./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_2.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_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/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_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/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_4aa80ed7-c745-4159-932f-d8bb301e2a3d/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 5d98532a5d518c1ba99a39e0965faf5a69d8ad5bf82f7713684141895d3e8815 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:47:11,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:47:11,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:47:11,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:47:11,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:47:11,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:47:11,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:47:11,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:47:11,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:47:11,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:47:11,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:47:11,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:47:11,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:47:11,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:47:11,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:47:11,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:47:11,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:47:11,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:47:11,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:47:11,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:47:11,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:47:11,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:47:11,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:47:11,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:47:11,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:47:11,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:47:11,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:47:11,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:47:11,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:47:11,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:47:11,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:47:11,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:47:11,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:47:11,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:47:11,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:47:11,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:47:11,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:47:11,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:47:11,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:47:11,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:47:11,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:47:11,821 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:47:11,852 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:47:11,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:47:11,853 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:47:11,854 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:47:11,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:47:11,855 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:47:11,855 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:47:11,856 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:47:11,856 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:47:11,857 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:47:11,857 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:47:11,857 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:47:11,858 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:47:11,858 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:47:11,858 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:47:11,859 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:47:11,859 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:47:11,859 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:47:11,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:47:11,861 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:47:11,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:47:11,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:47:11,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:47:11,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:47:11,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:47:11,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:47:11,863 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:47:11,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:47:11,863 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:47:11,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:47:11,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:47:11,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:47:11,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:47:11,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:47:11,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:47:11,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:47:11,866 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:47:11,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:47:11,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:47:11,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:47:11,867 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:47:11,867 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_4aa80ed7-c745-4159-932f-d8bb301e2a3d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d98532a5d518c1ba99a39e0965faf5a69d8ad5bf82f7713684141895d3e8815 [2021-11-23 16:47:12,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:47:12,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:47:12,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:47:12,258 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:47:12,259 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:47:12,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-programs/partial_mod_count_2.c [2021-11-23 16:47:12,373 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/data/841b2a9e7/fedf5157cf5e4e989007c439bbec73a5/FLAGa8f9ba678 [2021-11-23 16:47:12,929 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:47:12,930 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/sv-benchmarks/c/array-programs/partial_mod_count_2.c [2021-11-23 16:47:12,942 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/data/841b2a9e7/fedf5157cf5e4e989007c439bbec73a5/FLAGa8f9ba678 [2021-11-23 16:47:13,303 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/data/841b2a9e7/fedf5157cf5e4e989007c439bbec73a5 [2021-11-23 16:47:13,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:47:13,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:47:13,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:47:13,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:47:13,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:47:13,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:47:13" (1/1) ... [2021-11-23 16:47:13,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42da67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:13, skipping insertion in model container [2021-11-23 16:47:13,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:47:13" (1/1) ... [2021-11-23 16:47:13,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:47:13,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:47:13,550 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_4aa80ed7-c745-4159-932f-d8bb301e2a3d/sv-benchmarks/c/array-programs/partial_mod_count_2.c[323,336] [2021-11-23 16:47:13,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:47:13,600 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:47:13,620 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_4aa80ed7-c745-4159-932f-d8bb301e2a3d/sv-benchmarks/c/array-programs/partial_mod_count_2.c[323,336] [2021-11-23 16:47:13,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:47:13,658 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:47:13,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:13 WrapperNode [2021-11-23 16:47:13,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:47:13,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:47:13,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:47:13,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:47:13,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:13" (1/1) ... [2021-11-23 16:47:13,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:13" (1/1) ... [2021-11-23 16:47:13,719 INFO L137 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2021-11-23 16:47:13,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:47:13,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:47:13,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:47:13,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:47:13,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:13" (1/1) ... [2021-11-23 16:47:13,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:13" (1/1) ... [2021-11-23 16:47:13,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:13" (1/1) ... [2021-11-23 16:47:13,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:13" (1/1) ... [2021-11-23 16:47:13,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:13" (1/1) ... [2021-11-23 16:47:13,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:13" (1/1) ... [2021-11-23 16:47:13,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:13" (1/1) ... [2021-11-23 16:47:13,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:47:13,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:47:13,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:47:13,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:47:13,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:13" (1/1) ... [2021-11-23 16:47:13,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:47:13,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:13,835 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:47:13,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:47:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:47:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:47:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:47:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 16:47:13,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:47:13,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:47:13,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 16:47:13,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:47:13,993 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:47:13,995 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:47:14,159 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:47:14,192 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 16:47:14,198 INFO L158 Benchmark]: Toolchain (without parser) took 885.98ms. Allocated memory was 88.1MB in the beginning and 113.2MB in the end (delta: 25.2MB). Free memory was 51.6MB in the beginning and 76.4MB in the end (delta: -24.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:47:14,199 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 88.1MB. Free memory is still 68.