./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P --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 8f54012f988f8b18e3a56958a20c5d2f68df7899121416cbc3449d3f0665a6c5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:15:10,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:15:10,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:15:10,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:15:10,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:15:10,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:15:10,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:15:10,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:15:10,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:15:10,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:15:10,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:15:10,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:15:10,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:15:10,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:15:10,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:15:10,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:15:10,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:15:10,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:15:10,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:15:10,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:15:10,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:15:10,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:15:10,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:15:10,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:15:10,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:15:10,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:15:10,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:15:10,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:15:10,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:15:10,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:15:10,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:15:10,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:15:10,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:15:10,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:15:10,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:15:10,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:15:10,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:15:10,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:15:10,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:15:10,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:15:10,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:15:10,845 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:15:10,870 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:15:10,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:15:10,871 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:15:10,872 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:15:10,872 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:15:10,873 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:15:10,873 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:15:10,874 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:15:10,874 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:15:10,874 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:15:10,875 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:15:10,875 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:15:10,875 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:15:10,876 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:15:10,876 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:15:10,877 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:15:10,877 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:15:10,877 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:15:10,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:15:10,879 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:15:10,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:15:10,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:15:10,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:15:10,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:15:10,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:15:10,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:15:10,881 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:15:10,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:15:10,882 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:15:10,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:15:10,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:15:10,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:15:10,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:15:10,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:15:10,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:15:10,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:15:10,884 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:15:10,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:15:10,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:15:10,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:15:10,885 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:15:10,886 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_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f54012f988f8b18e3a56958a20c5d2f68df7899121416cbc3449d3f0665a6c5 [2021-11-20 23:15:11,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:15:11,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:15:11,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:15:11,203 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:15:11,203 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:15:11,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c [2021-11-20 23:15:11,295 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/data/1c5a625c5/ff201ae44b184db6a8eb4badab17cb3f/FLAG731679ea1 [2021-11-20 23:15:11,709 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:15:11,709 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c [2021-11-20 23:15:11,723 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/data/1c5a625c5/ff201ae44b184db6a8eb4badab17cb3f/FLAG731679ea1 [2021-11-20 23:15:12,098 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/data/1c5a625c5/ff201ae44b184db6a8eb4badab17cb3f [2021-11-20 23:15:12,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:15:12,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:15:12,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:15:12,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:15:12,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:15:12,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:15:12" (1/1) ... [2021-11-20 23:15:12,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d24d607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:12, skipping insertion in model container [2021-11-20 23:15:12,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:15:12" (1/1) ... [2021-11-20 23:15:12,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:15:12,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:15:12,264 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_4198f25f-29ea-4ef3-a3dd-c644a12e8076/sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c[331,344] [2021-11-20 23:15:12,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:15:12,304 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:15:12,314 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c[331,344] [2021-11-20 23:15:12,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:15:12,333 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:15:12,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:12 WrapperNode [2021-11-20 23:15:12,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:15:12,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:15:12,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:15:12,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:15:12,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:12" (1/1) ... [2021-11-20 23:15:12,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:12" (1/1) ... [2021-11-20 23:15:12,387 INFO L137 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2021-11-20 23:15:12,388 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:15:12,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:15:12,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:15:12,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:15:12,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:12" (1/1) ... [2021-11-20 23:15:12,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:12" (1/1) ... [2021-11-20 23:15:12,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:12" (1/1) ... [2021-11-20 23:15:12,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:12" (1/1) ... [2021-11-20 23:15:12,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:12" (1/1) ... [2021-11-20 23:15:12,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:12" (1/1) ... [2021-11-20 23:15:12,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:12" (1/1) ... [2021-11-20 23:15:12,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:15:12,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:15:12,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:15:12,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:15:12,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:12" (1/1) ... [2021-11-20 