) [L92] COND FALSE !(i == (unsigned char)3) [L94] i = i + (unsigned char)1 [L88] COND TRUE i < (unsigned char)4 [L89] COND FALSE !(i == (unsigned char)0) [L90] COND FALSE !(i == (unsigned char)1) [L91] COND TRUE i == (unsigned char)2 [L91] r2 = (unsigned char)0 [L92] COND FALSE !(i == (unsigned char)3) [L94] i = i + (unsigned char)1 [L88] COND TRUE i < (unsigned char)4 [L89] COND FALSE !(i == (unsigned char)0) [L90] COND FALSE !(i == (unsigned char)1) [L91] COND FALSE !(i == (unsigned char)2) [L92] COND TRUE i == (unsigned char)3 [L92] r3 = (unsigned char)0 [L94] i = i + (unsigned char)1 [L88] COND FALSE !(i < (unsigned char)4) [L97] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L99] return r; [L110] r = mp_add(a, b) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 1 error locations. Result: UNSAFE, OverallTime: 19.4s, OverallIterations: 18, TraceHistogramMax: 4, AutomataDifference: 12.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1709 SDtfs, 2807 SDslu, 4079 SDs, 0 SdLazy, 5862 SolverSat, 432 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 9.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 487 GetRequests, 336 SyntacticMatches, 15 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1442occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 17 MinimizatonAttempts, 1730 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 977 NumberOfCodeBlocks, 977 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 901 ConstructedInterpolants, 56 QuantifiedInterpolants, 219557 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1009 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 26 InterpolantComputations, 17 PerfectInterpolantSequences, 432/468 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 0.1.24-678e011 [2019-11-19 22:15:57,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 22:15:57,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 22:15:57,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 22:15:57,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 22:15:57,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 22:15:57,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 22:15:57,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 22:15:57,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 22:15:58,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 22:15:58,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 22:15:58,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 22:15:58,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 22:15:58,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 22:15:58,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 22:15:58,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 22:15:58,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 22:15:58,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 22:15:58,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 22:15:58,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 22:15:58,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 22:15:58,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 22:15:58,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 22:15:58,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 22:15:58,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 22:15:58,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 22:15:58,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 22:15:58,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 22:15:58,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 22:15:58,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 22:15:58,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 22:15:58,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 22:15:58,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 22:15:58,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 22:15:58,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 22:15:58,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 22:15:58,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 22:15:58,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 22:15:58,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 22:15:58,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 22:15:58,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 22:15:58,060 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-19 22:15:58,096 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 22:15:58,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 22:15:58,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 22:15:58,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 22:15:58,110 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 22:15:58,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 22:15:58,111 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 22:15:58,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 22:15:58,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 22:15:58,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 22:15:58,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 22:15:58,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 22:15:58,113 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-19 22:15:58,113 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-19 22:15:58,113 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 22:15:58,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 22:15:58,114 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 22:15:58,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 22:15:58,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 22:15:58,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 22:15:58,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 22:15:58,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 22:15:58,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 22:15:58,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 22:15:58,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 22:15:58,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 22:15:58,117 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-19 22:15:58,117 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-19 22:15:58,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 22:15:58,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-19 22:15:58,118 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/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 -> a2c46755d0cb80f6b2e7b990e0a1bd9a49737b84 [2019-11-19 22:15:58,508 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 22:15:58,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 22:15:58,533 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 22:15:58,536 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 22:15:58,536 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 22:15:58,538 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/../../sv-benchmarks/c/bitvector/byte_add-1.i [2019-11-19 22:15:58,597 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/data/b74a35248/8550cba8fc894de2bced0e97d7cafd76/FLAGe3be7ffb0 [2019-11-19 22:15:59,053 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 22:15:59,054 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/sv-benchmarks/c/bitvector/byte_add-1.i [2019-11-19 22:15:59,066 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/data/b74a35248/8550cba8fc894de2bced0e97d7cafd76/FLAGe3be7ffb0 [2019-11-19 22:15:59,376 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/data/b74a35248/8550cba8fc894de2bced0e97d7cafd76 [2019-11-19 22:15:59,379 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 22:15:59,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 22:15:59,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 22:15:59,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 22:15:59,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 22:15:59,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:15:59" (1/1) ... [2019-11-19 22:15:59,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53b95e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:59, skipping insertion in model container [2019-11-19 22:15:59,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:15:59" (1/1) ... [2019-11-19 22:15:59,407 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 22:15:59,447 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 22:15:59,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:15:59,662 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 22:15:59,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:15:59,718 INFO L192 MainTranslator]: Completed translation [2019-11-19 22:15:59,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:59 WrapperNode [2019-11-19 22:15:59,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 22:15:59,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 22:15:59,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 22:15:59,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 22:15:59,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:59" (1/1) ... [2019-11-19 22:15:59,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:59" (1/1) ... [2019-11-19 22:15:59,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 22:15:59,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 22:15:59,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 22:15:59,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 22:15:59,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:59" (1/1) ... [2019-11-19 22:15:59,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:59" (1/1) ... [2019-11-19 22:15:59,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:59" (1/1) ... [2019-11-19 22:15:59,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:59" (1/1) ... [2019-11-19 22:15:59,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:59" (1/1) ... [2019-11-19 22:15:59,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:59" (1/1) ... [2019-11-19 22:15:59,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:59" (1/1) ... [2019-11-19 22:15:59,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 22:15:59,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 22:15:59,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 22:15:59,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 22:15:59,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:15:59,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 22:15:59,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 22:16:00,420 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 22:16:00,420 INFO L285 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-19 22:16:00,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:16:00 BoogieIcfgContainer [2019-11-19 22:16:00,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 22:16:00,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 22:16:00,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 22:16:00,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 22:16:00,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 10:15:59" (1/3) ... [2019-11-19 22:16:00,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378c85b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:16:00, skipping insertion in model container [2019-11-19 22:16:00,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:15:59" (2/3) ... [2019-11-19 22:16:00,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378c85b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:16:00, skipping insertion in model container [2019-11-19 22:16:00,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:16:00" (3/3) ... [2019-11-19 22:16:00,430 INFO L109 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2019-11-19 22:16:00,441 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 22:16:00,453 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 22:16:00,462 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 22:16:00,485 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 22:16:00,485 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 22:16:00,486 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 22:16:00,486 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 22:16:00,486 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 22:16:00,486 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 22:16:00,487 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 22:16:00,487 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 22:16:00,506 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2019-11-19 22:16:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-19 22:16:00,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:16:00,514 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:16:00,514 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:16:00,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:16:00,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1818568748, now seen corresponding path program 1 times [2019-11-19 22:16:00,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:16:00,533 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [235119696] [2019-11-19 22:16:00,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:16:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:16:00,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-19 22:16:00,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:16:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:00,652 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:16:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:00,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [235119696] [2019-11-19 22:16:00,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:16:00,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-19 22:16:00,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358953132] [2019-11-19 22:16:00,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 22:16:00,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:16:00,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 22:16:00,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 22:16:00,678 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2019-11-19 22:16:00,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:16:00,700 INFO L93 Difference]: Finished difference Result 56 states and 91 transitions. [2019-11-19 22:16:00,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 22:16:00,702 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-19 22:16:00,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:16:00,712 INFO L225 Difference]: With dead ends: 56 [2019-11-19 22:16:00,712 INFO L226 Difference]: Without dead ends: 37 [2019-11-19 22:16:00,715 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 22:16:00,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-19 22:16:00,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-19 22:16:00,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-19 22:16:00,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 63 transitions. [2019-11-19 22:16:00,749 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 63 transitions. Word has length 11 [2019-11-19 22:16:00,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:16:00,749 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 63 transitions. [2019-11-19 22:16:00,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 22:16:00,750 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 63 transitions. [2019-11-19 22:16:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-19 22:16:00,751 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:16:00,751 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:16:00,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:16:00,952 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:16:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:16:00,953 INFO L82 PathProgramCache]: Analyzing trace with hash -927982706, now seen corresponding path program 1 times [2019-11-19 22:16:00,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:16:00,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [767859442] [2019-11-19 22:16:00,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:16:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:16:01,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 22:16:01,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:16:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:01,083 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:16:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:01,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [767859442] [2019-11-19 22:16:01,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:16:01,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-19 22:16:01,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186050318] [2019-11-19 22:16:01,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 22:16:01,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:16:01,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 22:16:01,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-19 22:16:01,115 INFO L87 Difference]: Start difference. First operand 37 states and 63 transitions. Second operand 6 states. [2019-11-19 22:16:01,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:16:01,986 