./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s5lif.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_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/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_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s5lif.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/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_aa39f33b-dc34-44cd-a1de-033a112a7db4/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 ee6d96902bdd4af72f7a2fd5e7663f1e77332d6bd0663b847529c708e308110b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:46:12,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:46:12,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:46:12,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:46:12,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:46:12,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:46:12,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:46:12,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:46:12,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:46:12,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:46:12,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:46:12,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:46:12,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:46:12,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:46:12,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:46:12,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:46:12,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:46:12,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:46:12,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:46:12,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:46:12,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:46:12,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:46:12,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:46:12,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:46:12,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:46:12,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:46:12,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:46:12,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:46:12,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:46:12,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:46:12,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:46:12,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:46:12,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:46:12,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:46:12,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:46:12,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:46:12,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:46:12,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:46:12,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:46:12,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:46:12,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:46:12,826 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:46:12,854 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:46:12,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:46:12,855 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:46:12,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:46:12,857 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:46:12,857 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:46:12,857 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:46:12,858 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:46:12,858 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:46:12,859 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:46:12,859 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:46:12,859 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:46:12,860 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:46:12,860 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:46:12,861 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:46:12,861 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:46:12,862 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:46:12,862 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:46:12,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:46:12,863 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:46:12,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:46:12,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:46:12,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:46:12,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:46:12,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:46:12,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:46:12,866 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:46:12,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:46:12,866 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:46:12,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:46:12,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:46:12,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:46:12,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:46:12,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:46:12,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:46:12,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:46:12,869 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:46:12,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:46:12,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:46:12,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:46:12,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:46:12,870 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_aa39f33b-dc34-44cd-a1de-033a112a7db4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee6d96902bdd4af72f7a2fd5e7663f1e77332d6bd0663b847529c708e308110b [2021-11-23 16:46:13,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:46:13,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:46:13,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:46:13,197 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:46:13,198 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:46:13,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-fpi/s5lif.c [2021-11-23 16:46:13,288 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/data/4d3fcaae1/98999da3380e44ebbbf3eb53dcb5222a/FLAGdbdb48982 [2021-11-23 16:46:13,813 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:46:13,814 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/sv-benchmarks/c/array-fpi/s5lif.c [2021-11-23 16:46:13,821 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/data/4d3fcaae1/98999da3380e44ebbbf3eb53dcb5222a/FLAGdbdb48982 [2021-11-23 16:46:14,167 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/data/4d3fcaae1/98999da3380e44ebbbf3eb53dcb5222a [2021-11-23 16:46:14,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:46:14,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:46:14,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:46:14,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:46:14,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:46:14,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64446e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14, skipping insertion in model container [2021-11-23 16:46:14,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:46:14,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:46:14,389 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_aa39f33b-dc34-44cd-a1de-033a112a7db4/sv-benchmarks/c/array-fpi/s5lif.c[588,601] [2021-11-23 16:46:14,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:46:14,417 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:46:14,429 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_aa39f33b-dc34-44cd-a1de-033a112a7db4/sv-benchmarks/c/array-fpi/s5lif.c[588,601] [2021-11-23 16:46:14,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:46:14,453 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:46:14,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14 WrapperNode [2021-11-23 16:46:14,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:46:14,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:46:14,455 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:46:14,455 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:46:14,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,490 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2021-11-23 16:46:14,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:46:14,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:46:14,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:46:14,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:46:14,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:46:14,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:46:14,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:46:14,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:46:14,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:14" (1/1) ... [2021-11-23 16:46:14,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:46:14,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:14,594 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:46:14,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:46:14,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:46:14,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:46:14,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:46:14,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 16:46:14,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 16:46:14,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:46:14,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:46:14,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 16:46:14,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:46:14,711 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:46:14,713 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:46:14,920 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:46:14,943 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 16:46:14,962 INFO L158 Benchmark]: Toolchain (without parser) took 790.69ms. Allocated memory is still 92.3MB. Free memory was 61.8MB in the beginning and 54.3MB in the end (delta: 7.4MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-11-23 16:46:14,963 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 92.3MB. Free memory was 45.4MB in the beginning and 45.3MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:46:14,964 INFO L158 Benchmark]: CACSL2BoogieTranslator took 281.68ms. Allocated memory is still 92.3MB. Free memory was 61.6MB in the beginning and 68.2MB in the end (delta: -6.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 16:46:14,965 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.57ms. Allocated memory is still 92.3MB. Free memory was 68.2MB in the beginning and 66.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:46:14,966 INFO L158 Benchmark]: Boogie Preprocessor took 62.90ms. Allocated memory is still 92.3MB. Free memory was 66.5MB in the beginning and 65.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:46:14,967 INFO L158 Benchmark]: RCFGBuilder took 405.06ms. Allocated memory is still 92.3MB. Free memory was 65.3MB in the beginning and 54.3MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 16:46:14,971 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 92.3MB. Free memory was 45.4MB in the beginning and 45.3MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 281.68ms. Allocated memory is still 92.3MB. Free memory was 61.6MB in the beginning and 68.2MB in the end (delta: -6.