./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_20x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d709c141e865b9e316ae50970f4a7a44b0dfd8eb ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.2.0-a4ecdab [2020-11-28 03:18:43,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:18:43,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:18:43,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:18:43,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:18:43,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:18:43,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:18:43,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:18:43,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:18:43,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:18:43,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:18:43,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:18:43,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:18:43,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:18:43,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:18:43,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:18:43,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:18:43,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:18:43,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:18:43,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:18:43,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:18:43,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:18:43,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:18:43,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:18:43,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:18:43,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:18:43,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:18:43,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:18:43,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:18:43,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:18:43,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:18:43,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:18:43,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:18:43,770 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:18:43,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:18:43,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:18:43,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:18:43,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:18:43,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:18:43,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:18:43,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:18:43,777 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:18:43,813 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:18:43,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:18:43,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:18:43,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:18:43,816 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:18:43,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:18:43,816 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:18:43,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:18:43,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:18:43,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:18:43,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:18:43,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:18:43,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:18:43,819 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:18:43,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:18:43,819 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:18:43,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:18:43,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:18:43,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:18:43,820 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:18:43,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:18:43,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:18:43,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:18:43,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:18:43,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:18:43,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:18:43,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:18:43,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:18:43,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:18:43,822 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d709c141e865b9e316ae50970f4a7a44b0dfd8eb [2020-11-28 03:18:44,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:18:44,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:18:44,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:18:44,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:18:44,103 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:18:44,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2020-11-28 03:18:44,217 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/data/a3b0f43dc/281ff29444fa42ffaaa3a29280b7d004/FLAG61b01e4ee [2020-11-28 03:18:44,624 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:18:44,624 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2020-11-28 03:18:44,629 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/data/a3b0f43dc/281ff29444fa42ffaaa3a29280b7d004/FLAG61b01e4ee [2020-11-28 03:18:45,034 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/data/a3b0f43dc/281ff29444fa42ffaaa3a29280b7d004 [2020-11-28 03:18:45,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:18:45,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:18:45,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:18:45,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:18:45,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:18:45,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:18:45" (1/1) ... [2020-11-28 03:18:45,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4caa35e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:45, skipping insertion in model container [2020-11-28 03:18:45,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:18:45" (1/1) ... [2020-11-28 03:18:45,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:18:45,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:18:45,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:18:45,247 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:18:45,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:18:45,282 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:18:45,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:45 WrapperNode [2020-11-28 03:18:45,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:18:45,284 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:18:45,284 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:18:45,284 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:18:45,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:45" (1/1) ... [2020-11-28 03:18:45,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:45" (1/1) ... [2020-11-28 03:18:45,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:18:45,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:18:45,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:18:45,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:18:45,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:45" (1/1) ... [2020-11-28 03:18:45,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:45" (1/1) ... [2020-11-28 03:18:45,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:45" (1/1) ... [2020-11-28 03:18:45,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:45" (1/1) ... [2020-11-28 03:18:45,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:45" (1/1) ... [2020-11-28 03:18:45,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:45" (1/1) ... [2020-11-28 03:18:45,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:45" (1/1) ... [2020-11-28 03:18:45,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:18:45,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:18:45,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:18:45,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:18:45,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/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 [2020-11-28 03:18:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:18:45,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:18:45,409 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-11-28 03:18:45,409 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-11-28 03:18:45,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:18:45,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:18:45,628 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:18:45,631 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 03:18:45,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:18:45 BoogieIcfgContainer [2020-11-28 03:18:45,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:18:45,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:18:45,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:18:45,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:18:45,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:18:45" (1/3) ... [2020-11-28 03:18:45,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792ba8c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:18:45, skipping insertion in model container [2020-11-28 03:18:45,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:45" (2/3) ... [2020-11-28 03:18:45,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792ba8c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:18:45, skipping insertion in model container [2020-11-28 03:18:45,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:18:45" (3/3) ... [2020-11-28 03:18:45,665 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_20x0-1.c [2020-11-28 03:18:45,676 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:18:45,680 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:18:45,692 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:18:45,717 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:18:45,718 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:18:45,718 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:18:45,718 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:18:45,718 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:18:45,718 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:18:45,718 