INFO L93 Difference]: Finished difference Result 171 states and 300 transitions. [2019-11-19 22:16:01,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 22:16:01,986 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-19 22:16:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:16:01,989 INFO L225 Difference]: With dead ends: 171 [2019-11-19 22:16:01,989 INFO L226 Difference]: Without dead ends: 143 [2019-11-19 22:16:01,991 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-19 22:16:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-11-19 22:16:02,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2019-11-19 22:16:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-19 22:16:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 182 transitions. [2019-11-19 22:16:02,011 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 182 transitions. Word has length 11 [2019-11-19 22:16:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:16:02,011 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 182 transitions. [2019-11-19 22:16:02,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 22:16:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 182 transitions. [2019-11-19 22:16:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-19 22:16:02,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:16:02,013 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:16:02,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:16:02,216 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:16:02,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:16:02,217 INFO L82 PathProgramCache]: Analyzing trace with hash 685151225, now seen corresponding path program 1 times [2019-11-19 22:16:02,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:16:02,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [761265006] [2019-11-19 22:16:02,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:16:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:16:02,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 22:16:02,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:16:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:02,367 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:16:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:02,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [761265006] [2019-11-19 22:16:02,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:16:02,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2019-11-19 22:16:02,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327881097] [2019-11-19 22:16:02,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-19 22:16:02,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:16:02,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-19 22:16:02,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-19 22:16:02,455 INFO L87 Difference]: Start difference. First operand 111 states and 182 transitions. Second operand 12 states. [2019-11-19 22:16:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:16:03,520 INFO L93 Difference]: Finished difference Result 272 states and 462 transitions. [2019-11-19 22:16:03,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 22:16:03,521 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2019-11-19 22:16:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:16:03,524 INFO L225 Difference]: With dead ends: 272 [2019-11-19 22:16:03,524 INFO L226 Difference]: Without dead ends: 227 [2019-11-19 22:16:03,526 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-11-19 22:16:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-11-19 22:16:03,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 183. [2019-11-19 22:16:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-11-19 22:16:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 291 transitions. [2019-11-19 22:16:03,550 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 291 transitions. Word has length 13 [2019-11-19 22:16:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:16:03,550 INFO L462 AbstractCegarLoop]: Abstraction has 183 states and 291 transitions. [2019-11-19 22:16:03,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-19 22:16:03,551 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 291 transitions. [2019-11-19 22:16:03,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-19 22:16:03,553 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:16:03,553 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:16:03,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:16:03,763 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:16:03,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:16:03,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1372883746, now seen corresponding path program 1 times [2019-11-19 22:16:03,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:16:03,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1376650749] [2019-11-19 22:16:03,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:16:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:16:03,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:16:03,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:16:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:03,849 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:16:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:03,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1376650749] [2019-11-19 22:16:03,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:16:03,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-19 22:16:03,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694345086] [2019-11-19 22:16:03,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 22:16:03,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:16:03,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 22:16:03,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 22:16:03,878 INFO L87 Difference]: Start difference. First operand 183 states and 291 transitions. Second operand 4 states. [2019-11-19 22:16:04,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:16:04,103 INFO L93 Difference]: Finished difference Result 465 states and 755 transitions. [2019-11-19 22:16:04,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 22:16:04,103 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-19 22:16:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:16:04,106 INFO L225 Difference]: With dead ends: 465 [2019-11-19 22:16:04,107 INFO L226 Difference]: Without dead ends: 306 [2019-11-19 22:16:04,108 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 22:16:04,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2019-11-19 22:16:04,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 285. [2019-11-19 22:16:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2019-11-19 22:16:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 436 transitions. [2019-11-19 22:16:04,137 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 436 transitions. Word has length 25 [2019-11-19 22:16:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:16:04,138 INFO L462 AbstractCegarLoop]: Abstraction has 285 states and 436 transitions. [2019-11-19 22:16:04,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 22:16:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 436 transitions. [2019-11-19 22:16:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-19 22:16:04,141 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:16:04,141 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:16:04,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:16:04,352 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:16:04,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:16:04,352 INFO L82 PathProgramCache]: Analyzing trace with hash 918133982, now seen corresponding path program 1 times [2019-11-19 22:16:04,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:16:04,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [384705117] [2019-11-19 22:16:04,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:16:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:16:04,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 22:16:04,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:16:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:04,461 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:16:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:04,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [384705117] [2019-11-19 22:16:04,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:16:04,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-19 