./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array15_pattern.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_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/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_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array15_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/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_cec000ef-1882-4117-865b-28c48ffbf65f/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 511c1484167d1d7d90ff27dae8a1569edd7c5a72fd917e4f05baeab770e0fcd4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:35:05,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:35:05,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:35:05,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:35:05,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:35:05,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:35:05,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:35:05,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:35:05,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:35:05,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:35:05,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:35:05,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:35:05,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:35:05,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:35:05,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:35:05,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:35:05,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:35:05,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:35:05,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:35:05,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:35:05,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:35:05,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:35:05,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:35:05,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:35:05,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:35:05,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:35:05,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:35:05,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:35:05,594 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:35:05,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:35:05,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:35:05,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:35:05,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:35:05,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:35:05,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:35:05,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:35:05,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:35:05,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:35:05,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:35:05,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:35:05,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:35:05,607 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:35:05,658 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:35:05,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:35:05,661 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:35:05,661 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:35:05,662 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:35:05,666 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:35:05,666 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:35:05,667 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:35:05,667 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:35:05,667 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:35:05,667 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:35:05,667 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:35:05,668 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:35:05,668 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:35:05,668 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:35:05,668 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:35:05,669 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:35:05,669 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:35:05,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:35:05,672 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:35:05,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:35:05,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:35:05,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:35:05,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:35:05,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:35:05,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:35:05,676 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:35:05,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:35:05,677 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:35:05,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:35:05,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:35:05,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:35:05,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:35:05,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:35:05,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:35:05,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:35:05,679 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:35:05,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:35:05,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:35:05,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:35:05,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:35:05,681 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_cec000ef-1882-4117-865b-28c48ffbf65f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 511c1484167d1d7d90ff27dae8a1569edd7c5a72fd917e4f05baeab770e0fcd4 [2021-11-21 00:35:06,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:35:06,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:35:06,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:35:06,048 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:35:06,049 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:35:06,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-patterns/array15_pattern.c [2021-11-21 00:35:06,124 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/data/47af7516e/65c7681029a646e1ad0f6a4f47180ffb/FLAG152263513 [2021-11-21 00:35:06,633 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:35:06,634 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/sv-benchmarks/c/array-patterns/array15_pattern.c [2021-11-21 00:35:06,640 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/data/47af7516e/65c7681029a646e1ad0f6a4f47180ffb/FLAG152263513 [2021-11-21 00:35:07,027 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/data/47af7516e/65c7681029a646e1ad0f6a4f47180ffb [2021-11-21 00:35:07,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:35:07,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:35:07,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:35:07,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:35:07,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:35:07,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:35:07" (1/1) ... [2021-11-21 00:35:07,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@522b4b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:07, skipping insertion in model container [2021-11-21 00:35:07,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:35:07" (1/1) ... [2021-11-21 00:35:07,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:35:07,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:35:07,226 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_cec000ef-1882-4117-865b-28c48ffbf65f/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2021-11-21 00:35:07,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:35:07,293 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:35:07,320 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_cec000ef-1882-4117-865b-28c48ffbf65f/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2021-11-21 00:35:07,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:35:07,360 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:35:07,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:07 WrapperNode [2021-11-21 00:35:07,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:35:07,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:35:07,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:35:07,362 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:35:07,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:07" (1/1) ... [2021-11-21 00:35:07,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:07" (1/1) ... [2021-11-21 00:35:07,412 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2021-11-21 00:35:07,413 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:35:07,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:35:07,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:35:07,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:35:07,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:07" (1/1) ... [2021-11-21 00:35:07,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:07" (1/1) ... [2021-11-21 00:35:07,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:07" (1/1) ... [2021-11-21 00:35:07,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:07" (1/1) ... [2021-11-21 00:35:07,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:07" (1/1) ... [2021-11-21 00:35:07,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:07" (1/1) ... [2021-11-21 00:35:07,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:07" (1/1) ... [2021-11-21 00:35:07,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:35:07,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:35:07,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:35:07,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:35:07,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:07" (1/1) ... [2021-11-21 00:35:07,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:35:07,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:35:07,491 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:35:07,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:35:07,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:35:07,538 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:35:07,538 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:35:07,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:35:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:35:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:35:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:35:07,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:35:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:35:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:35:07,606 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:35:07,608 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:35:07,774 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:35:07,836 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:35:07,837 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-21 00:35:07,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:35:07 BoogieIcfgContainer [2021-11-21 00:35:07,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:35:07,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:35:07,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:35:07,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:35:07,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:35:07" (1/3) ... [2021-11-21 00:35:07,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27554f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:35:07, skipping insertion in model container [2021-11-21 00:35:07,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:35:07" (2/3) ... [2021-11-21 00:35:07,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27554f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:35:07, skipping insertion in model container [2021-11-21 00:35:07,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:35:07" (3/3) ... [2021-11-21 00:35:07,862 INFO L111 eAbstractionObserver]: Analyzing ICFG array15_pattern.c [2021-11-21 00:35:07,867 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:35:07,869 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:35:07,934 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:35:07,955 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 [2021-11-21 00:35:07,956 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:35:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:35:07,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:35:07,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:07,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:07,979 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:07,985 INFO L85 PathProgramCache]: Analyzing trace with hash 878430548, now seen corresponding path program 1 times [2021-11-21 00:35:07,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:07,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702943821] [2021-11-21 00:35:07,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:07,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:08,074 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:35:08,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700094612] [2021-11-21 00:35:08,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:08,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:08,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:35:08,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:35:08,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:35:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:08,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 00:35:08,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:35:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:35:08,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:35:08,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:08,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702943821] [2021-11-21 00:35:08,321 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:35:08,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700094612] [2021-11-21 00:35:08,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700094612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:35:08,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:35:08,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:35:08,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446795719] [2021-11-21 00:35:08,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:35:08,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:35:08,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:08,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:35:08,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:35:08,373 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:35:08,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:08,435 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2021-11-21 00:35:08,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:35:08,438 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-21 00:35:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:08,453 INFO L225 Difference]: With dead ends: 28 [2021-11-21 00:35:08,454 INFO L226 Difference]: Without dead ends: 18 [2021-11-21 00:35:08,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:35:08,463 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:08,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:35:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-21 00:35:08,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-21 00:35:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:35:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-21 00:35:08,514 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2021-11-21 00:35:08,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:08,515 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-21 00:35:08,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:35:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-21 00:35:08,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 00:35:08,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:08,518 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:08,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:35:08,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 00:35:08,742 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:08,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:08,743 INFO L85 PathProgramCache]: Analyzing trace with hash -222468068, now seen corresponding path program 1 times [2021-11-21 00:35:08,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:08,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978112038] [2021-11-21 00:35:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:08,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:08,756 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:35:08,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129240941] [2021-11-21 00:35:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:08,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:08,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:35:08,758 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:35:08,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:35:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:08,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:35:08,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:35:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:35:08,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:35:08,962 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:08,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978112038] [2021-11-21 00:35:08,963 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:35:08,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129240941] [2021-11-21 00:35:08,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129240941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:35:08,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:35:08,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:35:08,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819328746] [2021-11-21 