./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s2lif.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_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/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_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s2lif.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/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_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/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 b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:21:11,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:21:11,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:21:11,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:21:11,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:21:11,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:21:11,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:21:11,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:21:11,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:21:11,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:21:11,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:21:11,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:21:11,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:21:11,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:21:11,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:21:11,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:21:11,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:21:11,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:21:11,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:21:11,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:21:11,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:21:11,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:21:11,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:21:11,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:21:11,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:21:11,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:21:11,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:21:11,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:21:11,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:21:11,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:21:11,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:21:11,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:21:11,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:21:11,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:21:11,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:21:11,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:21:11,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:21:11,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:21:11,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:21:11,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:21:11,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:21:11,833 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:21:11,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:21:11,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:21:11,890 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:21:11,890 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:21:11,892 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:21:11,892 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:21:11,893 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:21:11,893 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:21:11,893 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:21:11,894 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:21:11,895 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:21:11,896 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:21:11,896 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:21:11,897 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:21:11,897 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:21:11,897 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:21:11,898 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:21:11,898 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:21:11,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:21:11,900 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:21:11,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:21:11,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:21:11,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:21:11,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:21:11,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:21:11,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:21:11,904 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:21:11,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:21:11,905 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:21:11,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:21:11,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:21:11,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:21:11,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:21:11,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:21:11,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:21:11,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:21:11,908 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:21:11,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:21:11,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:21:11,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:21:11,910 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:21:11,910 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_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f [2021-11-23 17:21:12,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:21:12,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:21:12,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:21:12,356 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:21:12,357 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:21:12,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-fpi/s2lif.c [2021-11-23 17:21:12,449 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/data/f55314a44/473bd299324340f5a52b8bff9ad207d6/FLAG1e8f00e24 [2021-11-23 17:21:13,029 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:21:13,034 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/sv-benchmarks/c/array-fpi/s2lif.c [2021-11-23 17:21:13,052 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/data/f55314a44/473bd299324340f5a52b8bff9ad207d6/FLAG1e8f00e24 [2021-11-23 17:21:13,370 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/data/f55314a44/473bd299324340f5a52b8bff9ad207d6 [2021-11-23 17:21:13,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:21:13,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:21:13,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:21:13,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:21:13,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:21:13,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:21:13" (1/1) ... [2021-11-23 17:21:13,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@327e4808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:13, skipping insertion in model container [2021-11-23 17:21:13,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:21:13" (1/1) ... [2021-11-23 17:21:13,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:21:13,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:21:13,735 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_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/sv-benchmarks/c/array-fpi/s2lif.c[588,601] [2021-11-23 17:21:13,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:21:13,782 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:21:13,802 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_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/sv-benchmarks/c/array-fpi/s2lif.c[588,601] [2021-11-23 17:21:13,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:21:13,857 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:21:13,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:13 WrapperNode [2021-11-23 17:21:13,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:21:13,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:21:13,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:21:13,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:21:13,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:13" (1/1) ... [2021-11-23 17:21:13,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:13" (1/1) ... [2021-11-23 17:21:13,932 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2021-11-23 17:21:13,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:21:13,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:21:13,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:21:13,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:21:13,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:13" (1/1) ... [2021-11-23 17:21:13,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:13" (1/1) ... [2021-11-23 17:21:13,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:13" (1/1) ... [2021-11-23 17:21:13,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:13" (1/1) ... [2021-11-23 17:21:13,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:13" (1/1) ... [2021-11-23 17:21:13,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:13" (1/1) ... [2021-11-23 17:21:13,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:13" (1/1) ... [2021-11-23 17:21:13,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:21:14,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:21:14,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:21:14,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:21:14,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:13" (1/1) ... [2021-11-23 17:21:14,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:21:14,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:21:14,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:21:14,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:21:14,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:21:14,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:21:14,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:21:14,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:21:14,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:21:14,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:21:14,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:21:14,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:21:14,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:21:14,191 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:21:14,194 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:21:14,436 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:21:14,461 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:21:14,466 INFO L158 Benchmark]: Toolchain (without parser) took 1083.80ms. Allocated memory was 81.8MB in the beginning and 115.3MB in the end (delta: 33.6MB). Free memory was 44.7MB in the beginning and 75.8MB in the end (delta: -31.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:21:14,467 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 81.8MB. Free memory is still 60.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:21:14,469 INFO L158 Benchmark]: CACSL2BoogieTranslator took 471.30ms. Allocated memory was 81.8MB in the beginning and 115.3MB in the end (delta: 33.6MB). Free memory was 44.4MB in the beginning and 89.7MB in the end (delta: -45.3MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2021-11-23 17:21:14,470 INFO L158 Benchmark]: Boogie Procedure Inliner took 72.90ms. Allocated memory is still 115.3MB. Free memory was 89.7MB in the beginning and 88.