./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifcompf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifcompf.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl --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 c976745169334e455668d4a00daf76f0c92e9088cf6a3d705adecbf8b82b6740 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:21:42,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:21:42,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:21:42,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:21:42,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:21:42,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:21:42,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:21:42,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:21:42,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:21:42,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:21:42,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:21:42,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:21:42,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:21:42,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:21:42,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:21:42,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:21:42,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:21:42,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:21:42,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:21:42,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:21:42,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:21:42,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:21:42,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:21:42,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:21:42,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:21:42,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:21:42,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:21:42,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:21:42,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:21:42,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:21:42,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:21:42,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:21:42,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:21:42,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:21:42,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:21:42,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:21:42,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:21:42,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:21:42,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:21:42,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:21:42,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:21:42,802 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:21:42,840 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:21:42,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:21:42,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:21:42,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:21:42,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:21:42,848 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:21:42,848 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:21:42,849 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:21:42,849 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:21:42,849 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:21:42,851 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:21:42,851 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:21:42,851 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:21:42,851 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:21:42,852 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:21:42,852 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:21:42,852 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:21:42,852 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:21:42,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:21:42,854 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:21:42,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:21:42,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:21:42,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:21:42,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:21:42,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:21:42,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:21:42,858 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:21:42,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:21:42,858 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:21:42,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:21:42,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:21:42,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:21:42,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:21:42,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:21:42,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:21:42,861 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:21:42,861 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:21:42,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:21:42,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:21:42,862 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:21:42,862 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:21:42,862 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_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c976745169334e455668d4a00daf76f0c92e9088cf6a3d705adecbf8b82b6740 [2021-11-23 17:21:43,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:21:43,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:21:43,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:21:43,201 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:21:43,202 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:21:43,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-fpi/ifcompf.c [2021-11-23 17:21:43,278 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/data/c9c4eca23/2466e8857f0f49e78321aa8d11e11109/FLAGd7dec7aff [2021-11-23 17:21:43,771 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:21:43,776 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/sv-benchmarks/c/array-fpi/ifcompf.c [2021-11-23 17:21:43,786 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/data/c9c4eca23/2466e8857f0f49e78321aa8d11e11109/FLAGd7dec7aff [2021-11-23 17:21:44,149 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/data/c9c4eca23/2466e8857f0f49e78321aa8d11e11109 [2021-11-23 17:21:44,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:21:44,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:21:44,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:21:44,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:21:44,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:21:44,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:21:44" (1/1) ... [2021-11-23 17:21:44,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@791bdc5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:44, skipping insertion in model container [2021-11-23 17:21:44,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:21:44" (1/1) ... [2021-11-23 17:21:44,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:21:44,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:21:44,409 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/sv-benchmarks/c/array-fpi/ifcompf.c[590,603] [2021-11-23 17:21:44,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:21:44,452 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:21:44,464 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/sv-benchmarks/c/array-fpi/ifcompf.c[590,603] [2021-11-23 17:21:44,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:21:44,489 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:21:44,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:44 WrapperNode [2021-11-23 17:21:44,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:21:44,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:21:44,490 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:21:44,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:21:44,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:44" (1/1) ... [2021-11-23 17:21:44,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:44" (1/1) ... [2021-11-23 17:21:44,529 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2021-11-23 17:21:44,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:21:44,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:21:44,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:21:44,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:21:44,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:44" (1/1) ... [2021-11-23 17:21:44,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:44" (1/1) ... [2021-11-23 17:21:44,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:44" (1/1) ... [2021-11-23 17:21:44,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:44" (1/1) ... [2021-11-23 17:21:44,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:44" (1/1) ... [2021-11-23 17:21:44,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:44" (1/1) ... [2021-11-23 17:21:44,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:44" (1/1) ... [2021-11-23 17:21:44,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:21:44,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:21:44,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:21:44,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:21:44,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:44" (1/1) ... [2021-11-23 17:21:44,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:21:44,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:21:44,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:21:44,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:21:44,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:21:44,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:21:44,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:21:44,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:21:44,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:21:44,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:21:44,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:21:44,744 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:21:44,746 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:21:44,962 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:21:44,997 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:21:45,003 INFO L158 Benchmark]: Toolchain (without parser) took 840.92ms. Allocated memory is still 107.0MB. Free memory was 76.9MB in the beginning and 67.0MB in the end (delta: 10.0MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. [2021-11-23 17:21:45,004 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 107.0MB. Free memory was 64.7MB in the beginning and 64.6MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:21:45,006 INFO L158 Benchmark]: CACSL2BoogieTranslator took 324.21ms. Allocated memory is still 107.0MB. Free memory was 76.9MB in the beginning and 82.0MB in the end (delta: -5.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:21:45,007 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.45ms. Allocated memory is still 107.0MB. Free memory was 82.0MB in the beginning and 80.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:21:45,008 INFO L158 Benchmark]: Boogie Preprocessor took 34.69ms. Allocated memory is still 107.0MB. Free memory was 80.3MB in the beginning and 79.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:21:45,010 INFO L158 Benchmark]: RCFGBuilder took 434.52ms. Allocated memory is still 107.0MB. Free memory was 78.8MB in the beginning and 67.0MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 17:21:45,016 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 107.0MB. Free memory was 64.7MB in the beginning and 64.6MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 324.21ms. Allocated memory is still 107.0MB. Free memory was 76.9MB in the beginning and 82.0MB in the end (delta: -5.