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:18:45,719 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:18:45,733 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-28 03:18:45,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:18:45,738 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:45,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:45,739 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:45,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:45,745 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-11-28 03:18:45,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:45,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231617392] [2020-11-28 03:18:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:45,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:46,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231617392] [2020-11-28 03:18:46,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:18:46,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:18:46,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848383939] [2020-11-28 03:18:46,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:18:46,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:46,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:18:46,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:18:46,108 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-11-28 03:18:46,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:46,223 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-28 03:18:46,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:18:46,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-28 03:18:46,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:46,242 INFO L225 Difference]: With dead ends: 26 [2020-11-28 03:18:46,253 INFO L226 Difference]: Without dead ends: 15 [2020-11-28 03:18:46,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:18:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-28 03:18:46,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-28 03:18:46,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 03:18:46,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-28 03:18:46,297 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-11-28 03:18:46,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:46,298 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-28 03:18:46,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:18:46,298 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-28 03:18:46,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:18:46,300 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:46,300 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:46,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:18:46,301 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:46,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-11-28 03:18:46,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:46,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197874049] [2020-11-28 03:18:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:46,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:46,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:18:46,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197874049] [2020-11-28 03:18:46,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142626471] [2020-11-28 03:18:46,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/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 [2020-11-28 03:18:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:46,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:18:46,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:18:46,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:46,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-28 03:18:46,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974893146] [2020-11-28 03:18:46,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:18:46,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:46,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:18:46,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:18:46,640 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-11-28 03:18:46,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:46,708 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-28 03:18:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:18:46,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-11-28 03:18:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:46,711 INFO L225 Difference]: With dead ends: 22 [2020-11-28 03:18:46,711 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 03:18:46,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:18:46,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 03:18:46,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-28 03:18:46,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 03:18:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-28 03:18:46,717 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-11-28 03:18:46,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:46,720 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-28 03:18:46,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:18:46,721 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-28 03:18:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:18:46,723 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:46,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:46,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 03:18:46,930 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:46,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:46,931 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-11-28 03:18:46,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:46,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683999979] [2020-11-28 03:18:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:47,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:47,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:47,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:18:47,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683999979] [2020-11-28 03:18:47,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409821815] [2020-11-28 03:18:47,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/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 [2020-11-28 03:18:47,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:18:47,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:47,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:18:47,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:18:47,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:47,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-28 03:18:47,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246628506] [2020-11-28 03:18:47,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:18:47,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:47,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:18:47,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:18:47,273 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-11-28 03:18:47,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:47,360 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-28 03:18:47,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:18:47,360 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-11-28 03:18:47,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:47,361 INFO L225 Difference]: With dead ends: 25 [2020-11-28 03:18:47,361 INFO L226 Difference]: Without dead ends: 21 [2020-11-28 03:18:47,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:18:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-28 03:18:47,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-28 03:18:47,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 03:18:47,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-28 03:18:47,368 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-11-28 03:18:47,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:47,369 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-28 03:18:47,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:18:47,369 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-28 03:18:47,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:18:47,371 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:47,371 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:47,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:47,594 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:47,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-11-28 03:18:47,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:47,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327913731] [2020-11-28 03:18:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:47,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:47,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:47,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:47,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-28 03:18:47,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327913731] [2020-11-28 03:18:47,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834605385] [2020-11-28 03:18:47,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/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 [2020-11-28 03:18:47,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-28 03:18:47,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:47,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:18:47,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-28 03:18:47,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:47,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-28 03:18:47,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231312708] [2020-11-28 03:18:47,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:18:47,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:47,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:18:47,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:18:47,936 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-11-28 03:18:48,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:48,048 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-28 03:18:48,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:18:48,049 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-11-28 03:18:48,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:48,050 INFO L225 Difference]: With dead ends: 28 [2020-11-28 03:18:48,050 INFO L226 Difference]: Without dead ends: 24 [2020-11-28 03:18:48,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:18:48,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-28 03:18:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-28 03:18:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 03:18:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-28 03:18:48,057 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-11-28 03:18:48,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:48,058 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-28 03:18:48,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:18:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-28 03:18:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-28 03:18:48,059 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:48,059 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:48,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:48,274 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash -346978038, now seen corresponding path program 4 times [2020-11-28 03:18:48,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:48,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323713858] [2020-11-28 03:18:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:48,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:48,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:48,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:48,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:48,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-28 03:18:48,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323713858] [2020-11-28 03:18:48,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451411041] [2020-11-28 03:18:48,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/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 [2020-11-28 03:18:48,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:18:48,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:48,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:18:48,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-28 03:18:48,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:48,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-28 03:18:48,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945680783] [2020-11-28 03:18:48,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:18:48,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:48,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:18:48,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:18:48,679 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-11-28 03:18:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:48,807 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-11-28 03:18:48,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:18:48,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-11-28 03:18:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:48,809 INFO L225 Difference]: With dead ends: 31 [2020-11-28 03:18:48,809 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 03:18:48,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:18:48,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 03:18:48,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-28 03:18:48,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 03:18:48,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-28 03:18:48,815 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-11-28 03:18:48,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:48,816 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-28 03:18:48,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:18:48,816 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-28 03:18:48,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-28 03:18:48,818 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:48,818 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:49,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:49,035 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:49,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:49,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1234184620, now seen corresponding path program 5 times [2020-11-28 03:18:49,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:49,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332203907] [2020-11-28 03:18:49,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:49,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:49,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:49,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:49,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:49,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:49,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-28 03:18:49,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332203907] [2020-11-28 03:18:49,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105185278] [2020-11-28 03:18:49,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/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 [2020-11-28 03:18:49,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-28 03:18:49,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:49,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:18:49,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-28 03:18:49,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:49,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-28 03:18:49,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121754949] [2020-11-28 03:18:49,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:18:49,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:49,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:18:49,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:18:49,418 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-11-28 03:18:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:49,554 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-28 03:18:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:18:49,555 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-11-28 03:18:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:49,556 INFO L225 Difference]: With dead ends: 34 [2020-11-28 03:18:49,556 INFO L226 Difference]: Without dead ends: 30 [2020-11-28 03:18:49,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:18:49,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-28 03:18:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-28 03:18:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-28 03:18:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-28 03:18:49,563 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-11-28 03:18:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:49,564 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-28 03:18:49,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:18:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-28 03:18:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-28 03:18:49,565 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:49,566 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:49,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 03:18:49,766 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:49,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:49,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1831214410, now seen corresponding path program 6 times [2020-11-28 03:18:49,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:49,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522932428] [2020-11-28 03:18:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:49,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:49,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:49,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:49,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:49,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:49,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:49,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-28 03:18:50,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522932428] [2020-11-28 03:18:50,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336058542] [2020-11-28 03:18:50,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/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 [2020-11-28 03:18:50,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-28 03:18:50,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:50,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-28 03:18:50,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-28 03:18:50,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:50,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-28 03:18:50,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468663743] [2020-11-28 03:18:50,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:18:50,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:50,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:18:50,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:18:50,157 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-11-28 03:18:50,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:50,322 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-11-28 03:18:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:18:50,324 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-11-28 03:18:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:50,325 INFO L225 Difference]: With dead ends: 37 [2020-11-28 03:18:50,326 INFO L226 Difference]: Without dead ends: 33 [2020-11-28 03:18:50,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-11-28 03:18:50,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-28 03:18:50,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-28 03:18:50,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-28 03:18:50,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-11-28 03:18:50,332 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-11-28 03:18:50,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:50,332 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-11-28 03:18:50,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:18:50,333 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-11-28 03:18:50,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-28 03:18:50,334 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:50,334 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:50,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:50,535 