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:21:14,471 INFO L158 Benchmark]: Boogie Preprocessor took 67.98ms. Allocated memory is still 115.3MB. Free memory was 88.0MB in the beginning and 86.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:21:14,472 INFO L158 Benchmark]: RCFGBuilder took 455.63ms. Allocated memory is still 115.3MB. Free memory was 86.8MB in the beginning and 75.8MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:21:14,478 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 81.8MB. Free memory is still 60.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 471.30ms. Allocated memory was 81.8MB in the beginning and 115.3MB in the end (delta: 33.6MB). Free memory was 44.4MB in the beginning and 89.7MB in the end (delta: -45.3MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 72.90ms. Allocated memory is still 115.3MB. Free memory was 89.7MB in the beginning and 88.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 67.98ms. Allocated memory is still 115.3MB. Free memory was 88.0MB in the beginning and 86.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 455.63ms. Allocated memory is still 115.3MB. Free memory was 86.8MB in the beginning and 75.8MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:21:14,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/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_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/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_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s2lif.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/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_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/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 b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:21:17,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:21:17,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:21:17,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:21:17,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:21:17,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:21:17,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:21:17,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:21:17,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:21:17,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:21:17,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:21:17,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:21:17,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:21:17,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:21:17,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:21:17,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:21:17,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:21:17,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:21:17,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:21:17,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:21:17,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:21:17,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:21:17,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:21:17,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:21:17,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:21:17,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:21:17,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:21:17,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:21:17,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:21:17,791 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:21:17,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:21:17,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:21:17,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:21:17,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:21:17,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:21:17,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:21:17,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:21:17,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:21:17,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:21:17,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:21:17,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:21:17,810 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:21:17,891 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:21:17,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:21:17,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:21:17,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:21:17,893 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:21:17,894 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:21:17,894 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:21:17,894 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:21:17,895 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:21:17,895 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:21:17,896 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:21:17,896 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:21:17,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:21:17,899 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:21:17,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:21:17,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:21:17,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:21:17,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:21:17,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:21:17,900 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:21:17,900 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:21:17,901 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:21:17,901 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:21:17,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:21:17,901 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:21:17,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:21:17,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:21:17,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:21:17,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:21:17,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:21:17,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:21:17,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:21:17,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:21:17,904 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:21:17,905 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:21:17,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:21:17,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:21:17,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:21:17,906 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_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b94168e93e7008f2fa8921a5a8a54bdf1fdce85df40220d4719fdc5076df164f [2021-11-23 17:21:18,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:21:18,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:21:18,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:21:18,413 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:21:18,414 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:21:18,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-fpi/s2lif.c [2021-11-23 17:21:18,511 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/data/e160cd6b6/54e56b3e9c104d2fa13546f8e93fcbdb/FLAGd06522409 [2021-11-23 17:21:19,269 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:21:19,269 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/sv-benchmarks/c/array-fpi/s2lif.c [2021-11-23 17:21:19,280 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/data/e160cd6b6/54e56b3e9c104d2fa13546f8e93fcbdb/FLAGd06522409 [2021-11-23 17:21:19,611 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/data/e160cd6b6/54e56b3e9c104d2fa13546f8e93fcbdb [2021-11-23 17:21:19,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:21:19,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:21:19,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:21:19,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:21:19,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:21:19,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:21:19" (1/1) ... [2021-11-23 17:21:19,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16a744fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:19, skipping insertion in model container [2021-11-23 17:21:19,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:21:19" (1/1) ... [2021-11-23 17:21:19,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:21:19,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:21:19,883 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_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/sv-benchmarks/c/array-fpi/s2lif.c[588,601] [2021-11-23 17:21:19,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:21:19,941 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:21:19,971 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_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/sv-benchmarks/c/array-fpi/s2lif.c[588,601] [2021-11-23 17:21:19,983 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:21:20,019 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:21:20,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:20 WrapperNode [2021-11-23 17:21:20,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:21:20,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:21:20,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:21:20,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:21:20,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:20" (1/1) ... [2021-11-23 17:21:20,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:20" (1/1) ... [2021-11-23 17:21:20,088 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2021-11-23 17:21:20,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:21:20,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:21:20,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:21:20,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:21:20,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:20" (1/1) ... [2021-11-23 17:21:20,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:20" (1/1) ... [2021-11-23 17:21:20,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:20" (1/1) ... [2021-11-23 17:21:20,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:20" (1/1) ... [2021-11-23 17:21:20,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:20" (1/1) ... [2021-11-23 17:21:20,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:20" (1/1) ... [2021-11-23 17:21:20,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:20" (1/1) ... [2021-11-23 17:21:20,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:21:20,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:21:20,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:21:20,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:21:20,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:20" (1/1) ... [2021-11-23 17:21:20,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:21:20,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:21:20,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:21:20,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:21:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:21:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:21:20,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:21:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-23 