23:15:12,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:15:12,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:12,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:15:12,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:15:12,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:15:12,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:15:12,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:15:12,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:15:12,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:15:12,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:15:12,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:15:12,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:15:12,564 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:15:12,565 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:15:12,680 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:15:12,737 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:15:12,738 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 23:15:12,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:15:12 BoogieIcfgContainer [2021-11-20 23:15:12,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:15:12,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:15:12,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:15:12,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:15:12,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:15:12" (1/3) ... [2021-11-20 23:15:12,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e42c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:15:12, skipping insertion in model container [2021-11-20 23:15:12,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:15:12" (2/3) ... [2021-11-20 23:15:12,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e42c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:15:12, skipping insertion in model container [2021-11-20 23:15:12,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:15:12" (3/3) ... [2021-11-20 23:15:12,748 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_1.c [2021-11-20 23:15:12,753 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:15:12,753 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:15:12,820 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:15:12,827 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 [2021-11-20 23:15:12,828 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:15:12,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 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) [2021-11-20 23:15:12,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 23:15:12,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:12,862 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 23:15:12,862 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:12,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:12,869 INFO L85 PathProgramCache]: Analyzing trace with hash 113225757, now seen corresponding path program 1 times [2021-11-20 23:15:12,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:12,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440179918] [2021-11-20 23:15:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:12,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:12,954 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:15:12,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085718322] [2021-11-20 23:15:12,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:12,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:12,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:12,976 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:15:12,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:15:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:13,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:15:13,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:13,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:15:13,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:13,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440179918] [2021-11-20 23:15:13,116 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:15:13,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085718322] [2021-11-20 23:15:13,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085718322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:13,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:13,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:15:13,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044399052] [2021-11-20 23:15:13,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:13,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:15:13,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:13,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:15:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:15:13,152 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-20 23:15:13,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:13,187 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-11-20 23:15:13,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:15:13,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-11-20 23:15:13,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:13,196 INFO L225 Difference]: With dead ends: 15 [2021-11-20 23:15:13,197 INFO L226 Difference]: Without dead ends: 8 [2021-11-20 23:15:13,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:15:13,203 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:13,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:15:13,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-20 23:15:13,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-20 23:15:13,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:13,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-20 23:15:13,234 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-11-20 23:15:13,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:13,235 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-20 23:15:13,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-20 23:15:13,235 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-20 23:15:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:15:13,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:13,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:15:13,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:13,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-20 23:15:13,461 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:13,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:13,462 INFO L85 PathProgramCache]: Analyzing trace with hash -777643133, now seen corresponding path program 1 times [2021-11-20 23:15:13,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:13,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788894420] [2021-11-20 23:15:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:13,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:13,471 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:15:13,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149550687] [2021-11-20 23:15:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:13,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:13,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:13,473 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:15:13,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:15:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:13,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:15:13,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:13,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:15:13,648 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788894420] [2021-11-20 23:15:13,649 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:15:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149550687] [2021-11-20 23:15:13,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149550687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:15:13,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1909830108] [2021-11-20 23:15:13,670 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-20 23:15:13,671 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:15:13,675 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:15:13,680 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:15:13,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:15:13,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,821 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-20 23:15:13,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-20 23:15:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:13,927 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:15:13,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:15:14,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:14,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:14,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 90 [2021-11-20 23:15:14,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:14,217 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 34 treesize of output 22 [2021-11-20 23:15:14,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:14,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:14,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:14,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:14,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:14,882 INFO L354 Elim1Store]: treesize reduction 214, result has 22.2 percent of original size [2021-11-20 