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.57ms. Allocated memory is still 92.3MB. Free memory was 68.2MB in the beginning and 66.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 62.90ms. Allocated memory is still 92.3MB. Free memory was 66.5MB in the beginning and 65.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 405.06ms. Allocated memory is still 92.3MB. Free memory was 65.3MB in the beginning and 54.3MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:46:15,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/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_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/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_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s5lif.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/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_aa39f33b-dc34-44cd-a1de-033a112a7db4/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 ee6d96902bdd4af72f7a2fd5e7663f1e77332d6bd0663b847529c708e308110b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:46:17,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:46:17,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:46:17,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:46:17,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:46:17,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:46:17,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:46:17,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:46:17,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:46:17,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:46:17,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:46:17,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:46:17,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:46:17,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:46:17,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:46:17,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:46:17,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:46:17,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:46:17,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:46:17,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:46:17,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:46:17,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:46:17,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:46:17,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:46:17,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:46:17,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:46:17,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:46:17,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:46:17,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:46:17,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:46:17,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:46:17,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:46:17,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:46:17,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:46:17,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:46:17,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:46:17,668 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:46:17,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:46:17,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:46:17,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:46:17,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:46:17,672 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:46:17,707 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:46:17,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:46:17,708 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:46:17,709 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:46:17,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:46:17,710 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:46:17,710 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:46:17,710 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:46:17,711 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:46:17,711 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:46:17,712 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:46:17,712 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:46:17,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:46:17,714 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:46:17,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:46:17,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:46:17,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:46:17,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:46:17,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:46:17,716 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:46:17,716 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:46:17,717 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:46:17,717 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:46:17,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:46:17,717 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:46:17,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:46:17,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:46:17,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:46:17,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:46:17,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:46:17,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:46:17,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:46:17,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:46:17,720 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:46:17,720 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:17,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:46:17,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:46:17,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:46:17,722 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_aa39f33b-dc34-44cd-a1de-033a112a7db4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee6d96902bdd4af72f7a2fd5e7663f1e77332d6bd0663b847529c708e308110b [2021-11-23 16:46:18,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:46:18,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:46:18,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:46:18,168 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:46:18,169 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:46:18,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-fpi/s5lif.c [2021-11-23 16:46:18,258 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/data/3fbbcc15c/212d76ac9e6b4fa58f2f88b66564082c/FLAG2a9a701f6 [2021-11-23 16:46:18,872 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:46:18,873 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/sv-benchmarks/c/array-fpi/s5lif.c [2021-11-23 16:46:18,882 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/data/3fbbcc15c/212d76ac9e6b4fa58f2f88b66564082c/FLAG2a9a701f6 [2021-11-23 16:46:19,222 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/data/3fbbcc15c/212d76ac9e6b4fa58f2f88b66564082c [2021-11-23 16:46:19,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:46:19,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:46:19,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:46:19,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:46:19,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:46:19,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:46:19" (1/1) ... [2021-11-23 16:46:19,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5124d7f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:19, skipping insertion in model container [2021-11-23 16:46:19,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:46:19" (1/1) ... [2021-11-23 16:46:19,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:46:19,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:46:19,459 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_aa39f33b-dc34-44cd-a1de-033a112a7db4/sv-benchmarks/c/array-fpi/s5lif.c[588,601] [2021-11-23 16:46:19,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:46:19,494 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:46:19,528 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_aa39f33b-dc34-44cd-a1de-033a112a7db4/sv-benchmarks/c/array-fpi/s5lif.c[588,601] [2021-11-23 16:46:19,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:46:19,570 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:46:19,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:19 WrapperNode [2021-11-23 16:46:19,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:46:19,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:46:19,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:46:19,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:46:19,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:19" (1/1) ... [2021-11-23 16:46:19,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:19" (1/1) ... [2021-11-23 16:46:19,608 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2021-11-23 16:46:19,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:46:19,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:46:19,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:46:19,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:46:19,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:19" (1/1) ... [2021-11-23 16:46:19,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:19" (1/1) ... [2021-11-23 16:46:19,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:19" (1/1) ... [2021-11-23 16:46:19,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:19" (1/1) ... [2021-11-23 16:46:19,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:19" (1/1) ... [2021-11-23 16:46:19,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:19" (1/1) ... [2021-11-23 16:46:19,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:19" (1/1) ... [2021-11-23 16:46:19,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:46:19,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:46:19,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:46:19,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:46:19,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:19" (1/1) ... [2021-11-23 16:46:19,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:46:19,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:19,705 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:46:19,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:46:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:46:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-23 16:46:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 16:46:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 16:46:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:46:19,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:46:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-23 16:46:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:46:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 16:46:19,885 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:46:19,887 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:46:20,078 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:46:20,084 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:46:20,084 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 16:46:20,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:46:20 BoogieIcfgContainer [2021-11-23 16:46:20,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:46:20,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:46:20,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:46:20,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:46:20,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:46:19" (1/3) ... [2021-11-23 