22:16:04,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727389287] [2019-11-19 22:16:04,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 22:16:04,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:16:04,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 22:16:04,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-19 22:16:04,480 INFO L87 Difference]: Start difference. First operand 285 states and 436 transitions. Second operand 6 states. [2019-11-19 22:16:04,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:16:04,912 INFO L93 Difference]: Finished difference Result 1177 states and 1829 transitions. [2019-11-19 22:16:04,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 22:16:04,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-19 22:16:04,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:16:04,920 INFO L225 Difference]: With dead ends: 1177 [2019-11-19 22:16:04,920 INFO L226 Difference]: Without dead ends: 916 [2019-11-19 22:16:04,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-19 22:16:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2019-11-19 22:16:04,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 549. [2019-11-19 22:16:04,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 549 states. [2019-11-19 22:16:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 824 transitions. [2019-11-19 22:16:04,998 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 824 transitions. Word has length 25 [2019-11-19 22:16:04,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:16:04,998 INFO L462 AbstractCegarLoop]: Abstraction has 549 states and 824 transitions. [2019-11-19 22:16:04,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 22:16:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 824 transitions. [2019-11-19 22:16:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-19 22:16:05,008 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:16:05,009 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:16:05,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:16:05,220 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:16:05,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:16:05,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1619196567, now seen corresponding path program 1 times [2019-11-19 22:16:05,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:16:05,221 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [767973090] [2019-11-19 22:16:05,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:16:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:16:05,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 22:16:05,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:16:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:05,385 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:16:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:05,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [767973090] [2019-11-19 22:16:05,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:16:05,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-19 22:16:05,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626407683] [2019-11-19 22:16:05,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-19 22:16:05,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:16:05,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-19 22:16:05,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-19 22:16:05,465 INFO L87 Difference]: Start difference. First operand 549 states and 824 transitions. Second operand 12 states. [2019-11-19 22:16:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:16:06,272 INFO L93 Difference]: Finished difference Result 1525 states and 2337 transitions. [2019-11-19 22:16:06,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 22:16:06,273 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-19 22:16:06,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:16:06,292 INFO L225 Difference]: With dead ends: 1525 [2019-11-19 22:16:06,292 INFO L226 Difference]: Without dead ends: 1264 [2019-11-19 22:16:06,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-11-19 22:16:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2019-11-19 22:16:06,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 961. [2019-11-19 22:16:06,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2019-11-19 22:16:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1440 transitions. [2019-11-19 22:16:06,344 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1440 transitions. Word has length 27 [2019-11-19 22:16:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:16:06,345 INFO L462 AbstractCegarLoop]: Abstraction has 961 states and 1440 transitions. [2019-11-19 22:16:06,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-19 22:16:06,345 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1440 transitions. [2019-11-19 22:16:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-19 22:16:06,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:16:06,347 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:16:06,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:16:06,550 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:16:06,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:16:06,550 INFO L82 PathProgramCache]: Analyzing trace with hash -900742063, now seen corresponding path program 1 times [2019-11-19 22:16:06,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:16:06,551 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1456138240] [2019-11-19 22:16:06,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:16:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:16:06,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 22:16:06,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:16:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:06,665 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:16:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:06,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1456138240] [2019-11-19 22:16:06,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:16:06,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-19 22:16:06,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129725963] [2019-11-19 22:16:06,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 22:16:06,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:16:06,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 22:16:06,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-19 22:16:06,732 INFO L87 Difference]: Start difference. First operand 961 states and 1440 transitions. Second operand 10 states. [2019-11-19 22:16:07,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:16:07,771 INFO L93 Difference]: Finished difference Result 2173 states and 3278 transitions. [2019-11-19 22:16:07,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-19 22:16:07,771 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-19 22:16:07,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:16:07,780 INFO L225 Difference]: With dead ends: 2173 [2019-11-19 22:16:07,780 INFO L226 Difference]: Without dead ends: 1463 [2019-11-19 22:16:07,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2019-11-19 22:16:07,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2019-11-19 22:16:07,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1163. [2019-11-19 22:16:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1163 states. [2019-11-19 22:16:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1713 transitions. [2019-11-19 22:16:07,825 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1713 transitions. Word has length 30 [2019-11-19 22:16:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:16:07,826 INFO L462 AbstractCegarLoop]: Abstraction has 1163 states and 1713 transitions. [2019-11-19 22:16:07,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 22:16:07,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1713 transitions. [2019-11-19 22:16:07,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-19 22:16:07,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:16:07,829 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:16:08,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:16:08,031 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:16:08,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:16:08,031 INFO L82 PathProgramCache]: Analyzing trace with hash -342382578, now seen corresponding path program 1 times [2019-11-19 22:16:08,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:16:08,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1396882960] [2019-11-19 