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.45ms. Allocated memory is still 107.0MB. Free memory was 82.0MB in the beginning and 80.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 34.69ms. Allocated memory is still 107.0MB. Free memory was 80.3MB in the beginning and 79.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 434.52ms. Allocated memory is still 107.0MB. Free memory was 78.8MB in the beginning and 67.0MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:21:45,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifcompf.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl --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 c976745169334e455668d4a00daf76f0c92e9088cf6a3d705adecbf8b82b6740 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:21:48,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:21:48,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:21:48,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:21:48,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:21:48,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:21:48,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:21:48,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:21:48,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:21:48,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:21:48,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:21:48,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:21:48,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:21:48,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:21:48,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:21:48,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:21:48,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:21:48,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:21:48,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:21:48,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:21:48,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:21:48,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:21:48,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:21:48,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:21:48,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:21:48,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:21:48,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:21:48,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:21:48,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:21:48,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:21:48,163 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:21:48,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:21:48,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:21:48,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:21:48,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:21:48,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:21:48,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:21:48,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:21:48,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:21:48,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:21:48,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:21:48,178 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:21:48,256 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:21:48,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:21:48,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:21:48,258 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:21:48,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:21:48,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:21:48,259 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:21:48,260 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:21:48,260 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:21:48,260 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:21:48,262 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:21:48,262 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:21:48,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:21:48,265 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:21:48,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:21:48,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:21:48,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:21:48,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:21:48,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:21:48,266 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:21:48,267 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:21:48,267 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:21:48,267 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:21:48,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:21:48,268 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:21:48,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:21:48,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:21:48,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:21:48,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:21:48,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:21:48,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:21:48,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:21:48,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:21:48,271 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:21:48,271 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:21:48,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:21:48,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:21:48,273 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:21:48,273 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c976745169334e455668d4a00daf76f0c92e9088cf6a3d705adecbf8b82b6740 [2021-11-23 17:21:48,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:21:48,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:21:48,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:21:48,746 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:21:48,747 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:21:48,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-fpi/ifcompf.c [2021-11-23 17:21:48,841 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/data/f02ef7977/f8fd90a48cee459e89a320dc8c0b9b44/FLAG02e0d6f7e [2021-11-23 17:21:49,566 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:21:49,567 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/sv-benchmarks/c/array-fpi/ifcompf.c [2021-11-23 17:21:49,580 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/data/f02ef7977/f8fd90a48cee459e89a320dc8c0b9b44/FLAG02e0d6f7e [2021-11-23 17:21:49,904 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/data/f02ef7977/f8fd90a48cee459e89a320dc8c0b9b44 [2021-11-23 17:21:49,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:21:49,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:21:49,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:21:49,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:21:49,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:21:49,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:21:49" (1/1) ... [2021-11-23 17:21:49,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c53bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:49, skipping insertion in model container [2021-11-23 17:21:49,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:21:49" (1/1) ... [2021-11-23 17:21:49,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:21:49,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:21:50,245 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/sv-benchmarks/c/array-fpi/ifcompf.c[590,603] [2021-11-23 17:21:50,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:21:50,298 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:21:50,314 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/sv-benchmarks/c/array-fpi/ifcompf.c[590,603] [2021-11-23 17:21:50,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:21:50,354 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:21:50,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:50 WrapperNode [2021-11-23 17:21:50,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:21:50,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:21:50,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:21:50,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:21:50,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:50" (1/1) ... [2021-11-23 17:21:50,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:50" (1/1) ... [2021-11-23 17:21:50,400 INFO L137 Inliner]: procedures = 18, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2021-11-23 17:21:50,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:21:50,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:21:50,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:21:50,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:21:50,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:50" (1/1) ... [2021-11-23 17:21:50,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:50" (1/1) ... [2021-11-23 17:21:50,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:50" (1/1) ... [2021-11-23 17:21:50,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:50" (1/1) ... [2021-11-23 17:21:50,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:50" (1/1) ... [2021-11-23 17:21:50,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:50" (1/1) ... [2021-11-23 17:21:50,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:50" (1/1) ... [2021-11-23 17:21:50,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:21:50,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:21:50,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:21:50,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:21:50,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:50" (1/1) ... [2021-11-23 17:21:50,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:21:50,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:21:50,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:21:50,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:21:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:21:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:21:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-23 17:21:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:21:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:21:50,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:21:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-23 17:21:50,686 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:21:50,689 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:21:51,043 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:21:51,051 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:21:51,051 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 17:21:51,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:21:51 BoogieIcfgContainer [2021-11-23 17:21:51,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:21:51,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:21:51,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:21:51,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:21:51,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:21:49" (1/3) ... [2021-11-23 17:21:51,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61662d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:21:51, skipping insertion in model container [2021-11-23 17:21:51,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:50" (2/3) ... [2021-11-23 17:21:51,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61662d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:21:51, skipping insertion in model container [2021-11-23 17:21:51,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:21:51" (3/3) ... [2021-11-23 17:21:51,065 INFO L111 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2021-11-23 