16:46:20,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4546678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:46:20, skipping insertion in model container [2021-11-23 16:46:20,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:46:19" (2/3) ... [2021-11-23 16:46:20,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4546678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:46:20, skipping insertion in model container [2021-11-23 16:46:20,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:46:20" (3/3) ... [2021-11-23 16:46:20,096 INFO L111 eAbstractionObserver]: Analyzing ICFG s5lif.c [2021-11-23 16:46:20,102 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:46:20,102 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:46:20,184 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:46:20,191 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 16:46:20,202 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:46:20,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 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 16:46:20,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 16:46:20,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:20,235 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:20,235 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:20,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:20,245 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2021-11-23 16:46:20,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:20,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288818501] [2021-11-23 16:46:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:20,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:20,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:20,267 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:20,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:46:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:20,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 16:46:20,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:20,481 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 16:46:20,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:20,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:20,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288818501] [2021-11-23 16:46:20,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288818501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:20,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:20,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:46:20,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987809685] [2021-11-23 16:46:20,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:20,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 16:46:20,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:20,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 16:46:20,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 16:46:20,531 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 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 6.5) internal successors, (13), 2 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 16:46:20,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:20,548 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-11-23 16:46:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 16:46:20,550 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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 13 [2021-11-23 16:46:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:20,557 INFO L225 Difference]: With dead ends: 40 [2021-11-23 16:46:20,558 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 16:46:20,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 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 16:46:20,565 INFO L933 BasicCegarLoop]: 26 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, 26 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 16:46:20,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:46:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 16:46:20,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-23 16:46:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 16:46:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-23 16:46:20,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2021-11-23 16:46:20,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:20,609 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-23 16:46:20,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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 16:46:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-23 16:46:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 16:46:20,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:20,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:20,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:20,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:20,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:20,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:20,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2021-11-23 16:46:20,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:20,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965802731] [2021-11-23 16:46:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:20,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:20,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:20,826 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:20,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:46:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:20,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:46:20,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:21,078 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 16:46:21,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:21,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:21,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965802731] [2021-11-23 16:46:21,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965802731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:21,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:21,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:46:21,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881762116] [2021-11-23 16:46:21,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:21,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:46:21,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:21,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:46:21,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:21,083 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.6) 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 16:46:21,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:21,249 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-11-23 16:46:21,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:46:21,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) 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 13 [2021-11-23 16:46:21,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:21,251 INFO L225 Difference]: With dead ends: 36 [2021-11-23 16:46:21,251 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 16:46:21,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:46:21,254 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:21,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 9 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:46:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 16:46:21,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-11-23 16:46:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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 16:46:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-23 16:46:21,262 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-11-23 16:46:21,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:21,262 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-23 16:46:21,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) 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 16:46:21,263 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-23 16:46:21,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 16:46:21,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:21,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:21,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:21,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:21,475 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:21,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:21,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2021-11-23 16:46:21,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:21,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407036623] [2021-11-23 16:46:21,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:21,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:21,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:21,479 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:21,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:46:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:21,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 16:46:21,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:21,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 16:46:21,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:21,925 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-23 16:46:21,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 16:46:22,027 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 16:46:22,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2021-11-23 16:46:22,496 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 16:46:22,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 36 [2021-11-23 16:46:22,858 INFO L354 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2021-11-23 16:46:22,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 46 [2021-11-23 16:46:23,119 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 16:46:23,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 50 [2021-11-23 16:46:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:23,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:30,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:30,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:30,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:30,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:31,040 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-11-23 16:46:31,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 128 [2021-11-23 16:46:31,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:31,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 118 [2021-11-23 16:46:31,105 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 16:46:31,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 146 [2021-11-23 16:46:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:31,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:31,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407036623] [2021-11-23 16:46:31,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407036623] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:31,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [546678187] [2021-11-23 16:46:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:31,398 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:31,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:31,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:31,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 16:46:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:31,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 