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:50,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:50,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1739954964, now seen corresponding path program 7 times [2020-11-28 03:18:50,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:50,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348063710] [2020-11-28 03:18:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:50,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:50,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:50,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:50,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:50,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:50,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:50,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:50,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-28 03:18:50,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348063710] [2020-11-28 03:18:50,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942436259] [2020-11-28 03:18:50,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/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 [2020-11-28 03:18:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:50,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-28 03:18:50,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-28 03:18:50,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:50,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-28 03:18:50,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002716909] [2020-11-28 03:18:50,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 03:18:50,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:50,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:18:50,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:18:50,944 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-11-28 03:18:51,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:51,130 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-28 03:18:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:18:51,131 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-11-28 03:18:51,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:51,132 INFO L225 Difference]: With dead ends: 40 [2020-11-28 03:18:51,132 INFO L226 Difference]: Without dead ends: 36 [2020-11-28 03:18:51,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-11-28 03:18:51,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-28 03:18:51,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-28 03:18:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-28 03:18:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-11-28 03:18:51,139 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-11-28 03:18:51,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:51,140 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-11-28 03:18:51,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 03:18:51,140 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-11-28 03:18:51,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-28 03:18:51,141 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:51,142 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:51,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:51,362 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:51,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:51,363 INFO L82 PathProgramCache]: Analyzing trace with hash -632151670, now seen corresponding path program 8 times [2020-11-28 03:18:51,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:51,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269684810] [2020-11-28 03:18:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:51,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:51,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:51,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:51,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:51,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:51,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:51,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:51,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:51,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 03:18:51,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269684810] [2020-11-28 03:18:51,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173762788] [2020-11-28 03:18:51,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/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 [2020-11-28 03:18:51,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:18:51,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:51,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:18:51,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-28 03:18:51,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:51,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-28 03:18:51,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530544523] [2020-11-28 03:18:51,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 03:18:51,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:51,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:18:51,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:18:51,897 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-11-28 03:18:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:52,091 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-11-28 03:18:52,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:18:52,091 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-11-28 03:18:52,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:52,093 INFO L225 Difference]: With dead ends: 43 [2020-11-28 03:18:52,093 INFO L226 Difference]: Without dead ends: 39 [2020-11-28 03:18:52,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-11-28 03:18:52,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-28 03:18:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-28 03:18:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 03:18:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-11-28 03:18:52,103 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-11-28 03:18:52,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:52,104 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-11-28 03:18:52,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 03:18:52,104 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-11-28 03:18:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-28 03:18:52,108 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:52,108 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:52,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-28 03:18:52,330 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:52,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:52,331 INFO L82 PathProgramCache]: Analyzing trace with hash 764702676, now seen corresponding path program 9 times [2020-11-28 03:18:52,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:52,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015203426] [2020-11-28 03:18:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:52,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:52,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:52,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:52,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:52,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:52,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:52,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:52,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:52,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:52,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-28 03:18:52,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015203426] [2020-11-28 03:18:52,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102107980] [2020-11-28 03:18:52,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/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 [2020-11-28 03:18:52,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-28 03:18:52,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:52,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-28 03:18:52,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-28 03:18:52,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:52,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-28 03:18:52,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139320018] [2020-11-28 03:18:52,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-28 03:18:52,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:52,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-28 03:18:52,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:18:52,867 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-11-28 03:18:53,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:53,052 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-11-28 03:18:53,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-28 03:18:53,052 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-11-28 03:18:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:53,054 INFO L225 Difference]: With dead ends: 46 [2020-11-28 03:18:53,054 INFO L226 Difference]: Without dead ends: 42 [2020-11-28 03:18:53,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-11-28 03:18:53,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-28 03:18:53,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-28 03:18:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 03:18:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-11-28 03:18:53,060 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-11-28 03:18:53,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:53,060 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-11-28 03:18:53,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-28 03:18:53,060 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-11-28 03:18:53,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-28 03:18:53,061 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:53,067 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:53,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:53,268 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:53,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:53,268 INFO L82 PathProgramCache]: Analyzing trace with hash 554800586, now seen corresponding path program 10 times [2020-11-28 03:18:53,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:53,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10391521] [2020-11-28 