22:16:08,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/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 [2019-11-19 22:16:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:16:08,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 22:16:08,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:16:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:08,158 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:16:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:08,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1396882960] [2019-11-19 22:16:08,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:16:08,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-19 22:16:08,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124218849] [2019-11-19 22:16:08,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 22:16:08,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:16:08,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 22:16:08,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-19 22:16:08,216 INFO L87 Difference]: Start difference. First operand 1163 states and 1713 transitions. Second operand 10 states. [2019-11-19 22:16:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:16:09,271 INFO L93 Difference]: Finished difference Result 2526 states and 3720 transitions. [2019-11-19 22:16:09,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-19 22:16:09,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-11-19 22:16:09,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:16:09,283 INFO L225 Difference]: With dead ends: 2526 [2019-11-19 22:16:09,283 INFO L226 Difference]: Without dead ends: 1630 [2019-11-19 22:16:09,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2019-11-19 22:16:09,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2019-11-19 22:16:09,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1224. [2019-11-19 22:16:09,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1224 states. [2019-11-19 22:16:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1765 transitions. [2019-11-19 22:16:09,327 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1765 transitions. Word has length 31 [2019-11-19 22:16:09,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:16:09,329 INFO L462 AbstractCegarLoop]: Abstraction has 1224 states and 1765 transitions. [2019-11-19 22:16:09,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 22:16:09,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1765 transitions. [2019-11-19 22:16:09,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-19 22:16:09,333 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:16:09,333 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:16:09,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:16:09,535 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:16:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:16:09,535 INFO L82 PathProgramCache]: Analyzing trace with hash -610252502, now seen corresponding path program 1 times [2019-11-19 22:16:09,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:16:09,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1726958342] [2019-11-19 22:16:09,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:16:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:16:09,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 22:16:09,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:16:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:09,639 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:16:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:16:09,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1726958342] [2019-11-19 22:16:09,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:16:09,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-19 22:16:09,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070443370] [2019-11-19 22:16:09,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 22:16:09,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:16:09,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 22:16:09,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-19 22:16:09,663 INFO L87 Difference]: Start difference. First operand 1224 states and 1765 transitions. Second operand 6 states. [2019-11-19 22:16:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:16:09,977 INFO L93 Difference]: Finished difference Result 2404 states and 3583 transitions. [2019-11-19 22:16:09,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 22:16:09,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-11-19 22:16:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:16:09,990 INFO L225 Difference]: With dead ends: 2404 [2019-11-19 22:16:09,991 INFO L226 Difference]: Without dead ends: 1778 [2019-11-19 22:16:09,993 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-19 22:16:09,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2019-11-19 22:16:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1367. [2019-11-19 22:16:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1367 states. [2019-11-19 22:16:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 1983 transitions. [2019-11-19 22:16:10,038 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 1983 transitions. Word has length 32 [2019-11-19 22:16:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:16:10,038 INFO L462 AbstractCegarLoop]: Abstraction has 1367 states and 1983 transitions. [2019-11-19 22:16:10,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 22:16:10,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 1983 transitions. [2019-11-19 22:16:10,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-19 22:16:10,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:16:10,041 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:16:10,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:16:10,245 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:16:10,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:16:10,245 INFO L82 PathProgramCache]: Analyzing trace with hash 126573537, now seen corresponding path program 1 times [2019-11-19 22:16:10,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:16:10,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [414579760] [2019-11-19 22:16:10,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:16:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:16:10,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-19 22:16:10,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:16:11,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:16:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 22:16:11,625 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:16:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 22:16:13,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [414579760] [2019-11-19 22:16:13,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:16:13,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2019-11-19 22:16:13,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047700241] [2019-11-19 22:16:13,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-19 22:16:13,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:16:13,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-19 22:16:13,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2019-11-19 22:16:13,625 INFO L87 Difference]: Start difference. First operand 1367 states and 1983 transitions. Second operand 38 states. [2019-11-19 22:16:27,548 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2019-11-19 22:16:33,201 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2019-11-19 22:16:33,524 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2019-11-19 22:16:34,002 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2019-11-19 22:16:35,074 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2019-11-19 22:16:36,013 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2019-11-19 22:16:36,312 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2019-11-19 22:16:36,745 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2019-11-19 22:16:37,107 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2019-11-19 22:16:37,759 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2019-11-19 22:16:38,605 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2019-11-19 22:16:41,112 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2019-11-19 22:16:42,322 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2019-11-19 22:16:42,638 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-11-19 22:16:43,447 