17:21:51,072 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:21:51,072 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:21:51,152 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:21:51,174 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:21:51,175 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:21:51,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:51,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 17:21:51,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:51,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:51,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:51,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:51,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1152450264, now seen corresponding path program 1 times [2021-11-23 17:21:51,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:51,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131769784] [2021-11-23 17:21:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:51,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:51,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:51,242 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:51,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:21:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:51,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:21:51,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:51,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:51,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:51,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131769784] [2021-11-23 17:21:51,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131769784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:51,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:51,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:21:51,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57916024] [2021-11-23 17:21:51,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:51,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:21:51,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:21:51,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:21:51,617 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:51,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:51,645 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2021-11-23 17:21:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:21:51,647 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 17:21:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:51,659 INFO L225 Difference]: With dead ends: 50 [2021-11-23 17:21:51,660 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 17:21:51,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:21:51,672 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:51,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:21:51,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 17:21:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-23 17:21:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-11-23 17:21:51,725 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2021-11-23 17:21:51,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:51,725 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-11-23 17:21:51,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-11-23 17:21:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 17:21:51,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:51,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:51,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:51,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:51,944 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:51,948 INFO L85 PathProgramCache]: Analyzing trace with hash 670750212, now seen corresponding path program 1 times [2021-11-23 17:21:51,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:51,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942229323] [2021-11-23 17:21:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:51,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:51,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:51,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:52,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:21:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:52,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:21:52,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:52,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:52,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:52,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942229323] [2021-11-23 17:21:52,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942229323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:52,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:52,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:21:52,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349620097] [2021-11-23 17:21:52,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:52,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:21:52,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:52,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:21:52,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:21:52,432 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:52,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:52,875 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-11-23 17:21:52,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:21:52,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 17:21:52,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:52,883 INFO L225 Difference]: With dead ends: 56 [2021-11-23 17:21:52,883 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 17:21:52,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:21:52,886 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:52,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 17 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:21:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 17:21:52,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-11-23 17:21:52,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-11-23 17:21:52,907 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 14 [2021-11-23 17:21:52,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:52,908 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-11-23 17:21:52,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-11-23 17:21:52,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 17:21:52,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:52,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:52,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:53,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:53,129 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:53,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:53,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1978137699, now seen corresponding path program 1 times [2021-11-23 17:21:53,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:53,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863751637] [2021-11-23 17:21:53,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:53,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:53,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:53,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:53,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:21:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:53,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:21:53,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:53,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:53,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:53,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 17:21:53,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:21:53,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-11-23 17:21:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:21:53,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:53,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:53,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863751637] [2021-11-23 17:21:53,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863751637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:53,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:53,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 17:21:53,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146010860] [2021-11-23 17:21:53,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:53,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:21:53,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:53,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:21:53,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:21:53,629 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:54,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:54,041 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-11-23 17:21:54,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:21:54,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 17:21:54,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:54,044 INFO L225 Difference]: With dead ends: 46 [2021-11-23 17:21:54,044 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 17:21:54,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:21:54,046 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:54,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 81 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:21:54,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 17:21:54,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-11-23 17:21:54,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-23 17:21:54,062 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2021-11-23 17:21:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:54,063 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-23 17:21:54,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-23 17:21:54,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 17:21:54,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:54,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:54,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:54,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:54,292 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:54,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1659346963, now seen corresponding path program 1 times [2021-11-23 17:21:54,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:54,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813475325] [2021-11-23 17:21:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:54,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:54,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:54,296 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:54,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:21:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:54,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:21:54,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:21:54,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:54,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:54,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813475325] [2021-11-23 17:21:54,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813475325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:54,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:54,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 17:21:54,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517276896] [2021-11-23 17:21:54,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:54,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:21:54,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:54,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:21:54,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:21:54,816 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:55,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:55,548 