03:18:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:53,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:53,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:53,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:53,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:53,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:53,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:53,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:53,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:53,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:53,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:53,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-28 03:18:53,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10391521] [2020-11-28 03:18:53,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624174604] [2020-11-28 03:18:53,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:53,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:18:53,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:53,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-28 03:18:53,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-28 03:18:53,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:53,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-28 03:18:53,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949365068] [2020-11-28 03:18:53,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-28 03:18:53,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:53,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-28 03:18:53,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:18:53,804 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-11-28 03:18:54,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:54,036 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-11-28 03:18:54,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:18:54,037 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-11-28 03:18:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:54,038 INFO L225 Difference]: With dead ends: 49 [2020-11-28 03:18:54,038 INFO L226 Difference]: Without dead ends: 45 [2020-11-28 03:18:54,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-11-28 03:18:54,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-28 03:18:54,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-28 03:18:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 03:18:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-11-28 03:18:54,049 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-11-28 03:18:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:54,049 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-11-28 03:18:54,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-28 03:18:54,050 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-11-28 03:18:54,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-28 03:18:54,054 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:54,054 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:54,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:54,278 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:54,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1164946284, now seen corresponding path program 11 times [2020-11-28 03:18:54,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:54,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888004582] [2020-11-28 03:18:54,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:54,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:54,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:54,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:54,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:54,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:54,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:54,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:54,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:54,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:54,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:54,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:54,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-28 03:18:54,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888004582] [2020-11-28 03:18:54,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154385357] [2020-11-28 03:18:54,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:54,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-28 03:18:54,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:54,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-28 03:18:54,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-28 03:18:54,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:54,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-28 03:18:54,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116092550] [2020-11-28 03:18:54,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-28 03:18:54,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:54,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-28 03:18:54,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:18:54,935 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-11-28 03:18:55,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:55,180 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-11-28 03:18:55,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 03:18:55,181 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-11-28 03:18:55,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:55,182 INFO L225 Difference]: With dead ends: 52 [2020-11-28 03:18:55,182 INFO L226 Difference]: Without dead ends: 48 [2020-11-28 03:18:55,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-11-28 03:18:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-28 03:18:55,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-11-28 03:18:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-28 03:18:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-11-28 03:18:55,189 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-11-28 03:18:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:55,189 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-11-28 03:18:55,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-28 03:18:55,189 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-11-28 03:18:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-28 03:18:55,193 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:55,193 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:55,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 03:18:55,394 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:55,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:55,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1163888118, now seen corresponding path program 12 times [2020-11-28 03:18:55,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:55,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928849792] [2020-11-28 03:18:55,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:55,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:55,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:55,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:55,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:55,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:55,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:55,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:55,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:55,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:55,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:55,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:55,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:55,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-11-28 03:18:55,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928849792] [2020-11-28 03:18:55,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73288731] [2020-11-28 03:18:55,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:55,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-28 03:18:55,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:55,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-28 03:18:55,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-11-28 03:18:56,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:56,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-28 03:18:56,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713107099] [2020-11-28 03:18:56,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-28 03:18:56,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:56,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-28 03:18:56,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:18:56,029 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-11-28 03:18:56,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:56,280 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-11-28 03:18:56,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-28 03:18:56,280 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-11-28 03:18:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:56,281 INFO L225 Difference]: With dead ends: 55 [2020-11-28 03:18:56,281 INFO L226 Difference]: Without dead ends: 51 [2020-11-28 03:18:56,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-11-28 03:18:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-28 03:18:56,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-28 03:18:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-28 03:18:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-11-28 03:18:56,288 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-11-28 03:18:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:56,288 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-11-28 03:18:56,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-28 03:18:56,288 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-11-28 03:18:56,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-28 03:18:56,289 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:56,289 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:56,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-28 03:18:56,505 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:56,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:56,506 INFO L82 PathProgramCache]: Analyzing trace with hash -164804268, now seen corresponding path program 13 times [2020-11-28 