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:47:14,200 INFO L158 Benchmark]: CACSL2BoogieTranslator took 344.39ms. Allocated memory was 88.1MB in the beginning and 113.2MB in the end (delta: 25.2MB). Free memory was 51.4MB in the beginning and 89.6MB in the end (delta: -38.2MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2021-11-23 16:47:14,203 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.76ms. Allocated memory is still 113.2MB. Free memory was 89.6MB in the beginning and 87.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:47:14,205 INFO L158 Benchmark]: Boogie Preprocessor took 64.53ms. Allocated memory is still 113.2MB. Free memory was 87.8MB in the beginning and 86.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:47:14,206 INFO L158 Benchmark]: RCFGBuilder took 408.50ms. Allocated memory is still 113.2MB. Free memory was 86.7MB in the beginning and 76.4MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 16:47:14,221 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 88.1MB. Free memory is still 68.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 344.39ms. Allocated memory was 88.1MB in the beginning and 113.2MB in the end (delta: 25.2MB). Free memory was 51.4MB in the beginning and 89.6MB in the end (delta: -38.2MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.76ms. Allocated memory is still 113.2MB. Free memory was 89.6MB in the beginning and 87.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.53ms. Allocated memory is still 113.2MB. Free memory was 87.8MB in the beginning and 86.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 408.50ms. Allocated memory is still 113.2MB. Free memory was 86.7MB in the beginning and 76.4MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. 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 16:47:14,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/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_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/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_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/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_4aa80ed7-c745-4159-932f-d8bb301e2a3d/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 5d98532a5d518c1ba99a39e0965faf5a69d8ad5bf82f7713684141895d3e8815 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:47:17,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:47:17,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:47:17,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:47:17,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:47:17,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:47:17,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:47:17,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:47:17,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:47:17,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:47:17,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:47:17,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:47:17,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:47:17,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:47:17,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:47:17,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:47:17,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:47:17,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:47:17,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:47:17,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:47:17,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:47:17,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:47:17,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:47:17,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:47:17,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:47:17,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:47:17,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:47:17,271 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:47:17,272 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:47:17,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:47:17,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:47:17,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:47:17,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:47:17,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:47:17,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:47:17,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:47:17,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:47:17,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:47:17,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:47:17,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:47:17,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:47:17,300 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:47:17,356 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:47:17,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:47:17,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:47:17,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:47:17,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:47:17,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:47:17,360 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:47:17,360 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:47:17,360 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:47:17,361 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:47:17,362 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:47:17,362 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:47:17,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:47:17,364 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:47:17,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:47:17,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:47:17,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:47:17,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:47:17,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:47:17,366 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:47:17,366 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:47:17,367 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:47:17,367 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:47:17,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:47:17,367 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:47:17,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:47:17,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:47:17,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:47:17,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:47:17,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:47:17,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:47:17,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:47:17,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:47:17,370 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:47:17,370 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:17,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:47:17,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:47:17,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:47:17,372 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_4aa80ed7-c745-4159-932f-d8bb301e2a3d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d98532a5d518c1ba99a39e0965faf5a69d8ad5bf82f7713684141895d3e8815 [2021-11-23 16:47:17,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:47:17,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:47:17,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:47:17,852 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:47:17,852 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:47:17,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-programs/partial_mod_count_2.c [2021-11-23 16:47:17,941 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/data/2be7e30da/512e94498f1845a29e9a9400c7e45495/FLAGc0ad8213e [2021-11-23 16:47:18,662 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:47:18,663 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/sv-benchmarks/c/array-programs/partial_mod_count_2.c [2021-11-23 16:47:18,671 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/data/2be7e30da/512e94498f1845a29e9a9400c7e45495/FLAGc0ad8213e [2021-11-23 16:47:19,034 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/data/2be7e30da/512e94498f1845a29e9a9400c7e45495 [2021-11-23 16:47:19,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:47:19,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:47:19,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:47:19,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:47:19,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:47:19,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:47:19" (1/1) ... [2021-11-23 16:47:19,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ea9ac71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:19, skipping insertion in model container [2021-11-23 16:47:19,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:47:19" (1/1) ... [2021-11-23 16:47:19,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:47:19,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:47:19,246 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_4aa80ed7-c745-4159-932f-d8bb301e2a3d/sv-benchmarks/c/array-programs/partial_mod_count_2.c[323,336] [2021-11-23 16:47:19,266 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:47:19,280 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:47:19,296 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_4aa80ed7-c745-4159-932f-d8bb301e2a3d/sv-benchmarks/c/array-programs/partial_mod_count_2.c[323,336] [2021-11-23 16:47:19,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:47:19,337 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:47:19,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:19 WrapperNode [2021-11-23 16:47:19,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:47:19,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:47:19,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:47:19,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:47:19,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:19" (1/1) ... [2021-11-23 16:47:19,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:19" (1/1) ... [2021-11-23 16:47:19,418 INFO L137 Inliner]: procedures = 15, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2021-11-23 16:47:19,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:47:19,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:47:19,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:47:19,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:47:19,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:19" (1/1) ... [2021-11-23 16:47:19,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:19" (1/1) ... [2021-11-23 16:47:19,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:19" (1/1) ... [2021-11-23 16:47:19,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:19" (1/1) ... [2021-11-23 16:47:19,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:19" (1/1) ... [2021-11-23 16:47:19,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:19" (1/1) ... [2021-11-23 16:47:19,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:19" (1/1) ... [2021-11-23 