23:15:14,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 401 treesize of output 459 [2021-11-20 23:15:17,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,201 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 35 treesize of output 18 [2021-11-20 23:15:17,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:17,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 70 treesize of output 41 [2021-11-20 23:15:19,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:19,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:19,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 74 treesize of output 45 [2021-11-20 23:15:24,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:24,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:24,266 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-20 23:15:24,267 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 5 case distinctions, treesize of input 425 treesize of output 378 [2021-11-20 23:15:28,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:28,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:28,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:28,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 148 [2021-11-20 23:15:28,718 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 12 treesize of output 3 [2021-11-20 23:15:28,769 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 24 treesize of output 15 [2021-11-20 23:15:28,858 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 22 treesize of output 13 [2021-11-20 23:15:29,902 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:15:30,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1909830108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:30,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:15:30,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2021-11-20 23:15:30,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520436467] [2021-11-20 23:15:30,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:30,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:15:30,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:30,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:15:30,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:15:30,313 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-20 23:15:30,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:30,381 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-11-20 23:15:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:15:30,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-11-20 23:15:30,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:30,382 INFO L225 Difference]: With dead ends: 13 [2021-11-20 23:15:30,382 INFO L226 Difference]: Without dead ends: 11 [2021-11-20 23:15:30,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:15:30,384 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:30,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:15:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-20 23:15:30,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-11-20 23:15:30,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2021-11-20 23:15:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-20 23:15:30,390 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-11-20 23:15:30,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:30,391 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-20 23:15:30,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-20 23:15:30,391 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-20 23:15:30,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 23:15:30,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:30,392 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:30,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:30,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:30,593 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:30,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:30,594 INFO L85 PathProgramCache]: Analyzing trace with hash 292223012, now seen corresponding path program 1 times [2021-11-20 23:15:30,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:30,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89240939] [2021-11-20 23:15:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:30,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:30,599 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:15:30,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146941017] [2021-11-20 23:15:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:30,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:30,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:30,601 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:15:30,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:15:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:30,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:15:30,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:15:30,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:15:30,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:30,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89240939] [2021-11-20 23:15:30,708 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:15:30,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146941017] [2021-11-20 23:15:30,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146941017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:15:30,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [923433355] [2021-11-20 23:15:30,713 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:15:30,713 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:15:30,713 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:15:30,713 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:15:30,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:15:30,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:30,768 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-20 23:15:30,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-20 23:15:30,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:30,852 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:15:30,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:15:30,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:30,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:30,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 90 [2021-11-20 23:15:31,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:15:31,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:31,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 52 treesize of output 32 [2021-11-20 23:15:31,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:31,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:31,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:31,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:31,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:32,791 INFO L354 Elim1Store]: treesize reduction 214, result has 22.2 percent of original size [2021-11-20 23:15:32,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 401 treesize of output 459 [2021-11-20 23:15:37,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:37,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:15:37,126 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 1 case distinctions, treesize of input 64 treesize of output 56 [2021-11-20 23:15:37,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:37,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:37,492 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-20 23:15:37,493 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 5 case distinctions, treesize of input 244 treesize of output 221 [2021-11-20 23:15:43,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:43,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:43,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 63 treesize of output 38 [2021-11-20 23:15:46,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:46,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:46,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:46,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 148 [2021-11-20 23:15:46,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:15:46,997 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 22 treesize of output 13 [2021-11-20 23:15:47,030 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 24 treesize of output 15 [2021-11-20 23:15:47,046 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 12 treesize of output 3 [2021-11-20 23:15:50,671 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:15:51,145 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:15:51,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:15:51,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-20 23:15:51,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199399459] [2021-11-20 23:15:51,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:15:51,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:15:51,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:51,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:15:51,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:15:51,149 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-11-20 23:15:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:51,195 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-11-20 23:15:51,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:15:51,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 