03:18:56,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:56,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407397760] [2020-11-28 03:18:56,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:56,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:56,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:56,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:56,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:56,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:56,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:56,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:56,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:56,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:56,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:56,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:56,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:56,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:56,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-11-28 03:18:57,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407397760] [2020-11-28 03:18:57,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997583465] [2020-11-28 03:18:57,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:57,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-28 03:18:57,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-11-28 03:18:57,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:57,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-28 03:18:57,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510167118] [2020-11-28 03:18:57,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-28 03:18:57,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:57,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-28 03:18:57,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-11-28 03:18:57,217 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-11-28 03:18:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:57,444 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-11-28 03:18:57,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-28 03:18:57,444 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2020-11-28 03:18:57,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:57,445 INFO L225 Difference]: With dead ends: 58 [2020-11-28 03:18:57,445 INFO L226 Difference]: Without dead ends: 54 [2020-11-28 03:18:57,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-11-28 03:18:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-28 03:18:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-28 03:18:57,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 03:18:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-11-28 03:18:57,452 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-11-28 03:18:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:57,453 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-11-28 03:18:57,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-28 03:18:57,453 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-11-28 03:18:57,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-28 03:18:57,454 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:57,454 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:57,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-28 03:18:57,674 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:57,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:57,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1799016010, now seen corresponding path program 14 times [2020-11-28 03:18:57,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:57,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191736154] [2020-11-28 03:18:57,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:57,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:57,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:57,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:57,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:57,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:57,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:57,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:57,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:57,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:58,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:58,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:58,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:58,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:58,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:58,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-11-28 03:18:58,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191736154] [2020-11-28 03:18:58,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601720462] [2020-11-28 03:18:58,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:58,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:18:58,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:58,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-28 03:18:58,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-11-28 03:18:58,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:58,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-28 03:18:58,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481345382] [2020-11-28 03:18:58,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-28 03:18:58,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:58,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-28 03:18:58,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-11-28 03:18:58,406 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-11-28 03:18:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:58,683 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-11-28 03:18:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-28 03:18:58,683 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-11-28 03:18:58,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:58,684 INFO L225 Difference]: With dead ends: 61 [2020-11-28 03:18:58,684 INFO L226 Difference]: Without dead ends: 57 [2020-11-28 03:18:58,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-11-28 03:18:58,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-28 03:18:58,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-11-28 03:18:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-28 03:18:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-11-28 03:18:58,695 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-11-28 03:18:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:58,696 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-11-28 03:18:58,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-28 03:18:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-11-28 03:18:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-28 03:18:58,697 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:58,698 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:58,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:58,910 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:18:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:58,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1022316052, now seen corresponding path program 15 times [2020-11-28 03:18:58,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:58,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600299589] [2020-11-28 03:18:58,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:58,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:18:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-11-28 03:18:59,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600299589] [2020-11-28 03:18:59,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736241876] [2020-11-28 03:18:59,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:59,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-28 03:18:59,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:59,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-28 03:18:59,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-11-28 03:18:59,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:59,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-28 03:18:59,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079524840] [2020-11-28 03:18:59,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-28 03:18:59,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:59,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-28 03:18:59,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-11-28 03:18:59,786 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-11-28 03:19:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:00,073 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-11-28 03:19:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-28 03:19:00,074 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-11-28 03:19:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:00,075 INFO L225 Difference]: With dead ends: 64 [2020-11-28 03:19:00,075 INFO L226 Difference]: Without dead ends: 60 [2020-11-28 03:19:00,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-11-28 03:19:00,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-28 03:19:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-11-28 03:19:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-28 03:19:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-11-28 03:19:00,082 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2020-11-28 03:19:00,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:00,082 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-11-28 03:19:00,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-28 03:19:00,083 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-11-28 03:19:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-28 03:19:00,084 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:00,084 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:19:00,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-28 03:19:00,302 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:19:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:00,302 INFO L82 PathProgramCache]: Analyzing trace with hash 35426954, now seen corresponding path program 16 times [2020-11-28 03:19:00,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:00,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665279604] [2020-11-28 03:19:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-11-28 03:19:00,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665279604] [2020-11-28 