./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/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 990c50250359c7452ab1ceec7da37e6f04bc6511 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-69874e2 [2020-12-01 14:58:25,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 14:58:25,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 14:58:25,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 14:58:25,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 14:58:25,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 14:58:25,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 14:58:25,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 14:58:25,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 14:58:25,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 14:58:25,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 14:58:25,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 14:58:25,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 14:58:25,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 14:58:25,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 14:58:25,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 14:58:25,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 14:58:25,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 14:58:25,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 14:58:25,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 14:58:25,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 14:58:25,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 14:58:25,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 14:58:25,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 14:58:25,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 14:58:25,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 14:58:25,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 14:58:25,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 14:58:25,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 14:58:25,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 14:58:25,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 14:58:25,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 14:58:25,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 14:58:25,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 14:58:25,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 14:58:25,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 14:58:25,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 14:58:25,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 14:58:25,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 14:58:25,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 14:58:25,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 14:58:25,825 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 14:58:25,858 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 14:58:25,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 14:58:25,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 14:58:25,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 14:58:25,861 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 14:58:25,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 14:58:25,862 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 14:58:25,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 14:58:25,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 14:58:25,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 14:58:25,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 14:58:25,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 14:58:25,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 14:58:25,866 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 14:58:25,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 14:58:25,867 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 14:58:25,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 14:58:25,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 14:58:25,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 14:58:25,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 14:58:25,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 14:58:25,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 14:58:25,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 14:58:25,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 14:58:25,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 14:58:25,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 14:58:25,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 14:58:25,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 14:58:25,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 14:58:25,872 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_da182cd5-b590-4f3a-9b93-0152026e992a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 990c50250359c7452ab1ceec7da37e6f04bc6511 [2020-12-01 14:58:26,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 14:58:26,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 14:58:26,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 14:58:26,209 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 14:58:26,211 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 14:58:26,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c [2020-12-01 14:58:26,297 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/bin/uautomizer/data/dca20b7d0/fc7ad6409c5649989ed5ef2d4b87d1d5/FLAGf238a7443 [2020-12-01 14:58:26,870 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 14:58:26,870 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c [2020-12-01 14:58:26,877 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/bin/uautomizer/data/dca20b7d0/fc7ad6409c5649989ed5ef2d4b87d1d5/FLAGf238a7443 [2020-12-01 14:58:27,243 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/bin/uautomizer/data/dca20b7d0/fc7ad6409c5649989ed5ef2d4b87d1d5 [2020-12-01 14:58:27,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 14:58:27,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 14:58:27,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 14:58:27,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 14:58:27,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 14:58:27,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:58:27" (1/1) ... [2020-12-01 14:58:27,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7983116d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:58:27, skipping insertion in model container [2020-12-01 14:58:27,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:58:27" (1/1) ... [2020-12-01 14:58:27,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 14:58:27,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 14:58:27,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 14:58:27,527 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 14:58:27,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 14:58:27,580 INFO L208 MainTranslator]: Completed translation [2020-12-01 14:58:27,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:58:27 WrapperNode [2020-12-01 14:58:27,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 14:58:27,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 14:58:27,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 14:58:27,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 14:58:27,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:58:27" (1/1) ... [2020-12-01 14:58:27,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:58:27" (1/1) ... [2020-12-01 14:58:27,626 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 14:58:27,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 14:58:27,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 14:58:27,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 14:58:27,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:58:27" (1/1) ... [2020-12-01 14:58:27,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:58:27" (1/1) ... [2020-12-01 14:58:27,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:58:27" (1/1) ... [2020-12-01 14:58:27,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:58:27" (1/1) ... [2020-12-01 14:58:27,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:58:27" (1/1) ... [2020-12-01 14:58:27,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:58:27" (1/1) ... [2020-12-01 14:58:27,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:58:27" (1/1) ... [2020-12-01 14:58:27,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 