00:35:08,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:35:08,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:35:08,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:08,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:35:08,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:35:08,969 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:35:09,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:09,076 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2021-11-21 00:35:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:35:09,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2021-11-21 00:35:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:09,081 INFO L225 Difference]: With dead ends: 37 [2021-11-21 00:35:09,081 INFO L226 Difference]: Without dead ends: 24 [2021-11-21 00:35:09,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:35:09,086 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:09,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 21 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:35:09,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-21 00:35:09,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-21 00:35:09,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:35:09,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-21 00:35:09,104 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 19 [2021-11-21 00:35:09,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:09,105 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-21 00:35:09,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:35:09,106 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-21 00:35:09,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 00:35:09,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:09,108 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:09,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:35:09,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:09,327 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:09,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:09,328 INFO L85 PathProgramCache]: Analyzing trace with hash 345540553, now seen corresponding path program 1 times [2021-11-21 00:35:09,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:09,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943241285] [2021-11-21 00:35:09,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:09,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:09,337 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:35:09,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651234492] [2021-11-21 00:35:09,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:09,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:09,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:35:09,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:35:09,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:35:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:09,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:35:09,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:35:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:35:09,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:35:09,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:09,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943241285] [2021-11-21 00:35:09,512 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:35:09,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651234492] [2021-11-21 00:35:09,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651234492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:35:09,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:35:09,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:35:09,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356619435] [2021-11-21 00:35:09,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:35:09,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:35:09,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:09,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:35:09,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:35:09,516 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:35:09,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:09,581 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2021-11-21 00:35:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:35:09,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-11-21 00:35:09,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:09,594 INFO L225 Difference]: With dead ends: 40 [2021-11-21 00:35:09,594 INFO L226 Difference]: Without dead ends: 24 [2021-11-21 00:35:09,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:35:09,596 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:09,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:35:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-21 00:35:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-21 00:35:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:35:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-21 00:35:09,603 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 23 [2021-11-21 00:35:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:09,603 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-21 00:35:09,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:35:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-21 00:35:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 00:35:09,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:09,605 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:09,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:35:09,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:09,822 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:09,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:09,823 INFO L85 PathProgramCache]: Analyzing trace with hash 2135958800, now seen corresponding path program 1 times [2021-11-21 00:35:09,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:09,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145260357] [2021-11-21 00:35:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:09,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:09,833 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:35:09,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087351146] [2021-11-21 00:35:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:09,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:09,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:35:09,835 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:35:09,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:35:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:09,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 00:35:09,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:35:10,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:35:10,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:35:10,551 INFO L354 Elim1Store]: treesize reduction 350, result has 2.0 percent of original size [2021-11-21 00:35:10,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 171 treesize of output 139 [2021-11-21 00:35:10,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:35:10,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 22 [2021-11-21 00:35:10,844 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 42 treesize of output 30 [2021-11-21 00:35:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:35:10,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:35:42,329 WARN L227 SmtUtils]: Spent 17.34s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:35:55,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:55,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145260357] [2021-11-21 00:35:55,768 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:35:55,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087351146] [2021-11-21 00:35:55,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087351146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:35:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1969726518] [2021-11-21 00:35:55,786 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-21 00:35:55,787 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:35:55,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:35:55,796 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:35:55,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:35:56,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:56,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:56,237 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 00:35:56,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-21 00:35:56,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:56,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:35:56,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 41 treesize of output 49 [2021-11-21 00:35:56,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:56,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:56,767 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:35:56,768 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 [2021-11-21 00:35:57,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:57,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:57,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 92 [2021-11-21 00:35:57,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:57,284 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 21 [2021-11-21 00:35:58,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:58,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:58,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:35:58,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:58,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:58,187 INFO L354 Elim1Store]: treesize reduction 120, result has 11.1 percent of original size [2021-11-21 00:35:58,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 312 [2021-11-21 00:35:58,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:58,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:58,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:58,252 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-21 00:35:58,252 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 297 treesize of output 233 [2021-11-21 00:35:59,681 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:35:59,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:35:59,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:35:59,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:01,014 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 00:36:01,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 178 [2021-11-21 00:36:01,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:01,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:01,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:36:01,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 117 [2021-11-21 00:36:03,624 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 00:36:03,644 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:36:05,310 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:36:05,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:36:05,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-21 00:36:05,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546705415] [2021-11-21 00:36:05,310 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 00:36:05,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:36:05,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:05,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:36:05,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1101, Unknown=2, NotChecked=0, Total=1260 [2021-11-21 00:36:05,314 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:36:07,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:07,794 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-11-21 00:36:07,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 00:36:07,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-11-21 00:36:07,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:07,797 INFO L225 Difference]: With dead ends: 48 [2021-11-21 00:36:07,797 INFO L226 Difference]: Without dead ends: 45 [2021-11-21 00:36:07,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=260, Invalid=1543, Unknown=3, NotChecked=0, Total=1806 [2021-11-21 00:36:07,799 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:07,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 105 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 134 Invalid, 0 Unknown, 31 Unchecked, 0.3s Time] [2021-11-21 00:36:07,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-21 00:36:07,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-11-21 00:36:07,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:36:07,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-11-21 00:36:07,808 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 25 [2021-11-21 00:36:07,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:07,809 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-11-21 00:36:07,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:36:07,809 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-11-21 00:36:07,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 00:36:07,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:07,810 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:36:07,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:36:08,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-21 00:36:08,010 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:08,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:08,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1777379230, now seen corresponding path program 2 times [2021-11-21 00:36:08,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:08,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177411039] [2021-11-21 00:36:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:08,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:08,021 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:36:08,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243041134] [2021-11-21 00:36:08,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:36:08,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:08,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:08,023 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:08,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:36:08,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:36:08,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:36:08,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:36:08,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:36:08,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:36:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:36:08,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:08,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177411039] [2021-11-21 00:36:08,252 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:36:08,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243041134] [2021-11-21 00:36:08,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243041134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:36:08,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1061541230] [2021-11-21 00:36:08,258 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-21 00:36:08,258 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:36:08,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:36:08,260 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:36:08,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:36:08,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,542 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:36:08,543 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 [2021-11-21 00:36:08,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-21 00:36:08,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-11-21 00:36:08,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:08,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:08,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 92 [2021-11-21 00:36:09,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,005 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 18 [2021-11-21 00:36:09,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:09,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,638 INFO L354 Elim1Store]: treesize reduction 128, result has 10.5 percent of original size [2021-11-21 00:36:09,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 316 [2021-11-21 00:36:09,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:09,807 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-11-21 00:36:09,807 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 299 treesize of output 233 [2021-11-21 00:36:10,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:10,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:36:10,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:36:10,964 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:11,953 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 00:36:11,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 178 [2021-11-21 00:36:12,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:36:12,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 98 [2021-11-21 00:36:13,826 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 00:36:13,844 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:36:15,078 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:36:15,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:36:15,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-21 00:36:15,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310771354] [2021-11-21 00:36:15,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:36:15,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:36:15,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:15,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:36:15,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-11-21 00:36:15,080 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:36:15,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:15,266 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2021-11-21 