23:15:51,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:51,197 INFO L225 Difference]: With dead ends: 20 [2021-11-20 23:15:51,197 INFO L226 Difference]: Without dead ends: 13 [2021-11-20 23:15:51,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:15:51,199 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:51,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:15:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-20 23:15:51,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-20 23:15:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:15:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-20 23:15:51,204 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-11-20 23:15:51,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:51,204 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-20 23:15:51,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-11-20 23:15:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-20 23:15:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 23:15:51,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:51,205 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:51,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:51,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:51,406 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:51,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:51,406 INFO L85 PathProgramCache]: Analyzing trace with hash 286903242, now seen corresponding path program 2 times [2021-11-20 23:15:51,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:51,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168901454] [2021-11-20 23:15:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:51,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:51,411 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:15:51,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87398593] [2021-11-20 23:15:51,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:15:51,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:15:51,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:15:51,419 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:15:51,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:15:51,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 23:15:51,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:15:51,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 23:15:51,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:51,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:15:51,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 108 [2021-11-20 23:15:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:15:52,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:52,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:15:52,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 168 [2021-11-20 23:15:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:15:53,428 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:53,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168901454] [2021-11-20 23:15:53,428 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:15:53,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87398593] [2021-11-20 23:15:53,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87398593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:15:53,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1417521245] [2021-11-20 23:15:53,431 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:15:53,431 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:15:53,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:15:53,432 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:15:53,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:15:53,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:53,499 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:15:53,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:15:53,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:53,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-20 23:15:53,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:53,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:53,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 90 [2021-11-20 23:15:53,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:53,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-11-20 23:15:54,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:54,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:54,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:54,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:54,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:15:54,936 INFO L354 Elim1Store]: treesize reduction 214, result has 22.2 percent of original size [2021-11-20 23:15:54,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 401 treesize of output 459 [2021-11-20 23:15:58,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:58,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:15:58,699 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 1 case distinctions, treesize of input 64 treesize of output 56 [2021-11-20 23:15:59,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:59,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:15:59,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 76 treesize of output 47 [2021-11-20 23:16:05,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:05,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:05,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 53 treesize of output 28 [2021-11-20 23:16:06,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:06,795 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 42 treesize of output 21 [2021-11-20 23:16:11,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:11,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:11,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:11,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 148 [2021-11-20 23:16:11,461 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 24 treesize of output 15 [2021-11-20 23:16:11,497 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 24 treesize of output 15 [2021-11-20 23:16:11,550 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 12 treesize of output 3 [2021-11-20 23:16:11,623 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 22 treesize of output 13 [2021-11-20 23:16:16,771 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:17,364 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:17,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:16:17,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 23:16:17,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383185253] [2021-11-20 23:16:17,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:17,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:16:17,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:17,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:16:17,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-20 23:16:17,366 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 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) [2021-11-20 23:16:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:17,869 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-20 23:16:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:16:17,870 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 23:16:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:17,870 INFO L225 Difference]: With dead ends: 21 [2021-11-20 23:16:17,870 INFO L226 Difference]: Without dead ends: 19 [2021-11-20 23:16:17,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:16:17,872 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:17,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2021-11-20 23:16:17,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-20 23:16:17,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-20 23:16:17,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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) [2021-11-20 23:16:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-20 23:16:17,877 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2021-11-20 23:16:17,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:17,878 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-20 23:16:17,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 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) [2021-11-20 23:16:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-20 23:16:17,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 23:16:17,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:17,879 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2021-11-20 23:16:17,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 23:16:18,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:18,088 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:18,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2126779670, now seen corresponding path program 3 times [2021-11-20 23:16:18,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:18,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357489371] [2021-11-20 23:16:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:18,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:18,093 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:16:18,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40241373] [2021-11-20 