14:58:27,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 14:58:27,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 14:58:27,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 14:58:27,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:58:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/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 [2020-12-01 14:58:27,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 14:58:27,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 14:58:27,767 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-12-01 14:58:27,768 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-12-01 14:58:27,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 14:58:27,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 14:58:27,769 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-12-01 14:58:27,769 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-12-01 14:58:28,003 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 14:58:28,004 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-01 14:58:28,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:58:28 BoogieIcfgContainer [2020-12-01 14:58:28,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 14:58:28,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 14:58:28,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 14:58:28,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 14:58:28,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 02:58:27" (1/3) ... [2020-12-01 14:58:28,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61600b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 02:58:28, skipping insertion in model container [2020-12-01 14:58:28,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:58:27" (2/3) ... [2020-12-01 14:58:28,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61600b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 02:58:28, skipping insertion in model container [2020-12-01 14:58:28,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:58:28" (3/3) ... [2020-12-01 14:58:28,018 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2020-12-01 14:58:28,037 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 14:58:28,041 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 14:58:28,082 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 14:58:28,144 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 14:58:28,144 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 14:58:28,144 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 14:58:28,144 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 14:58:28,145 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 14:58:28,145 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 14:58:28,145 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 14:58:28,145 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 14:58:28,178 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-01 14:58:28,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 14:58:28,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:58:28,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:58:28,187 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:58:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:58:28,195 INFO L82 PathProgramCache]: Analyzing trace with hash 809990150, now seen corresponding path program 1 times [2020-12-01 14:58:28,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:58:28,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007890805] [2020-12-01 14:58:28,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:58:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:28,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 14:58:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:58:28,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007890805] [2020-12-01 14:58:28,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:58:28,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 14:58:28,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713209016] [2020-12-01 14:58:28,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 14:58:28,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:58:28,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 14:58:28,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-01 14:58:28,624 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-12-01 14:58:28,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:58:28,706 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-12-01 14:58:28,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 14:58:28,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-01 14:58:28,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:58:28,723 INFO L225 Difference]: With dead ends: 35 [2020-12-01 14:58:28,723 INFO L226 Difference]: Without dead ends: 21 [2020-12-01 14:58:28,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-01 14:58:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-01 14:58:28,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-01 14:58:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-01 14:58:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-01 14:58:28,780 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2020-12-01 14:58:28,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:58:28,781 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-01 14:58:28,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 14:58:28,782 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-01 14:58:28,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-01 14:58:28,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:58:28,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:58:28,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 14:58:28,786 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:58:28,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:58:28,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1198290194, now seen corresponding path program 1 times [2020-12-01 14:58:28,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:58:28,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485169020] [2020-12-01 14:58:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:58:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:28,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 14:58:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:28,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 14:58:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:58:28,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485169020] [2020-12-01 14:58:28,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:58:28,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-01 14:58:28,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374830643] [2020-12-01 14:58:28,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 14:58:28,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:58:28,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 14:58:28,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-01 14:58:28,990 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2020-12-01 14:58:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:58:29,112 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-01 14:58:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 14:58:29,114 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-01 14:58:29,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:58:29,117 INFO L225 Difference]: With dead ends: 30 [2020-12-01 14:58:29,118 INFO L226 Difference]: Without dead ends: 26 [2020-12-01 14:58:29,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-01 14:58:29,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-01 14:58:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-12-01 14:58:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-01 14:58:29,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-01 14:58:29,136 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-12-01 14:58:29,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:58:29,137 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-01 14:58:29,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 14:58:29,138 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-01 14:58:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 14:58:29,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:58:29,140 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:58:29,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 