03:19:00,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517197976] [2020-11-28 03:19:00,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:19:01,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:19:01,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:19:01,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-28 03:19:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:19:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-11-28 03:19:01,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:19:01,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-28 03:19:01,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185796435] [2020-11-28 03:19:01,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-28 03:19:01,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:01,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-28 03:19:01,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-11-28 03:19:01,183 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-11-28 03:19:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:01,508 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-11-28 03:19:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-28 03:19:01,509 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-11-28 03:19:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:01,510 INFO L225 Difference]: With dead ends: 67 [2020-11-28 03:19:01,510 INFO L226 Difference]: Without dead ends: 63 [2020-11-28 03:19:01,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2020-11-28 03:19:01,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-28 03:19:01,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-28 03:19:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-28 03:19:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-11-28 03:19:01,517 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2020-11-28 03:19:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:01,518 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-11-28 03:19:01,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-28 03:19:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-11-28 03:19:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-28 03:19:01,519 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:01,519 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:19:01,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-28 03:19:01,746 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:19:01,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:01,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1604689196, now seen corresponding path program 17 times [2020-11-28 03:19:01,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:01,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532509850] [2020-11-28 03:19:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:01,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:01,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:01,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:01,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:01,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:02,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:02,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:02,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:02,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:02,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:02,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:02,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:02,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:02,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:02,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:02,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:02,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:02,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-11-28 03:19:02,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532509850] [2020-11-28 03:19:02,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508758199] [2020-11-28 03:19:02,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:19:02,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-28 03:19:02,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:19:02,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-28 03:19:02,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:19:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-11-28 03:19:02,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:19:02,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-28 03:19:02,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124708159] [2020-11-28 03:19:02,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-28 03:19:02,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:02,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-28 03:19:02,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-11-28 03:19:02,779 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-11-28 03:19:03,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:03,092 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-11-28 03:19:03,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-28 03:19:03,092 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-11-28 03:19:03,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:03,093 INFO L225 Difference]: With dead ends: 70 [2020-11-28 03:19:03,093 INFO L226 Difference]: Without dead ends: 66 [2020-11-28 03:19:03,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2020-11-28 03:19:03,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-28 03:19:03,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-11-28 03:19:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-28 03:19:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-11-28 03:19:03,099 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2020-11-28 03:19:03,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:03,099 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-11-28 03:19:03,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-28 03:19:03,099 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-11-28 03:19:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-11-28 03:19:03,100 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:03,100 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:19:03,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-28 03:19:03,301 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:19:03,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:03,301 INFO L82 PathProgramCache]: Analyzing trace with hash 427935434, now seen corresponding path program 18 times [2020-11-28 03:19:03,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:03,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882159434] [2020-11-28 03:19:03,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:03,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-11-28 03:19:04,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882159434] [2020-11-28 03:19:04,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078975542] [2020-11-28 03:19:04,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:19:04,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-28 03:19:04,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:19:04,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 80 conjunts are in the unsatisfiable core [2020-11-28 03:19:04,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:19:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-11-28 03:19:06,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:19:06,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 43] total 63 [2020-11-28 03:19:06,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895705873] [2020-11-28 03:19:06,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-28 03:19:06,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:06,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-28 03:19:06,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=3286, Unknown=0, NotChecked=0, Total=3906 [2020-11-28 03:19:06,014 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 63 states. [2020-11-28 03:19:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:07,572 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-11-28 03:19:07,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-28 03:19:07,572 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 118 [2020-11-28 03:19:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:07,573 INFO L225 Difference]: With dead ends: 73 [2020-11-28 03:19:07,573 INFO L226 Difference]: Without dead ends: 69 [2020-11-28 03:19:07,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1855, Invalid=8245, Unknown=0, NotChecked=0, Total=10100 [2020-11-28 03:19:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-28 03:19:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-11-28 03:19:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-28 03:19:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-11-28 03:19:07,583 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2020-11-28 03:19:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:07,584 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-11-28 03:19:07,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-28 03:19:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-11-28 03:19:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-11-28 03:19:07,585 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:07,586 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:19:07,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:19:07,810 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:19:07,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:07,810 INFO L82 PathProgramCache]: Analyzing trace with hash 653428628, now seen corresponding path program 19 times [2020-11-28 03:19:07,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:07,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327496319] [2020-11-28 03:19:07,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:07,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:07,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:07,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:19:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-11-28 03:19:08,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327496319] [2020-11-28 03:19:08,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424284160] [2020-11-28 03:19:08,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:19:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:08,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-28 