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2019-11-19 22:16:43,784 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2019-11-19 22:16:44,098 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2019-11-19 22:16:44,454 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2019-11-19 22:16:44,842 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2019-11-19 22:16:45,386 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 96 [2019-11-19 22:16:46,018 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2019-11-19 22:16:46,372 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 92 [2019-11-19 22:16:47,461 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2019-11-19 22:16:47,822 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 94 [2019-11-19 22:16:48,887 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2019-11-19 22:16:50,452 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2019-11-19 22:16:50,876 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2019-11-19 22:16:51,309 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2019-11-19 22:16:53,881 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2019-11-19 22:16:54,291 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2019-11-19 22:16:54,895 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2019-11-19 22:16:55,363 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2019-11-19 22:16:55,779 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2019-11-19 22:16:57,012 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 104 [2019-11-19 22:16:57,337 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2019-11-19 22:16:57,791 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2019-11-19 22:16:59,737 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2019-11-19 22:17:00,261 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2019-11-19 22:17:00,707 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2019-11-19 22:17:01,194 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2019-11-19 22:17:02,467 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 105 [2019-11-19 22:17:03,327 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2019-11-19 22:17:03,791 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2019-11-19 22:17:04,198 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2019-11-19 22:17:04,556 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2019-11-19 22:17:05,191 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2019-11-19 22:17:05,544 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2019-11-19 22:17:06,000 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2019-11-19 22:17:06,891 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2019-11-19 22:17:07,453 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2019-11-19 22:17:08,006 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2019-11-19 22:17:08,474 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2019-11-19 22:17:09,000 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 104 [2019-11-19 22:17:09,718 WARN L191 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 113 [2019-11-19 22:17:09,988 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2019-11-19 22:17:10,391 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2019-11-19 22:17:10,746 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2019-11-19 22:17:11,185 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2019-11-19 22:17:11,705 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2019-11-19 22:17:12,101 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2019-11-19 22:17:12,721 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 93 [2019-11-19 22:17:13,207 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 98 [2019-11-19 22:17:13,834 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 87 [2019-11-19 22:17:14,356 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2019-11-19 22:17:14,976 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2019-11-19 22:17:15,504 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 99 [2019-11-19 22:17:16,081 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2019-11-19 22:17:16,705 WARN L191 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2019-11-19 22:17:17,102 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2019-11-19 22:17:18,200 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2019-11-19 22:17:18,452 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2019-11-19 22:17:19,022 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 107 [2019-11-19 22:17:19,525 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2019-11-19 22:17:19,999 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2019-11-19 22:17:20,658 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 96 [2019-11-19 22:17:21,230 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2019-11-19 22:17:22,012 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2019-11-19 22:17:22,537 WARN L191 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 116 [2019-11-19 22:17:22,794 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2019-11-19 22:17:23,376 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 109 [2019-11-19 22:17:23,843 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2019-11-19 22:17:24,523 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2019-11-19 22:17:25,119 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2019-11-19 22:17:26,124 WARN L191 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 113 [2019-11-19 22:17:26,707 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2019-11-19 22:17:27,756 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 102 [2019-11-19 22:17:28,475 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2019-11-19 22:17:28,889 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2019-11-19 22:17:29,588 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2019-11-19 22:17:30,100 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 96 [2019-11-19 22:17:30,570 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2019-11-19 22:17:30,990 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2019-11-19 22:17:31,789 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 115 [2019-11-19 22:17:32,098 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2019-11-19 22:17:32,968 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2019-11-19 22:17:33,233 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2019-11-19 22:17:33,791 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 97 [2019-11-19 22:17:34,383 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2019-11-19 22:17:34,968 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 103 [2019-11-19 22:17:35,486 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2019-11-19 22:17:36,622 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 91 [2019-11-19 22:17:37,136 WARN L191 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 119 [2019-11-19 22:17:37,626 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 105 [2019-11-19 22:17:38,244 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2019-11-19 22:17:38,871 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 92 [2019-11-19 22:17:39,596 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2019-11-19 22:17:40,203 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2019-11-19 22:17:40,547 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2019-11-19 22:17:41,201 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 107 [2019-11-19 22:17:41,675 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2019-11-19 22:17:42,073 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2019-11-19 22:17:42,971 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 111 [2019-11-19 22:17:43,472 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 100 [2019-11-19 22:17:44,022 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 106 [2019-11-19 22:17:44,797 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 118 [2019-11-19 22:17:45,271 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2019-11-19 22:17:45,687 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 96 [2019-11-19 22:17:46,236 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2019-11-19 22:17:46,926 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2019-11-19 22:17:47,400 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2019-11-19 22:17:48,018 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2019-11-19 22:17:48,430 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 100 [2019-11-19 22:17:49,130 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 94 [2019-11-19 22:17:49,845 