00:36:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:36:15,269 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-11-21 00:36:15,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:15,270 INFO L225 Difference]: With dead ends: 66 [2021-11-21 00:36:15,270 INFO L226 Difference]: Without dead ends: 51 [2021-11-21 00:36:15,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-11-21 00:36:15,273 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:15,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 63 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:36:15,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-21 00:36:15,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-11-21 00:36:15,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:36:15,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2021-11-21 00:36:15,285 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 26 [2021-11-21 00:36:15,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:15,286 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2021-11-21 00:36:15,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:36:15,286 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2021-11-21 00:36:15,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 00:36:15,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:15,288 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:36:15,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:36:15,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:15,502 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:15,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:15,502 INFO L85 PathProgramCache]: Analyzing trace with hash 771940058, now seen corresponding path program 3 times [2021-11-21 00:36:15,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:15,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479159528] [2021-11-21 00:36:15,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:15,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:15,509 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:36:15,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085947870] [2021-11-21 00:36:15,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:36:15,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:15,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:15,510 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:15,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:36:15,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:36:15,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:36:15,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:36:15,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:36:15,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:36:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:36:15,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:15,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479159528] [2021-11-21 00:36:15,742 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:36:15,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085947870] [2021-11-21 00:36:15,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085947870] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:36:15,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [812030468] [2021-11-21 00:36:15,745 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-21 00:36:15,745 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:36:15,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:36:15,746 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:36:15,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:36:15,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:15,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:16,057 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 00:36:16,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-21 00:36:16,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-11-21 00:36:16,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:16,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:16,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:36:16,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-11-21 00:36:16,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:16,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:16,298 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:36:16,298 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 [2021-11-21 00:36:16,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:16,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:16,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-21 00:36:16,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:16,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:16,923 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 47 treesize of output 21 [2021-11-21 00:36:17,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:17,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:17,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:17,576 INFO L354 Elim1Store]: treesize reduction 224, result has 23.5 percent of original size [2021-11-21 00:36:17,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 328 [2021-11-21 00:36:18,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:18,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,091 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-11-21 00:36:18,092 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 245 treesize of output 193 [2021-11-21 00:36:18,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:36:18,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:19,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:19,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:36:20,082 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 00:36:20,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 178 [2021-11-21 00:36:20,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:20,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:36:20,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 96 [2021-11-21 00:36:22,405 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 00:36:22,424 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:36:23,680 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:36:23,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:36:23,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-21 00:36:23,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866608579] [2021-11-21 00:36:23,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:36:23,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:36:23,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:23,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:36:23,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:36:23,683 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:36:23,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:23,879 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2021-11-21 00:36:23,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:36:23,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2021-11-21 00:36:23,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:23,881 INFO L225 Difference]: With dead ends: 74 [2021-11-21 00:36:23,881 INFO L226 Difference]: Without dead ends: 56 [2021-11-21 00:36:23,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-11-21 00:36:23,883 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:23,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 65 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:36:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-21 00:36:23,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-11-21 00:36:23,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:36:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2021-11-21 00:36:23,894 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 28 [2021-11-21 00:36:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:23,894 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2021-11-21 00:36:23,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:36:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2021-11-21 00:36:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 00:36:23,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:23,896 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:36:23,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:36:24,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:24,111 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:24,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:24,112 INFO L85 PathProgramCache]: Analyzing trace with hash -870454119, now seen corresponding path program 4 times [2021-11-21 00:36:24,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:24,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012303838] [2021-11-21 00:36:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:24,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:24,121 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:36:24,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386157548] [2021-11-21 00:36:24,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:36:24,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:24,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:24,122 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:24,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:36:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:24,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:36:24,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:36:24,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:36:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:36:24,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:24,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012303838] [2021-11-21 00:36:24,332 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:36:24,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386157548] [2021-11-21 00:36:24,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386157548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:36:24,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1302617660] [2021-11-21 00:36:24,335 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-21 00:36:24,335 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:36:24,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:36:24,335 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:36:24,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:36:24,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:24,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:24,651 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 00:36:24,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-21 00:36:24,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:24,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:24,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:36:24,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 41 treesize of output 49 [2021-11-21 00:36:24,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:25,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:25,042 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:36:25,043 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 [2021-11-21 00:36:25,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:25,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:25,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 96 [2021-11-21 00:36:25,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:25,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:25,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 10 [2021-11-21 00:36:26,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:26,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:26,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:26,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:26,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:26,165 INFO L354 Elim1Store]: treesize reduction 130, result has 10.3 percent of original size [2021-11-21 00:36:26,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 284 treesize of output 320 [2021-11-21 00:36:26,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:27,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:27,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:27,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:27,110 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-21 00:36:27,110 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 362 treesize of output 276 [2021-11-21 00:36:27,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:27,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:36:27,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:36:27,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:28,616 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 00:36:28,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 178 [2021-11-21 00:36:28,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:28,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:36:28,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 98 [2021-11-21 00:36:30,615 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 00:36:30,638 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:36:31,759 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:36:31,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:36:31,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-21 00:36:31,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702863883] [2021-11-21 00:36:31,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:36:31,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:36:31,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:31,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:36:31,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:36:31,760 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:36:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:31,945 INFO L93 Difference]: Finished difference Result 106 states and 140 transitions. [2021-11-21 00:36:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:36:31,949 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2021-11-21 00:36:31,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:31,950 INFO L225 Difference]: With dead ends: 106 [2021-11-21 00:36:31,950 INFO L226 Difference]: Without dead ends: 71 [2021-11-21 00:36:31,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-11-21 00:36:31,951 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:31,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 90 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:36:31,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-21 00:36:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2021-11-21 00:36:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 44 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:36:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-11-21 00:36:31,963 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 29 [2021-11-21 00:36:31,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:31,963 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-11-21 00:36:31,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:36:31,964 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-11-21 00:36:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-21 00:36:31,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:31,965 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:36:31,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:36:32,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:32,166 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:32,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:32,166 INFO L85 PathProgramCache]: Analyzing trace with hash -350963172, now seen corresponding path program 5 times [2021-11-21 00:36:32,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:32,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532274604] [2021-11-21 00:36:32,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:32,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:32,174 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:36:32,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891135330] [2021-11-21 00:36:32,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:36:32,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:32,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:32,177 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:32,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:36:32,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:36:32,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:36:32,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:36:32,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:36:32,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:36:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:36:32,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:32,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532274604] [2021-11-21 00:36:32,412 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:36:32,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891135330] [2021-11-21 00:36:32,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891135330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:36:32,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1546430466] [2021-11-21 00:36:32,414 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-21 00:36:32,414 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:36:32,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:36:32,415 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:36:32,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:36:32,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:32,643 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:36:32,644 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 [2021-11-21 00:36:32,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:32,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:32,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-21 00:36:32,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:32,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-11-21 00:36:33,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:33,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-21 