./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array5_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_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/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_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array5_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/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_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/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 3dd3ea9d30e76cbd39a744e53feb2b89c359b5b85c7df24161ceaf060cda3b02 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:04:43,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:04:43,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:04:43,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:04:43,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:04:43,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:04:43,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:04:43,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:04:43,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:04:43,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:04:43,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:04:43,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:04:43,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:04:43,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:04:43,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:04:43,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:04:43,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:04:43,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:04:43,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:04:43,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:04:43,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:04:43,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:04:43,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:04:43,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:04:43,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:04:43,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:04:43,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:04:43,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:04:43,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:04:43,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:04:43,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:04:43,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:04:43,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:04:43,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:04:43,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:04:43,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:04:43,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:04:43,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:04:43,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:04:43,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:04:43,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:04:43,398 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:04:43,450 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:04:43,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:04:43,451 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:04:43,451 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:04:43,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:04:43,459 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:04:43,459 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:04:43,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:04:43,460 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:04:43,460 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:04:43,461 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:04:43,462 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:04:43,462 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:04:43,462 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:04:43,462 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:04:43,463 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:04:43,463 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:04:43,463 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:04:43,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:04:43,465 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:04:43,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:04:43,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:04:43,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:04:43,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:04:43,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:04:43,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:04:43,468 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:04:43,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:04:43,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:04:43,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:04:43,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:04:43,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:04:43,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:04:43,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:04:43,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:04:43,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:04:43,471 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:04:43,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:04:43,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:04:43,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:04:43,472 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:04:43,472 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_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3dd3ea9d30e76cbd39a744e53feb2b89c359b5b85c7df24161ceaf060cda3b02 [2021-11-21 01:04:43,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:04:43,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:04:43,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:04:43,781 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:04:43,782 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:04:43,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-patterns/array5_pattern.c [2021-11-21 01:04:43,862 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/data/1da014be9/e2739f096c294220ac5075272147c6ee/FLAG7353aa013 [2021-11-21 01:04:44,391 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:04:44,392 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/sv-benchmarks/c/array-patterns/array5_pattern.c [2021-11-21 01:04:44,402 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/data/1da014be9/e2739f096c294220ac5075272147c6ee/FLAG7353aa013 [2021-11-21 01:04:44,721 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/data/1da014be9/e2739f096c294220ac5075272147c6ee [2021-11-21 01:04:44,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:04:44,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:04:44,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:04:44,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:04:44,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:04:44,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:04:44" (1/1) ... [2021-11-21 01:04:44,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf1547f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:04:44, skipping insertion in model container [2021-11-21 01:04:44,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:04:44" (1/1) ... [2021-11-21 01:04:44,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:04:44,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:04:44,948 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_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/sv-benchmarks/c/array-patterns/array5_pattern.c[1890,1903] [2021-11-21 01:04:44,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:04:45,001 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:04:45,023 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_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/sv-benchmarks/c/array-patterns/array5_pattern.c[1890,1903] [2021-11-21 01:04:45,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:04:45,082 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:04:45,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:04:45 WrapperNode [2021-11-21 01:04:45,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:04:45,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:04:45,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:04:45,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:04:45,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:04:45" (1/1) ... [2021-11-21 01:04:45,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:04:45" (1/1) ... [2021-11-21 01:04:45,148 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2021-11-21 01:04:45,149 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:04:45,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:04:45,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:04:45,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:04:45,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:04:45" (1/1) ... [2021-11-21 01:04:45,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:04:45" (1/1) ... [2021-11-21 01:04:45,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:04:45" (1/1) ... [2021-11-21 01:04:45,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:04:45" (1/1) ... [2021-11-21 01:04:45,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:04:45" (1/1) ... [2021-11-21 01:04:45,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:04:45" (1/1) ... [2021-11-21 01:04:45,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:04:45" (1/1) ... [2021-11-21 01:04:45,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:04:45,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:04:45,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:04:45,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:04:45,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:04:45" (1/1) ... [2021-11-21 01:04:45,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:04:45,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:04:45,258 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:04:45,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:04:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:04:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:04:45,324 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:04:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:04:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:04:45,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:04:45,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:04:45,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:04:45,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:04:45,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:04:45,410 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:04:45,412 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:04:45,573 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:04:45,630 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:04:45,635 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:04:45,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:04:45 BoogieIcfgContainer [2021-11-21 01:04:45,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:04:45,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:04:45,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:04:45,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:04:45,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:04:44" (1/3) ... [2021-11-21 01:04:45,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78338f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:04:45, skipping insertion in model container [2021-11-21 01:04:45,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:04:45" (2/3) ... [2021-11-21 01:04:45,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78338f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:04:45, skipping insertion in model container [2021-11-21 01:04:45,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:04:45" (3/3) ... [2021-11-21 01:04:45,651 INFO L111 eAbstractionObserver]: Analyzing ICFG array5_pattern.c [2021-11-21 01:04:45,666 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:04:45,666 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:04:45,746 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:04:45,755 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 01:04:45,755 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:04:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:04:45,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:04:45,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:45,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:45,785 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:45,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:45,792 INFO L85 PathProgramCache]: Analyzing trace with hash 959661797, now seen corresponding path program 1 times [2021-11-21 01:04:45,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:04:45,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582961372] [2021-11-21 01:04:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:45,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:04:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:46,010 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 01:04:46,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:04:46,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582961372] [2021-11-21 01:04:46,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582961372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:04:46,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:04:46,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:04:46,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699291523] [2021-11-21 01:04:46,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:04:46,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:04:46,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:04:46,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:04:46,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:04:46,050 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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 01:04:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:46,112 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-21 01:04:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:04:46,115 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 01:04:46,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:46,123 INFO L225 Difference]: With dead ends: 24 [2021-11-21 01:04:46,136 INFO L226 Difference]: Without dead ends: 15 [2021-11-21 01:04:46,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 01:04:46,144 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:46,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:04:46,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-21 01:04:46,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-21 01:04:46,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:04:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-11-21 01:04:46,199 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2021-11-21 01:04:46,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:46,201 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-11-21 01:04:46,201 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 01:04:46,202 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-11-21 01:04:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:04:46,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:46,203 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:46,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:04:46,204 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:46,205 INFO L85 PathProgramCache]: Analyzing trace with hash 156202947, now seen corresponding path program 1 times [2021-11-21 01:04:46,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:04:46,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10607607] [2021-11-21 