03:19:08,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:19:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-11-28 03:19:08,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:19:08,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-28 03:19:08,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627581949] [2020-11-28 03:19:08,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-28 03:19:08,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:08,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-28 03:19:08,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-11-28 03:19:08,967 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 25 states. [2020-11-28 03:19:09,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:09,336 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-11-28 03:19:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-28 03:19:09,336 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 124 [2020-11-28 03:19:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:09,338 INFO L225 Difference]: With dead ends: 76 [2020-11-28 03:19:09,338 INFO L226 Difference]: Without dead ends: 72 [2020-11-28 03:19:09,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2020-11-28 03:19:09,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-28 03:19:09,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-11-28 03:19:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-28 03:19:09,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-11-28 03:19:09,344 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2020-11-28 03:19:09,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:09,344 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-11-28 03:19:09,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-28 03:19:09,344 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-11-28 03:19:09,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-28 03:19:09,348 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:09,348 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:19:09,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:19:09,549 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:19:09,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:09,549 INFO L82 PathProgramCache]: Analyzing trace with hash -693736694, now seen corresponding path program 20 times [2020-11-28 03:19:09,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:09,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088931011] [2020-11-28 03:19:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:19:09,589 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:19:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:19:09,629 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:19:09,669 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:19:09,669 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:19:09,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-28 03:19:09,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:19:09 BoogieIcfgContainer [2020-11-28 03:19:09,791 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:19:09,792 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:19:09,792 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:19:09,792 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:19:09,793 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:18:45" (3/4) ... [2020-11-28 03:19:09,795 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:19:09,886 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_94fb70c9-ce08-4ed0-9645-60dca162ddc5/bin/uautomizer/witness.graphml [2020-11-28 03:19:09,887 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:19:09,888 INFO L168 Benchmark]: Toolchain (without parser) took 24839.32 ms. Allocated memory was 111.1 MB in the beginning and 360.7 MB in the end (delta: 249.6 MB). Free memory was 78.7 MB in the beginning and 326.3 MB in the end (delta: -247.6 MB). Peak memory consumption was 1.3 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:09,889 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 75.5 MB. Free memory was 35.5 MB in the beginning and 35.4 MB in the end (delta: 38.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:19:09,889 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.05 ms. Allocated memory is still 111.1 MB. Free memory was 78.5 MB in the beginning and 89.1 MB in the end (delta: -10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:09,889 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.28 ms. Allocated memory is still 111.1 MB. Free memory was 89.1 MB in the beginning and 87.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:19:09,890 INFO L168 Benchmark]: Boogie Preprocessor took 17.44 ms. Allocated memory is still 111.1 MB. Free memory was 87.4 MB in the beginning and 86.4 MB in the end (delta: 982.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:09,890 INFO L168 Benchmark]: RCFGBuilder took 298.37 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 75.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:09,891 INFO L168 Benchmark]: TraceAbstraction took 24146.96 ms. Allocated memory was 111.1 MB in the beginning and 360.7 MB in the end (delta: 249.6 MB). Free memory was 74.8 MB in the beginning and 332.6 MB in the end (delta: -257.8 MB). Peak memory consumption was 205.3 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:09,891 INFO L168 Benchmark]: Witness Printer took 95.07 ms. Allocated memory is still 360.7 MB. Free memory was 332.6 MB in the beginning and 326.3 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:09,893 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 75.5 MB. Free memory was 35.5 MB in the beginning and 35.4 MB in the end (delta: 38.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 231.05 ms. Allocated memory is still 111.1 MB. Free memory was 78.5 MB in the beginning and 89.1 MB in the end (delta: -10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.28 ms. Allocated memory is still 111.1 MB. Free memory was 89.1 MB in the beginning and 87.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.44 ms. Allocated memory is still 111.1 MB. Free memory was 87.4 MB in the beginning and 86.4 MB in the end (delta: 982.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 298.37 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 75.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 24146.96 ms. Allocated memory was 111.1 MB in the beginning and 360.7 MB in the end (delta: 249.6 MB). Free memory was 74.8 MB in the beginning and 332.6 MB in the end (delta: -257.8 MB). Peak memory consumption was 205.3 MB. Max. memory is 16.1 GB. * Witness Printer took 95.07 ms. Allocated memory is still 360.7 MB. Free memory was 332.6 MB in the beginning and 326.3 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int a = 20; [L15] int b = 0; [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=20] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=20, m=0, n=20] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=19, m=1, n=19] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=18, m=2, n=18] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=17, m=3, n=17] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=16, m=4, n=16] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=15, m=5, n=15] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=14, m=6, n=14] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=13, m=7, n=13] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=12, m=8, n=12] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=11, m=9, n=11] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=10, m=10, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=9, m=11, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=8, m=12, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=7, m=13, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=6, m=14, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=5, m=15, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=4, m=16, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=3, m=17, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=2, m=18, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=1, m=19, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=20, \old(n)=0, \result=20, m=20, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1, m=19, n=1, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2, m=18, n=2, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3, m=17, n=3, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4, m=16, n=4, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5, m=15, n=5, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6, m=14, n=6, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7, m=13, n=7, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8, m=12, n=8, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9, m=11, n=9, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10, m=10, n=10, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11, m=9, n=11, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12, m=8, n=12, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13, m=7, n=13, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14, m=6, n=14, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15, m=5, n=15, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16, m=4, n=16, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17, m=3, n=17, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18, m=2, n=18, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19, m=1, n=19, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=20, m=0, n=20, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L3] __assert_fail("0", "sum_20x0-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.9s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 181 SDtfs, 740 SDslu, 914 SDs, 0 SdLazy, 987 SolverSat, 237 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2230 GetRequests, 1693 SyntacticMatches, 0 SemanticMatches, 537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4480 ImplicationChecksByTransitivity, 9.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 2800 NumberOfCodeBlocks, 2800 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2631 ConstructedInterpolants, 0 QuantifiedInterpolants, 588195 SizeOfPredicates, 231 NumberOfNonLiveVariables, 4522 ConjunctsInSsa, 496 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...