00:36:33,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:33,112 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 47 treesize of output 21 [2021-11-21 00:36:33,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:33,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:33,982 INFO L354 Elim1Store]: treesize reduction 224, result has 23.5 percent of original size [2021-11-21 00:36:33,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 328 [2021-11-21 00:36:35,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:35,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:35,161 INFO L354 Elim1Store]: treesize reduction 60, result has 4.8 percent of original size [2021-11-21 00:36:35,162 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 311 treesize of output 238 [2021-11-21 00:36:35,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:35,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:36:35,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:35,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:36:36,860 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 00:36:36,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 178 [2021-11-21 00:36:37,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:37,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:36:37,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 272 treesize of output 238 [2021-11-21 00:36:39,475 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 00:36:39,505 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:36:40,870 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:36:40,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:36:40,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-21 00:36:40,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511816739] [2021-11-21 00:36:40,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:36:40,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:36:40,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:40,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:36:40,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-11-21 00:36:40,872 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:36:40,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:40,994 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2021-11-21 00:36:40,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:36:40,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-11-21 00:36:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:40,996 INFO L225 Difference]: With dead ends: 79 [2021-11-21 00:36:40,996 INFO L226 Difference]: Without dead ends: 37 [2021-11-21 00:36:40,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-11-21 00:36:40,997 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:40,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 45 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:36:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-21 00:36:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-11-21 00:36:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:36:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-11-21 00:36:41,004 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 31 [2021-11-21 00:36:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:41,004 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-11-21 00:36:41,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:36:41,004 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-11-21 00:36:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 00:36:41,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:41,006 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:36:41,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:36:41,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 00:36:41,227 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:41,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:41,227 INFO L85 PathProgramCache]: Analyzing trace with hash 971328747, now seen corresponding path program 6 times [2021-11-21 00:36:41,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:41,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141685999] [2021-11-21 00:36:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:41,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:41,232 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:36:41,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353484440] [2021-11-21 00:36:41,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:36:41,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:41,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:41,235 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:41,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:36:41,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:36:41,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:36:41,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:36:41,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:36:41,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:36:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:36:41,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:41,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141685999] [2021-11-21 00:36:41,479 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:36:41,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353484440] [2021-11-21 00:36:41,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353484440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:36:41,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1758265086] [2021-11-21 00:36:41,484 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-21 00:36:41,484 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:36:41,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:36:41,485 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:36:41,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:36:41,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,699 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:36:41,699 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 [2021-11-21 00:36:41,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-21 00:36:41,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2021-11-21 00:36:42,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:42,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:42,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-21 00:36:42,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:42,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:42,294 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 47 treesize of output 21 [2021-11-21 00:36:42,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:42,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:42,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:42,963 INFO L354 Elim1Store]: treesize reduction 248, result has 19.7 percent of original size [2021-11-21 00:36:42,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 324 [2021-11-21 00:36:43,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:43,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:44,016 INFO L354 Elim1Store]: treesize reduction 64, result has 4.5 percent of original size [2021-11-21 00:36:44,016 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 249 treesize of output 190 [2021-11-21 00:36:44,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:44,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:36:44,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:36:44,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:45,759 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 00:36:45,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 178 [2021-11-21 00:36:45,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:45,841 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:46,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:36:46,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 89 [2021-11-21 00:36:47,743 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 00:36:47,760 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:36:49,024 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:36:49,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:36:49,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-21 00:36:49,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639231207] [2021-11-21 00:36:49,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:36:49,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:36:49,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:49,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:36:49,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:36:49,028 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:36:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:49,214 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2021-11-21 00:36:49,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:36:49,215 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-11-21 00:36:49,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:49,215 INFO L225 Difference]: With dead ends: 59 [2021-11-21 00:36:49,216 INFO L226 Difference]: Without dead ends: 34 [2021-11-21 00:36:49,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-11-21 00:36:49,217 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:49,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 56 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:36:49,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-21 00:36:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-21 00:36:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:36:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-21 00:36:49,223 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 34 [2021-11-21 00:36:49,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:49,224 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-21 00:36:49,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:36:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-21 00:36:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 00:36:49,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:49,225 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:36:49,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:36:49,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:49,430 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:49,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:49,430 INFO L85 PathProgramCache]: Analyzing trace with hash -12762058, now seen corresponding path program 7 times [2021-11-21 00:36:49,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:49,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554874903] [2021-11-21 00:36:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:49,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:49,435 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:36:49,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550785850] [2021-11-21 00:36:49,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:36:49,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:49,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:49,437 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:49,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:36:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:49,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-21 00:36:49,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:49,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:36:49,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 00:36:49,753 INFO L354 Elim1Store]: treesize reduction 132, result has 21.0 percent of original size [2021-11-21 00:36:49,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 91 [2021-11-21 00:36:49,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:49,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 7 [2021-11-21 00:36:49,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:49,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 7 [2021-11-21 00:36:49,965 INFO L354 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2021-11-21 00:36:49,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 98 [2021-11-21 00:36:49,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:49,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:49,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:49,991 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 48 treesize of output 20 [2021-11-21 00:36:50,111 INFO L354 Elim1Store]: treesize reduction 268, result has 18.0 percent of original size [2021-11-21 00:36:50,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 115 [2021-11-21 00:36:50,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:36:50,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:50,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 33 [2021-11-21 00:36:59,711 INFO L354 Elim1Store]: treesize reduction 615, result has 38.6 percent of original size [2021-11-21 00:36:59,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 191 treesize of output 512 [2021-11-21 00:37:25,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:25,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:25,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:25,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:25,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:25,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:25,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:25,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:25,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:26,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:26,022 INFO L244 Elim1Store]: Index analysis took 193 ms [2021-11-21 00:37:26,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 91 [2021-11-21 00:37:26,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:26,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:26,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:26,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:26,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:26,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:26,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:26,508 INFO L244 Elim1Store]: Index analysis took 364 ms [2021-11-21 00:37:27,115 INFO L354 Elim1Store]: treesize reduction 44, result has 78.2 percent of original size [2021-11-21 00:37:27,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 175 treesize of output 269 [2021-11-21 00:37:28,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:28,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:28,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:28,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:28,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:28,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:28,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 73 [2021-11-21 00:37:28,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:28,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:28,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:28,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:28,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:28,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:28,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:28,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:28,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:28,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:37:28,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 121 [2021-11-21 00:38:03,280 INFO L354 Elim1Store]: treesize reduction 1060, result has 1.2 percent of original size [2021-11-21 00:38:03,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 455 treesize of output 209 [2021-11-21 00:38:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:38:03,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:38:22,024 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse8 (mod c_~ARR_SIZE~0 4294967296))) (and (or (and (forall ((|ULTIMATE.start_main_~index2~0#1| Int)) (<= (let ((.cse1 (* (mod c_~ARR_SIZE~0 4294967296) 4))) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* (+ c_~ARR_SIZE~0 (* |ULTIMATE.start_main_~index2~0#1| (- 1))) (+ (- 17179869184) .cse1)) (* |ULTIMATE.start_main_~index2~0#1| 4)) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|)))) (+ (select .cse0 |c_ULTIMATE.start_main_~#array~0#1.offset|) 2 (select .cse0 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| 4)) (select .cse0 (+ (- 17179869184) .cse1 |c_ULTIMATE.start_main_~#array~0#1.offset|)) (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#array~0#1.offset| (- 17179869180))) |c_ULTIMATE.start_main_~sum~0#1|))) (* 2 c_~ARR_SIZE~0))) (forall ((|ULTIMATE.start_main_~index2~0#1| Int)) (<= (let ((.cse3 (* (mod c_~ARR_SIZE~0 4294967296) 4))) (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* (+ (- 2) c_~ARR_SIZE~0 (* |ULTIMATE.start_main_~index2~0#1| (- 1))) (+ (- 17179869184) .cse3)) (* |ULTIMATE.start_main_~index2~0#1| 4)) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|)))) (+ (select .cse2 |c_ULTIMATE.start_main_~#array~0#1.offset|) (select .cse2 (+ (- 17179869184) .cse3 |c_ULTIMATE.start_main_~#array~0#1.offset|)) 2 (select .cse2 (+ .cse3 |c_ULTIMATE.start_main_~#array~0#1.offset| (- 17179869180))) |c_ULTIMATE.start_main_~sum~0#1| (select .cse2 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| 4))))) (* 2 c_~ARR_SIZE~0))) (forall ((|ULTIMATE.start_main_~index1~0#1| Int) (|ULTIMATE.start_main_~index2~0#1| Int)) (or (= c_~ARR_SIZE~0 (+ |ULTIMATE.start_main_~index1~0#1| |ULTIMATE.start_main_~index2~0#1|)) (<= (let ((.cse5 (* (mod c_~ARR_SIZE~0 4294967296) 4))) (let ((.cse4 (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|)) (.cse7 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index1~0#1| .cse5) (* |ULTIMATE.start_main_~index2~0#1| 4)))) (store .cse6 .cse7 (select .cse6 .cse7))))) (+ (select .cse4 (+ (- 17179869184) .cse5 |c_ULTIMATE.start_main_~#array~0#1.offset|)) (select .cse4 (+ .cse5 |c_ULTIMATE.start_main_~#array~0#1.offset| (- 17179869180))) 2 (select .cse4 |c_ULTIMATE.start_main_~#array~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse4 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| 4))))) (* 2 c_~ARR_SIZE~0)) (= (+ |ULTIMATE.start_main_~index1~0#1| |ULTIMATE.start_main_~index2~0#1| 2) c_~ARR_SIZE~0)))) (<= .cse8 2147483647)) (or (< 2147483647 .cse8) (and (forall ((|ULTIMATE.start_main_~index1~0#1| Int) (|ULTIMATE.start_main_~index2~0#1| Int)) (or (= c_~ARR_SIZE~0 (+ |ULTIMATE.start_main_~index1~0#1| |ULTIMATE.start_main_~index2~0#1|)) (= (+ |ULTIMATE.start_main_~index1~0#1| |ULTIMATE.start_main_~index2~0#1| 2) c_~ARR_SIZE~0) (<= (let ((.cse10 (* (mod c_~ARR_SIZE~0 4294967296) 4))) (let ((.cse9 (let ((.cse11 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|)) (.cse12 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index1~0#1| .cse10) (* |ULTIMATE.start_main_~index2~0#1| 4)))) (store .cse11 .cse12 (select .cse11 .cse12))))) (+ (select .cse9 (+ .cse10 |c_ULTIMATE.start_main_~#array~0#1.offset| 4)) 2 (select .cse9 |c_ULTIMATE.start_main_~#array~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse9 (+ .cse10 |c_ULTIMATE.start_main_~#array~0#1.offset|)) (select .cse9 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| 4))))) (* 2 c_~ARR_SIZE~0)))) (forall ((|ULTIMATE.start_main_~index2~0#1| Int)) (<= (let ((.cse14 (* (mod c_~ARR_SIZE~0 4294967296) 4))) (let ((.cse13 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index2~0#1| 4) (* (+ c_~ARR_SIZE~0 (* |ULTIMATE.start_main_~index2~0#1| (- 1))) .cse14)) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|)))) (+ (select .cse13 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| 4)) 2 (select .cse13 (+ .cse14 |c_ULTIMATE.start_main_~#array~0#1.offset|)) (select .cse13 (+ .cse14 |c_ULTIMATE.start_main_~#array~0#1.offset| 4)) (select .cse13 |c_ULTIMATE.start_main_~#array~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|))) (* 2 c_~ARR_SIZE~0))) (forall ((|ULTIMATE.start_main_~index2~0#1| Int)) (<= (let ((.cse16 (* (mod c_~ARR_SIZE~0 4294967296) 4))) (let ((.cse15 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ (* (+ (- 2) c_~ARR_SIZE~0 (* |ULTIMATE.start_main_~index2~0#1| (- 1))) .cse16) |c_ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index2~0#1| 4)) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|)))) (+ (select .cse15 (+ .cse16 |c_ULTIMATE.start_main_~#array~0#1.offset| 4)) (select .cse15 |c_ULTIMATE.start_main_~#array~0#1.offset|) (select .cse15 (+ .cse16 |c_ULTIMATE.start_main_~#array~0#1.offset|)) 2 |c_ULTIMATE.start_main_~sum~0#1| (select .cse15 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| 4))))) (* 2 c_~ARR_SIZE~0))))))) is different from false [2021-11-21 00:38:24,029 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse8 (mod c_~ARR_SIZE~0 4294967296))) (and (or (and (forall ((|ULTIMATE.start_main_~index2~0#1| Int)) (<= (let ((.cse1 (* (mod c_~ARR_SIZE~0 4294967296) 4))) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* (+ c_~ARR_SIZE~0 (* |ULTIMATE.start_main_~index2~0#1| (- 1))) (+ (- 17179869184) .cse1)) (* |ULTIMATE.start_main_~index2~0#1| 4)) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|)))) (+ (select .cse0 |c_ULTIMATE.start_main_~#array~0#1.offset|) 2 (select .cse0 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| 4)) (select .cse0 (+ (- 17179869184) .cse1 |c_ULTIMATE.start_main_~#array~0#1.offset|)) (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#array~0#1.offset| (- 17179869180))) |c_ULTIMATE.start_main_~sum~0#1|))) (* 2 c_~ARR_SIZE~0))) (forall ((|ULTIMATE.start_main_~index2~0#1| Int)) (<= (let ((.cse3 (* (mod c_~ARR_SIZE~0 4294967296) 4))) (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* (+ (- 2) c_~ARR_SIZE~0 (* |ULTIMATE.start_main_~index2~0#1| (- 1))) (+ (- 17179869184) .cse3)) (* |ULTIMATE.start_main_~index2~0#1| 4)) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|)))) (+ (select .cse2 |c_ULTIMATE.start_main_~#array~0#1.offset|) (select .cse2 (+ (- 17179869184) .cse3 |c_ULTIMATE.start_main_~#array~0#1.offset|)) 2 (select .cse2 (+ .cse3 |c_ULTIMATE.start_main_~#array~0#1.offset| (- 17179869180))) |c_ULTIMATE.start_main_~sum~0#1| (select .cse2 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| 4))))) (* 2 c_~ARR_SIZE~0))) (forall ((|ULTIMATE.start_main_~index1~0#1| Int) (|ULTIMATE.start_main_~index2~0#1| Int)) (or (= c_~ARR_SIZE~0 (+ |ULTIMATE.start_main_~index1~0#1| |ULTIMATE.start_main_~index2~0#1|)) (<= (let ((.cse5 (* (mod c_~ARR_SIZE~0 4294967296) 4))) (let ((.cse4 (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|)) (.cse7 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index1~0#1| .cse5) (* |ULTIMATE.start_main_~index2~0#1| 4)))) (store .cse6 .cse7 (select .cse6 .cse7))))) (+ (select .cse4 (+ (- 17179869184) .cse5 |c_ULTIMATE.start_main_~#array~0#1.offset|)) (select .cse4 (+ .cse5 |c_ULTIMATE.start_main_~#array~0#1.offset| (- 17179869180))) 2 (select .cse4 |c_ULTIMATE.start_main_~#array~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse4 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| 4))))) (* 2 c_~ARR_SIZE~0)) (= (+ |ULTIMATE.start_main_~index1~0#1| |ULTIMATE.start_main_~index2~0#1| 2) c_~ARR_SIZE~0)))) (<= .cse8 2147483647)) (or (< 2147483647 .cse8) (and (forall ((|ULTIMATE.start_main_~index1~0#1| Int) (|ULTIMATE.start_main_~index2~0#1| Int)) (or (= c_~ARR_SIZE~0 (+ |ULTIMATE.start_main_~index1~0#1| |ULTIMATE.start_main_~index2~0#1|)) (= (+ |ULTIMATE.start_main_~index1~0#1| |ULTIMATE.start_main_~index2~0#1| 2) c_~ARR_SIZE~0) (<= (let ((.cse10 (* (mod c_~ARR_SIZE~0 4294967296) 4))) (let ((.cse9 (let ((.cse11 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|)) (.cse12 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index1~0#1| .cse10) (* |ULTIMATE.start_main_~index2~0#1| 4)))) (store .cse11 .cse12 (select .cse11 .cse12))))) (+ (select .cse9 (+ .cse10 |c_ULTIMATE.start_main_~#array~0#1.offset| 4)) 2 (select .cse9 |c_ULTIMATE.start_main_~#array~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse9 (+ .cse10 |c_ULTIMATE.start_main_~#array~0#1.offset|)) (select .cse9 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| 4))))) (* 2 c_~ARR_SIZE~0)))) (forall ((|ULTIMATE.start_main_~index2~0#1| Int)) (<= (let ((.cse14 (* (mod c_~ARR_SIZE~0 4294967296) 4))) (let ((.cse13 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index2~0#1| 4) (* (+ c_~ARR_SIZE~0 (* |ULTIMATE.start_main_~index2~0#1| (- 1))) .cse14)) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|)))) (+ (select .cse13 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| 4)) 2 (select .cse13 (+ .cse14 |c_ULTIMATE.start_main_~#array~0#1.offset|)) (select .cse13 (+ .cse14 |c_ULTIMATE.start_main_~#array~0#1.offset| 4)) (select .cse13 |c_ULTIMATE.start_main_~#array~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|))) (* 2 c_~ARR_SIZE~0))) (forall ((|ULTIMATE.start_main_~index2~0#1| Int)) (<= (let ((.cse16 (* (mod c_~ARR_SIZE~0 4294967296) 4))) (let ((.cse15 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ (* (+ (- 2) c_~ARR_SIZE~0 (* |ULTIMATE.start_main_~index2~0#1| (- 1))) .cse16) |c_ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index2~0#1| 4)) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|)))) (+ (select .cse15 (+ .cse16 |c_ULTIMATE.start_main_~#array~0#1.offset| 4)) (select .cse15 |c_ULTIMATE.start_main_~#array~0#1.offset|) (select .cse15 (+ .cse16 |c_ULTIMATE.start_main_~#array~0#1.offset|)) 2 |c_ULTIMATE.start_main_~sum~0#1| (select .cse15 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| 4))))) (* 2 c_~ARR_SIZE~0))))))) is different from true [2021-11-21 00:38:24,305 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:24,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554874903] [2021-11-21 00:38:24,305 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:38:24,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550785850] [2021-11-21 00:38:24,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550785850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:38:24,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1041126356] [2021-11-21 00:38:24,308 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-21 00:38:24,308 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:38:24,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:38:24,309 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:38:24,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:38:24,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:24,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:24,655 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 00:38:24,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-21 00:38:24,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:24,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:38:24,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 48 treesize of output 54 [2021-11-21 00:38:24,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:24,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:24,930 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:38:24,931 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 [2021-11-21 00:38:25,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:25,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:25,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 84 [2021-11-21 00:38:25,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:25,455 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 21 [2021-11-21 00:38:26,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:26,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:26,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:26,354 INFO L354 Elim1Store]: treesize reduction 220, result has 20.6 percent of original size [2021-11-21 00:38:26,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 278 treesize of output 316 [2021-11-21 00:38:26,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:26,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:26,843 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-11-21 00:38:26,843 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 227 treesize of output 186 [2021-11-21 00:38:28,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:38:28,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:38:28,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:38:28,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:38:29,565 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 00:38:29,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 178 [2021-11-21 00:38:29,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:38:30,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:38:30,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 89 [2021-11-21 00:38:32,410 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 00:38:32,440 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:38:35,382 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:38:35,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:38:35,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-21 00:38:35,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819254487] [2021-11-21 00:38:35,383 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 00:38:35,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 00:38:35,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:35,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 00:38:35,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1858, Unknown=10, NotChecked=88, Total=2162 [2021-11-21 00:38:35,385 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:38:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:35,942 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2021-11-21 00:38:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 00:38:35,943 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-11-21 00:38:35,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:35,944 INFO L225 Difference]: With dead ends: 65 [2021-11-21 00:38:35,945 INFO L226 Difference]: Without dead ends: 62 [2021-11-21 00:38:35,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=222, Invalid=2028, Unknown=10, NotChecked=92, Total=2352 [2021-11-21 00:38:35,947 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:35,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 129 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 133 Invalid, 0 Unknown, 163 Unchecked, 0.4s Time] [2021-11-21 00:38:35,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-21 00:38:35,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-11-21 00:38:35,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:38:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-11-21 00:38:35,966 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 35 [2021-11-21 00:38:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:35,967 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-11-21 00:38:35,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:38:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-11-21 00:38:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:38:35,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:35,969 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:36,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:38:36,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:36,194 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:36,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:36,194 INFO L85 PathProgramCache]: Analyzing trace with hash -408457928, now seen corresponding path program 8 times [2021-11-21 00:38:36,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:36,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766719521] [2021-11-21 00:38:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:36,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:36,200 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:38:36,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331439235] [2021-11-21 00:38:36,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:38:36,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:36,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:38:36,204 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:38:36,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:38:36,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 00:38:36,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:38:36,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:38:36,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:38:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 00:38:36,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:38:36,960 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 00:38:36,960 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:36,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766719521] [2021-11-21 00:38:36,961 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:38:36,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331439235] [2021-11-21 00:38:36,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331439235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:38:36,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1051561954] [2021-11-21 00:38:36,963 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-21 00:38:36,964 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:38:36,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:38:36,964 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:38:36,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:38:37,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:37,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:37,309 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:38:37,309 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 [2021-11-21 00:38:37,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:37,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:37,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-21 00:38:37,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:37,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-11-21 00:38:38,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:38,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:38,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 96 [2021-11-21 00:38:38,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:38,092 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 40 treesize of output 14 [2021-11-21 00:38:38,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:38,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:38,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:38,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:38,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:38,980 INFO L354 Elim1Store]: treesize reduction 122, result has 10.9 percent of original size [2021-11-21 00:38:38,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 284 treesize of output 316 [2021-11-21 00:38:39,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:39,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:39,097 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 88 treesize of output 42 [2021-11-21 00:38:39,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:39,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:39,373 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 88 treesize of output 42 [2021-11-21 00:38:40,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:38:40,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:38:41,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:38:41,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:38:42,403 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 00:38:42,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 178 [2021-11-21 00:38:42,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:38:42,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 54 [2021-11-21 00:38:42,573 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 35 treesize of output 18 [2021-11-21 00:38:44,918 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 00:38:44,939 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:38:46,673 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:38:46,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:38:46,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-21 00:38:46,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560827875] [2021-11-21 