23:16:18,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:16:18,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:18,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:18,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:18,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:16:18,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:16:18,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:16:18,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:16:18,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 23:16:18,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 23:16:18,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:18,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357489371] [2021-11-20 23:16:18,320 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:16:18,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40241373] [2021-11-20 23:16:18,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40241373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:18,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [628122773] [2021-11-20 23:16:18,323 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:16:18,323 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:18,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:18,324 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:18,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:18,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:18,376 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-20 23:16:18,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-20 23:16:18,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:18,456 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:16:18,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:16:18,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:18,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:18,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 116 [2021-11-20 23:16:18,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:18,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 54 treesize of output 33 [2021-11-20 23:16:18,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:18,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:18,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:18,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:18,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:20,006 INFO L354 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2021-11-20 23:16:20,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 410 treesize of output 460 [2021-11-20 23:16:22,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:23,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:23,014 INFO L244 Elim1Store]: Index analysis took 195 ms [2021-11-20 23:16:23,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 68 treesize of output 42 [2021-11-20 23:16:23,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:23,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:23,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:23,216 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-20 23:16:23,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 253 treesize of output 210 [2021-11-20 23:16:28,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:28,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:28,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 73 treesize of output 43 [2021-11-20 23:16:33,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:33,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:33,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:33,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 148 [2021-11-20 23:16:33,387 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 24 treesize of output 15 [2021-11-20 23:16:33,429 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 24 treesize of output 15 [2021-11-20 23:16:33,491 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 12 treesize of output 3 [2021-11-20 23:16:33,571 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 22 treesize of output 13 [2021-11-20 23:16:38,250 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:38,622 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:38,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:16:38,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-11-20 23:16:38,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772154041] [2021-11-20 23:16:38,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:38,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:16:38,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:38,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:16:38,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:16:38,624 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:38,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:38,758 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-11-20 23:16:38,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:16:38,759 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 23:16:38,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:38,760 INFO L225 Difference]: With dead ends: 38 [2021-11-20 23:16:38,760 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 23:16:38,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:16:38,761 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:38,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 23:16:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-20 23:16:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-20 23:16:38,769 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2021-11-20 23:16:38,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:38,769 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-20 23:16:38,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:38,769 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-20 23:16:38,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 23:16:38,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:38,770 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1] [2021-11-20 23:16:38,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:38,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:38,984 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:38,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:38,984 INFO L85 PathProgramCache]: Analyzing trace with hash -953525078, now seen corresponding path program 4 times [2021-11-20 23:16:38,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:38,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409102750] [2021-11-20 23:16:38,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:38,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:38,988 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:16:38,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970772262] [2021-11-20 23:16:38,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:16:38,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:38,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:38,998 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:38,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:16:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:39,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 23:16:39,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 23:16:39,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 23:16:39,424 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:39,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409102750] [2021-11-20 23:16:39,424 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:16:39,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970772262] [2021-11-20 23:16:39,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970772262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:16:39,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811817976] [2021-11-20 23:16:39,430 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:16:39,430 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:39,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:39,430 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:39,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:39,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:39,484 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:16:39,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:16:39,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:39,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-20 23:16:39,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:39,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:39,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 90 [2021-11-20 23:16:39,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:16:39,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:39,775 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 41 treesize of output 25 [2021-11-20 23:16:39,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:39,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:39,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:39,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:39,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:40,988 INFO L354 Elim1Store]: treesize reduction 214, result has 22.2 percent of original size [2021-11-20 23:16:40,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 401 treesize of output 459 [2021-11-20 23:16:45,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:45,825 INFO L244 Elim1Store]: Index analysis took 156 ms [2021-11-20 