./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/nested-1.i --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_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-new/nested-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f63971ff7e1e47adf4fc8a9c16196a6401c3822 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:42:16,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:42:16,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:42:16,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:42:16,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:42:16,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:42:16,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:42:16,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:42:16,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:42:16,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:42:16,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:42:16,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:42:16,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:42:16,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:42:16,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:42:16,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:42:16,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:42:16,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:42:16,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:42:16,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:42:16,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:42:16,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:42:16,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:42:16,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:42:16,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:42:16,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:42:16,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:42:16,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:42:16,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:42:16,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:42:16,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:42:16,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:42:16,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:42:16,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:42:16,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:42:16,877 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:42:16,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:42:16,878 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:42:16,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:42:16,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:42:16,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:42:16,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 01:42:16,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:42:16,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:42:16,918 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:42:16,918 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:42:16,919 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:42:16,919 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:42:16,919 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:42:16,919 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:42:16,920 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:42:16,920 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:42:16,921 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:42:16,921 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:42:16,921 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:42:16,922 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:42:16,922 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:42:16,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:42:16,923 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:42:16,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:42:16,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:42:16,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:42:16,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:42:16,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:42:16,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:42:16,925 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:42:16,925 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:42:16,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:42:16,925 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:42:16,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:42:16,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:42:16,927 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:42:16,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:42:16,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:42:16,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:42:16,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:42:16,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:42:16,929 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:42:16,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:42:16,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:42:16,930 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:42:16,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:42:16,930 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f63971ff7e1e47adf4fc8a9c16196a6401c3822 [2020-11-30 01:42:17,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:42:17,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:42:17,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:42:17,223 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:42:17,224 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:42:17,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/../../sv-benchmarks/c/loop-new/nested-1.i [2020-11-30 01:42:17,301 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/data/7723a9426/757ce8770b8e4a3cb435da048d3a9b0d/FLAG5adbf629b [2020-11-30 01:42:17,702 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:42:17,702 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/sv-benchmarks/c/loop-new/nested-1.i [2020-11-30 01:42:17,708 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/data/7723a9426/757ce8770b8e4a3cb435da048d3a9b0d/FLAG5adbf629b [2020-11-30 01:42:18,108 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/data/7723a9426/757ce8770b8e4a3cb435da048d3a9b0d [2020-11-30 01:42:18,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:42:18,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:42:18,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:42:18,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:42:18,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:42:18,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:42:18" (1/1) ... [2020-11-30 01:42:18,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c1c5a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:18, skipping insertion in model container [2020-11-30 01:42:18,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:42:18" (1/1) ... [2020-11-30 01:42:18,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:42:18,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:42:18,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:42:18,325 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:42:18,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:42:18,376 