00:38:46,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:38:46,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:38:46,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:46,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:38:46,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:38:46,676 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:38:47,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:47,319 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2021-11-21 00:38:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 00:38:47,327 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-11-21 00:38:47,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:47,328 INFO L225 Difference]: With dead ends: 120 [2021-11-21 00:38:47,328 INFO L226 Difference]: Without dead ends: 84 [2021-11-21 00:38:47,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=265, Invalid=1457, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 00:38:47,330 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:47,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 72 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:38:47,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-21 00:38:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2021-11-21 00:38:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:38:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2021-11-21 00:38:47,363 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 36 [2021-11-21 00:38:47,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:47,364 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2021-11-21 00:38:47,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:38:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2021-11-21 00:38:47,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 00:38:47,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:47,365 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:47,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:38:47,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:47,570 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:47,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:47,570 INFO L85 PathProgramCache]: Analyzing trace with hash 166871866, now seen corresponding path program 9 times [2021-11-21 00:38:47,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:47,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948723506] [2021-11-21 00:38:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:47,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:47,578 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:38:47,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978925549] [2021-11-21 00:38:47,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:38:47,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:47,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:38:47,580 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:38:47,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:38:47,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:38:47,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:38:47,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:38:47,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:38:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 37 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:38:47,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:38:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 00:38:47,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:47,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948723506] [2021-11-21 00:38:47,959 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:38:47,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978925549] [2021-11-21 00:38:47,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978925549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:38:47,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1216531232] [2021-11-21 00:38:47,962 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-21 00:38:47,962 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:38:47,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:38:47,963 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:38:47,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:38:48,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:48,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:48,267 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:38:48,268 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 [2021-11-21 00:38:48,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:48,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:48,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-21 00:38:48,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:48,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-11-21 00:38:48,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:48,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:48,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 96 [2021-11-21 00:38:48,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:48,982 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 47 treesize of output 17 [2021-11-21 00:38:49,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:49,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:49,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:49,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:49,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:49,719 INFO L354 Elim1Store]: treesize reduction 122, result has 10.9 percent of original size [2021-11-21 00:38:49,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 284 treesize of output 316 [2021-11-21 00:38:49,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:38:49,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:49,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:49,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:49,919 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-11-21 00:38:49,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 303 treesize of output 227 [2021-11-21 00:38:50,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:38:50,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:38:51,043 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:38:51,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:38:52,244 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 00:38:52,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 178 [2021-11-21 00:38:52,395 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 35 treesize of output 18 [2021-11-21 00:38:52,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:52,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 22 [2021-11-21 00:38:55,144 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 00:38:55,172 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:38:56,768 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:38:56,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:38:56,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-21 00:38:56,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872692553] [2021-11-21 00:38:56,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:38:56,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:38:56,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:56,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:38:56,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-11-21 00:38:56,770 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:38:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:57,047 INFO L93 Difference]: Finished difference Result 127 states and 158 transitions. [2021-11-21 00:38:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:38:57,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-11-21 00:38:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:57,050 INFO L225 Difference]: With dead ends: 127 [2021-11-21 00:38:57,050 INFO L226 Difference]: Without dead ends: 110 [2021-11-21 00:38:57,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2021-11-21 00:38:57,052 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:57,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 59 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:38:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-21 00:38:57,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2021-11-21 00:38:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 79 states have (on average 1.240506329113924) internal successors, (98), 79 states have internal predecessors, (98), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-21 00:38:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2021-11-21 00:38:57,074 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 39 [2021-11-21 00:38:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:57,074 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2021-11-21 00:38:57,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:38:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2021-11-21 00:38:57,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-21 00:38:57,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:57,076 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:57,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:38:57,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 00:38:57,298 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:57,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:57,298 INFO L85 PathProgramCache]: Analyzing trace with hash -618146796, now seen corresponding path program 10 times [2021-11-21 00:38:57,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:57,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469300061] [2021-11-21 00:38:57,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:57,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:57,304 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:38:57,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533413730] [2021-11-21 00:38:57,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:38:57,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:57,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:38:57,306 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:38:57,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:38:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:57,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:38:57,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:38:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 00:38:57,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:38:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 29 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 00:38:57,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:57,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469300061] [2021-11-21 00:38:57,590 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:38:57,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533413730] [2021-11-21 00:38:57,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533413730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:38:57,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1683410884] [2021-11-21 00:38:57,592 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-21 00:38:57,592 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:38:57,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:38:57,593 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:38:57,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:38:57,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:57,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:57,897 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 00:38:57,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-21 00:38:57,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-11-21 00:38:58,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:58,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:58,075 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:38:58,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2021-11-21 00:38:58,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-11-21 00:38:58,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:58,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:58,350 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:38:58,350 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 [2021-11-21 00:38:58,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:58,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:58,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-21 00:38:58,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:58,822 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 40 treesize of output 18 [2021-11-21 00:38:59,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:59,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:59,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:59,730 INFO L354 Elim1Store]: treesize reduction 224, result has 23.5 percent of original size [2021-11-21 00:38:59,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 328 [2021-11-21 00:39:00,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:00,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:00,379 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 24 [2021-11-21 00:39:00,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:00,653 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 21 [2021-11-21 00:39:02,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:39:02,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:39:02,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:39:02,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:39:03,352 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 00:39:03,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 178 [2021-11-21 00:39:03,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:39:03,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 98 [2021-11-21 00:39:06,026 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 00:39:06,045 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:39:07,573 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:39:07,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:39:07,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-21 00:39:07,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580435994] [2021-11-21 00:39:07,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:39:07,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:39:07,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:39:07,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:39:07,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-11-21 00:39:07,576 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:39:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:39:07,895 INFO L93 Difference]: Finished difference Result 189 states and 240 transitions. [2021-11-21 00:39:07,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:39:07,896 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2021-11-21 00:39:07,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:39:07,897 INFO L225 Difference]: With dead ends: 189 [2021-11-21 00:39:07,898 INFO L226 Difference]: Without dead ends: 140 [2021-11-21 00:39:07,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-11-21 00:39:07,899 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:39:07,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 96 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:39:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-21 00:39:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 118. [2021-11-21 00:39:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 100 states have (on average 1.23) internal successors, (123), 100 states have internal predecessors, (123), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-21 00:39:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 145 transitions. [2021-11-21 00:39:07,923 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 145 transitions. Word has length 40 [2021-11-21 00:39:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:39:07,923 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 145 transitions. [2021-11-21 00:39:07,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:39:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 145 transitions. [2021-11-21 00:39:07,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 00:39:07,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:39:07,925 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:39:07,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:39:08,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 00:39:08,130 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:39:08,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:39:08,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1565831899, now seen corresponding path program 1 times [2021-11-21 00:39:08,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:39:08,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575740512] [2021-11-21 00:39:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:08,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:39:08,136 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:39:08,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844180643] [2021-11-21 00:39:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:39:08,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:39:08,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:39:08,138 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:39:08,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 00:39:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:39:08,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-21 00:39:08,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:39:08,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 00:39:08,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 00:39:08,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:08,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:08,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 91 [2021-11-21 00:39:08,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:39:08,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:08,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 24 [2021-11-21 00:39:09,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:39:09,105 