16:47:19,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:47:19,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:47:19,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:47:19,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:47:19,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:19" (1/1) ... [2021-11-23 16:47:19,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:47:19,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:19,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:47:19,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:47:19,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:47:19,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:47:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:47:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 16:47:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:47:19,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:47:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:47:19,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 16:47:19,655 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:47:19,657 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:47:19,999 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:47:20,007 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:47:20,007 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 16:47:20,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:47:20 BoogieIcfgContainer [2021-11-23 16:47:20,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:47:20,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:47:20,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:47:20,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:47:20,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:47:19" (1/3) ... [2021-11-23 16:47:20,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e51a86d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:47:20, skipping insertion in model container [2021-11-23 16:47:20,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:19" (2/3) ... [2021-11-23 16:47:20,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e51a86d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:47:20, skipping insertion in model container [2021-11-23 16:47:20,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:47:20" (3/3) ... [2021-11-23 16:47:20,032 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_2.c [2021-11-23 16:47:20,039 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:47:20,043 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:47:20,151 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:47:20,181 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 16:47:20,181 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:47:20,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 16:47:20,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 16:47:20,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:20,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:20,205 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2021-11-23 16:47:20,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:20,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946715080] [2021-11-23 16:47:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:20,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:20,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:20,233 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:20,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:47:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:20,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 16:47:20,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:20,422 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 16:47:20,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:20,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:20,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946715080] [2021-11-23 16:47:20,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946715080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:20,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:20,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:47:20,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077063892] [2021-11-23 16:47:20,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:20,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 16:47:20,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:20,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 16:47:20,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 16:47:20,480 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 16:47:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:20,502 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-11-23 16:47:20,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 16:47:20,505 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-11-23 16:47:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:20,517 INFO L225 Difference]: With dead ends: 31 [2021-11-23 16:47:20,517 INFO L226 Difference]: Without dead ends: 14 [2021-11-23 16:47:20,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 16:47:20,529 INFO L933 BasicCegarLoop]: 21 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, 21 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 16:47:20,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:47:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-23 16:47:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-23 16:47:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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 16:47:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-23 16:47:20,578 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2021-11-23 16:47:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:20,579 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-23 16:47:20,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 16:47:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-23 16:47:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 16:47:20,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:20,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:20,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:20,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:20,796 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:20,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2021-11-23 16:47:20,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:20,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387407908] [2021-11-23 16:47:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:20,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:20,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:20,800 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:20,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:47:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:20,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:47:20,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:20,975 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 16:47:20,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:20,976 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:20,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387407908] [2021-11-23 16:47:20,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387407908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:20,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:20,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:47:20,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039212883] [2021-11-23 16:47:20,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:20,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:47:20,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:20,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:47:20,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:47:20,981 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 16:47:21,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:21,209 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-11-23 16:47:21,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:47:21,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-23 16:47:21,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:21,216 INFO L225 Difference]: With dead ends: 37 [2021-11-23 16:47:21,216 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 16:47:21,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:47:21,219 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:21,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 14 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:47:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 16:47:21,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-11-23 16:47:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 16:47:21,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-23 16:47:21,227 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2021-11-23 16:47:21,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:21,241 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-23 16:47:21,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 16:47:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-23 16:47:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 16:47:21,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:21,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:21,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:21,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:21,456 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:21,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:21,457 INFO L85 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2021-11-23 16:47:21,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:21,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630065726] [2021-11-23 16:47:21,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:21,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:21,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:21,461 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:21,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:47:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:21,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:47:21,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:21,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:21,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:21,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630065726] [2021-11-23 16:47:21,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630065726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:21,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [281422142] [2021-11-23 16:47:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:21,837 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:21,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:47:21,858 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:47:21,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 16:47:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:22,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:47:22,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:22,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:22,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [281422142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:22,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303363674] [2021-11-23 