23:16:45,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:16:45,872 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 1 case distinctions, treesize of input 64 treesize of output 56 [2021-11-20 23:16:45,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:45,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:45,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 89 treesize of output 56 [2021-11-20 23:16:48,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:48,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:16:48,432 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 1 case distinctions, treesize of input 52 treesize of output 44 [2021-11-20 23:16:51,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:51,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:51,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:51,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 148 [2021-11-20 23:16:51,991 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 12 treesize of output 3 [2021-11-20 23:16:52,031 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 24 treesize of output 15 [2021-11-20 23:16:52,108 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 22 treesize of output 13 [2021-11-20 23:16:57,026 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:16:57,497 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:16:57,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:16:57,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-11-20 23:16:57,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331752063] [2021-11-20 23:16:57,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:16:57,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 23:16:57,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:57,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 23:16:57,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2021-11-20 23:16:57,499 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:57,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:57,653 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-11-20 23:16:57,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 23:16:57,654 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-20 23:16:57,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:57,655 INFO L225 Difference]: With dead ends: 50 [2021-11-20 23:16:57,655 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 23:16:57,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2021-11-20 23:16:57,657 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:57,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:16:57,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 23:16:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-20 23:16:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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) [2021-11-20 23:16:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-11-20 23:16:57,665 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 24 [2021-11-20 23:16:57,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:57,666 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-11-20 23:16:57,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:16:57,666 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-11-20 23:16:57,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 23:16:57,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:57,667 INFO L514 BasicCegarLoop]: trace histogram [22, 4, 3, 3, 1, 1, 1, 1] [2021-11-20 23:16:57,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:57,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:57,868 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:57,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:57,868 INFO L85 PathProgramCache]: Analyzing trace with hash 947802154, now seen corresponding path program 5 times [2021-11-20 23:16:57,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:57,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159337954] [2021-11-20 23:16:57,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:57,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:57,874 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:16:57,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117962358] [2021-11-20 23:16:57,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:16:57,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:57,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:57,877 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:57,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:16:58,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 23:16:58,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:16:58,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 23:16:58,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:59,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:16:59,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 125 treesize of output 237 [2021-11-20 23:16:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-20 23:16:59,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:02,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:17:02,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 219 treesize of output 235 [2021-11-20 23:17:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-20 23:17:38,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:17:38,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159337954] [2021-11-20 23:17:38,574 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:17:38,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117962358] [2021-11-20 23:17:38,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117962358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:17:38,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [199790388] [2021-11-20 23:17:38,577 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:17:38,577 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:17:38,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:17:38,577 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:17:38,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:17:38,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:38,629 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:17:38,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:17:38,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:38,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-20 23:17:38,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:38,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:38,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 116 [2021-11-20 23:17:38,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:17:38,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:38,873 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 50 treesize of output 29 [2021-11-20 23:17:38,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:38,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:38,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:38,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 206 [2021-11-20 23:17:39,087 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 24 treesize of output 15 [2021-11-20 23:17:39,130 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 24 treesize of output 15 [2021-11-20 23:17:39,257 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 22 treesize of output 13 [2021-11-20 23:17:39,330 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 12 treesize of output 3 [2021-11-20 23:17:39,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:39,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:39,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:39,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 148 [2021-11-20 23:17:39,647 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 22 treesize of output 13 [2021-11-20 23:17:39,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:17:39,730 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 24 treesize of output 15 [2021-11-20 23:17:39,779 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 12 treesize of output 3 [2021-11-20 23:17:44,844 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:17:45,759 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:17:45,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:17:45,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-20 23:17:45,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715941338] [2021-11-20 23:17:45,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:17:45,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 23:17:45,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:17:45,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 23:17:45,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:17:45,760 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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) [2021-11-20 23:17:53,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:53,479 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-11-20 23:17:53,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 23:17:53,479 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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 36 [2021-11-20 23:17:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:53,480 INFO L225 Difference]: With dead ends: 51 [2021-11-20 23:17:53,480 INFO L226 Difference]: Without dead ends: 49 [2021-11-20 23:17:53,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-11-20 23:17:53,486 