16:46:31,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:31,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:31,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:31,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 16:46:32,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:32,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:32,023 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 16:46:32,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2021-11-23 16:46:33,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:33,157 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-23 16:46:33,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 35 [2021-11-23 16:46:33,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:33,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:33,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 45 [2021-11-23 16:46:34,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:34,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 48 [2021-11-23 16:46:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:34,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:41,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:41,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:41,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:41,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:41,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:46:41,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 69 [2021-11-23 16:46:41,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:41,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2021-11-23 16:46:41,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-23 16:46:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:41,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [546678187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:41,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367675355] [2021-11-23 16:46:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:41,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:41,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:41,271 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:46:41,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 16:46:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:41,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 16:46:41,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:41,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:41,422 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-23 16:46:41,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 16:46:41,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:46:41,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 16:46:42,435 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 16:46:42,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 36 [2021-11-23 16:46:42,950 INFO L354 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2021-11-23 16:46:42,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 46 [2021-11-23 16:46:43,292 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 16:46:43,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 50 [2021-11-23 16:46:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:43,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:48,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:46:48,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 108 [2021-11-23 16:46:50,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:50,585 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-23 16:46:50,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 200 treesize of output 114 [2021-11-23 16:46:50,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:50,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 75 [2021-11-23 16:46:50,610 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 16:46:50,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 70 [2021-11-23 16:46:50,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2021-11-23 16:46:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:50,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367675355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:50,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:46:50,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12, 12, 13, 14] total 48 [2021-11-23 16:46:50,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810481046] [2021-11-23 16:46:50,690 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:46:50,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 16:46:50,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:50,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 16:46:50,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1837, Unknown=10, NotChecked=0, Total=2256 [2021-11-23 16:46:50,697 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 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 16:46:52,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:52,700 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-11-23 16:46:52,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 16:46:52,704 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 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 20 [2021-11-23 16:46:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:52,707 INFO L225 Difference]: With dead ends: 45 [2021-11-23 16:46:52,707 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 16:46:52,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=501, Invalid=2351, Unknown=10, NotChecked=0, Total=2862 [2021-11-23 16:46:52,710 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:52,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 89 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 97 Unchecked, 0.7s Time] [2021-11-23 16:46:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 16:46:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-11-23 16:46:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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 16:46:52,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-11-23 16:46:52,720 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 20 [2021-11-23 16:46:52,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:52,720 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-11-23 16:46:52,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 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 16:46:52,721 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-11-23 16:46:52,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 16:46:52,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:52,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:52,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:52,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:53,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-23 16:46:53,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:53,336 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:53,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2021-11-23 16:46:53,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:53,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237009466] [2021-11-23 16:46:53,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:53,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:53,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:53,350 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:53,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:46:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:53,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:46:53,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:53,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:46:53,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:46:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:53,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:53,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-23 16:46:53,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 16:46:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:53,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:53,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237009466] [2021-11-23 16:46:53,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237009466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:53,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1156749049] [2021-11-23 16:46:53,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:53,619 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:53,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:53,620 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:53,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 16:46:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:53,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:46:53,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:53,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:46:53,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:46:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:53,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:53,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-23 16:46:53,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 16:46:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:53,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1156749049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:53,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339314871] [2021-11-23 16:46:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:53,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:53,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:53,980 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:46:53,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 16:46:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:54,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:46:54,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:54,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 16:46:54,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:46:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:54,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:54,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-23 16:46:54,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 16:46:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:54,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339314871] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:54,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:46:54,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-11-23 16:46:54,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710391191] [2021-11-23 16:46:54,217 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:46:54,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 16:46:54,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:54,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 16:46:54,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:46:54,219 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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 16:46:54,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:54,428 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-11-23 16:46:54,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:46:54,430 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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 20 [2021-11-23 16:46:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:54,431 INFO L225 Difference]: With dead ends: 49 [2021-11-23 16:46:54,431 