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:42:18,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:18 WrapperNode [2020-11-30 01:42:18,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:42:18,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:42:18,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:42:18,379 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:42:18,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:18" (1/1) ... [2020-11-30 01:42:18,395 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:18" (1/1) ... [2020-11-30 01:42:18,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:42:18,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:42:18,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:42:18,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:42:18,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:18" (1/1) ... [2020-11-30 01:42:18,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:18" (1/1) ... [2020-11-30 01:42:18,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:18" (1/1) ... [2020-11-30 01:42:18,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:18" (1/1) ... [2020-11-30 01:42:18,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:18" (1/1) ... [2020-11-30 01:42:18,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:18" (1/1) ... [2020-11-30 01:42:18,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:18" (1/1) ... [2020-11-30 01:42:18,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:42:18,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:42:18,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:42:18,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:42:18,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/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 [2020-11-30 01:42:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:42:18,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:42:18,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:42:18,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:42:18,872 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:42:18,872 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-30 01:42:18,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:42:18 BoogieIcfgContainer [2020-11-30 01:42:18,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:42:18,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:42:18,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:42:18,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:42:18,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:42:18" (1/3) ... [2020-11-30 01:42:18,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d4be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:42:18, skipping insertion in model container [2020-11-30 01:42:18,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:18" (2/3) ... [2020-11-30 01:42:18,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d4be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:42:18, skipping insertion in model container [2020-11-30 01:42:18,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:42:18" (3/3) ... [2020-11-30 01:42:18,889 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-1.i [2020-11-30 01:42:18,899 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:42:18,916 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:42:18,927 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:42:18,963 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:42:18,964 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:42:18,964 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:42:18,964 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:42:18,964 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:42:18,964 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:42:18,964 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:42:18,965 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:42:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-30 01:42:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:42:18,980 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:18,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:42:18,981 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:42:18,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:18,986 INFO L82 PathProgramCache]: Analyzing trace with hash 259473662, now seen corresponding path program 1 times [2020-11-30 01:42:18,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:18,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126465454] [2020-11-30 01:42:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:19,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126465454] [2020-11-30 01:42:19,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:42:19,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:42:19,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397453696] [2020-11-30 01:42:19,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:42:19,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:19,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:42:19,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:42:19,188 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 4 states. [2020-11-30 01:42:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:19,241 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2020-11-30 01:42:19,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:42:19,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-30 01:42:19,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:19,253 INFO L225 Difference]: With dead ends: 24 [2020-11-30 01:42:19,256 INFO L226 Difference]: Without dead ends: 11 [2020-11-30 01:42:19,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:42:19,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-30 01:42:19,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2020-11-30 01:42:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-30 01:42:19,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-30 01:42:19,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2020-11-30 01:42:19,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:19,297 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-30 01:42:19,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:42:19,297 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-11-30 01:42:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:42:19,298 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:19,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:42:19,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:42:19,299 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:42:19,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:19,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1064763538, now seen corresponding path program 1 times [2020-11-30 01:42:19,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:19,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407344410] [2020-11-30 01:42:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:19,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407344410] [2020-11-30 01:42:19,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:42:19,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:42:19,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945827] [2020-11-30 01:42:19,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:42:19,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:19,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:42:19,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:42:19,388 