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:53,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2021-11-20 23:17:53,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-20 23:17:53,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-20 23:17:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 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) [2021-11-20 23:17:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-11-20 23:17:53,498 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 36 [2021-11-20 23:17:53,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:53,498 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-11-20 23:17:53,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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) [2021-11-20 23:17:53,498 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-11-20 23:17:53,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 23:17:53,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:53,500 INFO L514 BasicCegarLoop]: trace histogram [22, 8, 7, 7, 1, 1, 1, 1] [2021-11-20 23:17:53,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 23:17:53,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:53,728 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:17:53,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:53,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2142447210, now seen corresponding path program 6 times [2021-11-20 23:17:53,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:17:53,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230665105] [2021-11-20 23:17:53,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:53,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:17:53,733 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:17:53,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170378984] [2021-11-20 23:17:53,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:17:53,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:53,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:17:53,738 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:17:53,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:17:53,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:17:53,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:17:53,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 23:17:53,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 23:17:54,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 23:17:55,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:17:55,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230665105] [2021-11-20 23:17:55,069 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:17:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170378984] [2021-11-20 23:17:55,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170378984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:17:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1377409692] [2021-11-20 23:17:55,070 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:17:55,070 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:17:55,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:17:55,071 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:17:55,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:17:55,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:55,112 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-20 23:17:55,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-20 23:17:55,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:55,161 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:17:55,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:17:55,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:55,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:55,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 90 [2021-11-20 23:17:55,303 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:17:55,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:55,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 29 [2021-11-20 23:17:55,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:55,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:55,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:55,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:55,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:17:57,021 INFO L354 Elim1Store]: treesize reduction 214, result has 22.2 percent of original size [2021-11-20 23:17:57,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 401 treesize of output 459 [2021-11-20 23:18:01,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:18:01,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:01,296 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-20 23:18:01,297 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 5 case distinctions, treesize of input 314 treesize of output 303 [2021-11-20 23:18:03,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:03,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:03,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 66 treesize of output 37 [2021-11-20 23:18:05,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:05,255 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 42 treesize of output 21 [2021-11-20 23:18:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:07,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:07,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 63 treesize of output 38 [2021-11-20 23:18:10,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:10,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:11,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:11,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 148 [2021-11-20 23:18:11,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:18:11,099 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 22 treesize of output 13 [2021-11-20 23:18:11,133 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 24 treesize of output 15 [2021-11-20 23:18:11,189 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 12 treesize of output 3 [2021-11-20 23:18:21,329 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:18:27,559 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:18:27,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:18:27,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2021-11-20 23:18:27,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523344246] [2021-11-20 23:18:27,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:18:27,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 23:18:27,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:18:27,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 23:18:27,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1147, Invalid=1609, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 23:18:27,563 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 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) [2021-11-20 23:18:28,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:28,033 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2021-11-20 23:18:28,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 23:18:28,033 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 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) Word has length 48 [2021-11-20 23:18:28,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:28,034 INFO L225 Difference]: With dead ends: 98 [2021-11-20 23:18:28,034 INFO L226 Difference]: Without dead ends: 73 [2021-11-20 23:18:28,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1147, Invalid=1609, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 23:18:28,036 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:28,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:18:28,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-20 23:18:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-20 23:18:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 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) [2021-11-20 23:18:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-11-20 23:18:28,052 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 48 [2021-11-20 23:18:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:28,052 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-11-20 23:18:28,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 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) [2021-11-20 23:18:28,053 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-11-20 23:18:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 23:18:28,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:28,055 INFO L514 BasicCegarLoop]: trace histogram [46, 8, 7, 7, 1, 1, 1, 1] [2021-11-20 23:18:28,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 23:18:28,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 23:18:28,260 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:18:28,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:28,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2126826858, now seen corresponding path program 7 times [2021-11-20 23:18:28,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:18:28,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994679682] [2021-11-20 23:18:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:28,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:18:28,267 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:18:28,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904604954] [2021-11-20 