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 16:46:54,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-23 16:46:54,433 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:54,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 43 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:46:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 16:46:54,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-11-23 16:46:54,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 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 16:46:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-11-23 16:46:54,449 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 20 [2021-11-23 16:46:54,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:54,450 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-11-23 16:46:54,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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 16:46:54,450 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-11-23 16:46:54,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 16:46:54,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:54,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:54,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:54,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:54,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:55,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:55,056 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:55,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:55,057 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2021-11-23 16:46:55,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:55,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139191360] [2021-11-23 16:46:55,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:46:55,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:55,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:55,059 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:55,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:46:55,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:46:55,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:46:55,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:46:55,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:55,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:55,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:55,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139191360] [2021-11-23 16:46:55,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139191360] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:55,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2074564618] [2021-11-23 16:46:55,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:46:55,793 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:55,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:55,794 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:55,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 16:46:55,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:46:55,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:46:55,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:46:55,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:56,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:56,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2074564618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:56,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7652946] [2021-11-23 16:46:56,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:46:56,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:56,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:56,254 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:46:56,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 16:46:56,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:46:56,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:46:56,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:46:56,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:56,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:56,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7652946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:56,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:46:56,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 7, 8, 7] total 17 [2021-11-23 16:46:56,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098337642] [2021-11-23 16:46:56,603 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:46:56,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 16:46:56,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:56,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 16:46:56,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:46:56,605 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 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 16:46:57,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:57,476 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2021-11-23 16:46:57,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 16:46:57,479 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 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 22 [2021-11-23 16:46:57,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:57,480 INFO L225 Difference]: With dead ends: 66 [2021-11-23 16:46:57,480 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 16:46:57,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-11-23 16:46:57,482 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 143 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:57,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 21 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 16:46:57,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 16:46:57,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2021-11-23 16:46:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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 16:46:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-23 16:46:57,490 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-11-23 16:46:57,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:57,490 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-23 16:46:57,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 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 16:46:57,491 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-23 16:46:57,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 16:46:57,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:57,492 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:57,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:57,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:57,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:58,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:58,107 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:58,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:58,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2021-11-23 16:46:58,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:58,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991996754] [2021-11-23 16:46:58,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:46:58,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:58,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:58,109 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:58,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:46:58,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 16:46:58,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:46:58,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:46:58,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:58,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:59,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:59,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991996754] [2021-11-23 16:46:59,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991996754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:59,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1429111348] [2021-11-23 16:46:59,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:46:59,022 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:59,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:59,023 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:59,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 16:46:59,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 16:46:59,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:46:59,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:46:59,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:59,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:59,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1429111348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:59,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169074659] [2021-11-23 16:46:59,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:46:59,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:59,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:59,636 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:46:59,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 16:46:59,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 16:46:59,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:46:59,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:46:59,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:00,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:00,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169074659] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:00,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:47:00,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 7, 8, 7] total 27 [2021-11-23 16:47:00,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927889452] [2021-11-23 16:47:00,104 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:47:00,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 16:47:00,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:00,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 16:47:00,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-11-23 16:47:00,108 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 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 16:47:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:01,531 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-11-23 16:47:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 16:47:01,533 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 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) Word has length 22 [2021-11-23 16:47:01,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:01,534 INFO L225 Difference]: With dead ends: 72 [2021-11-23 16:47:01,534 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 16:47:01,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=410, Invalid=1072, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 16:47:01,536 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 172 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:01,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 27 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 16:47:01,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 16:47:01,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2021-11-23 16:47:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 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 16:47:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-11-23 16:47:01,559 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 22 [2021-11-23 16:47:01,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:01,560 