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 103 [2019-11-19 22:17:50,420 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 109 [2019-11-19 22:17:51,011 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 96 [2019-11-19 22:17:51,704 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2019-11-19 22:17:52,337 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 98 [2019-11-19 22:17:52,929 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 100 [2019-11-19 22:17:53,533 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2019-11-19 22:17:54,083 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 105 [2019-11-19 22:17:54,644 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 111 [2019-11-19 22:17:55,222 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 109 [2019-11-19 22:17:55,797 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 115 [2019-11-19 22:17:56,453 WARN L191 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 104 [2019-11-19 22:17:56,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:17:56,508 INFO L93 Difference]: Finished difference Result 10750 states and 15411 transitions. [2019-11-19 22:17:56,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2019-11-19 22:17:56,508 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 50 [2019-11-19 22:17:56,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:17:56,555 INFO L225 Difference]: With dead ends: 10750 [2019-11-19 22:17:56,556 INFO L226 Difference]: Without dead ends: 10475 [2019-11-19 22:17:56,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34783 ImplicationChecksByTransitivity, 85.7s TimeCoverageRelationStatistics Valid=20899, Invalid=73043, Unknown=0, NotChecked=0, Total=93942 [2019-11-19 22:17:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10475 states. [2019-11-19 22:17:56,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10475 to 5617. [2019-11-19 22:17:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5617 states. [2019-11-19 22:17:56,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5617 states to 5617 states and 8308 transitions. [2019-11-19 22:17:56,933 INFO L78 Accepts]: Start accepts. Automaton has 5617 states and 8308 transitions. Word has length 50 [2019-11-19 22:17:56,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:17:56,935 INFO L462 AbstractCegarLoop]: Abstraction has 5617 states and 8308 transitions. [2019-11-19 22:17:56,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-19 22:17:56,935 INFO L276 IsEmpty]: Start isEmpty. Operand 5617 states and 8308 transitions. [2019-11-19 22:17:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-19 22:17:56,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:17:56,939 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:17:57,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:17:57,143 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:17:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:17:57,144 INFO L82 PathProgramCache]: Analyzing trace with hash -884543713, now seen corresponding path program 1 times [2019-11-19 22:17:57,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:17:57,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1599333601] [2019-11-19 22:17:57,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:17:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:17:57,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 22:17:57,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:17:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-19 22:17:57,306 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:17:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-19 22:17:57,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1599333601] [2019-11-19 22:17:57,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:17:57,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-11-19 22:17:57,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027269546] [2019-11-19 22:17:57,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 22:17:57,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:17:57,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 22:17:57,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-19 22:17:57,350 INFO L87 Difference]: Start difference. First operand 5617 states and 8308 transitions. Second operand 8 states. [2019-11-19 22:17:58,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:17:58,432 INFO L93 Difference]: Finished difference Result 11601 states and 17096 transitions. [2019-11-19 22:17:58,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-19 22:17:58,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2019-11-19 22:17:58,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:17:58,468 INFO L225 Difference]: With dead ends: 11601 [2019-11-19 22:17:58,468 INFO L226 Difference]: Without dead ends: 5977 [2019-11-19 22:17:58,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-11-19 22:17:58,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5977 states. [2019-11-19 22:17:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5977 to 5118. [2019-11-19 22:17:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5118 states. [2019-11-19 22:17:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5118 states to 5118 states and 7198 transitions. [2019-11-19 22:17:58,675 INFO L78 Accepts]: Start accepts. Automaton has 5118 states and 7198 transitions. Word has length 50 [2019-11-19 22:17:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:17:58,676 INFO L462 AbstractCegarLoop]: Abstraction has 5118 states and 7198 transitions. [2019-11-19 22:17:58,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 22:17:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 5118 states and 7198 transitions. [2019-11-19 22:17:58,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-19 22:17:58,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:17:58,679 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:17:58,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:17:58,885 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:17:58,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:17:58,886 INFO L82 PathProgramCache]: Analyzing trace with hash 103941283, now seen corresponding path program 1 times [2019-11-19 22:17:58,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:17:58,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1717135075] [2019-11-19 22:17:58,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:17:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:17:58,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:17:58,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:17:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-19 22:17:58,969 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:17:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-19 22:17:58,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1717135075] [2019-11-19 22:17:58,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:17:58,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-19 22:17:58,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430092764] [2019-11-19 22:17:58,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 22:17:58,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:17:58,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 22:17:58,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 22:17:58,982 INFO L87 Difference]: Start difference. First operand 5118 states and 7198 transitions. Second operand 4 states. [2019-11-19 22:17:59,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:17:59,123 INFO L93 Difference]: Finished difference Result 5997 states and 8294 transitions. [2019-11-19 22:17:59,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 22:17:59,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-11-19 22:17:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:17:59,157 INFO L225 Difference]: With dead ends: 5997 [2019-11-19 22:17:59,159 INFO L226 Difference]: Without dead ends: 5942 [2019-11-19 22:17:59,167 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 22:17:59,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2019-11-19 22:17:59,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 5401. [2019-11-19 22:17:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5401 states. [2019-11-19 22:17:59,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5401 states to 5401 states and 7566 transitions. [2019-11-19 22:17:59,357 INFO L78 Accepts]: Start accepts. Automaton has 5401 states and 7566 transitions. Word has length 50 [2019-11-19 22:17:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:17:59,358 