01:04:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:46,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:04:46,231 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:04:46,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790164617] [2021-11-21 01:04:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:46,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:46,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:04:46,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:04:46,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:04:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:46,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:04:46,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:04:46,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:04:46,504 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:04:46,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10607607] [2021-11-21 01:04:46,505 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:04:46,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790164617] [2021-11-21 01:04:46,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790164617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:04:46,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:04:46,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:04:46,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824652546] [2021-11-21 01:04:46,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:04:46,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:04:46,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:04:46,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:04:46,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:04:46,510 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:04:46,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:46,582 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-11-21 01:04:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:04:46,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-21 01:04:46,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:46,587 INFO L225 Difference]: With dead ends: 19 [2021-11-21 01:04:46,594 INFO L226 Difference]: Without dead ends: 16 [2021-11-21 01:04:46,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 01:04:46,598 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:46,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 26 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:04:46,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-21 01:04:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-21 01:04:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:04:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-21 01:04:46,608 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 16 [2021-11-21 01:04:46,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:46,608 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-21 01:04:46,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:04:46,609 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-21 01:04:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:04:46,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:46,610 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:46,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:46,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-21 01:04:46,811 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:46,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:46,812 INFO L85 PathProgramCache]: Analyzing trace with hash 547086701, now seen corresponding path program 1 times [2021-11-21 01:04:46,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:04:46,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300730846] [2021-11-21 01:04:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:46,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:04:46,859 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:04:46,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881835375] [2021-11-21 01:04:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:46,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:46,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:04:46,874 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:04:46,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:04:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:46,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:04:46,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:04:47,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:04:47,020 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:04:47,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300730846] [2021-11-21 01:04:47,021 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:04:47,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881835375] [2021-11-21 01:04:47,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881835375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:04:47,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:04:47,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:04:47,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974142078] [2021-11-21 01:04:47,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:04:47,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:04:47,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:04:47,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:04:47,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:04:47,024 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:04:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:47,100 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-11-21 01:04:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:04:47,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-21 01:04:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:47,102 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:04:47,102 INFO L226 Difference]: Without dead ends: 17 [2021-11-21 01:04:47,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:04:47,104 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:47,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 38 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:04:47,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-21 01:04:47,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-21 01:04:47,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:04:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-21 01:04:47,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 17 [2021-11-21 01:04:47,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:47,112 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-21 01:04:47,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:04:47,112 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-21 01:04:47,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:04:47,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:47,114 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:47,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:47,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:47,333 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:47,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:47,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1616883104, now seen corresponding path program 1 times [2021-11-21 01:04:47,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:04:47,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556453158] [2021-11-21 01:04:47,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:47,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:04:47,387 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:04:47,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506975317] [2021-11-21 01:04:47,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:47,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:47,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:04:47,392 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:04:47,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:04:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:47,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:04:47,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:47,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-21 01:04:47,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 53 [2021-11-21 01:04:47,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 33 [2021-11-21 01:04:48,241 INFO L354 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2021-11-21 01:04:48,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 34 [2021-11-21 01:04:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:04:48,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:48,501 INFO L354 Elim1Store]: treesize reduction 78, result has 50.3 percent of original size [2021-11-21 01:04:48,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 127 treesize of output 115 [2021-11-21 01:04:48,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:04:48,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 142 [2021-11-21 01:04:51,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:04:51,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 198 [2021-11-21 01:04:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:04:54,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:04:54,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556453158] [2021-11-21 01:04:54,489 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:04:54,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506975317] [2021-11-21 01:04:54,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506975317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:54,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1481215552] [2021-11-21 01:04:54,511 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:04:54,512 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:04:54,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:04:54,523 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:04:54,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:04:54,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:54,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:54,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,059 INFO L354 Elim1Store]: treesize reduction 170, result has 28.9 percent of original size [2021-11-21 01:04:55,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 127 [2021-11-21 01:04:55,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,140 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-21 01:04:55,141 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 2 case distinctions, treesize of input 35 treesize of output 31 [2021-11-21 01:04:55,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-11-21 01:04:55,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-11-21 01:04:55,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 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 01:04:55,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,436 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:04:55,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-11-21 01:04:55,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,543 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-21 01:04:55,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 40 treesize of output 34 [2021-11-21 01:04:55,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 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 01:04:55,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,867 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:04:55,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 01:04:55,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:55,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-21 01:04:56,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:56,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:56,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:56,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:56,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:56,357 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 01:04:56,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 316 treesize of output 314 [2021-11-21 01:04:57,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:57,155 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:04:57,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:04:57,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:57,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:57,889 INFO L354 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2021-11-21 01:04:57,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2021-11-21 01:04:57,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:57,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:57,970 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-11-21 01:04:57,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-11-21 01:05:00,142 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:05:00,168 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:05:01,781 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:05:01,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:05:01,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-11-21 01:05:01,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159289745] [2021-11-21 01:05:01,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:01,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 01:05:01,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:01,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 01:05:01,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:05:01,786 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 19 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:05:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:02,207 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-11-21 01:05:02,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:05:02,208 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2021-11-21 01:05:02,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:02,210 INFO L225 Difference]: With dead ends: 38 [2021-11-21 01:05:02,210 INFO L226 Difference]: Without dead ends: 35 [2021-11-21 01:05:02,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:05:02,212 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:02,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 133 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2021-11-21 01:05:02,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-21 01:05:02,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-11-21 01:05:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 01:05:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-11-21 01:05:02,223 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2021-11-21 01:05:02,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:02,223 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-11-21 01:05:02,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:05:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-11-21 01:05:02,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:05:02,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:02,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:02,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:02,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:02,425 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:02,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:02,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1416468688, now seen corresponding path program 2 times [2021-11-21 01:05:02,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:02,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561312479] [2021-11-21 01:05:02,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:02,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:02,443 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:05:02,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034681553] [2021-11-21 