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-11-23 16:47:01,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 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 16:47:01,561 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-11-23 16:47:01,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 16:47:01,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:01,563 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:01,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:01,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-23 16:47:01,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:02,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:02,184 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:02,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:02,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2021-11-23 16:47:02,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:02,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243332852] [2021-11-23 16:47:02,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:47:02,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:02,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:02,186 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:02,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:47:02,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:47:02,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:47:02,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 16:47:02,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:02,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:47:02,445 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-23 16:47:02,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 16:47:02,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:47:02,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 16:47:02,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 16:47:03,171 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 16:47:03,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 40 [2021-11-23 16:47:03,628 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-23 16:47:03,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 48 [2021-11-23 16:47:04,029 INFO L354 Elim1Store]: treesize reduction 73, result has 15.1 percent of original size [2021-11-23 16:47:04,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 69 [2021-11-23 16:47:04,432 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-23 16:47:04,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 115 treesize of output 71 [2021-11-23 16:47:04,785 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-11-23 16:47:04,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 131 treesize of output 79 [2021-11-23 16:47:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:04,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:04,535 INFO L354 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2021-11-23 16:48:04,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 5548 treesize of output 2414 [2021-11-23 16:48:09,704 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-23 16:48:10,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:48:10,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 606 treesize of output 562 [2021-11-23 16:48:23,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:48:23,977 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-23 16:48:23,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 1237 treesize of output 1 [2021-11-23 16:48:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:24,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243332852] [2021-11-23 16:48:24,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243332852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1724899416] [2021-11-23 16:48:24,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:48:24,004 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:48:24,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:48:24,009 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:48:24,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 16:48:24,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:48:24,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:24,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 16:48:24,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:25,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:48:25,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:48:25,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 16:48:27,481 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:48:27,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2021-11-23 16:48:27,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:48:27,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 16:48:31,002 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:48:31,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2021-11-23 16:48:31,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:48:31,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 16:48:40,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:48:40,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:48:40,366 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-23 16:48:40,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 39 [2021-11-23 16:48:45,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:48:45,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:48:45,601 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-23 16:48:45,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 47 [2021-11-23 16:48:49,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:48:49,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:48:49,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:48:50,458 INFO L354 Elim1Store]: treesize reduction 99, result has 22.0 percent of original size [2021-11-23 16:48:50,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 97 treesize of output 68 [2021-11-23 16:48:54,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:48:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:48:54,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 67 [2021-11-23 16:48:57,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:48:57,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 75 [2021-11-23 16:48:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:57,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:49,691 INFO L354 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2021-11-23 16:49:49,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 5548 treesize of output 2414 [2021-11-23 16:49:49,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:49:49,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 16:50:10,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:50:10,202 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-23 16:50:10,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 1059 treesize of output 1 [2021-11-23 16:50:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:10,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1724899416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:10,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613448935] [2021-11-23 16:50:10,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:50:10,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:10,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:10,227 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:10,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 16:50:10,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:50:10,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:50:10,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 16:50:10,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:10,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:50:10,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:50:10,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 16:50:10,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:50:13,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 16:50:15,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 16:50:24,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:50:24,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 41 [2021-11-23 16:50:30,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:50:30,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:50:30,594 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-23 16:50:30,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 54 treesize of output 47 [2021-11-23 16:50:34,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:50:34,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:50:34,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:50:35,436 INFO L354 Elim1Store]: treesize reduction 99, result has 22.0 percent of original size [2021-11-23 16:50:35,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 97 treesize of output 68 [2021-11-23 16:50:39,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:50:39,676 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-23 16:50:39,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 107 treesize of output 67 [2021-11-23 16:50:43,111 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 16:50:43,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 79 [2021-11-23 16:50:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:43,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:46,428 INFO L354 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2021-11-23 16:50:46,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 5548 treesize of output 2414 [2021-11-23 16:50:46,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:50:46,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 16:50:58,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:50:58,920 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-23 16:50:58,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 1059 treesize of output 1 [2021-11-23 16:50:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:50:58,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613448935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:58,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:50:58,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 19, 18, 20, 18] total 73 [2021-11-23 16:50:58,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156204185] [2021-11-23 16:50:58,964 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:50:58,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-23 16:50:58,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:58,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-23 16:50:58,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=823, Invalid=4392, Unknown=41, NotChecked=0, Total=5256 [2021-11-23 16:50:58,969 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 73 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 73 states have internal predecessors, (103), 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 16:51:11,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:11,230 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-23 16:51:11,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 16:51:11,231 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 73 states have internal predecessors, (103), 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 27 [2021-11-23 16:51:11,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:11,232 INFO L225 Difference]: With dead ends: 59 [2021-11-23 16:51:11,232 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 16:51:11,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2518 ImplicationChecksByTransitivity, 208.6s