17:21:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:21:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 17:21:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:21:20,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:21:20,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-23 17:21:20,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:21:20,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 17:21:20,397 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:21:20,399 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:21:20,641 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:21:20,650 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:21:20,650 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 17:21:20,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:21:20 BoogieIcfgContainer [2021-11-23 17:21:20,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:21:20,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:21:20,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:21:20,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:21:20,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:21:19" (1/3) ... [2021-11-23 17:21:20,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5a15d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:21:20, skipping insertion in model container [2021-11-23 17:21:20,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:21:20" (2/3) ... [2021-11-23 17:21:20,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5a15d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:21:20, skipping insertion in model container [2021-11-23 17:21:20,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:21:20" (3/3) ... [2021-11-23 17:21:20,663 INFO L111 eAbstractionObserver]: Analyzing ICFG s2lif.c [2021-11-23 17:21:20,669 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:21:20,670 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:21:20,732 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:21:20,741 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:21:20,741 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:21:20,759 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 17:21:20,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 17:21:20,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:20,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:20,768 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:20,775 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2021-11-23 17:21:20,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:20,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479537974] [2021-11-23 17:21:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:20,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:20,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:20,796 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:20,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:21:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:21,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:21:21,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:21,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:21,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:21,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479537974] [2021-11-23 17:21:21,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479537974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:21,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:21,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:21:21,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358991066] [2021-11-23 17:21:21,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:21,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:21:21,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:21,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:21:21,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:21:21,167 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 17:21:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:21,191 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-11-23 17:21:21,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:21:21,194 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 17:21:21,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:21,206 INFO L225 Difference]: With dead ends: 40 [2021-11-23 17:21:21,206 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 17:21:21,212 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 17:21:21,220 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 17:21:21,223 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 17:21:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 17:21:21,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-23 17:21:21,266 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 17:21:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-23 17:21:21,270 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2021-11-23 17:21:21,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:21,271 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-23 17:21:21,272 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 17:21:21,272 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-23 17:21:21,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 17:21:21,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:21,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:21,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:21,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:21,503 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:21,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:21,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2021-11-23 17:21:21,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:21,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014811319] [2021-11-23 17:21:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:21,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:21,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:21,516 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:21,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:21:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:21,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:21:21,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:21,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:21,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:21,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014811319] [2021-11-23 17:21:21,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014811319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:21,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:21:21,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:21:21,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759019018] [2021-11-23 17:21:21,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:21,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:21:21,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:21,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:21:21,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:21:21,866 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 17:21:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:22,115 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-11-23 17:21:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:21:22,116 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 17:21:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:22,117 INFO L225 Difference]: With dead ends: 36 [2021-11-23 17:21:22,118 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 17:21:22,118 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 17:21:22,120 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 17:21:22,121 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 17:21:22,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 17:21:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-11-23 17:21:22,128 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 17:21:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-23 17:21:22,132 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-11-23 17:21:22,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:22,132 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-23 17:21:22,133 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 17:21:22,133 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-23 17:21:22,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 17:21:22,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:22,134 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 17:21:22,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:22,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:22,356 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:22,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2021-11-23 17:21:22,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:22,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636303869] [2021-11-23 17:21:22,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:22,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:22,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:22,359 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:22,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:21:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:22,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 17:21:22,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:22,665 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 17:21:22,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:22,716 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-23 17:21:22,717 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 17:21:22,844 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 17:21:22,845 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 17:21:23,385 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 17:21:23,386 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 17:21:23,757 INFO L354 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2021-11-23 17:21:23,758 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 17:21:24,139 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 17:21:24,140 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 17:21:24,200 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 17:21:24,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:31,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:31,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:31,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:31,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:31,931 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-11-23 17:21:31,932 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 17:21:31,955 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 17:21:31,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:31,970 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 17:21:31,992 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 17:21:31,992 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 17:21:32,478 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 17:21:32,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:32,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636303869] [2021-11-23 17:21:32,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636303869] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:32,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [855402761] [2021-11-23 17:21:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:32,480 