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 1 case distinctions, treesize of input 99 treesize of output 140 [2021-11-21 00:39:09,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,173 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 108 treesize of output 44 [2021-11-21 00:39:09,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:39:09,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 115 [2021-11-21 00:39:09,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:39:09,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 29 [2021-11-21 00:39:09,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:09,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:10,432 INFO L354 Elim1Store]: treesize reduction 692, result has 23.9 percent of original size [2021-11-21 00:39:10,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 207 treesize of output 358 [2021-11-21 00:39:10,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:10,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:10,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:10,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:10,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:10,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:10,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:10,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:10,581 INFO L354 Elim1Store]: treesize reduction 154, result has 8.3 percent of original size [2021-11-21 00:39:10,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 174 treesize of output 113 [2021-11-21 00:39:15,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:15,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:15,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:15,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:15,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:15,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:16,021 INFO L354 Elim1Store]: treesize reduction 1598, result has 13.6 percent of original size [2021-11-21 00:39:16,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 42 case distinctions, treesize of input 306 treesize of output 430 [2021-11-21 00:39:21,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:21,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:21,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:21,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:21,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:21,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:21,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:21,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:21,817 INFO L354 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2021-11-21 00:39:21,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 679 treesize of output 405 [2021-11-21 00:40:20,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:20,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:20,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:20,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:20,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:20,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:20,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:20,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:20,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:40:20,415 INFO L354 Elim1Store]: treesize reduction 503, result has 16.0 percent of original size [2021-11-21 00:40:20,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 461 treesize of output 261 [2021-11-21 00:41:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:41:08,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:35,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:35,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575740512] [2021-11-21 00:41:35,696 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:41:35,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844180643] [2021-11-21 00:41:35,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844180643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:41:35,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2143301947] [2021-11-21 00:41:35,698 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-21 00:41:35,699 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:41:35,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:41:35,699 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:41:35,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:41:36,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:36,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:36,868 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:41:36,868 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 [2021-11-21 00:41:37,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:37,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:37,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-21 00:41:37,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:37,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-11-21 00:41:38,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:38,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:41:38,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-21 00:41:38,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:41:38,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:38,383 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 43 treesize of output 17 [2021-11-21 00:41:39,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:41:39,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:39,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:41:40,272 INFO L354 Elim1Store]: treesize reduction 248, result has 19.7 percent of original size [2021-11-21 00:41:40,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 324 [2021-11-21 00:41:41,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:41:41,430 INFO L354 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2021-11-21 00:41:41,430 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 75 treesize of output 35 [2021-11-21 00:41:42,880 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:41:42,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:41:43,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:41:43,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:41:47,430 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 00:41:47,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 178 [2021-11-21 00:41:47,803 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-11-21 00:41:47,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 34 [2021-11-21 00:41:48,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:41:48,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 67 [2021-11-21 00:41:52,290 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 00:41:52,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 178 [2021-11-21 00:41:52,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:41:52,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 89 [2021-11-21 00:42:01,473 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 00:42:01,592 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:42:13,387 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:42:13,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:42:13,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-21 00:42:13,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122875913] [2021-11-21 00:42:13,388 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 00:42:13,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-21 00:42:13,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:13,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-21 00:42:13,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2769, Unknown=20, NotChecked=0, Total=3080 [2021-11-21 00:42:13,390 INFO L87 Difference]: Start difference. First operand 118 states and 145 transitions. Second operand has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 23 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:42:18,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:18,447 INFO L93 Difference]: Finished difference Result 147 states and 175 transitions. [2021-11-21 00:42:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-21 00:42:18,448 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 23 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-11-21 00:42:18,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:18,450 INFO L225 Difference]: With dead ends: 147 [2021-11-21 00:42:18,450 INFO L226 Difference]: Without dead ends: 134 [2021-11-21 00:42:18,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 75.3s TimeCoverageRelationStatistics Valid=312, Invalid=2973, Unknown=21, NotChecked=0, Total=3306 [2021-11-21 00:42:18,453 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 430 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:18,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 153 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 228 Invalid, 0 Unknown, 430 Unchecked, 1.7s Time] [2021-11-21 00:42:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-21 00:42:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2021-11-21 00:42:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 106 states have (on average 1.2169811320754718) internal successors, (129), 107 states have internal predecessors, (129), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-21 00:42:18,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 157 transitions. [2021-11-21 00:42:18,488 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 157 transitions. Word has length 44 [2021-11-21 00:42:18,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:18,488 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 157 transitions. [2021-11-21 00:42:18,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 23 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 00:42:18,489 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 157 transitions. [2021-11-21 00:42:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-21 00:42:18,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:18,490 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:18,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:18,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 00:42:18,698 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:42:18,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:18,698 INFO L85 PathProgramCache]: Analyzing trace with hash 302229251, now seen corresponding path program 11 times [2021-11-21 00:42:18,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:18,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885623705] [2021-11-21 00:42:18,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:18,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:18,704 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:42:18,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501829148] [2021-11-21 00:42:18,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:42:18,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:18,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:18,706 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:42:18,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 00:42:18,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-21 00:42:18,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:42:18,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:42:18,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-21 00:42:19,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-21 00:42:19,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:19,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885623705] [2021-11-21 00:42:19,749 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:42:19,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501829148] [2021-11-21 00:42:19,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501829148] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:42:19,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [913466289] [2021-11-21 00:42:19,752 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-21 00:42:19,752 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:42:19,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:42:19,753 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:42:19,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:42:20,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:20,865 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:42:20,866 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 [2021-11-21 00:42:21,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:21,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:21,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-21 00:42:21,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:21,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-11-21 00:42:22,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:22,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:22,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 92 [2021-11-21 00:42:22,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:22,469 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 10 [2021-11-21 00:42:23,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:23,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:23,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:23,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:23,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:23,814 INFO L354 Elim1Store]: treesize reduction 120, result has 11.1 percent of original size [2021-11-21 00:42:23,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 312 [2021-11-21 00:42:24,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:24,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:24,106 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 84 treesize of output 40 [2021-11-21 00:42:24,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:24,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:24,666 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 103 treesize of output 43 [2021-11-21 00:42:27,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:42:27,698 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:42:28,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:42:28,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:42:32,045 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 00:42:32,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 178 [2021-11-21 00:42:32,422 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 60 treesize of output 26 [2021-11-21 00:42:32,602 INFO L354 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2021-11-21 00:42:32,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 29 [2021-11-21 00:42:32,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 22 [2021-11-21 00:42:32,999 INFO L354 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2021-11-21 00:42:32,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 25 [2021-11-21 00:42:41,711 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 00:42:41,842 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:42:49,672 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:42:49,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:42:49,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-21 00:42:49,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093228399] [2021-11-21 00:42:49,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:42:49,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:42:49,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:49,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:42:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-11-21 00:42:49,675 INFO L87 Difference]: Start difference. First operand 129 states and 157 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:42:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:51,220 INFO L93 Difference]: Finished difference Result 164 states and 200 transitions. [2021-11-21 00:42:51,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:42:51,222 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-11-21 00:42:51,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:51,223 INFO L225 Difference]: With dead ends: 164 [2021-11-21 00:42:51,223 INFO L226 Difference]: Without dead ends: 91 [2021-11-21 00:42:51,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 00:42:51,225 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:51,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 81 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 00:42:51,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-21 00:42:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-11-21 00:42:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 72 states have internal predecessors, (84), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 00:42:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2021-11-21 00:42:51,252 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 43 [2021-11-21 00:42:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:51,253 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2021-11-21 00:42:51,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:42:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2021-11-21 00:42:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 00:42:51,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:51,254 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:51,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:51,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 00:42:51,482 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:42:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash -388484414, now seen corresponding path program 12 times [2021-11-21 00:42:51,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:51,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808882936] [2021-11-21 00:42:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:51,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:51,487 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:42:51,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51603325] [2021-11-21 00:42:51,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:42:51,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:51,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:51,492 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:42:51,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 00:42:51,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:42:51,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:42:51,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:42:51,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 61 proven. 