01:05:02,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:05:02,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:02,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:02,445 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:02,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:05:02,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:05:02,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:02,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:05:02,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:05:02,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:05:02,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:02,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561312479] [2021-11-21 01:05:02,647 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:05:02,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034681553] [2021-11-21 01:05:02,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034681553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:02,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1068645010] [2021-11-21 01:05:02,651 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:05:02,651 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:05:02,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:05:02,652 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:05:02,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:05:02,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:02,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:02,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:02,991 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:05:02,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 01:05:03,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:03,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:03,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:03,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 01:05:03,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:05:03,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:03,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:03,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 45 treesize of output 33 [2021-11-21 01:05:03,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:03,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:03,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-21 01:05:03,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:03,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:03,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:03,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:03,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:03,525 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 01:05:03,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 316 treesize of output 314 [2021-11-21 01:05:04,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:04,249 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:05:04,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:05:04,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:04,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:04,943 INFO L354 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2021-11-21 01:05:04,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2021-11-21 01:05:05,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:05,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:05,036 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-11-21 01:05:05,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-11-21 01:05:07,274 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:05:07,303 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:05:08,637 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:05:08,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:05:08,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-21 01:05:08,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522069562] [2021-11-21 01:05:08,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:08,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:05:08,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:08,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:05:08,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:05:08,639 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 01:05:08,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:08,780 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-11-21 01:05:08,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:05:08,782 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 01:05:08,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:08,783 INFO L225 Difference]: With dead ends: 54 [2021-11-21 01:05:08,783 INFO L226 Difference]: Without dead ends: 47 [2021-11-21 01:05:08,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:05:08,786 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:08,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 53 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:05:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-21 01:05:08,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-11-21 01:05:08,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 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 01:05:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-11-21 01:05:08,796 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 19 [2021-11-21 01:05:08,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:08,797 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-11-21 01:05:08,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 01:05:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-11-21 01:05:08,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:05:08,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:08,799 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:08,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:09,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:09,005 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:09,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:09,005 INFO L85 PathProgramCache]: Analyzing trace with hash 420833229, now seen corresponding path program 3 times [2021-11-21 01:05:09,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:09,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284360931] [2021-11-21 01:05:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:09,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:09,026 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:05:09,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032472963] [2021-11-21 01:05:09,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:05:09,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:09,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:09,028 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:09,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:05:09,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:05:09,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:09,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:05:09,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:05:09,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:05:09,222 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:09,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284360931] [2021-11-21 01:05:09,222 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:05:09,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032472963] [2021-11-21 01:05:09,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032472963] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:09,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [930559182] [2021-11-21 01:05:09,224 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:05:09,225 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:05:09,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:05:09,225 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:05:09,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:05:09,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:09,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:09,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:09,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:09,559 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:05:09,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 01:05:09,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:09,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:09,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:09,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 01:05:09,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:05:09,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:09,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:09,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 47 treesize of output 35 [2021-11-21 01:05:09,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:09,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:09,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 01:05:10,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:10,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:10,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:10,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:10,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:10,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:10,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:10,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:10,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:10,164 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 01:05:10,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 01:05:10,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:10,541 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:05:10,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:05:11,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:11,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:11,042 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-11-21 01:05:11,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-11-21 01:05:11,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:11,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:11,276 INFO L354 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2021-11-21 01:05:11,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2021-11-21 01:05:13,540 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:05:13,560 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:05:14,573 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:05:14,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:05:14,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-21 01:05:14,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378996937] [2021-11-21 01:05:14,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:14,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:05:14,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:14,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:05:14,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:05:14,576 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 01:05:14,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:14,703 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-11-21 01:05:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:05:14,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 01:05:14,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:14,704 INFO L225 Difference]: With dead ends: 49 [2021-11-21 01:05:14,704 INFO L226 Difference]: Without dead ends: 46 [2021-11-21 01:05:14,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:05:14,706 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:14,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 43 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:05:14,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-21 01:05:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-11-21 01:05:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-21 01:05:14,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-21 01:05:14,716 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 19 [2021-11-21 01:05:14,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:14,716 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-21 01:05:14,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 01:05:14,717 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-21 01:05:14,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:05:14,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:14,718 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:14,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:14,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:05:14,921 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:14,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:14,921 INFO L85 PathProgramCache]: Analyzing trace with hash 160690851, now seen corresponding path program 4 times [2021-11-21 01:05:14,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:14,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562693865] [2021-11-21 01:05:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:14,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:14,940 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:05:14,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725086419] [2021-11-21 01:05:14,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:05:14,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:14,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:14,942 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:14,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:05:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:15,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-21 01:05:15,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:15,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-21 01:05:15,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-21 01:05:15,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:15,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:15,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-21 01:05:15,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:15,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:15,679 INFO L354 Elim1Store]: treesize reduction 168, result has 40.2 percent of original size [2021-11-21 01:05:15,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 131 treesize of output 195 [2021-11-21 01:05:15,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:15,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:15,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:15,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:15,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:15,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 21 [2021-11-21 01:05:15,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:05:15,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:05:15,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:15,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:15,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:15,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:15,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2021-11-21 01:05:15,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:15,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:15,969 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 43 treesize of output 15 [2021-11-21 01:05:16,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:16,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:16,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:16,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:16,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 27 [2021-11-21 01:05:16,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:16,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:16,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:16,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 18 [2021-11-21 01:05:16,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:16,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:16,143 