14:58:29,141 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:58:29,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:58:29,143 INFO L82 PathProgramCache]: Analyzing trace with hash 602004046, now seen corresponding path program 1 times [2020-12-01 14:58:29,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:58:29,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928167958] [2020-12-01 14:58:29,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:58:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:29,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 14:58:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:29,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 14:58:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:29,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 14:58:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 14:58:29,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928167958] [2020-12-01 14:58:29,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777793044] [2020-12-01 14:58:29,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/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 [2020-12-01 14:58:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:29,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 14:58:29,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:58:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 14:58:29,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:58:29,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-12-01 14:58:29,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253359924] [2020-12-01 14:58:29,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 14:58:29,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:58:29,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 14:58:29,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-01 14:58:29,758 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 11 states. [2020-12-01 14:58:29,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:58:29,877 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-01 14:58:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 14:58:29,886 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-12-01 14:58:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:58:29,888 INFO L225 Difference]: With dead ends: 36 [2020-12-01 14:58:29,888 INFO L226 Difference]: Without dead ends: 32 [2020-12-01 14:58:29,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-12-01 14:58:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-01 14:58:29,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-12-01 14:58:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-01 14:58:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-01 14:58:29,899 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-12-01 14:58:29,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:58:29,900 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-01 14:58:29,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 14:58:29,900 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-01 14:58:29,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-01 14:58:29,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:58:29,902 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:58:30,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-01 14:58:30,126 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:58:30,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:58:30,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1171563466, now seen corresponding path program 1 times [2020-12-01 14:58:30,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:58:30,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874566337] [2020-12-01 14:58:30,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:58:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:30,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 14:58:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:30,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 14:58:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:30,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 14:58:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:30,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 14:58:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-01 14:58:30,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874566337] [2020-12-01 14:58:30,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970698351] [2020-12-01 14:58:30,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/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 [2020-12-01 14:58:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:30,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-01 14:58:30,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:58:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-01 14:58:30,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:58:30,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-12-01 14:58:30,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267588329] [2020-12-01 14:58:30,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-01 14:58:30,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:58:30,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-01 14:58:30,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-01 14:58:30,638 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 12 states. [2020-12-01 14:58:30,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:58:30,784 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-12-01 14:58:30,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 14:58:30,790 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-12-01 14:58:30,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:58:30,795 INFO L225 Difference]: With dead ends: 42 [2020-12-01 14:58:30,795 INFO L226 Difference]: Without dead ends: 38 [2020-12-01 14:58:30,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-12-01 14:58:30,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-01 14:58:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-12-01 14:58:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-01 14:58:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-01 14:58:30,818 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2020-12-01 14:58:30,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:58:30,819 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-01 14:58:30,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-01 14:58:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-01 14:58:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-01 14:58:30,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:58:30,821 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:58:31,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:58:31,022 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:58:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:58:31,023 INFO L82 PathProgramCache]: Analyzing trace with hash -232513386, now seen corresponding path program 2 times [2020-12-01 14:58:31,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:58:31,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187689809] [2020-12-01 14:58:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:58:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:31,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 14:58:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:31,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 14:58:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:31,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 14:58:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:31,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 14:58:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:31,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 14:58:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:58:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-01 14:58:31,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187689809] [2020-12-01 14:58:31,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628779555] [2020-12-01 14:58:31,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/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 [2020-12-01 14:58:31,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 14:58:31,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:58:31,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-01 