24 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-21 00:42:52,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 57 proven. 24 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-21 00:42:53,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:53,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808882936] [2021-11-21 00:42:53,025 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:42:53,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51603325] [2021-11-21 00:42:53,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51603325] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:42:53,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794505692] [2021-11-21 00:42:53,028 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-21 00:42:53,028 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:42:53,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:42:53,029 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:42:53,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:42:53,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:53,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:54,312 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 00:42:54,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-21 00:42:54,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:54,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:42:54,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 48 treesize of output 54 [2021-11-21 00:42:55,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:55,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:55,227 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:42:55,227 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 [2021-11-21 00:42:56,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:56,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:56,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-21 00:42:56,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:56,593 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 47 treesize of output 21 [2021-11-21 00:42:58,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:58,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:42:58,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:42:58,713 INFO L354 Elim1Store]: treesize reduction 224, result has 23.5 percent of original size [2021-11-21 00:42:58,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 328 [2021-11-21 00:42:59,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:43:01,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:43:01,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:01,602 INFO L354 Elim1Store]: treesize reduction 60, result has 4.8 percent of original size [2021-11-21 00:43:01,602 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 291 treesize of output 232 [2021-11-21 00:43:03,183 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:43:03,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:43:03,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:43:03,908 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:43:07,636 INFO L354 Elim1Store]: treesize reduction 162, result has 27.4 percent of original size [2021-11-21 00:43:07,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 178 [2021-11-21 00:43:07,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:43:07,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:43:07,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 120 [2021-11-21 00:43:16,403 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 00:43:16,522 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:24,349 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:43:24,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:43:24,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-21 00:43:24,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839849625] [2021-11-21 00:43:24,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:24,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:43:24,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:24,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:43:24,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-11-21 00:43:24,352 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:43:26,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:26,537 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2021-11-21 00:43:26,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 00:43:26,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2021-11-21 00:43:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:26,540 INFO L225 Difference]: With dead ends: 125 [2021-11-21 00:43:26,540 INFO L226 Difference]: Without dead ends: 91 [2021-11-21 00:43:26,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=242, Invalid=1240, Unknown=0, NotChecked=0, Total=1482 [2021-11-21 00:43:26,542 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:26,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 80 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 00:43:26,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-21 00:43:26,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-11-21 00:43:26,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 72 states have internal predecessors, (82), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 00:43:26,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2021-11-21 00:43:26,566 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 47 [2021-11-21 00:43:26,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:26,567 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2021-11-21 00:43:26,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:43:26,567 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2021-11-21 00:43:26,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-21 00:43:26,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:26,568 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:26,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:26,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 00:43:26,768 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:26,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:26,769 INFO L85 PathProgramCache]: Analyzing trace with hash -351343146, now seen corresponding path program 2 times [2021-11-21 00:43:26,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:26,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547233408] [2021-11-21 00:43:26,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:26,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:26,774 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:43:26,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807469210] [2021-11-21 00:43:26,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:43:26,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:26,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:26,780 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:26,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cec000ef-1882-4117-865b-28c48ffbf65f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 00:43:30,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-21 00:43:30,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:43:30,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-21 00:43:30,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:43:30,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 00:43:30,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 00:43:31,249 INFO L354 Elim1Store]: treesize reduction 120, result has 20.5 percent of original size [2021-11-21 00:43:31,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 87 [2021-11-21 00:43:31,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:31,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-11-21 00:43:31,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:31,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 22 [2021-11-21 00:43:32,270 INFO L354 Elim1Store]: treesize reduction 323, result has 18.0 percent of original size [2021-11-21 00:43:32,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 136 [2021-11-21 00:43:32,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:32,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:32,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:32,382 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 70 treesize of output 25 [2021-11-21 00:43:32,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:32,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:32,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:32,611 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 90 treesize of output 28 [2021-11-21 00:43:33,473 INFO L354 Elim1Store]: treesize reduction 687, result has 16.4 percent of original size [2021-11-21 00:43:33,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 171 treesize of output 219 [2021-11-21 00:43:33,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:43:33,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:33,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:33,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:33,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:33,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:33,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:33,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:33,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:33,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:33,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 77 [2021-11-21 00:43:38,354 INFO L354 Elim1Store]: treesize reduction 785, result has 21.7 percent of original size [2021-11-21 00:43:38,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 207 treesize of output 358 [2021-11-21 00:43:42,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:42,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:42,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:42,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:42,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:42,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:42,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:42,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:43:43,081 INFO L354 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2021-11-21 00:43:43,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 158 treesize of output 107 [2021-11-21 00:44:15,744 INFO L354 Elim1Store]: treesize reduction 1651, result has 15.0 percent of original size [2021-11-21 00:44:15,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 42 case distinctions, treesize of input 305 treesize of output 480 [2021-11-21 00:44:19,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:19,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:19,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:19,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:19,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:19,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:19,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:19,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:44:19,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:19,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 253 treesize of output 128 [2021-11-21 00:44:20,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:20,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:20,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:20,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:20,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:20,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:20,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:20,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:44:20,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:20,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:20,466 INFO L244 Elim1Store]: Index analysis took 146 ms [2021-11-21 00:44:20,587 INFO L354 Elim1Store]: treesize reduction 197, result has 1.5 percent of original size [2021-11-21 00:44:20,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 299 treesize of output 153 [2021-11-21 00:44:21,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:21,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:21,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:21,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:44:21,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:21,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:21,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:21,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:21,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:44:21,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:22,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:22,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:22,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 136 [2021-11-21 00:44:23,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:23,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:23,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:23,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:23,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:23,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:23,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 125 [2021-11-21 00:44:24,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:24,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:24,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:24,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:24,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:24,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:24,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:24,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:44:24,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:24,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:44:24,394 INFO L354 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2021-11-21 00:44:24,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 281 treesize of output 147 [2021-11-21 00:48:17,631 INFO L354 Elim1Store]: treesize reduction 1266, result has 18.9 percent of original size [2021-11-21 00:48:17,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 536 treesize of output 574 [2021-11-21 00:48:23,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:23,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:23,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:23,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:23,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:23,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:23,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:23,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:23,739 INFO L244 Elim1Store]: Index analysis took 172 ms [2021-11-21 00:48:24,145 INFO L354 Elim1Store]: treesize reduction 176, result has 12.0 percent of original size [2021-11-21 00:48:24,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 195 treesize of output 112 [2021-11-21 00:48:24,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:24,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:24,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:24,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:24,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:24,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:24,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:24,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:24,783 INFO L244 Elim1Store]: Index analysis took 141 ms [2021-11-21 00:48:25,073 INFO L354 Elim1Store]: treesize reduction 193, result has 3.5 percent of original size [2021-11-21 00:48:25,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 238 treesize of output 116 [2021-11-21 00:48:25,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:25,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:25,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:25,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:25,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:25,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:26,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:26,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:26,084 INFO L244 Elim1Store]: Index analysis took 197 ms [2021-11-21 00:48:26,393 INFO L354 Elim1Store]: treesize reduction 178, result has 11.0 percent of original size [2021-11-21 00:48:26,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 209 treesize of output 113 [2021-11-21 00:48:27,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:27,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:27,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:27,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:27,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:27,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:27,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:27,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:27,291 INFO L244 Elim1Store]: Index analysis took 150 ms [2021-11-21 00:48:27,516 INFO L354 Elim1Store]: treesize reduction 193, result has 3.5 percent of original size [2021-11-21 00:48:27,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 209 treesize of output 98 [2021-11-21 00:48:30,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:30,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 78 [2021-11-21 00:48:30,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:30,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:30,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 78 [2021-11-21 00:48:31,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:48:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 96 [2021-11-21 00:48:31,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:48:31,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 75