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 39 treesize of output 15 [2021-11-21 01:05:16,735 INFO L354 Elim1Store]: treesize reduction 76, result has 37.2 percent of original size [2021-11-21 01:05:16,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 89 [2021-11-21 01:05:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:05:16,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:24,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:24,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562693865] [2021-11-21 01:05:24,307 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:05:24,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725086419] [2021-11-21 01:05:24,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725086419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:05:24,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1271456841] [2021-11-21 01:05:24,310 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:05:24,310 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:05:24,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:05:24,311 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:05:24,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:05:24,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:24,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:24,754 INFO L354 Elim1Store]: treesize reduction 170, result has 28.9 percent of original size [2021-11-21 01:05:24,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 127 [2021-11-21 01:05:25,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:05:25,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:05:25,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:05:25,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:25,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:25,743 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-11-21 01:05:25,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 287 treesize of output 295 [2021-11-21 01:05:26,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,101 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:05:26,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 01:05:26,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 01:05:26,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:26,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:26,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:26,572 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 01:05:26,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 01:05:27,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:27,028 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:05:27,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:05:27,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:27,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:27,529 INFO L354 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2021-11-21 01:05:27,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2021-11-21 01:05:27,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:27,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:27,609 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-11-21 01:05:27,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-11-21 01:05:29,591 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:05:29,617 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:05:31,676 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:05:31,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:05:31,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-21 01:05:31,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396901754] [2021-11-21 01:05:31,677 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:31,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:05:31,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:31,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:05:31,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=874, Unknown=1, NotChecked=0, Total=992 [2021-11-21 01:05:31,690 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:05:32,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:32,178 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-11-21 01:05:32,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:05:32,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-11-21 01:05:32,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:32,181 INFO L225 Difference]: With dead ends: 62 [2021-11-21 01:05:32,182 INFO L226 Difference]: Without dead ends: 59 [2021-11-21 01:05:32,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=121, Invalid=934, Unknown=1, NotChecked=0, Total=1056 [2021-11-21 01:05:32,183 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:32,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 131 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 86 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2021-11-21 01:05:32,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-21 01:05:32,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2021-11-21 01:05:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:05:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-11-21 01:05:32,206 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 20 [2021-11-21 01:05:32,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:32,206 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-11-21 01:05:32,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:05:32,207 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-11-21 01:05:32,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:05:32,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:32,208 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:32,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:32,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:32,429 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:32,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:32,429 INFO L85 PathProgramCache]: Analyzing trace with hash 686211725, now seen corresponding path program 5 times [2021-11-21 01:05:32,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:32,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715791586] [2021-11-21 01:05:32,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:32,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:32,443 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:05:32,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790907294] [2021-11-21 01:05:32,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:05:32,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:32,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:32,445 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:32,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:05:32,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:05:32,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:32,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:05:32,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:05:32,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:05:32,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:32,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715791586] [2021-11-21 01:05:32,701 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:05:32,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790907294] [2021-11-21 01:05:32,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790907294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:32,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1128398400] [2021-11-21 01:05:32,704 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:05:32,704 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:05:32,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:05:32,705 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:05:32,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:05:32,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:32,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:32,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,009 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:05:33,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 01:05:33,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 01:05:33,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:05:33,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 54 treesize of output 40 [2021-11-21 01:05:33,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 01:05:33,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:33,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:33,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:33,545 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 01:05:33,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 01:05:33,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:33,950 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:05:33,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:05:34,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:34,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:34,363 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-11-21 01:05:34,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-11-21 01:05:34,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:34,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:34,560 INFO L354 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2021-11-21 01:05:34,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2021-11-21 01:05:36,592 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:05:36,612 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:05:37,937 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:05:37,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:05:37,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-21 01:05:37,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227880733] [2021-11-21 01:05:37,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:37,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:05:37,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:37,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:05:37,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:05:37,939 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 01:05:38,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:38,255 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-11-21 01:05:38,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:05:38,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 21 [2021-11-21 01:05:38,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:38,257 INFO L225 Difference]: With dead ends: 94 [2021-11-21 01:05:38,257 INFO L226 Difference]: Without dead ends: 86 [2021-11-21 01:05:38,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-11-21 01:05:38,259 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:38,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 95 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:05:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-21 01:05:38,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 55. [2021-11-21 01:05:38,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 01:05:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-11-21 01:05:38,273 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 21 [2021-11-21 01:05:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:38,273 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-11-21 01:05:38,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 01:05:38,274 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-11-21 01:05:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:05:38,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:38,275 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:38,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:38,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 01:05:38,501 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:38,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:38,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1807996304, now seen corresponding path program 6 times [2021-11-21 01:05:38,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:38,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552020197] [2021-11-21 01:05:38,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:38,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:38,514 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:05:38,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719357400] [2021-11-21 01:05:38,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:05:38,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:38,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:38,516 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:38,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:05:38,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:05:38,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:38,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:05:38,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:05:38,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:05:38,720 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:38,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552020197] [2021-11-21 01:05:38,720 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:05:38,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719357400] [2021-11-21 01:05:38,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719357400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:38,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2050524340] [2021-11-21 01:05:38,723 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:05:38,723 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:05:38,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:05:38,724 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:05:38,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:05:38,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:38,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:39,023 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:05:39,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 01:05:39,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:39,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:39,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:39,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 01:05:39,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:39,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:39,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 38 treesize of output 28 [2021-11-21 01:05:39,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:39,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:39,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 01:05:39,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:39,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:39,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:39,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:39,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:39,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:39,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:39,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:39,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:39,584 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 01:05:39,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 01:05:40,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:40,037 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:05:40,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:05:40,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:40,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:40,453 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-11-21 01:05:40,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-11-21 01:05:40,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:40,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:40,650 INFO L354 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2021-11-21 