INFO L462 AbstractCegarLoop]: Abstraction has 5401 states and 7566 transitions. [2019-11-19 22:17:59,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 22:17:59,358 INFO L276 IsEmpty]: Start isEmpty. Operand 5401 states and 7566 transitions. [2019-11-19 22:17:59,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-19 22:17:59,361 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:17:59,361 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:17:59,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:17:59,571 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 22:17:59,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:17:59,572 INFO L82 PathProgramCache]: Analyzing trace with hash 928939180, now seen corresponding path program 1 times [2019-11-19 22:17:59,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:17:59,572 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1166244025] [2019-11-19 22:17:59,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:17:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:17:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:17:59,770 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-19 22:17:59,770 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 22:17:59,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:18:00,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 10:18:00 BoogieIcfgContainer [2019-11-19 22:18:00,034 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 22:18:00,035 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 22:18:00,035 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 22:18:00,035 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 22:18:00,036 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:16:00" (3/4) ... [2019-11-19 22:18:00,039 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 22:18:00,117 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_28bb7f83-256e-47f3-b708-8794b74673b3/bin/uautomizer/witness.graphml [2019-11-19 22:18:00,117 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 22:18:00,119 INFO L168 Benchmark]: Toolchain (without parser) took 120738.70 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 511.2 MB). Free memory was 961.8 MB in the beginning and 886.0 MB in the end (delta: 75.8 MB). Peak memory consumption was 586.9 MB. Max. memory is 11.5 GB. [2019-11-19 22:18:00,119 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:18:00,120 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.44 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 945.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2019-11-19 22:18:00,120 INFO L168 Benchmark]: Boogie Procedure Inliner took 152.80 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -172.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-19 22:18:00,121 INFO L168 Benchmark]: Boogie Preprocessor took 52.98 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:18:00,121 INFO L168 Benchmark]: RCFGBuilder took 496.16 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: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:18:00,122 INFO L168 Benchmark]: TraceAbstraction took 119611.27 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 383.3 MB). Free memory was 1.1 GB in the beginning and 899.8 MB in the end (delta: 191.1 MB). Peak memory consumption was 574.3 MB. Max. memory is 11.5 GB. [2019-11-19 22:18:00,123 INFO L168 Benchmark]: Witness Printer took 82.79 ms. Allocated memory is still 1.5 GB. Free memory was 899.8 MB in the beginning and 886.0 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 11.5 GB. [2019-11-19 22:18:00,125 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 331.44 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 945.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 152.80 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -172.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 52.98 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 496.16 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: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 119611.27 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 383.3 MB). Free memory was 1.1 GB in the beginning and 899.8 MB in the end (delta: 191.1 MB). Peak memory consumption was 574.3 MB. Max. memory is 11.5 GB. * Witness Printer took 82.79 ms. Allocated memory is still 1.5 GB. Free memory was 899.8 MB in the beginning and 886.0 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L105] unsigned int a, b, r; [L107] a = __VERIFIER_nondet_uint() [L108] b = __VERIFIER_nondet_uint() [L23] unsigned char a0, a1, a2, a3; [L24] unsigned char b0, b1, b2, b3; [L25] unsigned char r0, r1, r2, r3; [L26] unsigned short carry; [L27] unsigned short partial_sum; [L28] unsigned int r; [L29] unsigned char i; [L30] unsigned char na, nb; [L31] a0 = a [L32] a1 = a >> 8 [L33] a2 = a >> 16U [L34] a3 = a >> 24U [L35] b0 = b [L36] b1 = b >> 8U [L37] b2 = b >> 16U [L38] b3 = b >> 24U [L39] na = (unsigned char)4 [L40] COND TRUE a3 == (unsigned char)0 [L41] na = na - 1 [L42] COND TRUE a2 == (unsigned char)0 [L43] na = na - 1 [L44] COND TRUE a1 == (unsigned char)0 [L45] na = na - 1 [L49] nb = (unsigned char)4 [L50] COND TRUE b3 == (unsigned char)0 [L51] nb = nb - 1 [L52] COND TRUE b2 == (unsigned char)0 [L53] nb = nb - 1 [L54] COND TRUE b1 == (unsigned char)0 [L55] nb = nb - 1 [L59] carry = (unsigned short)0 [L60] i = (unsigned char)0 [L61] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L62] partial_sum = carry [L63] carry = (unsigned short)0 [L64] COND TRUE i < na [L65] COND TRUE i == (unsigned char)0 [L65] partial_sum = partial_sum + a0 [L66] COND FALSE !(i == (unsigned char)1) [L67] COND FALSE !(i == (unsigned char)2) [L68] COND FALSE !(i == (unsigned char)3) [L70] COND TRUE i < nb [L71] COND TRUE i == (unsigned char)0 [L71] partial_sum = partial_sum + b0 [L72] COND FALSE !(i == (unsigned char)1) [L73] COND FALSE !(i == (unsigned char)2) [L74] COND FALSE !(i == (unsigned char)3) [L76] COND TRUE partial_sum > ((unsigned char)254) [L77] partial_sum = partial_sum & ((unsigned char)255) [L78] carry = (unsigned short)1 [L80] COND TRUE i == (unsigned char)0 [L80] r0 = (unsigned char)partial_sum [L81] COND FALSE !(i == (unsigned char)1) [L82] COND FALSE !(i == (unsigned char)2) [L83] COND FALSE !(i == (unsigned char)3) [L85] i = i + (unsigned char)1 [L61] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L62] partial_sum = carry [L63] carry = (unsigned short)0 [L64] COND FALSE !(i < na) [L70] COND FALSE !(i < nb) [L76] COND FALSE !(partial_sum > ((unsigned char)254)) [L80] COND FALSE !(i == (unsigned char)0) [L81] COND TRUE i == (unsigned char)1 [L81] r1 = (unsigned char)partial_sum [L82] COND FALSE !(i == (unsigned char)2) [L83] COND FALSE !(i == (unsigned char)3) [L85] i = i + (unsigned char)1 [L61] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) [L88] COND TRUE i < (unsigned char)4 [L89] COND FALSE !(i == (unsigned char)0) [L90] COND FALSE !(i == (unsigned char)1) [L91] COND TRUE i == (unsigned char)2 [L91] r2 = (unsigned char)0 [L92] COND FALSE !(i == (unsigned char)3) [L94] i = i + (unsigned char)1 [L88] COND TRUE i < (unsigned char)4 [L89] COND FALSE !(i == (unsigned char)0) [L90] COND FALSE !(i == (unsigned char)1) [L91] COND FALSE !(i == (unsigned char)2) [L92] COND TRUE i == (unsigned char)3 [L92] r3 = (unsigned char)0 [L94] i = i + (unsigned char)1 [L88] COND FALSE !(i < (unsigned char)4) [L97] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L99] return r; [L110] r = mp_add(a, b) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 1 error locations. Result: UNSAFE, OverallTime: 119.5s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 110.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1042 SDtfs, 7334 SDslu, 7200 SDs, 0 SdLazy, 15319 SolverSat, 1137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 991 GetRequests, 587 SyntacticMatches, 5 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34988 ImplicationChecksByTransitivity, 87.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5617occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 8142 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 408 NumberOfCodeBlocks, 408 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 686 ConstructedInterpolants, 0 QuantifiedInterpolants, 263687 SizeOfPredicates, 42 NumberOfNonLiveVariables, 712 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 24 InterpolantComputations, 14 PerfectInterpolantSequences, 107/144 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 incorrect! Received shutdown request...