23:18:28,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:18:28,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:18:28,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:18:28,268 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:18:28,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 23:18:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:28,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 23:18:28,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:18:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 23:18:29,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:18:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 23:18:34,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:18:34,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994679682] [2021-11-20 23:18:34,205 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:18:34,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904604954] [2021-11-20 23:18:34,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904604954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:18:34,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [874604449] [2021-11-20 23:18:34,207 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:18:34,208 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:18:34,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:18:34,208 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:18:34,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:18:34,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:34,244 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-20 23:18:34,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-20 23:18:34,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:34,312 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:18:34,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 23:18:34,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:34,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:34,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 90 [2021-11-20 23:18:34,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:34,454 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 45 treesize of output 29 [2021-11-20 23:18:34,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:34,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:34,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:34,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:34,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:18:35,690 INFO L354 Elim1Store]: treesize reduction 214, result has 22.2 percent of original size [2021-11-20 23:18:35,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 401 treesize of output 459 [2021-11-20 23:18:39,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:18:39,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:39,879 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-20 23:18:39,880 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 5 case distinctions, treesize of input 314 treesize of output 303 [2021-11-20 23:18:41,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:41,961 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 49 treesize of output 24 [2021-11-20 23:18:42,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:42,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:42,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 73 treesize of output 40 [2021-11-20 23:18:47,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:47,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:47,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 56 treesize of output 35 [2021-11-20 23:18:50,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:50,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:50,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:50,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 148 [2021-11-20 23:18:50,545 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 12 treesize of output 3 [2021-11-20 23:18:50,580 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 24 treesize of output 15 [2021-11-20 23:18:50,604 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 22 treesize of output 13 [2021-11-20 23:18:59,986 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:19:09,072 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:19:09,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:19:09,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2021-11-20 23:19:09,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985099869] [2021-11-20 23:19:09,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:19:09,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-20 23:19:09,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:19:09,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-20 23:19:09,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4579, Invalid=5521, Unknown=0, NotChecked=0, Total=10100 [2021-11-20 23:19:09,079 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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) [2021-11-20 23:19:09,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:09,691 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2021-11-20 23:19:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-20 23:19:09,692 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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 72 [2021-11-20 23:19:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:09,693 INFO L225 Difference]: With dead ends: 146 [2021-11-20 23:19:09,693 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 23:19:09,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=4579, Invalid=5521, Unknown=0, NotChecked=0, Total=10100 [2021-11-20 23:19:09,698 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:09,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:19:09,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 23:19:09,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-20 23:19:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 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) [2021-11-20 23:19:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-11-20 23:19:09,724 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 72 [2021-11-20 23:19:09,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:09,724 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-11-20 23:19:09,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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) [2021-11-20 23:19:09,725 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-11-20 23:19:09,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 23:19:09,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:09,727 INFO L514 BasicCegarLoop]: trace histogram [94, 8, 7, 7, 1, 1, 1, 1] [2021-11-20 23:19:09,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:19:09,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:19:09,942 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:09,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:09,942 INFO L85 PathProgramCache]: Analyzing trace with hash 429464426, now seen corresponding path program 8 times [2021-11-20 23:19:09,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:19:09,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112592862] [2021-11-20 23:19:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:09,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:19:09,951 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:19:09,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539600569] [2021-11-20 23:19:09,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:19:09,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:19:09,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:19:09,952 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:19:09,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4198f25f-29ea-4ef3-a3dd-c644a12e8076/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 23:19:15,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-20 23:19:15,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:19:15,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 23:19:15,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:19:17,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:19:17,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 165 treesize of output 437 [2021-11-20 23:19:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4542 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-11-20 23:19:19,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:19:40,703 WARN L227 SmtUtils]: Spent 9.99s on a formula simplification. DAG size of input: 126 DAG size of output: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:20:20,504 WARN L227 SmtUtils]: Spent 35.69s on a formula simplification. DAG size of input: 143 DAG size of output: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:21:20,755 WARN L227 SmtUtils]: Spent 52.56s on a formula simplification. DAG size of input: 160 DAG size of output: 153 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:22:01,099 WARN L227 SmtUtils]: Spent 32.59s on a formula simplification that was a NOOP. DAG size: 153 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:22:01,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:22:01,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 576 treesize of output 848 [2021-11-20 23:24:47,736 WARN L227 SmtUtils]: Spent 8.57s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)