01:05:40,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2021-11-21 01:05:42,539 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:05:42,559 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:05:43,781 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:05:43,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:05:43,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-21 01:05:43,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647079966] [2021-11-21 01:05:43,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:43,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:05:43,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:43,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:05:43,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:05:43,784 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 01:05:44,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:44,007 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-11-21 01:05:44,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:05:44,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 21 [2021-11-21 01:05:44,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:44,009 INFO L225 Difference]: With dead ends: 80 [2021-11-21 01:05:44,009 INFO L226 Difference]: Without dead ends: 77 [2021-11-21 01:05:44,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-11-21 01:05:44,011 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:44,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 86 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:05:44,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-21 01:05:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 56. [2021-11-21 01:05:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 01:05:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-11-21 01:05:44,023 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 21 [2021-11-21 01:05:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:44,024 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-11-21 01:05:44,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 01:05:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-11-21 01:05:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 01:05:44,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:44,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:44,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:44,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:44,249 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:44,249 INFO L85 PathProgramCache]: Analyzing trace with hash 213073216, now seen corresponding path program 7 times [2021-11-21 01:05:44,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:44,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382585329] [2021-11-21 01:05:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:44,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:44,265 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:05:44,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461694999] [2021-11-21 01:05:44,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:05:44,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:44,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:44,267 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:44,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:05:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:44,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-21 01:05:44,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:44,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-21 01:05:44,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:05:44,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2021-11-21 01:05:44,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:44,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2021-11-21 01:05:45,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,210 INFO L354 Elim1Store]: treesize reduction 264, result has 39.6 percent of original size [2021-11-21 01:05:45,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 149 treesize of output 261 [2021-11-21 01:05:45,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:05:45,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,382 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 0 case distinctions, treesize of input 57 treesize of output 21 [2021-11-21 01:05:45,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:05:45,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,610 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 0 case distinctions, treesize of input 61 treesize of output 21 [2021-11-21 01:05:45,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:05:45,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:45,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:05:45,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 45 [2021-11-21 01:05:45,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:45,772 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 0 case distinctions, treesize of input 57 treesize of output 21 [2021-11-21 01:05:45,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:05:45,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:05:47,301 INFO L354 Elim1Store]: treesize reduction 112, result has 36.7 percent of original size [2021-11-21 01:05:47,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 188 treesize of output 144 [2021-11-21 01:05:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:05:47,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:59,370 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382585329] [2021-11-21 01:05:59,370 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:05:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461694999] [2021-11-21 01:05:59,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461694999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:05:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [901202492] [2021-11-21 01:05:59,372 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:05:59,373 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:05:59,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:05:59,373 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:05:59,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:05:59,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:59,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:59,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:59,771 INFO L354 Elim1Store]: treesize reduction 170, result has 28.9 percent of original size [2021-11-21 01:05:59,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 127 [2021-11-21 01:05:59,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:59,829 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-21 01:05:59,829 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 2 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 01:05:59,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-11-21 01:05:59,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:59,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:59,940 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:05:59,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2021-11-21 01:05:59,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:59,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,002 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:06:00,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 01:06:00,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,082 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-21 01:06:00,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 38 treesize of output 32 [2021-11-21 01:06:00,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,166 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:06:00,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-21 01:06:00,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-11-21 01:06:00,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,391 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:06:00,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 01:06:00,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 01:06:00,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:00,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:00,732 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 01:06:00,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 01:06:01,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:01,305 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:06:01,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:06:01,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:01,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:01,825 INFO L354 Elim1Store]: treesize reduction 34, result has 49.3 percent of original size [2021-11-21 01:06:01,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 80 [2021-11-21 01:06:01,868 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 13 treesize of output 5 [2021-11-21 01:06:01,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:01,915 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 25 treesize of output 9 [2021-11-21 01:06:02,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:02,087 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-11-21 01:06:02,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:02,115 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 25 treesize of output 9 [2021-11-21 01:06:02,302 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:02,324 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 11 treesize of output 3 [2021-11-21 01:06:04,640 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:06:04,663 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:06:07,051 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:06:07,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:06:07,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-21 01:06:07,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111403435] [2021-11-21 01:06:07,052 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 01:06:07,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:06:07,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:06:07,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:06:07,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1056, Unknown=2, NotChecked=0, Total=1190 [2021-11-21 01:06:07,053 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:06:07,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:07,284 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2021-11-21 01:06:07,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:06:07,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-11-21 01:06:07,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:07,286 INFO L225 Difference]: With dead ends: 75 [2021-11-21 01:06:07,286 INFO L226 Difference]: Without dead ends: 72 [2021-11-21 01:06:07,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=136, Invalid=1122, Unknown=2, NotChecked=0, Total=1260 [2021-11-21 01:06:07,287 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:07,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 106 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2021-11-21 01:06:07,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-21 01:06:07,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2021-11-21 01:06:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-21 01:06:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2021-11-21 01:06:07,302 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 22 [2021-11-21 01:06:07,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:07,303 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2021-11-21 01:06:07,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:06:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2021-11-21 01:06:07,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 01:06:07,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:07,305 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:06:07,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-21 01:06:07,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:07,513 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:07,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:07,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1984902256, now seen corresponding path program 8 times [2021-11-21 01:06:07,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:06:07,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692535297] [2021-11-21 01:06:07,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:07,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:06:07,546 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:06:07,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053373761] [2021-11-21 01:06:07,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:06:07,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:07,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:06:07,550 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:06:07,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:06:07,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:06:07,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:06:07,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:06:07,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:06:07,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:06:07,818 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:06:07,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692535297] [2021-11-21 01:06:07,818 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:06:07,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053373761] [2021-11-21 01:06:07,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053373761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:07,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [951219702] [2021-11-21 01:06:07,820 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:06:07,820 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:06:07,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:06:07,821 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:06:07,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:06:08,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:08,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:08,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:08,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:08,106 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:06:08,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 01:06:08,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:08,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:08,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:08,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 01:06:08,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:08,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:08,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 40 treesize of output 30 [2021-11-21 01:06:08,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:08,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:08,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-21 01:06:08,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:08,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:08,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:08,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:08,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:08,544 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 01:06:08,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 316 treesize of output 314 [2021-11-21 01:06:09,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:09,247 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:06:09,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:06:09,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:09,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:09,782 INFO L354 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2021-11-21 01:06:09,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2021-11-21 