14:58:31,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:58:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-01 14:58:31,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 14:58:31,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-12-01 14:58:31,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561372865] [2020-12-01 14:58:31,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 14:58:31,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:58:31,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 14:58:31,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-01 14:58:31,525 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2020-12-01 14:58:31,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:58:31,654 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-01 14:58:31,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-01 14:58:31,655 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-12-01 14:58:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:58:31,658 INFO L225 Difference]: With dead ends: 48 [2020-12-01 14:58:31,659 INFO L226 Difference]: Without dead ends: 44 [2020-12-01 14:58:31,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-01 14:58:31,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-01 14:58:31,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2020-12-01 14:58:31,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-01 14:58:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-01 14:58:31,680 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 34 [2020-12-01 14:58:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:58:31,681 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-01 14:58:31,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 14:58:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-01 14:58:31,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-01 14:58:31,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:58:31,685 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:58:31,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:58:31,898 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:58:31,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:58:31,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1788325506, now seen corresponding path program 2 times [2020-12-01 14:58:31,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:58:31,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936238412] [2020-12-01 14:58:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:58:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 14:58:31,940 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 14:58:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 14:58:31,969 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 14:58:32,003 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 14:58:32,004 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 14:58:32,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-01 14:58:32,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 02:58:32 BoogieIcfgContainer [2020-12-01 14:58:32,070 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 14:58:32,077 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 14:58:32,078 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 14:58:32,078 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 14:58:32,079 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:58:28" (3/4) ... [2020-12-01 14:58:32,081 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 14:58:32,152 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_da182cd5-b590-4f3a-9b93-0152026e992a/bin/uautomizer/witness.graphml [2020-12-01 14:58:32,153 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 14:58:32,155 INFO L168 Benchmark]: Toolchain (without parser) took 4893.17 ms. Allocated memory was 100.7 MB in the beginning and 136.3 MB in the end (delta: 35.7 MB). Free memory was 72.8 MB in the beginning and 105.5 MB in the end (delta: -32.8 MB). Peak memory consumption was 2.0 MB. Max. memory is 16.1 GB. [2020-12-01 14:58:32,156 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 100.7 MB. Free memory is still 57.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 14:58:32,157 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.74 ms. Allocated memory was 100.7 MB in the beginning and 136.3 MB in the end (delta: 35.7 MB). Free memory was 72.4 MB in the beginning and 113.5 MB in the end (delta: -41.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 14:58:32,157 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.97 ms. Allocated memory is still 136.3 MB. Free memory was 113.5 MB in the beginning and 112.7 MB in the end (delta: 853.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 14:58:32,158 INFO L168 Benchmark]: Boogie Preprocessor took 37.66 ms. Allocated memory is still 136.3 MB. Free memory was 112.7 MB in the beginning and 111.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 14:58:32,159 INFO L168 Benchmark]: RCFGBuilder took 339.79 ms. Allocated memory is still 136.3 MB. Free memory was 111.4 MB in the beginning and 99.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-01 14:58:32,160 INFO L168 Benchmark]: TraceAbstraction took 4061.47 ms. Allocated memory is still 136.3 MB. Free memory was 98.8 MB in the beginning and 107.6 MB in the end (delta: -8.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 14:58:32,161 INFO L168 Benchmark]: Witness Printer took 75.56 ms. Allocated memory is still 136.3 MB. Free memory was 107.6 MB in the beginning and 105.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 14:58:32,164 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 100.7 MB. Free memory is still 57.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 317.74 ms. Allocated memory was 100.7 MB in the beginning and 136.3 MB in the end (delta: 35.7 MB). Free memory was 72.4 MB in the beginning and 113.5 MB in the end (delta: -41.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.97 ms. Allocated memory is still 136.3 MB. Free memory was 113.5 MB in the beginning and 112.7 MB in the end (delta: 853.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.66 ms. Allocated memory is still 136.3 MB. Free memory was 112.7 MB in the beginning and 111.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 339.79 ms. Allocated memory is still 136.3 MB. Free memory was 111.4 MB in the beginning and 99.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4061.47 ms. Allocated memory is still 136.3 MB. Free memory was 98.8 MB in the beginning and 107.6 MB in the end (delta: -8.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 75.56 ms. Allocated memory is still 136.3 MB. Free memory was 107.6 MB in the beginning and 105.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L20] int input = 5; [L21] CALL, EXPR id(input) VAL [\old(x)=5] [L10] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L11] CALL, EXPR id2(x-1) VAL [\old(x)=4] [L15] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L16] CALL, EXPR id(x-1) VAL [\old(x)=3] [L10] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L11] CALL, EXPR id2(x-1) VAL [\old(x)=2] [L15] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L16] CALL, EXPR id(x-1) VAL [\old(x)=1] [L10] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L11] CALL, EXPR id2(x-1) VAL [\old(x)=0] [L15] COND TRUE x==0 [L15] return 0; VAL [\old(x)=0, \result=0, x=0] [L11] RET, EXPR id2(x-1) VAL [\old(x)=1, id2(x-1)=0, x=1] [L11] return id2(x-1) + 1; [L16] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L16] return id(x-1) + 1; [L11] RET, EXPR id2(x-1) VAL [\old(x)=3, id2(x-1)=2, x=3] [L11] return id2(x-1) + 1; [L16] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L16] return id(x-1) + 1; [L11] RET, EXPR id2(x-1) VAL [\old(x)=5, id2(x-1)=4, x=5] [L11] return id2(x-1) + 1; [L21] RET, EXPR id(input) [L21] int result = id(input); [L22] COND TRUE result == 5 [L4] __assert_fail("0", "id2_i5_o5-1.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 78 SDtfs, 90 SDslu, 352 SDs, 0 SdLazy, 235 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 26 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 234 NumberOfCodeBlocks, 234 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 186 ConstructedInterpolants, 0 QuantifiedInterpolants, 11562 SizeOfPredicates, 15 NumberOfNonLiveVariables, 285 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 34/68 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...