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:21:32,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:21:32,499 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:21:32,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:21:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:32,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 17:21:32,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:32,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:32,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:32,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 17:21:33,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:33,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:33,383 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 17:21:33,383 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 17:21:34,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:34,745 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-23 17:21:34,746 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 17:21:35,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:35,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:35,383 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 17:21:35,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:35,916 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 84 treesize of output 48 [2021-11-23 17:21:35,936 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 17:21:35,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:36,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:36,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:36,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:36,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:36,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:21:36,982 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 17:21:36,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:36,998 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 17:21:37,008 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 17:21:37,172 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 17:21:37,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [855402761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:37,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749649331] [2021-11-23 17:21:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:37,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:21:37,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:21:37,179 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:21:37,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 17:21:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:37,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 17:21:37,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:37,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:37,379 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-23 17:21:37,380 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 17:21:37,400 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 17:21:37,648 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 17:21:38,538 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 17:21:38,539 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 17:21:38,977 INFO L354 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2021-11-23 17:21:38,978 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 17:21:39,368 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 17:21:39,369 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 17:21:39,394 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 17:21:39,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:46,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:21:46,489 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 17:21:49,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:21:49,245 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-23 17:21:49,245 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 194 treesize of output 108 [2021-11-23 17:21:49,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:21:49,255 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 87 treesize of output 69 [2021-11-23 17:21:49,271 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 17:21:49,271 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 92 treesize of output 62 [2021-11-23 17:21:49,326 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 17:21:49,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749649331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:49,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:21:49,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12, 12, 13, 14] total 47 [2021-11-23 17:21:49,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093736723] [2021-11-23 17:21:49,327 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:21:49,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 17:21:49,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:49,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 17:21:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1773, Unknown=9, NotChecked=0, Total=2162 [2021-11-23 17:21:49,335 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:51,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:51,896 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-11-23 17:21:51,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 17:21:51,905 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 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 17:21:51,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:51,908 INFO L225 Difference]: With dead ends: 45 [2021-11-23 17:21:51,908 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 17:21:51,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=467, Invalid=2280, Unknown=9, NotChecked=0, Total=2756 [2021-11-23 17:21:51,911 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:51,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 92 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 69 Unchecked, 0.8s Time] [2021-11-23 17:21:51,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 17:21:51,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-11-23 17:21:51,921 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 17:21:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-11-23 17:21:51,923 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 20 [2021-11-23 17:21:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:51,923 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-11-23 17:21:51,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-11-23 17:21:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 17:21:51,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:51,925 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 17:21:51,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:52,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:52,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:52,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:21:52,530 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:52,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:52,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2021-11-23 17:21:52,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:52,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065518549] [2021-11-23 17:21:52,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:52,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:52,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:52,533 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:52,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:21:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:52,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:21:52,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:52,655 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 17:21:52,724 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 17:21:52,758 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 17:21:52,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:52,841 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 17:21:52,845 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 17:21:52,872 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 17:21:52,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:52,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065518549] [2021-11-23 17:21:52,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065518549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:52,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1548393784] [2021-11-23 17:21:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:52,874 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:21:52,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:21:52,877 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:21:52,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:21:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:52,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:21:52,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:53,024 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 17:21:53,100 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 17:21:53,129 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 17:21:53,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:53,178 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 17:21:53,181 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 17:21:53,194 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 17:21:53,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1548393784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:53,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923904919] [2021-11-23 17:21:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:53,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:21:53,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:21:53,196 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:21:53,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 17:21:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:53,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:21:53,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:53,292 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 17:21:53,345 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 17:21:53,369 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 17:21:53,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:53,427 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 17:21:53,431 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 17:21:53,446 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 17:21:53,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923904919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:53,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:21:53,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-11-23 17:21:53,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763616246] [2021-11-23 17:21:53,447 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:21:53,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 17:21:53,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:53,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 17:21:53,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:21:53,449 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 17:21:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:53,777 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-11-23 17:21:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:21:53,778 