01:06:09,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:09,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:09,927 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-11-21 01:06:09,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-11-21 01:06:11,877 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:06:11,906 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:06:13,349 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:06:13,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:06:13,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-21 01:06:13,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996546935] [2021-11-21 01:06:13,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:06:13,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 01:06:13,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:06:13,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 01:06:13,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:06:13,352 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 01:06:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:13,726 INFO L93 Difference]: Finished difference Result 145 states and 171 transitions. [2021-11-21 01:06:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 01:06:13,727 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 01:06:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:13,729 INFO L225 Difference]: With dead ends: 145 [2021-11-21 01:06:13,729 INFO L226 Difference]: Without dead ends: 136 [2021-11-21 01:06:13,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:06:13,731 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 122 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:13,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 107 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:06:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-21 01:06:13,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 71. [2021-11-21 01:06:13,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.169811320754717) internal successors, (62), 53 states have internal predecessors, (62), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-21 01:06:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2021-11-21 01:06:13,751 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 23 [2021-11-21 01:06:13,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:13,751 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2021-11-21 01:06:13,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 01:06:13,752 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2021-11-21 01:06:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 01:06:13,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:13,753 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:06:13,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-21 01:06:13,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:13,973 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:13,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:13,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1569318675, now seen corresponding path program 9 times [2021-11-21 01:06:13,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:06:13,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621737919] [2021-11-21 01:06:13,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:13,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:06:13,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:06:13,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202004330] [2021-11-21 01:06:13,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:06:13,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:13,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:06:14,009 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:06:14,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:06:14,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:06:14,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:06:14,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:06:14,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:06:14,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:06:14,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:06:14,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621737919] [2021-11-21 01:06:14,280 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:06:14,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202004330] [2021-11-21 01:06:14,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202004330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:14,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1913617691] [2021-11-21 01:06:14,283 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:06:14,283 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:06:14,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:06:14,284 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:06:14,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:06:14,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:14,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:14,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:14,641 INFO L354 Elim1Store]: treesize reduction 170, result has 28.9 percent of original size [2021-11-21 01:06:14,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 127 [2021-11-21 01:06:14,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:14,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:14,726 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-11-21 01:06:14,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 76 [2021-11-21 01:06:14,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:14,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:14,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:14,963 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:06:14,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 01:06:15,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:15,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:15,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-21 01:06:15,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:15,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:15,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:15,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:15,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:15,425 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 01:06:15,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 316 treesize of output 314 [2021-11-21 01:06:16,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:16,180 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:06:16,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:06:16,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:16,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:16,714 INFO L354 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2021-11-21 01:06:16,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2021-11-21 01:06:16,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:16,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:16,823 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-11-21 01:06:16,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-11-21 01:06:18,944 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:06:18,973 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:06:20,391 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:06:20,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:06:20,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-21 01:06:20,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549555200] [2021-11-21 01:06:20,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:06:20,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 01:06:20,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:06:20,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 01:06:20,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:06:20,393 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 01:06:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:20,774 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-11-21 01:06:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 01:06:20,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 01:06:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:20,776 INFO L225 Difference]: With dead ends: 107 [2021-11-21 01:06:20,776 INFO L226 Difference]: Without dead ends: 104 [2021-11-21 01:06:20,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 01:06:20,778 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:20,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 101 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:06:20,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-21 01:06:20,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2021-11-21 01:06:20,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-21 01:06:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2021-11-21 01:06:20,813 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 23 [2021-11-21 01:06:20,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:20,813 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2021-11-21 01:06:20,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 01:06:20,814 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2021-11-21 01:06:20,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 01:06:20,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:20,822 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:06:20,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:21,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 01:06:21,037 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:21,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:21,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1404476029, now seen corresponding path program 10 times [2021-11-21 01:06:21,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:06:21,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694246694] [2021-11-21 01:06:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:21,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:06:21,055 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:06:21,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553828100] [2021-11-21 01:06:21,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:06:21,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:21,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:06:21,065 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:06:21,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 01:06:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:21,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-21 01:06:21,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:21,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-21 01:06:21,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-21 01:06:21,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-21 01:06:21,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 69 [2021-11-21 01:06:21,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2021-11-21 01:06:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,478 INFO L354 Elim1Store]: treesize reduction 360, result has 39.3 percent of original size [2021-11-21 01:06:22,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 164 treesize of output 324 [2021-11-21 01:06:22,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:22,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:06:22,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 4 case distinctions, treesize of input 135 treesize of output 127 [2021-11-21 01:06:22,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:23,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:23,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 27 [2021-11-21 01:06:23,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:23,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 27 [2021-11-21 01:06:23,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:23,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:23,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 33 [2021-11-21 01:06:28,688 INFO L354 Elim1Store]: treesize reduction 380, result has 33.2 percent of original size [2021-11-21 01:06:28,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 465 treesize of output 397 [2021-11-21 01:06:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:06:31,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:37,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:06:37,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694246694] [2021-11-21 01:06:37,449 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:06:37,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553828100] [2021-11-21 01:06:37,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553828100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:06:37,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [466832906] [2021-11-21 01:06:37,450 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:06:37,450 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:06:37,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:06:37,451 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:06:37,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:06:37,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:37,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:37,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:37,730 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:06:37,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 01:06:37,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:37,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:37,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:37,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 01:06:37,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:37,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:37,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 49 treesize of output 37 [2021-11-21 01:06:38,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:38,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:38,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 01:06:38,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:38,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:38,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:38,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:38,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:38,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:38,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:38,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:38,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:38,177 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 01:06:38,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 01:06:38,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:38,559 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:06:38,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:06:38,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:38,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:38,941 INFO L354 Elim1Store]: treesize reduction 34, result has 49.3 percent of original size [2021-11-21 01:06:38,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 80 [2021-11-21 01:06:39,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:39,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:06:39,015 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 29 treesize of output 21 [2021-11-21 01:06:39,161 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 13 treesize of output 5 [2021-11-21 01:06:39,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:39,255 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 25 treesize of output 9 [2021-11-21 01:06:41,550 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:06:41,569 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:06:44,143 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:06:44,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:06:44,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-21 