TimeCoverageRelationStatistics Valid=896, Invalid=5225, Unknown=41, NotChecked=0, Total=6162 [2021-11-23 16:51:11,237 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:11,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 93 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 112 Unchecked, 2.7s Time] [2021-11-23 16:51:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 16:51:11,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-23 16:51:11,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 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 16:51:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-11-23 16:51:11,248 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 27 [2021-11-23 16:51:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:11,248 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-11-23 16:51:11,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 73 states have internal predecessors, (103), 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 16:51:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-11-23 16:51:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 16:51:11,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:11,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:11,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:11,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:11,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:11,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:11,851 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:11,851 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 1 times [2021-11-23 16:51:11,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:11,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777617763] [2021-11-23 16:51:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:11,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:11,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:11,853 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:11,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 16:51:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:11,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:51:11,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:12,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 16:51:13,169 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-23 16:51:13,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 16:51:13,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-23 16:51:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:51:14,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:15,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 16:51:15,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-23 16:51:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:51:16,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:16,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777617763] [2021-11-23 16:51:16,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777617763] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:16,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [264648018] [2021-11-23 16:51:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:16,236 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:16,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:16,237 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:16,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 16:51:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:16,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:51:16,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:17,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 16:51:18,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:18,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 16:51:19,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:51:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:51:19,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:20,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 16:51:20,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-23 16:51:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:51:20,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [264648018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:20,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132781342] [2021-11-23 16:51:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:20,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:20,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:20,711 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:20,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 16:51:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:20,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:51:20,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:21,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 16:51:21,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:21,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 16:51:21,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 16:51:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:51:22,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:22,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 16:51:23,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-23 16:51:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:51:23,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132781342] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:23,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:23,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 17 [2021-11-23 16:51:23,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372657400] [2021-11-23 16:51:23,134 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:23,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 16:51:23,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:23,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 16:51:23,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:51:23,136 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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 16:51:26,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:26,410 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2021-11-23 16:51:26,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 16:51:26,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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 27 [2021-11-23 16:51:26,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:26,413 INFO L225 Difference]: With dead ends: 69 [2021-11-23 16:51:26,413 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 16:51:26,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-23 16:51:26,415 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:26,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 59 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 16:51:26,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 16:51:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-23 16:51:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 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 16:51:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-23 16:51:26,424 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 27 [2021-11-23 16:51:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:26,424 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-23 16:51:26,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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 16:51:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-23 16:51:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 16:51:26,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:26,426 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:26,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:26,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-23 16:51:26,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:27,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:27,032 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:27,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1292373713, now seen corresponding path program 5 times [2021-11-23 16:51:27,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:27,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765890903] [2021-11-23 16:51:27,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:51:27,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:27,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:27,034 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:27,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 16:51:27,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-23 16:51:27,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:27,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:51:27,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:51:32,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:51:38,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:38,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765890903] [2021-11-23 16:51:38,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765890903] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:38,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1993506511] [2021-11-23 16:51:38,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:51:38,988 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:38,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:38,988 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:38,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 16:51:39,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-23 16:51:39,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:39,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:51:39,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:51:43,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:51:45,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1993506511] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:45,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779311743] [2021-11-23 16:51:45,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:51:45,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:45,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:45,518 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:45,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 16:51:45,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-23 16:51:45,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:51:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:51:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:51:47,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:51:49,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779311743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:49,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:49,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 13, 12, 14, 12] total 31 [2021-11-23 16:51:49,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468222435] [2021-11-23 16:51:49,475 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:49,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 16:51:49,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:49,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 16:51:49,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-11-23 16:51:49,477 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 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 16:52:07,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:07,476 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-11-23 16:52:07,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 