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2020-11-30 01:42:19,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:19,418 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2020-11-30 01:42:19,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:42:19,419 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-30 01:42:19,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:19,420 INFO L225 Difference]: With dead ends: 17 [2020-11-30 01:42:19,420 INFO L226 Difference]: Without dead ends: 11 [2020-11-30 01:42:19,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:42:19,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-30 01:42:19,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-30 01:42:19,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-30 01:42:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-30 01:42:19,423 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2020-11-30 01:42:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:19,423 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-30 01:42:19,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:42:19,423 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-30 01:42:19,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:42:19,423 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:19,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:42:19,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:42:19,424 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:42:19,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:19,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1239531764, now seen corresponding path program 1 times [2020-11-30 01:42:19,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:19,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873281576] [2020-11-30 01:42:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:19,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873281576] [2020-11-30 01:42:19,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957444323] [2020-11-30 01:42:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/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 [2020-11-30 01:42:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:19,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:42:19,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:42:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:19,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:42:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:19,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1255070557] [2020-11-30 01:42:19,752 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 01:42:19,752 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:42:19,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:42:19,761 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:42:19,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:42:20,560 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:42:20,796 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 41 [2020-11-30 01:42:20,926 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-11-30 01:42:21,089 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-11-30 01:42:21,391 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-11-30 01:42:21,782 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 40 [2020-11-30 01:42:21,785 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:42:21,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:42:21,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-11-30 01:42:21,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214852830] [2020-11-30 01:42:21,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:42:21,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:21,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:42:21,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:42:21,787 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 10 states. [2020-11-30 01:42:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:21,870 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2020-11-30 01:42:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:42:21,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2020-11-30 01:42:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:21,872 INFO L225 Difference]: With dead ends: 21 [2020-11-30 01:42:21,872 INFO L226 Difference]: Without dead ends: 14 [2020-11-30 01:42:21,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:42:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-30 01:42:21,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-30 01:42:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-30 01:42:21,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-30 01:42:21,881 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-11-30 01:42:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:21,881 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-30 01:42:21,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:42:21,882 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-30 01:42:21,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 01:42:21,882 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:21,883 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:42:22,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 01:42:22,093 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:42:22,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:22,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1318047506, now seen corresponding path program 2 times [2020-11-30 01:42:22,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:22,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454979748] [2020-11-30 01:42:22,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:22,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454979748] [2020-11-30 01:42:22,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000334689] [2020-11-30 01:42:22,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/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 [2020-11-30 01:42:22,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 01:42:22,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:42:22,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:42:22,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:42:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-30 01:42:22,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:42:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-30 01:42:22,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1364848836] [2020-11-30 01:42:22,371 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 01:42:22,371 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:42:22,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:42:22,372 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:42:22,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:42:22,737 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:42:23,002 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 41 [2020-11-30 01:42:23,157 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-11-30 01:42:23,332 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-11-30 01:42:23,689 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-11-30 01:42:24,086 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 40 [2020-11-30 01:42:24,087 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:42:24,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:42:24,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2020-11-30 01:42:24,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661742392] [2020-11-30 01:42:24,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 01:42:24,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:24,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 01:42:24,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-11-30 01:42:24,090 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 14 states. [2020-11-30 01:42:24,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:24,836 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2020-11-30 01:42:24,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-30 01:42:24,837 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2020-11-30 01:42:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:24,838 INFO L225 Difference]: With dead ends: 46 [2020-11-30 01:42:24,838 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 01:42:24,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=538, Invalid=1442, Unknown=0, NotChecked=0, Total=1980 [2020-11-30 01:42:24,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 01:42:24,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-30 01:42:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-30 01:42:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-11-30 01:42:24,854 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 13 [2020-11-30 01:42:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:24,855 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-11-30 01:42:24,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 01:42:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-11-30 01:42:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-30 01:42:24,858 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:24,858 INFO L422 BasicCegarLoop]: trace histogram [20, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:42:25,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:42:25,084 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:42:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash 168128382, now seen corresponding path program 3 times [2020-11-30 01:42:25,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:25,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208839275] [2020-11-30 01:42:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-11-30 01:42:25,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208839275] [2020-11-30 01:42:25,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949503296] [2020-11-30 01:42:25,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/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 [2020-11-30 01:42:25,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:42:25,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:42:25,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:42:25,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:42:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-11-30 01:42:25,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:42:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-11-30 01:42:25,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448517593] [2020-11-30 01:42:25,474 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 01:42:25,474 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:42:25,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:42:25,474 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:42:25,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:42:25,812 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:42:26,048 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 41 [2020-11-30 01:42:26,284 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-11-30 01:42:26,521 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-11-30 01:42:26,787 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 40 [2020-11-30 01:42:26,788 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:42:26,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:42:26,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2020-11-30 01:42:26,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355393137] [2020-11-30 01:42:26,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 01:42:26,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:26,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 01:42:26,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=462, Unknown=0, NotChecked=0, Total=650 [2020-11-30 01:42:26,790 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 20 states. [2020-11-30 01:42:26,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:26,967 INFO L93 Difference]: Finished difference Result 82 states and 109 transitions. [2020-11-30 01:42:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:42:26,970 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2020-11-30 01:42:26,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:26,971 INFO L225 Difference]: With dead ends: 82 [2020-11-30 01:42:26,971 INFO L226 Difference]: Without dead ends: 56 [2020-11-30 01:42:26,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2020-11-30 01:42:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-30 01:42:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-30 01:42:26,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-30 01:42:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-11-30 01:42:26,983 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-11-30 01:42:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:26,983 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-11-30 01:42:26,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 01:42:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-11-30 01:42:26,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-30 01:42:26,989 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:26,990 INFO L422 BasicCegarLoop]: trace histogram [40, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:42:27,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:42:27,217 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:42:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:27,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1093130686, now seen corresponding path program 4 times [2020-11-30 01:42:27,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:27,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22695802] [2020-11-30 01:42:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-11-30 01:42:27,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22695802] [2020-11-30 01:42:27,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332209644] [2020-11-30 01:42:27,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/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 [2020-11-30 01:42:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:27,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:42:27,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:42:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-11-30 01:42:27,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:42:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-11-30 01:42:27,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1660101218] [2020-11-30 01:42:27,862 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 