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 17:21:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:53,779 INFO L225 Difference]: With dead ends: 49 [2021-11-23 17:21:53,779 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 17:21:53,780 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 17:21:53,781 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:53,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 57 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:21:53,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 17:21:53,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-11-23 17:21:53,790 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 17:21:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-11-23 17:21:53,791 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 20 [2021-11-23 17:21:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:53,792 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-11-23 17:21:53,792 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 17:21:53,792 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-11-23 17:21:53,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 17:21:53,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:53,794 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 17:21:53,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:54,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-23 17:21:54,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:54,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:54,409 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:54,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:54,409 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2021-11-23 17:21:54,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:54,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987759421] [2021-11-23 17:21:54,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:21:54,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:54,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:54,413 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:54,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:21:54,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:21:54,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:21:54,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:21:54,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:54,837 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 17:21:54,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:55,042 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 17:21:55,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:55,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987759421] [2021-11-23 17:21:55,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987759421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:55,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1645973894] [2021-11-23 17:21:55,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:21:55,043 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:21:55,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:21:55,044 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:21:55,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 17:21:55,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:21:55,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:21:55,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:21:55,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:55,367 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 17:21:55,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:55,483 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 17:21:55,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1645973894] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:55,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920196014] [2021-11-23 17:21:55,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:21:55,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:21:55,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:21:55,489 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:21:55,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 17:21:55,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:21:55,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:21:55,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:21:55,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:55,784 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 17:21:55,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:55,874 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 17:21:55,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920196014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:55,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:21:55,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 7, 8, 7] total 17 [2021-11-23 17:21:55,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437254932] [2021-11-23 17:21:55,875 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:21:55,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 17:21:55,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:55,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 17:21:55,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:21:55,877 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 17:21:56,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:56,675 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2021-11-23 17:21:56,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:21:56,676 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 17:21:56,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:56,677 INFO L225 Difference]: With dead ends: 66 [2021-11-23 17:21:56,677 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 17:21:56,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:21:56,679 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 90 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:56,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:21:56,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 17:21:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2021-11-23 17:21:56,686 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 17:21:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-23 17:21:56,688 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-11-23 17:21:56,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:56,688 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-23 17:21:56,688 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 17:21:56,689 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-23 17:21:56,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 17:21:56,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:56,690 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 17:21:56,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:56,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:57,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:57,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:57,306 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:57,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:57,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2021-11-23 17:21:57,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:57,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150470074] [2021-11-23 17:21:57,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:21:57,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:57,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:57,308 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:57,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:21:57,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:21:57,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:21:57,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:21:57,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:57,769 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 17:21:57,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:58,203 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 17:21:58,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:58,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150470074] [2021-11-23 17:21:58,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150470074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:58,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1574542399] [2021-11-23 17:21:58,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:21:58,204 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:21:58,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:21:58,209 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:21:58,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:21:58,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:21:58,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:21:58,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:21:58,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:58,619 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 17:21:58,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:58,816 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 17:21:58,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1574542399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:58,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998119137] [2021-11-23 17:21:58,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:21:58,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:21:58,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:21:58,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:21:58,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 17:21:58,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 17:21:58,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:21:58,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:21:58,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:59,095 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 17:21:59,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:59,170 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 17:21:59,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998119137] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:59,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:21:59,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 7, 8, 7] total 27 [2021-11-23 17:21:59,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981479182] [2021-11-23 17:21:59,171 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:21:59,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 17:21:59,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:59,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 17:21:59,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-11-23 17:21:59,175 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 17:22:00,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:00,115 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-11-23 17:22:00,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 17:22:00,116 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 17:22:00,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:00,117 INFO L225 Difference]: With dead ends: 72 [2021-11-23 17:22:00,117 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 17:22:00,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=410, Invalid=1072, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 17:22:00,120 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 218 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:00,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 