16:47:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:22,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:22,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:22,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:22,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 16:47:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:22,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:47:22,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:22,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:22,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303363674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:22,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:47:22,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-11-23 16:47:22,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874574197] [2021-11-23 16:47:22,479 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:47:22,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:47:22,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:22,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:47:22,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:47:22,482 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 16:47:22,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:22,935 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-11-23 16:47:22,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:47:22,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 12 [2021-11-23 16:47:22,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:22,938 INFO L225 Difference]: With dead ends: 61 [2021-11-23 16:47:22,938 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 16:47:22,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:47:22,941 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 96 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:22,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 32 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 16:47:22,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 16:47:22,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 24. [2021-11-23 16:47:22,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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 16:47:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-23 16:47:22,951 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2021-11-23 16:47:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:22,952 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-23 16:47:22,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 16:47:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-23 16:47:22,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 16:47:22,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:22,954 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:22,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:23,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:23,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:23,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:23,572 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:23,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:23,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1361285581, now seen corresponding path program 1 times [2021-11-23 16:47:23,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:23,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134229897] [2021-11-23 16:47:23,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:23,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:23,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:23,577 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:23,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:47:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:23,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:47:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:47:24,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:47:25,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:25,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134229897] [2021-11-23 16:47:25,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134229897] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:25,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [28064633] [2021-11-23 16:47:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:25,015 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:25,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:47:25,017 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:47:25,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 16:47:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:25,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:47:25,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:25,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:26,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [28064633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:26,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881421496] [2021-11-23 16:47:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:26,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:26,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:26,937 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:26,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 16:47:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:27,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:47:27,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:47:27,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:47:30,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881421496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:30,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:47:30,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 5, 6] total 21 [2021-11-23 16:47:30,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847845458] [2021-11-23 16:47:30,302 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:47:30,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 16:47:30,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:30,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 16:47:30,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-11-23 16:47:30,305 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 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 16:47:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:33,397 INFO L93 Difference]: Finished difference Result 162 states and 194 transitions. [2021-11-23 16:47:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 16:47:33,404 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 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 21 [2021-11-23 16:47:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:33,408 INFO L225 Difference]: With dead ends: 162 [2021-11-23 16:47:33,408 INFO L226 Difference]: Without dead ends: 148 [2021-11-23 16:47:33,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=300, Invalid=630, Unknown=0, NotChecked=0, Total=930 [2021-11-23 16:47:33,411 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1007 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:33,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1007 Valid, 200 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 16:47:33,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-23 16:47:33,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 51. [2021-11-23 16:47:33,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 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 16:47:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-11-23 16:47:33,445 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 21 [2021-11-23 16:47:33,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:33,445 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-11-23 16:47:33,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 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 16:47:33,446 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-11-23 16:47:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 16:47:33,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:33,448 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:33,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:33,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 16:47:33,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:34,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:34,060 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:34,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:34,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2062709931, now seen corresponding path program 2 times [2021-11-23 16:47:34,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:34,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157480639] [2021-11-23 16:47:34,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:47:34,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:34,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:34,063 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:34,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:47:34,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 16:47:34,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:47:34,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:47:34,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-23 16:47:34,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:34,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:34,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157480639] [2021-11-23 16:47:34,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157480639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:34,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:34,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:47:34,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642528982] [2021-11-23 16:47:34,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:34,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:47:34,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:34,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:47:34,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:47:34,557 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 16:47:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:34,830 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-11-23 16:47:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:47:34,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 48 [2021-11-23 16:47:34,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:34,833 INFO L225 Difference]: With dead ends: 70 [2021-11-23 16:47:34,833 INFO L226 Difference]: Without dead ends: 68 [2021-11-23 16:47:34,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:47:34,835 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:34,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 32 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:47:34,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-23 16:47:34,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2021-11-23 16:47:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 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 16:47:34,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-11-23 16:47:34,849 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 48 [2021-11-23 16:47:34,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:34,850 