16:52:07,477 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 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 29 [2021-11-23 16:52:07,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:07,478 INFO L225 Difference]: With dead ends: 88 [2021-11-23 16:52:07,478 INFO L226 Difference]: Without dead ends: 69 [2021-11-23 16:52:07,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=496, Invalid=1666, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 16:52:07,480 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 270 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:07,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 27 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2021-11-23 16:52:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-23 16:52:07,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2021-11-23 16:52:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 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 16:52:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-11-23 16:52:07,495 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 29 [2021-11-23 16:52:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:07,496 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-11-23 16:52:07,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 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 16:52:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-11-23 16:52:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 16:52:07,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:07,498 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:07,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:07,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:07,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-23 16:52:08,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:08,100 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:52:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:08,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 6 times [2021-11-23 16:52:08,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:08,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647911196] [2021-11-23 16:52:08,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 16:52:08,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:08,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:08,103 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:08,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 16:52:08,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-23 16:52:08,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:52:08,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-23 16:52:08,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:09,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:52:09,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:52:09,589 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-23 16:52:09,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 16:52:10,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 16:52:11,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 16:52:12,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 16:52:15,019 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 16:52:15,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 40 [2021-11-23 16:52:17,987 INFO L354 Elim1Store]: treesize reduction 69, result has 14.8 percent of original size [2021-11-23 16:52:17,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 55 [2021-11-23 16:52:21,747 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-11-23 16:52:21,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 60 [2021-11-23 16:52:24,774 INFO L354 Elim1Store]: treesize reduction 109, result has 10.7 percent of original size [2021-11-23 16:52:24,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 107 treesize of output 81 [2021-11-23 16:52:28,591 INFO L354 Elim1Store]: treesize reduction 169, result has 7.1 percent of original size [2021-11-23 16:52:28,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 138 treesize of output 106 [2021-11-23 16:52:31,901 INFO L354 Elim1Store]: treesize reduction 69, result has 15.9 percent of original size [2021-11-23 16:52:31,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 109 [2021-11-23 16:52:34,469 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-23 16:52:34,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 134 [2021-11-23 16:52:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:52:35,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:28,203 INFO L354 Elim1Store]: treesize reduction 476, result has 26.2 percent of original size [2021-11-23 16:56:28,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 6 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 9 new quantified variables, introduced 39 case distinctions, treesize of input 341376 treesize of output 109030 [2021-11-23 16:56:36,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:36,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:36,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:36,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-11-23 16:56:36,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:36,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:36,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:36,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-11-23 16:56:36,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:36,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:36,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:36,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-11-23 16:56:37,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:37,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:37,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:37,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 3432 treesize of output 3216 [2021-11-23 16:56:37,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:37,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:37,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:56:37,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 3426 treesize of output 3216 [2021-11-23 16:57:15,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:15,905 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-23 16:57:15,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 7268 treesize of output 1 [2021-11-23 16:57:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:15,931 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:15,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647911196] [2021-11-23 16:57:15,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647911196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:15,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1454601930] [2021-11-23 16:57:15,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 16:57:15,933 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:15,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:57:15,934 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:57:15,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 16:57:16,155 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 16:57:16,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994469268] [2021-11-23 16:57:16,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 16:57:16,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:57:16,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:57:16,157 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:57:16,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 1 [2021-11-23 16:57:16,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa39f33b-dc34-44cd-a1de-033a112a7db4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 16:57:16,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-23 16:57:16,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:57:16,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-23 16:57:16,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:16,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:57:17,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:17,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:57:17,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 16:57:19,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 16:57:21,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 16:57:24,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 16:57:30,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:30,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 41 [2021-11-23 16:57:37,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:37,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:57:37,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:37,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:57:37,628 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-23 16:57:37,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 67 treesize of output 56 [2021-11-23 16:57:46,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:46,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:46,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:46,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:46,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:46,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:46,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:57:46,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:57:46,128 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 16:57:46,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 71 [2021-11-23 16:57:56,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:56,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:57:56,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:57:56,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:56,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:57:56,820 INFO L354 Elim1Store]: treesize reduction 99, result has 22.0 percent of original size [2021-11-23 16:57:56,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 108 treesize of output 82 [2021-11-23 16:58:01,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:58:01,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:58:01,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:58:01,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:58:01,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:58:01,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:58:01,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:58:02,120 INFO L354 Elim1Store]: treesize reduction 145, result has 18.1 percent of original size [2021-11-23 16:58:02,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 25 case distinctions, treesize of input 140 treesize of output 100 [2021-11-23 16:58:07,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:58:07,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:58:07,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:58:07,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:58:07,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:58:07,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:58:07,926 INFO L354 Elim1Store]: treesize reduction 108, result has 14.3 percent of original size [2021-11-23 16:58:07,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 24 case distinctions, treesize of input 182 treesize of output 121 [2021-11-23 16:58:19,086 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 16:58:19,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 234 treesize of output 146 [2021-11-23 16:58:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:58:19,268 INFO L328 TraceCheckSpWp]: Computing backward predicates...