25 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 17:22:00,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 17:22:00,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2021-11-23 17:22:00,131 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 17:22:00,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-11-23 17:22:00,132 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 22 [2021-11-23 17:22:00,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:00,133 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-11-23 17:22:00,133 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 17:22:00,134 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-11-23 17:22:00,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 17:22:00,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:00,135 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 17:22:00,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:00,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:00,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-23 17:22:00,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:22:00,750 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:00,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:00,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2021-11-23 17:22:00,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:00,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218122981] [2021-11-23 17:22:00,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:22:00,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:00,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:00,752 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:00,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:22:00,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:22:00,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:22:00,903 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 17:22:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:01,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:22:01,028 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-23 17:22:01,029 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 17:22:01,052 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 17:22:01,161 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 17:22:01,290 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 17:22:01,710 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 17:22:01,710 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 17:22:02,084 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-23 17:22:02,084 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 17:22:02,445 INFO L354 Elim1Store]: treesize reduction 73, result has 15.1 percent of original size [2021-11-23 17:22:02,445 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 17:22:02,926 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-23 17:22:02,927 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 17:22:03,286 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-11-23 17:22:03,287 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 119 treesize of output 79 [2021-11-23 17:22:03,368 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 17:22:03,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:06,449 INFO L354 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2021-11-23 17:23:06,450 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 17:23:06,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:23:06,651 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 21 treesize of output 15 [2021-11-23 17:23:18,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:23:18,437 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-23 17:23:18,437 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 17:23:18,462 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 17:23:18,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:18,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218122981] [2021-11-23 17:23:18,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218122981] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:18,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [368058303] [2021-11-23 17:23:18,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:23:18,463 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:23:18,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:23:18,471 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:23:18,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:23:18,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:23:18,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:23:18,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 17:23:18,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:20,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:23:20,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:23:20,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 17:23:21,666 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:23:21,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 17:23:21,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:23:21,797 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 17:23:24,873 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 17:23:24,874 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 17:23:25,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:23:25,007 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 17:23:32,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:23:32,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:23:33,094 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-23 17:23:33,094 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 17:23:37,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:23:37,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:23:37,698 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-23 17:23:37,699 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 17:23:41,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:23:41,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:23:41,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:23:41,923 INFO L354 Elim1Store]: treesize reduction 99, result has 22.0 percent of original size [2021-11-23 17:23:41,924 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 17:23:45,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:23:45,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:23:45,296 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 17:23:48,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:23:48,480 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 123 treesize of output 75 [2021-11-23 17:23:48,631 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 17:23:48,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:35,623 INFO L354 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2021-11-23 17:24:35,623 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 17:24:35,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:24:35,712 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 17:24:53,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:24:53,183 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-23 17:24:53,184 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 17:24:53,204 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 17:24:53,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [368058303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:53,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239491265] [2021-11-23 17:24:53,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:24:53,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:24:53,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:24:53,209 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:24:53,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 17:24:53,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:24:53,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:24:53,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:24:53,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:53,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:24:53,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:24:53,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 17:24:53,694 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 17:24:55,576 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 17:24:57,675 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 17:25:05,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:25:05,422 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 17:25:10,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:25:10,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:25:10,326 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-23 17:25:10,327 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 17:25:13,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:25:13,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:25:13,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:25:14,299 INFO L354 Elim1Store]: treesize reduction 99, result has 22.0 percent of original size [2021-11-23 17:25:14,300 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 17:25:17,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:25:18,196 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-23 17:25:18,197 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 17:25:20,937 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:25:20,938 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 107 treesize of output 79 [2021-11-23 17:25:21,091 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 17:25:21,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:24,007 INFO L354 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2021-11-23 17:25:24,008 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 17:25:24,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:25:24,111 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 17:25:51,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:25:51,554 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-23 17:25:51,555 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 17:25:51,578 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 17:25:51,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239491265] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:51,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:51,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 19, 18, 20, 18] total 75 [2021-11-23 17:25:51,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361581358] [2021-11-23 17:25:51,578 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:51,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-23 17:25:51,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:51,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-23 17:25:51,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=900, Invalid=4600, Unknown=50, NotChecked=0, Total=5550 [2021-11-23 17:25:51,583 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 75 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 75 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:02,694 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-23 17:26:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 17:26:02,695 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 75 states have internal predecessors, (107), 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 17:26:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:02,696 INFO L225 Difference]: With dead ends: 59 [2021-11-23 17:26:02,696 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 17:26:02,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2656 ImplicationChecksByTransitivity, 209.8s TimeCoverageRelationStatistics Valid=977, Invalid=5453, Unknown=50, NotChecked=0, Total=6480 [2021-11-23 17:26:02,700 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:02,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 77 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 67 Unchecked, 2.4s Time] [2021-11-23 17:26:02,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 17:26:02,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-23 17:26:02,709 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 17:26:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-11-23 17:26:02,711 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 27 [2021-11-23 17:26:02,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:02,711 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-11-23 17:26:02,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 75 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:02,712 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-11-23 17:26:02,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 17:26:02,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:02,713 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 17:26:02,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:02,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:03,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:03,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:03,314 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:03,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:03,314 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 1 times [2021-11-23 17:26:03,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:03,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007389446] [2021-11-23 17:26:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:03,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:03,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:03,317 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:03,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:26:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:03,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:26:03,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:03,696 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 17:26:04,459 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-23 17:26:04,459 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 17:26:04,847 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 17:26:05,238 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 17:26:05,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:06,584 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 17:26:06,615 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 17:26:07,199 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 17:26:07,199 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:07,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007389446] [2021-11-23 17:26:07,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007389446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:07,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1049667388] [2021-11-23 17:26:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:07,200 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:07,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:07,201 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:07,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 17:26:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:07,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:26:07,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:08,262 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 17:26:09,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:26:09,485 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 17:26:10,254 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 17:26:10,518 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 17:26:10,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:11,438 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 17:26:11,482 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 17:26:11,617 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 17:26:11,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1049667388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:11,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042606835] [2021-11-23 17:26:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:11,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:11,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:26:11,622 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:26:11,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 17:26:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:11,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:26:11,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:12,052 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 17:26:12,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:26:12,641 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 17:26:12,838 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 17:26:13,046 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 17:26:13,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:13,954 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 17:26:13,985 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 17:26:14,087 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 17:26:14,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042606835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:14,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:26:14,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 17 [2021-11-23 17:26:14,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736653548] [2021-11-23 17:26:14,089 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:26:14,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 17:26:14,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:14,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 17:26:14,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:26:14,091 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 17:26:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:17,372 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2021-11-23 17:26:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:26:17,373 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 17:26:17,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:17,374 INFO L225 Difference]: With dead ends: 69 [2021-11-23 17:26:17,374 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 17:26:17,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:26:17,376 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:17,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 64 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 17:26:17,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 17:26:17,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-23 17:26:17,384 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 17:26:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-23 17:26:17,385 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 27 [2021-11-23 17:26:17,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:17,386 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-23 17:26:17,386 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 17:26:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-23 17:26:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 17:26:17,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:17,388 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 17:26:17,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:17,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-23 17:26:17,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:17,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:17,990 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:17,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:17,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1292373713, now seen corresponding path program 5 times [2021-11-23 17:26:17,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:17,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476246741] [2021-11-23 17:26:17,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:26:17,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:17,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:17,992 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:17,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:26:18,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-23 17:26:18,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:26:18,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:26:18,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:23,461 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 17:26:23,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:28,920 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 17:26:28,920 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:28,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476246741] [2021-11-23 17:26:28,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476246741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:28,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1696474669] [2021-11-23 17:26:28,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:26:28,921 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:28,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:28,934 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:28,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 17:26:29,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-23 17:26:29,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:26:29,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:26:29,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:33,502 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 17:26:33,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:35,001 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 17:26:35,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1696474669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:35,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089563331] [2021-11-23 17:26:35,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:26:35,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:35,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:26:35,003 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:26:35,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 17:26:35,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-23 17:26:35,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:26:35,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:26:35,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:37,188 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 17:26:37,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:38,626 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 17:26:38,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089563331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:38,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:26:38,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 13, 12, 14, 12] total 31 [2021-11-23 17:26:38,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284734636] [2021-11-23 17:26:38,628 