01:42:27,862 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:42:27,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:42:27,863 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:42:27,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:42:28,269 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:42:28,449 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 41 [2020-11-30 01:42:28,943 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-11-30 01:42:29,191 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 40 [2020-11-30 01:42:29,192 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:42:29,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:42:29,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2020-11-30 01:42:29,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839022103] [2020-11-30 01:42:29,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-30 01:42:29,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:29,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-30 01:42:29,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2020-11-30 01:42:29,195 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 19 states. [2020-11-30 01:42:29,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:29,427 INFO L93 Difference]: Finished difference Result 132 states and 147 transitions. [2020-11-30 01:42:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:42:29,427 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-11-30 01:42:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:29,429 INFO L225 Difference]: With dead ends: 132 [2020-11-30 01:42:29,429 INFO L226 Difference]: Without dead ends: 128 [2020-11-30 01:42:29,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2020-11-30 01:42:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-30 01:42:29,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-11-30 01:42:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-11-30 01:42:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2020-11-30 01:42:29,456 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 55 [2020-11-30 01:42:29,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:29,458 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2020-11-30 01:42:29,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-30 01:42:29,458 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2020-11-30 01:42:29,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-30 01:42:29,467 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:29,467 INFO L422 BasicCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:42:29,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:42:29,693 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:42:29,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:29,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1038922018, now seen corresponding path program 5 times [2020-11-30 01:42:29,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:29,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541859117] [2020-11-30 01:42:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 5922 proven. 119 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-30 01:42:35,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541859117] [2020-11-30 01:42:35,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480559658] [2020-11-30 01:42:35,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/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 [2020-11-30 01:42:35,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2020-11-30 01:42:35,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:42:35,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 104 conjunts are in the unsatisfiable core [2020-11-30 01:42:35,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:42:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 6041 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-30 01:42:36,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:42:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 6041 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-30 01:42:36,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:42:36,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103, 103] imperfect sequences [103] total 105 [2020-11-30 01:42:36,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406839665] [2020-11-30 01:42:36,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-11-30 01:42:36,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:36,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-11-30 01:42:36,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5261, Invalid=5869, Unknown=0, NotChecked=0, Total=11130 [2020-11-30 01:42:36,362 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand 104 states. [2020-11-30 01:42:37,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:37,614 INFO L93 Difference]: Finished difference Result 5123 states and 5583 transitions. [2020-11-30 01:42:37,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-11-30 01:42:37,614 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 127 [2020-11-30 01:42:37,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:37,615 INFO L225 Difference]: With dead ends: 5123 [2020-11-30 01:42:37,615 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:42:37,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5366, Invalid=5976, Unknown=0, NotChecked=0, Total=11342 [2020-11-30 01:42:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:42:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:42:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:42:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:42:37,629 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 127 [2020-11-30 01:42:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:37,629 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:42:37,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-11-30 01:42:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:42:37,629 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:42:37,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-11-30 01:42:37,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 01:42:39,654 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 671 DAG size of output: 632 [2020-11-30 01:43:16,502 WARN L193 SmtUtils]: Spent 36.83 s on a formula simplification. DAG size of input: 4903 DAG size of output: 1178 [2020-11-30 01:43:23,891 WARN L193 SmtUtils]: Spent 7.38 s on a formula simplification. DAG size of input: 632 DAG size of output: 58 [2020-11-30 01:44:00,650 WARN L193 SmtUtils]: Spent 36.75 s on a formula simplification. DAG size of input: 1178 DAG size of output: 347 [2020-11-30 01:44:00,656 INFO L270 CegarLoopResult]: At program point L31-3(lines 31 35) the Hoare annotation is: (let ((.cse0 (<= 10 ULTIMATE.start_main_~m~0)) (.cse1 (<= 10 ULTIMATE.start_main_~n~0))) (or (and .cse0 .cse1 (<= 100 ULTIMATE.start_main_~k~0)) (and .cse0 (< (+ ULTIMATE.start_main_~i~0 3) ULTIMATE.start_main_~n~0) .cse1 (<= 60 ULTIMATE.start_main_~k~0)) (and .cse0 .cse1 (<= ULTIMATE.start_main_~i~0 3) (<= 30 ULTIMATE.start_main_~k~0)) (and .cse0 .cse1 (< (+ ULTIMATE.start_main_~i~0 4) ULTIMATE.start_main_~n~0) (<= 50 ULTIMATE.start_main_~k~0)) (and (< (+ ULTIMATE.start_main_~i~0 1) ULTIMATE.start_main_~n~0) .cse0 (<= 80 ULTIMATE.start_main_~k~0) .cse1) (and .cse0 (<= 40 ULTIMATE.start_main_~k~0) .cse1 (<= ULTIMATE.start_main_~i~0 4)) (and .cse0 .cse1 (<= 70 ULTIMATE.start_main_~k~0) (< (+ ULTIMATE.start_main_~i~0 2) ULTIMATE.start_main_~n~0)) (and .cse0 (= ULTIMATE.start_main_~i~0 0) .cse1 (<= 0 ULTIMATE.start_main_~k~0)) (and .cse0 (<= 90 ULTIMATE.start_main_~k~0) .cse1 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (and .cse0 .cse1 (<= 20 ULTIMATE.start_main_~k~0) (<= ULTIMATE.start_main_~i~0 2)) (and .cse0 (<= 10 ULTIMATE.start_main_~k~0) .cse1 (<= ULTIMATE.start_main_~i~0 1)))) [2020-11-30 01:44:00,656 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 01:44:00,657 INFO L270 CegarLoopResult]: At program point L32-3(lines 32 34) the Hoare annotation is: (let ((.cse24 (<= 30 ULTIMATE.start_main_~k~0)) (.cse27 (<= 80 ULTIMATE.start_main_~k~0)) (.cse12 (<= 40 ULTIMATE.start_main_~k~0)) (.cse28 (<= 90 ULTIMATE.start_main_~k~0)) (.cse25 (<= 10 ULTIMATE.start_main_~k~0)) (.cse17 (< (+ ULTIMATE.start_main_~j~0 1) ULTIMATE.start_main_~m~0)) (.cse6 (= ULTIMATE.start_main_~i~0 0)) (.cse4 (<= ULTIMATE.start_main_~i~0 4)) (.cse29 (<= 20 ULTIMATE.start_main_~k~0)) (.cse19 (<= ULTIMATE.start_main_~j~0 4)) (.cse3 (< (+ ULTIMATE.start_main_~i~0 2) ULTIMATE.start_main_~n~0)) (.cse13 (<= ULTIMATE.start_main_~i~0 2)) (.cse10 (<= ULTIMATE.start_main_~j~0 3)) (.cse23 (<= 70 ULTIMATE.start_main_~k~0)) (.cse5 (<= ULTIMATE.start_main_~j~0 2)) (.cse18 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (.cse9 (<= 50 ULTIMATE.start_main_~k~0)) (.cse22 (= ULTIMATE.start_main_~j~0 0)) (.cse0 (< (+ ULTIMATE.start_main_~j~0 2) ULTIMATE.start_main_~m~0)) (.cse21 (<= ULTIMATE.start_main_~j~0 1)) (.cse7 (<= ULTIMATE.start_main_~i~0 1)) (.cse20 (< (+ ULTIMATE.start_main_~i~0 1) ULTIMATE.start_main_~n~0)) (.cse15 (< ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~m~0)) (.cse8 (< (+ ULTIMATE.start_main_~j~0 3) ULTIMATE.start_main_~m~0)) (.cse14 (< (+ ULTIMATE.start_main_~i~0 4) ULTIMATE.start_main_~n~0)) (.cse30 (<= 60 ULTIMATE.start_main_~k~0)) (.cse11 (<= ULTIMATE.start_main_~i~0 3)) (.cse1 (<= 10 ULTIMATE.start_main_~m~0)) (.cse16 (< (+ ULTIMATE.start_main_~i~0 3) ULTIMATE.start_main_~n~0)) (.cse2 (<= 10 ULTIMATE.start_main_~n~0)) (.cse26 (<= ULTIMATE.start_main_~j~0 5))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 77 ULTIMATE.start_main_~k~0)) (and .cse0 .cse1 .cse2 (<= 47 ULTIMATE.start_main_~k~0) .cse4) (and .cse1 .cse5 (<= 42 ULTIMATE.start_main_~k~0) .cse2 .cse4) (and (<= 2 ULTIMATE.start_main_~k~0) .cse1 .cse5 .cse6 .cse2) (and .cse1 .cse5 (<= 12 ULTIMATE.start_main_~k~0) .cse2 .cse7) (and .cse1 (<= 16 ULTIMATE.start_main_~k~0) .cse2 .cse7 .cse8) (and .cse1 .cse2 .cse9 .cse4) (and .cse1 .cse2 (<= 73 ULTIMATE.start_main_~k~0) .cse10 .cse3) (and .cse1 .cse2 .cse11 (<= 36 ULTIMATE.start_main_~k~0) .cse8) (and .cse1 .cse12 .cse2 .cse11) (and .cse1 (<= 22 ULTIMATE.start_main_~k~0) .cse5 .cse2 .cse13) (and .cse1 .cse5 .cse2 .cse14 (<= 52 ULTIMATE.start_main_~k~0)) (and .cse1 .cse2 (<= 59 ULTIMATE.start_main_~k~0) .cse14 .cse15) (and .cse1 .cse2 .cse10 (<= 13 ULTIMATE.start_main_~k~0) .cse7) (and .cse1 .cse16 .cse5 .cse2 (<= 62 ULTIMATE.start_main_~k~0)) (and .cse1 .cse6 (<= 6 ULTIMATE.start_main_~k~0) .cse2 .cse8) (and .cse1 .cse17 (<= 98 ULTIMATE.start_main_~k~0) .cse18 .cse2) (and .cse1 (<= 54 ULTIMATE.start_main_~k~0) .cse19 .cse2 .cse14) (and .cse20 .cse1 .cse5 (<= 82 ULTIMATE.start_main_~k~0) .cse2) (and .cse1 .cse17 .cse2 .cse3 (<= 78 ULTIMATE.start_main_~k~0)) (and .cse20 .cse1 .cse2 .cse10 (<= 83 ULTIMATE.start_main_~k~0)) (and .cse1 (<= 21 ULTIMATE.start_main_~k~0) .cse2 .cse21 .cse13) (and .cse1 .cse6 .cse17 (<= 8 ULTIMATE.start_main_~k~0) .cse2) (and .cse1 .cse2 .cse22 .cse23 .cse3) (and .cse1 .cse6 .cse2 .cse15 (<= 9 ULTIMATE.start_main_~k~0)) (and .cse1 .cse19 .cse2 (<= 24 ULTIMATE.start_main_~k~0) .cse13) (and .cse1 .cse2 .cse11 .cse22 .cse24) (and .cse1 (<= 71 ULTIMATE.start_main_~k~0) .cse2 .cse21 .cse3) (and .cse1 .cse6 .cse2 .cse10 (<= 3 ULTIMATE.start_main_~k~0)) (and .cse1 (<= 39 ULTIMATE.start_main_~k~0) .cse2 .cse11 .cse15) (and .cse1 .cse16 .cse2 (<= 66 ULTIMATE.start_main_~k~0) .cse8) (and .cse1 .cse19 .cse18 .cse2 (<= 94 ULTIMATE.start_main_~k~0)) (and .cse0 .cse1 (<= 37 ULTIMATE.start_main_~k~0) .cse2 .cse11) (and .cse1 .cse17 .cse2 .cse11 (<= 38 ULTIMATE.start_main_~k~0)) (and .cse1 .cse6 .cse25 .cse2) (and .cse1 (<= 34 ULTIMATE.start_main_~k~0) .cse19 .cse2 .cse11) (and .cse1 .cse16 (<= 61 ULTIMATE.start_main_~k~0) .cse2 .cse21) (and .cse1 .cse2 .cse13 .cse26 (<= 25 ULTIMATE.start_main_~k~0)) (and .cse1 (<= 23 ULTIMATE.start_main_~k~0) .cse2 .cse10 .cse13) (and .cse1 .cse6 .cse2 (<= 5 ULTIMATE.start_main_~k~0) .cse26) (and .cse20 .cse1 .cse27 .cse2 .cse22) (and .cse1 .cse2 (<= 79 ULTIMATE.start_main_~k~0) .cse15 .cse3) (and .cse20 .cse1 .cse17 .cse2 (<= 88 ULTIMATE.start_main_~k~0)) (and .cse1 .cse2 .cse24 .cse13) (and .cse1 .cse2 .cse14 .cse21 (<= 51 ULTIMATE.start_main_~k~0)) (and .cse0 .cse1 (<= 57 ULTIMATE.start_main_~k~0) .cse2 .cse14) (and .cse1 .cse2 (<= 29 ULTIMATE.start_main_~k~0) .cse15 .cse13) (and .cse1 .cse28 .cse18 .cse2 .cse22) (and .cse1 (<= 93 ULTIMATE.start_main_~k~0) .cse18 .cse2 .cse10) (and .cse1 .cse6 .cse2 .cse22 (<= 0 ULTIMATE.start_main_~k~0)) (and .cse1 .cse18 .cse2 .cse21 (<= 91 ULTIMATE.start_main_~k~0)) (and .cse1 .cse27 .cse2 .cse3) (and .cse1 (<= 31 ULTIMATE.start_main_~k~0) .cse2 .cse11 .cse21) (and .cse0 .cse1 (<= 97 ULTIMATE.start_main_~k~0) .cse18 .cse2) (and .cse20 .cse1 .cse2 .cse21 (<= 81 ULTIMATE.start_main_~k~0)) (and .cse1 .cse2 .cse14 .cse26 (<= 55 ULTIMATE.start_main_~k~0)) (and .cse1 .cse16 .cse19 .cse2 (<= 64 ULTIMATE.start_main_~k~0)) (and .cse1 (<= 69 ULTIMATE.start_main_~k~0) .cse16 .cse2 .cse15) (and .cse1 .cse19 .cse6 .cse2 (<= 4 ULTIMATE.start_main_~k~0)) (and .cse1 .cse12 .cse2 .cse22 .cse4) (and .cse20 .cse1 .cse28 .cse2) (and .cse1 .cse2 .cse29 .cse22 .cse13) (and .cse1 .cse5 .cse2 (<= 32 ULTIMATE.start_main_~k~0) .cse11) (and .cse1 .cse2 .cse8 (<= 46 ULTIMATE.start_main_~k~0) .cse4) (and (<= 44 ULTIMATE.start_main_~k~0) .cse1 .cse19 .cse2 .cse4) (and .cse1 (<= 28 ULTIMATE.start_main_~k~0) .cse17 .cse2 .cse13) (and (<= 49 ULTIMATE.start_main_~k~0) .cse1 .cse2 .cse15 .cse4) (and .cse1 (<= 45 ULTIMATE.start_main_~k~0) .cse2 .cse26 .cse4) (and .cse1 .cse16 .cse17 .cse2 (<= 68 ULTIMATE.start_main_~k~0)) (and .cse20 .cse1 .cse2 (<= 86 ULTIMATE.start_main_~k~0) .cse8) (and .cse1 .cse25 .cse2 .cse22 .cse7) (and .cse0 .cse1 .cse16 .cse2 (<= 67 ULTIMATE.start_main_~k~0)) (and .cse20 (<= 84 ULTIMATE.start_main_~k~0) .cse1 .cse19 .cse2) (and .cse20 .cse1 .cse2 (<= 85 ULTIMATE.start_main_~k~0) .cse26) (and .cse1 .cse18 .cse2 (<= 100 ULTIMATE.start_main_~k~0)) (and .cse1 .cse17 .cse2 (<= 18 ULTIMATE.start_main_~k~0) .cse7) (and .cse1 .cse17 .cse2 .cse14 (<= 58 ULTIMATE.start_main_~k~0)) (and .cse1 (<= 76 ULTIMATE.start_main_~k~0) .cse2 .cse3 .cse8) (and .cse1 (<= 72 ULTIMATE.start_main_~k~0) .cse5 .cse2 .cse3) (and .cse20 .cse0 .cse1 .cse2 (<= 87 ULTIMATE.start_main_~k~0)) (and .cse1 (<= 15 ULTIMATE.start_main_~k~0) .cse2 .cse7 .cse26) (and .cse1 .cse2 (<= 33 ULTIMATE.start_main_~k~0) .cse11 .cse10) (and .cse0 .cse1 .cse6 .cse2 (<= 7 ULTIMATE.start_main_~k~0)) (and .cse1 .cse2 .cse10 (<= 43 ULTIMATE.start_main_~k~0) .cse4) (and .cse1 .cse17 .cse2 (<= 48 ULTIMATE.start_main_~k~0) .cse4) (and .cse1 .cse6 .cse2 (<= 1 ULTIMATE.start_main_~k~0) .cse21) (and .cse1 (<= 41 ULTIMATE.start_main_~k~0) .cse2 .cse21 .cse4) (and .cse1 .cse18 .cse2 (<= 96 ULTIMATE.start_main_~k~0) .cse8) (and .cse1 .cse2 (<= 19 ULTIMATE.start_main_~k~0) .cse15 .cse7) (and .cse1 .cse19 .cse2 (<= 74 ULTIMATE.start_main_~k~0) .cse3) (and .cse0 .cse1 (<= 27 ULTIMATE.start_main_~k~0) .cse2 .cse13) (and .cse1 .cse2 .cse14 .cse10 (<= 53 ULTIMATE.start_main_~k~0)) (and .cse1 .cse2 .cse29 .cse7) (and .cse1 (<= 14 ULTIMATE.start_main_~k~0) .cse19 .cse2 .cse7) (and .cse1 .cse2 .cse26 .cse3 (<= 75 ULTIMATE.start_main_~k~0)) (and .cse1 .cse2 .cse13 .cse8 (<= 26 ULTIMATE.start_main_~k~0)) (and .cse1 .cse18 .cse2 (<= 95 ULTIMATE.start_main_~k~0) .cse26) (and .cse1 .cse16 (<= 63 ULTIMATE.start_main_~k~0) .cse2 .cse10) (and .cse1 .cse16 .cse2 .cse23) (and .cse1 .cse18 .cse2 (<= 99 ULTIMATE.start_main_~k~0) .cse15) (and .cse1 .cse16 .cse2 .cse22 .cse30) (and .cse1 .cse5 .cse18 .cse2 (<= 92 ULTIMATE.start_main_~k~0)) (and .cse1 .cse2 .cse14 .cse9 .cse22) (and .cse0 .cse1 (<= 17 ULTIMATE.start_main_~k~0) .cse2 .cse7) (and .cse1 (<= 11 ULTIMATE.start_main_~k~0) .cse2 .cse21 .cse7) (and .cse20 .cse1 .cse2 (<= 89 ULTIMATE.start_main_~k~0) .cse15) (and .cse1 .cse2 (<= 56 ULTIMATE.start_main_~k~0) .cse14 .cse8) (and .cse1 .cse2 .cse14 .cse30) (and .cse1 .cse2 .cse11 (<= 35 ULTIMATE.start_main_~k~0) .cse26) (and .cse1 .cse16 .cse2 .cse26 (<= 65 ULTIMATE.start_main_~k~0)))) [2020-11-30 01:44:00,657 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-30 01:44:00,657 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-30 01:44:00,657 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-30 01:44:00,658 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-30 01:44:00,658 INFO L277 CegarLoopResult]: At program point L37(lines 24 38) the Hoare annotation is: true [2020-11-30 01:44:00,658 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 01:44:00,658 INFO L274 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-11-30 01:44:00,658 INFO L274 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-11-30 01:44:00,658 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-30 01:44:00,658 INFO L270 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: (<= 10 ULTIMATE.start_main_~n~0) [2020-11-30 01:44:00,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:44:00 BoogieIcfgContainer [2020-11-30 01:44:00,708 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:44:00,708 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:44:00,709 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:44:00,709 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:44:00,709 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:42:18" (3/4) ... [2020-11-30 01:44:00,712 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:44:00,734 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-11-30 01:44:00,734 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-30 01:44:00,734 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:44:00,734 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:44:00,789 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a9cc1c79-1de4-4ab4-8247-a99c6cba2c3e/bin/utaipan/witness.graphml [2020-11-30 01:44:00,789 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:44:00,790 INFO L168 Benchmark]: Toolchain (without parser) took 102674.71 ms. Allocated memory was 90.2 MB in the beginning and 2.5 GB in the end (delta: 2.4 GB). Free memory was 57.5 MB in the beginning and 1.9 GB in the end (delta: -1.8 GB). Peak memory consumption was 573.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:44:00,791 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory was 64.4 MB in the beginning and 64.4 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:44:00,791 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.90 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 57.5 MB in the beginning and 86.4 MB in the end (delta: -28.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:44:00,792 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.06 ms. Allocated memory is still 109.1 MB. Free memory was 86.4 MB in the beginning and 85.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:44:00,804 INFO L168 Benchmark]: Boogie Preprocessor took 45.80 ms. Allocated memory is still 109.1 MB. Free memory was 85.0 MB in the beginning and 84.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:44:00,805 INFO L168 Benchmark]: RCFGBuilder took 397.40 ms. Allocated memory is still 109.1 MB. Free memory was 84.0 MB in the beginning and 68.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:44:00,805 INFO L168 Benchmark]: TraceAbstraction took 101832.47 ms. Allocated memory was 109.1 MB in the beginning and 2.5 GB in the end (delta: 2.4 GB). Free memory was 67.6 MB in the beginning and 1.9 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.5 GB. Max. memory is 16.1 GB. [2020-11-30 01:44:00,806 INFO L168 Benchmark]: Witness Printer took 80.50 ms. Allocated memory is still 2.5 GB. Free memory was 1.9 GB in the beginning and 1.9 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:44:00,809 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 90.2 MB. Free memory was 64.4 MB in the beginning and 64.4 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 258.90 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 57.5 MB in the beginning and 86.4 MB in the end (delta: -28.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.06 ms. Allocated memory is still 109.1 MB. Free memory was 86.4 MB in the beginning and 85.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.80 ms. Allocated memory is still 109.1 MB. Free memory was 85.0 MB in the beginning and 84.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 397.40 ms. Allocated memory is still 109.1 MB. Free memory was 84.0 MB in the beginning and 68.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 101832.47 ms. Allocated memory was 109.1 MB in the beginning and 2.5 GB in the end (delta: 2.4 GB). Free memory was 67.6 MB in the beginning and 1.9 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.5 GB. Max. memory is 16.1 GB. * Witness Printer took 80.50 ms. Allocated memory is still 2.5 GB. Free memory was 1.9 GB in the beginning and 1.9 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 10 <= n - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: (((((((((((10 <= m && 10 <= n) && 100 <= k) || (((10 <= m && i + 3 < n) && 10 <= n) && 60 <= k)) || (((10 <= m && 10 <= n) && i <= 3) && 30 <= k)) || (((10 <= m && 10 <= n) && i + 4 < n) && 50 <= k)) || (((i + 1 < n && 10 <= m) && 80 <= k) && 10 <= n)) || (((10 <= m && 40 <= k) && 10 <= n) && i <= 4)) || (((10 <= m && 10 <= n) && 70 <= k) && i + 2 < n)) || (((10 <= m && i == 0) && 10 <= n) && 0 <= k)) || (((10 <= m && 90 <= k) && 10 <= n) && i < n)) || (((10 <= m && 10 <= n) && 20 <= k) && i <= 2)) || (((10 <= m && 10 <= k) && 10 <= n) && i <= 1) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((j + 2 < m && 10 <= m) && 10 <= n) && i + 2 < n) && 77 <= k) || ((((j + 2 < m && 10 <= m) && 10 <= n) && 47 <= k) && i <= 4)) || ((((10 <= m && j <= 2) && 42 <= k) && 10 <= n) && i <= 4)) || ((((2 <= k && 10 <= m) && j <= 2) && i == 0) && 10 <= n)) || ((((10 <= m && j <= 2) && 12 <= k) && 10 <= n) && i <= 1)) || ((((10 <= m && 16 <= k) && 10 <= n) && i <= 1) && j + 3 < m)) || (((10 <= m && 10 <= n) && 50 <= k) && i <= 4)) || ((((10 <= m && 10 <= n) && 73 <= k) && j <= 3) && i + 2 < n)) || ((((10 <= m && 10 <= n) && i <= 3) && 36 <= k) && j + 3 < m)) || (((10 <= m && 40 <= k) && 10 <= n) && i <= 3)) || ((((10 <= m && 22 <= k) && j <= 2) && 10 <= n) && i <= 2)) || ((((10 <= m && j <= 2) && 10 <= n) && i + 4 < n) && 52 <= k)) || ((((10 <= m && 10 <= n) && 59 <= k) && i + 4 < n) && j < m)) || ((((10 <= m && 10 <= n) && j <= 3) && 13 <= k) && i <= 1)) || ((((10 <= m && i + 3 < n) && j <= 2) && 10 <= n) && 62 <= k)) || ((((10 <= m && i == 0) && 6 <= k) && 10 <= n) && j + 3 < m)) || ((((10 <= m && j + 1 < m) && 98 <= k) && i < n) && 10 <= n)) || ((((10 <= m && 54 <= k) && j <= 4) && 10 <= n) && i + 4 < n)) || ((((i + 1 < n && 10 <= m) && j <= 2) && 82 <= k) && 10 <= n)) || ((((10 <= m && j + 1 < m) && 10 <= n) && i + 2 < n) && 78 <= k)) || ((((i + 1 < n && 10 <= m) && 10 <= n) && j <= 3) && 83 <= k)) || ((((10 <= m && 21 <= k) && 10 <= n) && j <= 1) && i <= 2)) || ((((10 <= m && i == 0) && j + 1 < m) && 8 <= k) && 10 <= n)) || ((((10 <= m && 10 <= n) && j == 0) && 70 <= k) && i + 2 < n)) || ((((10 <= m && i == 0) && 10 <= n) && j < m) && 9 <= k)) || ((((10 <= m && j <= 4) && 10 <= n) && 24 <= k) && i <= 2)) || ((((10 <= m && 10 <= n) && i <= 3) && j == 0) && 30 <= k)) || ((((10 <= m && 71 <= k) && 10 <= n) && j <= 1) && i + 2 < n)) || ((((10 <= m && i == 0) && 10 <= n) && j <= 3) && 3 <= k)) || ((((10 <= m && 39 <= k) && 10 <= n) && i <= 3) && j < m)) || ((((10 <= m && i + 3 < n) && 10 <= n) && 66 <= k) && j + 3 < m)) || ((((10 <= m && j <= 4) && i < n) && 10 <= n) && 94 <= k)) || ((((j + 2 < m && 10 <= m) && 37 <= k) && 10 <= n) && i <= 3)) || ((((10 <= m && j + 1 < m) && 10 <= n) && i <= 3) && 38 <= k)) || (((10 <= m && i == 0) && 10 <= k) && 10 <= n)) || ((((10 <= m && 34 <= k) && j <= 4) && 10 <= n) && i <= 3)) || ((((10 <= m && i + 3 < n) && 61 <= k) && 10 <= n) && j <= 1)) || ((((10 <= m && 10 <= n) && i <= 2) && j <= 5) && 25 <= k)) || ((((10 <= m && 23 <= k) && 10 <= n) && j <= 3) && i <= 2)) || ((((10 <= m && i == 0) && 10 <= n) && 5 <= k) && j <= 5)) || ((((i + 1 < n && 10 <= m) && 80 <= k) && 10 <= n) && j == 0)) || ((((10 <= m && 10 <= n) && 79 <= k) && j < m) && i + 2 < n)) || ((((i + 1 < n && 10 <= m) && j + 1 < m) && 10 <= n) && 88 <= k)) || (((10 <= m && 10 <= n) && 30 <= k) && i <= 2)) || ((((10 <= m && 10 <= n) && i + 4 < n) && j <= 1) && 51 <= k)) || ((((j + 2 < m && 10 <= m) && 57 <= k) && 10 <= n) && i + 4 < n)) || ((((10 <= m && 10 <= n) && 29 <= k) && j < m) && i <= 2)) || ((((10 <= m && 90 <= k) && i < n) && 10 <= n) && j == 0)) || ((((10 <= m && 93 <= k) && i < n) && 10 <= n) && j <= 3)) || ((((10 <= m && i == 0) && 10 <= n) && j == 0) && 0 <= k)) || ((((10 <= m && i < n) && 10 <= n) && j <= 1) && 91 <= k)) || (((10 <= m && 80 <= k) && 10 <= n) && i + 2 < n)) || ((((10 <= m && 31 <= k) && 10 <= n) && i <= 3) && j <= 1)) || ((((j + 2 < m && 10 <= m) && 97 <= k) && i < n) && 10 <= n)) || ((((i + 1 < n && 10 <= m) && 10 <= n) && j <= 1) && 81 <= k)) || ((((10 <= m && 10 <= n) && i + 4 < n) && j <= 5) && 55 <= k)) || ((((10 <= m && i + 3 < n) && j <= 4) && 10 <= n) && 64 <= k)) || ((((10 <= m && 69 <= k) && i + 3 < n) && 10 <= n) && j < m)) || ((((10 <= m && j <= 4) && i == 0) && 10 <= n) && 4 <= k)) || ((((10 <= m && 40 <= k) && 10 <= n) && j == 0) && i <= 4)) || (((i + 1 < n && 10 <= m) && 90 <= k) && 10 <= n)) || ((((10 <= m && 10 <= n) && 20 <= k) && j == 0) && i <= 2)) || ((((10 <= m && j <= 2) && 10 <= n) && 32 <= k) && i <= 3)) || ((((10 <= m && 10 <= n) && j + 3 < m) && 46 <= k) && i <= 4)) || ((((44 <= k && 10 <= m) && j <= 4) && 10 <= n) && i <= 4)) || ((((10 <= m && 28 <= k) && j + 1 < m) && 10 <= n) && i <= 2)) || ((((49 <= k && 10 <= m) && 10 <= n) && j < m) && i <= 4)) || ((((10 <= m && 45 <= k) && 10 <= n) && j <= 5) && i <= 4)) || ((((10 <= m && i + 3 < n) && j + 1 < m) && 10 <= n) && 68 <= k)) || ((((i + 1 < n && 10 <= m) && 10 <= n) && 86 <= k) && j + 3 < m)) || ((((10 <= m && 10 <= k) && 10 <= n) && j == 0) && i <= 1)) || ((((j + 2 < m && 10 <= m) && i + 3 < n) && 10 <= n) && 67 <= k)) || ((((i + 1 < n && 84 <= k) && 10 <= m) && j <= 4) && 10 <= n)) || ((((i + 1 < n && 10 <= m) && 10 <= n) && 85 <= k) && j <= 5)) || (((10 <= m && i < n) && 10 <= n) && 100 <= k)) || ((((10 <= m && j + 1 < m) && 10 <= n) && 18 <= k) && i <= 1)) || ((((10 <= m && j + 1 < m) && 10 <= n) && i + 4 < n) && 58 <= k)) || ((((10 <= m && 76 <= k) && 10 <= n) && i + 2 < n) && j + 3 < m)) || ((((10 <= m && 72 <= k) && j <= 2) && 10 <= n) && i + 2 < n)) || ((((i + 1 < n && j + 2 < m) && 10 <= m) && 10 <= n) && 87 <= k)) || ((((10 <= m && 15 <= k) && 10 <= n) && i <= 1) && j <= 5)) || ((((10 <= m && 10 <= n) && 33 <= k) && i <= 3) && j <= 3)) || ((((j + 2 < m && 10 <= m) && i == 0) && 10 <= n) && 7 <= k)) || ((((10 <= m && 10 <= n) && j <= 3) && 43 <= k) && i <= 4)) || ((((10 <= m && j + 1 < m) && 10 <= n) && 48 <= k) && i <= 4)) || ((((10 <= m && i == 0) && 10 <= n) && 1 <= k) && j <= 1)) || ((((10 <= m && 41 <= k) && 10 <= n) && j <= 1) && i <= 4)) || ((((10 <= m && i < n) && 10 <= n) && 96 <= k) && j + 3 < m)) || ((((10 <= m && 10 <= n) && 19 <= k) && j < m) && i <= 1)) || ((((10 <= m && j <= 4) && 10 <= n) && 74 <= k) && i + 2 < n)) || ((((j + 2 < m && 10 <= m) && 27 <= k) && 10 <= n) && i <= 2)) || ((((10 <= m && 10 <= n) && i + 4 < n) && j <= 3) && 53 <= k)) || (((10 <= m && 10 <= n) && 20 <= k) && i <= 1)) || ((((10 <= m && 14 <= k) && j <= 4) && 10 <= n) && i <= 1)) || ((((10 <= m && 10 <= n) && j <= 5) && i + 2 < n) && 75 <= k)) || ((((10 <= m && 10 <= n) && i <= 2) && j + 3 < m) && 26 <= k)) || ((((10 <= m && i < n) && 10 <= n) && 95 <= k) && j <= 5)) || ((((10 <= m && i + 3 < n) && 63 <= k) && 10 <= n) && j <= 3)) || (((10 <= m && i + 3 < n) && 10 <= n) && 70 <= k)) || ((((10 <= m && i < n) && 10 <= n) && 99 <= k) && j < m)) || ((((10 <= m && i + 3 < n) && 10 <= n) && j == 0) && 60 <= k)) || ((((10 <= m && j <= 2) && i < n) && 10 <= n) && 92 <= k)) || ((((10 <= m && 10 <= n) && i + 4 < n) && 50 <= k) && j == 0)) || ((((j + 2 < m && 10 <= m) && 17 <= k) && 10 <= n) && i <= 1)) || ((((10 <= m && 11 <= k) && 10 <= n) && j <= 1) && i <= 1)) || ((((i + 1 < n && 10 <= m) && 10 <= n) && 89 <= k) && j < m)) || ((((10 <= m && 10 <= n) && 56 <= k) && i + 4 < n) && j + 3 < m)) || (((10 <= m && 10 <= n) && i + 4 < n) && 60 <= k)) || ((((10 <= m && 10 <= n) && i <= 3) && 35 <= k) && j <= 5)) || ((((10 <= m && i + 3 < n) && 10 <= n) && j <= 5) && 65 <= k) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.8s, OverallIterations: 7, TraceHistogramMax: 100, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 82.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 236 SDtfs, 448 SDslu, 453 SDs, 0 SdLazy, 434 SolverSat, 157 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 761 GetRequests, 535 SyntacticMatches, 2 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1758 ImplicationChecksByTransitivity, 11.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 5123 NumberOfFragments, 2032 HoareAnnotationTreeSize, 4 FomulaSimplifications, 136435 FormulaSimplificationTreeSizeReduction, 38.6s HoareSimplificationTime, 4 FomulaSimplificationsInter, 22713 FormulaSimplificationTreeSizeReductionInter, 44.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 496 NumberOfCodeBlocks, 490 NumberOfCodeBlocksAsserted, 73 NumberOfCheckSat, 719 ConstructedInterpolants, 0 QuantifiedInterpolants, 197675 SizeOfPredicates, 15 NumberOfNonLiveVariables, 1149 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 19529/21916 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 correct! Received shutdown request...