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-11-23 16:47:34,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 16:47:34,851 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-11-23 16:47:34,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 16:47:34,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:34,853 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:34,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:35,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:35,071 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:35,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:35,071 INFO L85 PathProgramCache]: Analyzing trace with hash 160067678, now seen corresponding path program 1 times [2021-11-23 16:47:35,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:35,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383085426] [2021-11-23 16:47:35,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:35,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:35,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:35,073 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:35,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:47:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:35,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:47:35,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 16:47:35,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 16:47:40,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:40,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383085426] [2021-11-23 16:47:40,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383085426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:40,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1232639884] [2021-11-23 16:47:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:40,447 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:40,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:47:40,451 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:47:40,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 16:47:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:41,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 16:47:41,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:47:41,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:47:48,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1232639884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:48,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191787366] [2021-11-23 16:47:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:48,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:48,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:48,642 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:48,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 16:47:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:48,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:47:48,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-23 16:47:49,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-23 16:47:59,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191787366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:59,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:47:59,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 16, 16, 7, 8] total 53 [2021-11-23 16:47:59,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404990497] [2021-11-23 16:47:59,140 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:47:59,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-23 16:47:59,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:59,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-23 16:47:59,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 16:47:59,145 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 54 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 53 states have internal predecessors, (161), 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 16:52:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:21,999 INFO L93 Difference]: Finished difference Result 1707 states and 2131 transitions. [2021-11-23 16:52:22,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 389 states. [2021-11-23 16:52:22,001 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 53 states have internal predecessors, (161), 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 54 [2021-11-23 16:52:22,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:22,021 INFO L225 Difference]: With dead ends: 1707 [2021-11-23 16:52:22,021 INFO L226 Difference]: Without dead ends: 1669 [2021-11-23 16:52:22,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 427 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91566 ImplicationChecksByTransitivity, 259.3s TimeCoverageRelationStatistics Valid=41068, Invalid=142544, Unknown=0, NotChecked=0, Total=183612 [2021-11-23 16:52:22,104 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 6308 mSDsluCounter, 3438 mSDsCounter, 0 mSdLazyCounter, 8253 mSolverCounterSat, 2707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6308 SdHoareTripleChecker+Valid, 3635 SdHoareTripleChecker+Invalid, 10960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2707 IncrementalHoareTripleChecker+Valid, 8253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:22,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6308 Valid, 3635 Invalid, 10960 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2707 Valid, 8253 Invalid, 0 Unknown, 0 Unchecked, 19.2s Time] [2021-11-23 16:52:22,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-11-23 16:52:22,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 159. [2021-11-23 16:52:22,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.1455696202531647) internal successors, (181), 158 states have internal predecessors, (181), 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 16:52:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 181 transitions. [2021-11-23 16:52:22,265 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 181 transitions. Word has length 54 [2021-11-23 16:52:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:22,266 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 181 transitions. [2021-11-23 16:52:22,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 53 states have internal predecessors, (161), 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 16:52:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 181 transitions. [2021-11-23 16:52:22,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 16:52:22,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:22,278 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 23, 14, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:22,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-23 16:52:22,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:22,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:22,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:22,884 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:22,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:22,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1786127212, now seen corresponding path program 2 times [2021-11-23 16:52:22,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:22,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398399304] [2021-11-23 16:52:22,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:52:22,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:22,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:22,888 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:22,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 16:52:23,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:52:23,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:52:23,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 16:52:23,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2115 backedges. 970 proven. 805 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2021-11-23 16:52:25,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2115 backedges. 970 proven. 805 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2021-11-23 16:52:50,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:50,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398399304] [2021-11-23 16:52:50,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398399304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:50,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1695284007] [2021-11-23 16:52:50,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:52:50,386 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:50,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:52:50,387 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:52:50,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 16:52:52,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:52:52,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:52:52,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 16:52:52,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2115 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-23 16:52:54,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2115 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-23 16:53:50,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1695284007] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:50,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882989713] [2021-11-23 16:53:50,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:53:50,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:53:50,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:53:50,207 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:53:50,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aa80ed7-c745-4159-932f-d8bb301e2a3d/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 16:53:50,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:53:50,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:53:50,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:53:50,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2115 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-23 16:53:53,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:54:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2115 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-23 16:54:30,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882989713] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:30,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:54:30,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 40, 40, 11, 12] total 124 [2021-11-23 16:54:30,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164237472] [2021-11-23 16:54:30,855 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:54:30,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-11-23 16:54:30,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:30,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-11-23 16:54:30,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2871, Invalid=12629, Unknown=0, NotChecked=0, Total=15500 [2021-11-23 16:54:30,860 INFO L87 Difference]: Start difference. First operand 159 states and 181 transitions. Second operand has 125 states, 125 states have (on average 3.184) internal successors, (398), 124 states have internal predecessors, (398), 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)