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:26:38,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 17:26:38,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:38,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 17:26:38,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-11-23 17:26:38,629 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 17:26:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:56,930 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-11-23 17:26:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 17:26:56,931 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 17:26:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:56,932 INFO L225 Difference]: With dead ends: 88 [2021-11-23 17:26:56,932 INFO L226 Difference]: Without dead ends: 69 [2021-11-23 17:26:56,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=496, Invalid=1666, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 17:26:56,935 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 287 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:56,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 37 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2021-11-23 17:26:56,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-23 17:26:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2021-11-23 17:26:56,946 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 17:26:56,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-11-23 17:26:56,947 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 29 [2021-11-23 17:26:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:56,948 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-11-23 17:26:56,948 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 17:26:56,948 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-11-23 17:26:56,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 17:26:56,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:56,950 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 17:26:56,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-23 17:26:57,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:57,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:57,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:57,554 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:57,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:57,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 6 times [2021-11-23 17:26:57,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:57,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863351849] [2021-11-23 17:26:57,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:26:57,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:57,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:57,556 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:57,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:26:57,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-23 17:26:57,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:26:57,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-23 17:26:57,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:58,563 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 17:26:58,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:26:58,912 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-23 17:26:58,913 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 17:26:59,458 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 17:27:00,333 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 17:27:01,188 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 24 treesize of output 24 [2021-11-23 17:27:04,310 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 17:27:04,310 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 17:27:06,997 INFO L354 Elim1Store]: treesize reduction 69, result has 14.8 percent of original size [2021-11-23 17:27:06,997 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 17:27:10,608 INFO L354 Elim1Store]: treesize reduction 92, result has 15.6 percent of original size [2021-11-23 17:27:10,609 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 17:27:13,732 INFO L354 Elim1Store]: treesize reduction 109, result has 10.7 percent of original size [2021-11-23 17:27:13,733 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 17:27:16,530 INFO L354 Elim1Store]: treesize reduction 169, result has 7.1 percent of original size [2021-11-23 17:27:16,530 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 17:27:19,820 INFO L354 Elim1Store]: treesize reduction 69, result has 15.9 percent of original size [2021-11-23 17:27:19,821 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 17:27:22,128 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-23 17:27:22,129 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 192 treesize of output 134 [2021-11-23 17:27:22,992 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 17:27:22,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:00,644 INFO L354 Elim1Store]: treesize reduction 476, result has 26.2 percent of original size [2021-11-23 17:31:00,646 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 464720 treesize of output 149824 [2021-11-23 17:31:01,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:01,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:01,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:01,279 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 17:31:01,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:01,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:01,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:01,520 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 57834 treesize of output 55810 [2021-11-23 17:31:01,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:01,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:01,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:01,615 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 59412 treesize of output 56982 [2021-11-23 17:31:05,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:05,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:05,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:05,030 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 3434 treesize of output 3220 [2021-11-23 17:31:05,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:05,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:05,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:05,561 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 3438 treesize of output 3220 [2021-11-23 17:31:47,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:47,190 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-23 17:31:47,190 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 17:31:47,212 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 17:31:47,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:47,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863351849] [2021-11-23 17:31:47,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863351849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:47,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1647868234] [2021-11-23 17:31:47,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:31:47,213 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:47,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:31:47,214 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:31:47,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 17:31:47,427 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 17:31:47,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82958585] [2021-11-23 17:31:47,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:31:47,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:47,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:47,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 1 [2021-11-23 17:31:47,428 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:31:47,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_412175d3-ac43-4a87-a9cf-a9f2f54a70c8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 17:31:47,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-23 17:31:47,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:47,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-23 17:31:47,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:48,166 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 17:31:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:48,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:31:48,370 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 17:31:50,453 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 17:31:51,009 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 17:31:51,767 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 17:31:56,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:31:56,644 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 17:32:03,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:03,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:32:03,947 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-23 17:32:03,947 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 62 treesize of output 51 [2021-11-23 17:32:12,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:12,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:12,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:12,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:12,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:12,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:32:12,352 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 17:32:12,353 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 74 treesize of output 66 [2021-11-23 17:32:23,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:23,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:32:23,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:32:23,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:23,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:24,049 INFO L354 Elim1Store]: treesize reduction 99, result has 22.0 percent of original size [2021-11-23 17:32:24,050 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 17:32:29,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:29,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:32:29,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:29,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:32:29,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:29,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:29,816 INFO L354 Elim1Store]: treesize reduction 107, result has 15.7 percent of original size [2021-11-23 17:32:29,816 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 130 treesize of output 88 [2021-11-23 17:32:34,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:32:34,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:34,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:34,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:32:34,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:32:35,379 INFO L354 Elim1Store]: treesize reduction 63, result has 19.2 percent of original size [2021-11-23 17:32:35,379 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 17 case distinctions, treesize of input 142 treesize of output 118 [2021-11-23 17:32:45,852 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 17:32:45,853 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 170 treesize of output 130 [2021-11-23 17:32:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:32:46,020 INFO L328 TraceCheckSpWp]: Computing backward predicates...