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2021-11-23 17:21:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:21:55,549 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 17:21:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:55,551 INFO L225 Difference]: With dead ends: 96 [2021-11-23 17:21:55,551 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 17:21:55,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:21:55,553 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 168 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:55,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 33 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 17:21:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 17:21:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2021-11-23 17:21:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-11-23 17:21:55,564 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 26 [2021-11-23 17:21:55,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:55,565 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-11-23 17:21:55,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-11-23 17:21:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 17:21:55,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:55,567 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:55,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:55,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:55,781 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:55,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:55,782 INFO L85 PathProgramCache]: Analyzing trace with hash -643446870, now seen corresponding path program 1 times [2021-11-23 17:21:55,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:55,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981607809] [2021-11-23 17:21:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:55,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:55,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:55,785 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:55,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:21:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:56,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:21:56,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:56,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:56,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:56,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 17:21:56,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:56,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:56,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:56,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:56,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:56,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:56,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:21:56,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:21:56,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:21:56,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-11-23 17:21:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:21:56,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:57,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2021-11-23 17:21:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:21:58,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:58,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981607809] [2021-11-23 17:21:58,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981607809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:58,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1269953840] [2021-11-23 17:21:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:58,674 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:21:58,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:21:58,679 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:21:58,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:21:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:59,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:21:59,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:59,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:59,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:59,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 17:21:59,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:59,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:59,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:59,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:59,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:59,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:59,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:21:59,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:21:59,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:21:59,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-11-23 17:21:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:21:59,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:59,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2021-11-23 17:22:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:22:00,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1269953840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:00,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327080466] [2021-11-23 17:22:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:00,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:22:00,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:22:00,605 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:22:00,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 17:22:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:00,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:22:00,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:00,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:22:00,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:00,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 17:22:01,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:01,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:01,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:01,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:01,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:01,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:01,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:22:01,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:22:01,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:22:01,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2021-11-23 17:22:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:22:01,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:01,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 64 [2021-11-23 17:22:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:22:01,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327080466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:01,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:22:01,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 9, 8] total 15 [2021-11-23 17:22:01,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247414378] [2021-11-23 17:22:01,692 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:22:01,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 17:22:01,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:01,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 17:22:01,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-23 17:22:01,695 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:04,833 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2021-11-23 17:22:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 17:22:04,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-23 17:22:04,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:04,842 INFO L225 Difference]: With dead ends: 80 [2021-11-23 17:22:04,842 INFO L226 Difference]: Without dead ends: 78 [2021-11-23 17:22:04,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-11-23 17:22:04,844 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:04,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 86 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 129 Invalid, 0 Unknown, 47 Unchecked, 0.9s Time] [2021-11-23 17:22:04,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-23 17:22:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2021-11-23 17:22:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2021-11-23 17:22:04,857 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 32 [2021-11-23 17:22:04,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:04,857 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2021-11-23 17:22:04,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:04,858 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2021-11-23 17:22:04,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 17:22:04,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:04,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:04,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:05,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 17:22:05,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:05,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:22:05,464 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:05,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2051071008, now seen corresponding path program 1 times [2021-11-23 17:22:05,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:05,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298489152] [2021-11-23 17:22:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:05,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:05,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:05,467 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:05,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ddf79c-95a3-455c-b5b2-0e8589aabb58/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:22:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:05,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 17:22:05,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:05,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 102 [2021-11-23 17:22:06,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 17:22:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:22:06,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:22:06,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-11-23 17:22:06,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:22:06,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:22:06,703 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 17:22:06,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 75 [2021-11-23 17:22:07,255 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:22:07,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 119 treesize of output 59 [2021-11-23 17:22:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:22:07,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:11,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:22:13,745 INFO L354 Elim1Store]: treesize reduction 203, result has 23.7 percent of original size [2021-11-23 17:22:13,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 262755410 treesize of output 132732048 [2021-11-23 17:24:15,871 WARN L227 SmtUtils]: Spent 2.04m on a formula simplification that was a NOOP. DAG size: 2832 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 17:26:10,192 WARN L227 SmtUtils]: Spent 1.90m on a formula simplification that was a NOOP. DAG size: 2826 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 17:26:10,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:26:10,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143348854 treesize of output 132600954 [2021-11-23 17:28:06,417 WARN L227 SmtUtils]: Spent 1.93m on a formula simplification that was a NOOP. DAG size: 2828 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)