01:06:44,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127551216] [2021-11-21 01:06:44,144 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 01:06:44,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 01:06:44,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:06:44,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 01:06:44,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 01:06:44,145 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:06:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:44,960 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2021-11-21 01:06:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 01:06:44,961 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-11-21 01:06:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:44,963 INFO L225 Difference]: With dead ends: 106 [2021-11-21 01:06:44,963 INFO L226 Difference]: Without dead ends: 103 [2021-11-21 01:06:44,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2021-11-21 01:06:44,964 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:44,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 189 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 207 Invalid, 0 Unknown, 207 Unchecked, 0.4s Time] [2021-11-21 01:06:44,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-21 01:06:44,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2021-11-21 01:06:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 60 states have internal predecessors, (70), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:06:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2021-11-21 01:06:44,982 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 24 [2021-11-21 01:06:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:44,983 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2021-11-21 01:06:44,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:06:44,983 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2021-11-21 01:06:44,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:06:44,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:44,984 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:06:45,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:45,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 01:06:45,198 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:45,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:45,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1395275775, now seen corresponding path program 1 times [2021-11-21 01:06:45,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:06:45,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603591761] [2021-11-21 01:06:45,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:45,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:06:45,208 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:06:45,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361130035] [2021-11-21 01:06:45,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:45,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:45,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:06:45,210 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:06:45,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 01:06:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:45,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-21 01:06:45,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:45,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-21 01:06:45,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:06:45,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:45,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:45,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-21 01:06:45,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:45,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:45,847 INFO L354 Elim1Store]: treesize reduction 176, result has 39.1 percent of original size [2021-11-21 01:06:45,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 137 treesize of output 199 [2021-11-21 01:06:45,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:45,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:45,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:45,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:45,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 21 [2021-11-21 01:06:45,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:46,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:46,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:46,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:46,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:46,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 18 [2021-11-21 01:06:46,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:46,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:46,145 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 39 treesize of output 15 [2021-11-21 01:06:46,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:46,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:46,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:46,261 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 43 treesize of output 15 [2021-11-21 01:06:46,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:47,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:47,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:47,801 INFO L354 Elim1Store]: treesize reduction 1134, result has 13.5 percent of original size [2021-11-21 01:06:47,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 188 treesize of output 262 [2021-11-21 01:06:48,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:48,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:48,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:48,508 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 45 treesize of output 17 [2021-11-21 01:06:48,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:48,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:48,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:48,743 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:48,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:48,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:48,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:48,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:48,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:48,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:48,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 23 [2021-11-21 01:06:48,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:48,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:48,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:48,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:48,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:48,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2021-11-21 01:06:48,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:48,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:48,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:48,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:48,949 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 43 treesize of output 15 [2021-11-21 01:06:49,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:49,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:49,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:49,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:49,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:06:49,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 29 [2021-11-21 01:06:49,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:49,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:49,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:49,269 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 41 treesize of output 17 [2021-11-21 01:06:49,311 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:49,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:49,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:49,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:49,397 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 39 treesize of output 15 [2021-11-21 01:06:49,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:49,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:06:50,710 INFO L354 Elim1Store]: treesize reduction 76, result has 37.2 percent of original size [2021-11-21 01:06:50,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 175 treesize of output 123 [2021-11-21 01:06:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:06:50,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:07:58,006 WARN L227 SmtUtils]: Spent 13.17s on a formula simplification that was a NOOP. DAG size: 183 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:08:03,775 WARN L838 $PredicateComparison]: unable to prove that (or (<= c_~ARR_SIZE~0 |c_ULTIMATE.start_main_~index~0#1|) (let ((.cse51 (= 200 |c_ULTIMATE.start_main_~count~0#1|))) (and (or (and (forall ((|aux_div_ULTIMATE.start_main_#t~nondet6#1_42| Int)) (let ((.cse24 (* 2 |aux_div_ULTIMATE.start_main_#t~nondet6#1_42|))) (or (let ((.cse15 (* |c_ULTIMATE.start_main_~count~0#1| |c_ULTIMATE.start_main_~num~0#1|)) (.cse22 (* |c_ULTIMATE.start_main_~index~0#1| 4)) (.cse6 (* (+ |c_ULTIMATE.start_main_~count~0#1| 1) |c_ULTIMATE.start_main_~num~0#1|)) (.cse23 (* |aux_div_ULTIMATE.start_main_#t~nondet6#1_42| 8))) (let ((.cse16 (= (mod |c_ULTIMATE.start_main_~index~0#1| 2) 0)) (.cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (.cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (.cse5 (+ .cse23 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) (.cse8 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse23)) (.cse9 (* |c_ULTIMATE.start_main_~num~0#1| .cse6)) (.cse11 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse22)) (.cse13 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse14 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse22)) (.cse12 (* |c_ULTIMATE.start_main_~num~0#1| .cse15))) (and (or (= (let ((.cse4 (let ((.cse7 (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse13 .cse14 .cse15)))) (store .cse10 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse10 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse11 .cse12))))) (store .cse7 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse7 |c_ULTIMATE.start_main_~#array1~0#1.base|) .cse8 .cse9))))) (let ((.cse2 (store (select .cse4 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse5 .cse6))) (let ((.cse0 (select (store .cse4 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse2) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 .cse1) (select .cse2 .cse3) (select .cse2 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)))) 0) .cse16) (or (not .cse16) (= (let ((.cse19 (let ((.cse20 (let ((.cse21 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse13 .cse14 .cse12)))) (store .cse21 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse21 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse11 .cse15))))) (store .cse20 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse20 |c_ULTIMATE.start_main_~#array1~0#1.base|) .cse8 .cse9))))) (let ((.cse17 (store (select .cse19 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse5 .cse6))) (let ((.cse18 (select (store .cse19 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse17) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse17 .cse3) (select .cse17 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse18 .cse1) (select .cse18 |c_ULTIMATE.start_main_~#array1~0#1.offset|))))) 0))))) (<= c_~ARR_SIZE~0 .cse24) (< .cse24 0)))) (forall ((|aux_div_ULTIMATE.start_main_#t~nondet6#1_42| Int) (|aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| Int)) (let ((.cse25 (+ (* 2 |aux_div_ULTIMATE.start_main_#t~nondet6#1_42|) |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42|))) (or (< .cse25 0) (<= c_~ARR_SIZE~0 .cse25) (let ((.cse39 (* |c_ULTIMATE.start_main_~count~0#1| |c_ULTIMATE.start_main_~num~0#1|)) (.cse48 (* |c_ULTIMATE.start_main_~index~0#1| 4)) (.cse36 (* (+ |c_ULTIMATE.start_main_~count~0#1| 1) |c_ULTIMATE.start_main_~num~0#1|)) (.cse49 (* |aux_div_ULTIMATE.start_main_#t~nondet6#1_42| 8)) (.cse50 (* |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 4))) (let ((.cse28 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (.cse30 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (.cse32 (+ .cse49 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse50)) (.cse33 (* |c_ULTIMATE.start_main_~num~0#1| .cse36)) (.cse35 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse49 .cse50)) (.cse38 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse48)) (.cse42 (* |c_ULTIMATE.start_main_~num~0#1| .cse39)) (.cse40 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse41 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse48)) (.cse26 (= (mod |c_ULTIMATE.start_main_~index~0#1| 2) 0))) (and (or (not .cse26) (= (let ((.cse31 (let ((.cse34 (let ((.cse37 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse40 .cse41 .cse42)))) (store .cse37 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse37 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse38 .cse39))))) (store .cse34 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse34 |c_ULTIMATE.start_main_~#array1~0#1.base|) .cse35 .cse36))))) (let ((.cse29 (store (select .cse31 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse32 .cse33))) (let ((.cse27 (select (store .cse31 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse29) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse27 .cse28) (select .cse27 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse29 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse29 .cse30) |c_ULTIMATE.start_main_~sum~0#1|)))) 0)) (or (= (let ((.cse45 (let ((.cse46 (let ((.cse47 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse40 .cse41 .cse39)))) (store .cse47 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse47 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse38 .cse42))))) (store .cse46 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse46 |c_ULTIMATE.start_main_~#array1~0#1.base|) .cse35 .cse36))))) (let ((.cse44 (store (select .cse45 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse32 .cse33))) (let ((.cse43 (select (store .cse45 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse44) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse43 .cse28) (select .cse43 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse44 .cse30) (select .cse44 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)))) 0) .cse26)))) (< |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 0) (= |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 0) (<= 2 |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42|))))) .cse51) (or (and (forall ((|aux_div_ULTIMATE.start_main_#t~nondet6#1_42| Int) (|aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| Int)) (let ((.cse52 (+ (* 2 |aux_div_ULTIMATE.start_main_#t~nondet6#1_42|) |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42|))) (or (< .cse52 0) (<= c_~ARR_SIZE~0 .cse52) (< |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 0) (let ((.cse67 (* |c_ULTIMATE.start_main_~count~0#1| |c_ULTIMATE.start_main_~num~0#1|)) (.cse74 (* |c_ULTIMATE.start_main_~index~0#1| 4)) (.cse75 (* |aux_div_ULTIMATE.start_main_#t~nondet6#1_42| 8)) (.cse76 (* |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 4))) (let ((.cse68 (= (mod |c_ULTIMATE.start_main_~index~0#1| 2) 0)) (.cse56 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (.cse54 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (.cse58 (+ .cse75 |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse76)) (.cse59 (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|)) (.cse61 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse75 .cse76)) (.cse63 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse74)) (.cse65 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse66 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse74)) (.cse64 (* |c_ULTIMATE.start_main_~num~0#1| .cse67))) (and (or (= (let ((.cse57 (let ((.cse60 (let ((.cse62 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse65 .cse66 .cse67)))) (store .cse62 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse62 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse63 .cse64))))) (store .cse60 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse60 |c_ULTIMATE.start_main_~#array1~0#1.base|) .cse61 |c_ULTIMATE.start_main_~num~0#1|))))) (let ((.cse55 (store (select .cse57 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse58 .cse59))) (let ((.cse53 (select (store .cse57 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse55) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse53 .cse54) (select .cse55 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse55 .cse56) |c_ULTIMATE.start_main_~sum~0#1| (select .cse53 |c_ULTIMATE.start_main_~#array1~0#1.offset|))))) 0) .cse68) (or (not .cse68) (= (let ((.cse71 (let ((.cse72 (let ((.cse73 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse65 .cse66 .cse64)))) (store .cse73 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse73 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse63 .cse67))))) (store .cse72 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse72 |c_ULTIMATE.start_main_~#array1~0#1.base|) .cse61 |c_ULTIMATE.start_main_~num~0#1|))))) (let ((.cse69 (store (select .cse71 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse58 .cse59))) (let ((.cse70 (select (store .cse71 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse69) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse69 .cse56) (select .cse70 .cse54) (select .cse70 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse69 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)))) 0))))) (= |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42| 0) (<= 2 |aux_mod_ULTIMATE.start_main_#t~nondet6#1_42|)))) (forall ((|aux_div_ULTIMATE.start_main_#t~nondet6#1_42| Int)) (let ((.cse100 (* 2 |aux_div_ULTIMATE.start_main_#t~nondet6#1_42|))) (or (let ((.cse88 (* |c_ULTIMATE.start_main_~count~0#1| |c_ULTIMATE.start_main_~num~0#1|)) (.cse98 (* |c_ULTIMATE.start_main_~index~0#1| 4)) (.cse99 (* |aux_div_ULTIMATE.start_main_#t~nondet6#1_42| 8))) (let ((.cse78 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (.cse80 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (.cse82 (+ .cse99 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) (.cse84 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse99)) (.cse85 (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|)) (.cse87 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse98)) (.cse91 (* |c_ULTIMATE.start_main_~num~0#1| .cse88)) (.cse89 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse90 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse98)) (.cse92 (= (mod |c_ULTIMATE.start_main_~index~0#1| 2) 0))) (and (or (= 0 (let ((.cse81 (let ((.cse83 (let ((.cse86 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse89 .cse90 .cse91)))) (store .cse86 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse86 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse87 .cse88))))) (store .cse83 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse83 |c_ULTIMATE.start_main_~#array1~0#1.base|) .cse84 .cse85))))) (let ((.cse79 (store (select .cse81 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse82 |c_ULTIMATE.start_main_~num~0#1|))) (let ((.cse77 (select (store .cse81 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse79) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse77 .cse78) (select .cse79 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse77 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse79 .cse80) |c_ULTIMATE.start_main_~sum~0#1|))))) (not .cse92)) (or (= (let ((.cse95 (let ((.cse96 (let ((.cse97 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse89 .cse90 .cse88)))) (store .cse97 |c_ULTIMATE.start_main_~#array2~0#1.base| (store (select .cse97 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse87 .cse91))))) (store .cse96 |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select .cse96 |c_ULTIMATE.start_main_~#array1~0#1.base|) .cse84 .cse85))))) (let ((.cse94 (store (select .cse95 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse82 |c_ULTIMATE.start_main_~num~0#1|))) (let ((.cse93 (select (store .cse95 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse94) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse93 .cse78) (select .cse94 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse93 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse94 .cse80))))) 0) .cse92)))) (<= c_~ARR_SIZE~0 .cse100) (< .cse100 0))))) (not .cse51)))) (< |c_ULTIMATE.start_main_~index~0#1| 0)) is different from false [2021-11-21 01:08:04,002 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:04,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603591761] [2021-11-21 01:08:04,003 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:08:04,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361130035] [2021-11-21 01:08:04,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361130035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:08:04,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1159194710] [2021-11-21 01:08:04,004 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:08:04,005 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:08:04,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:08:04,005 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:08:04,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:08:04,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,309 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:08:04,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 01:08:04,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 01:08:04,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 47 treesize of output 35 [2021-11-21 01:08:04,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 01:08:04,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:04,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:04,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:04,836 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 01:08:04,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 01:08:05,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:05,267 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:08:05,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:08:05,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:05,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:05,759 INFO L354 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2021-11-21 01:08:05,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-11-21 01:08:05,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:05,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:05,949 INFO L354 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2021-11-21 01:08:05,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2021-11-21 01:08:06,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:06,962 INFO L354 Elim1Store]: treesize reduction 39, result has 48.0 percent of original size [2021-11-21 01:08:06,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 105 [2021-11-21 01:08:07,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 01:08:07,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:07,251 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 29 treesize of output 13 [2021-11-21 01:08:07,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:07,682 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-11-21 01:08:07,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:07,874 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 28 treesize of output 12 [2021-11-21 01:08:08,190 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 13 treesize of output 5 [2021-11-21 01:08:08,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:08:11,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:11,468 INFO L354 Elim1Store]: treesize reduction 39, result has 48.0 percent of original size [2021-11-21 01:08:11,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 105 [2021-11-21 01:08:11,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 01:08:12,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:12,010 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 29 treesize of output 13 [2021-11-21 01:08:12,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:12,510 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-11-21 01:08:12,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:12,777 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 28 treesize of output 12 [2021-11-21 01:08:13,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:08:13,168 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 13 treesize of output 5 [2021-11-21 01:08:21,400 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:08:21,426 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:08:36,577 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:08:36,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:08:36,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-21 01:08:36,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578521646] [2021-11-21 01:08:36,578 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 01:08:36,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 01:08:36,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:36,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 01:08:36,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1310, Unknown=10, NotChecked=74, Total=1560 [2021-11-21 01:08:36,580 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand has 18 states, 16 states have (on average 1.25) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:08:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:39,090 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2021-11-21 01:08:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 01:08:39,091 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.25) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-11-21 01:08:39,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:39,092 INFO L225 Difference]: With dead ends: 97 [2021-11-21 01:08:39,092 INFO L226 Difference]: Without dead ends: 90 [2021-11-21 01:08:39,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 68.5s TimeCoverageRelationStatistics Valid=170, Invalid=1384, Unknown=10, NotChecked=76, Total=1640 [2021-11-21 01:08:39,093 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:39,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 173 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2021-11-21 01:08:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-21 01:08:39,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-11-21 01:08:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 11 states have call successors, (11), 10 states have call predecessors, (11), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-21 01:08:39,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2021-11-21 01:08:39,108 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 26 [2021-11-21 01:08:39,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:39,109 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2021-11-21 01:08:39,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.25) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:08:39,109 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2021-11-21 01:08:39,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 01:08:39,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:39,111 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:39,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:08:39,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:08:39,313 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:39,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:39,313 INFO L85 PathProgramCache]: Analyzing trace with hash -589321299, now seen corresponding path program 11 times [2021-11-21 01:08:39,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:39,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826630601] [2021-11-21 01:08:39,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:39,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:39,321 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:08:39,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903260418] [2021-11-21 01:08:39,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:08:39,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:08:39,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:08:39,345 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:08:39,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 01:08:39,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:08:39,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:08:39,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:08:39,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:08:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:39,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:08:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:08:39,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:39,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826630601] [2021-11-21 01:08:39,721 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:08:39,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903260418] [2021-11-21 01:08:39,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903260418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:08:39,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831867598] [2021-11-21 01:08:39,723 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:08:39,723 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:08:39,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:08:39,724 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:08:39,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:08:39,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:39,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:39,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,077 INFO L354 Elim1Store]: treesize reduction 170, result has 28.9 percent of original size [2021-11-21 01:08:40,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 127 [2021-11-21 01:08:40,122 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 28 treesize of output 22 [2021-11-21 01:08:40,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,150 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:08:40,151 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 33 treesize of output 25 [2021-11-21 01:08:40,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,268 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-11-21 01:08:40,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 55 [2021-11-21 01:08:40,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,358 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:08:40,359 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 33 treesize of output 29 [2021-11-21 01:08:40,410 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 28 treesize of output 22 [2021-11-21 01:08:40,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,589 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:08:40,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 01:08:40,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-21 01:08:40,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:40,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:40,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:40,932 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-21 01:08:40,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 323 treesize of output 309 [2021-11-21 01:08:41,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:41,288 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:08:41,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:08:41,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:41,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:41,743 INFO L354 Elim1Store]: treesize reduction 34, result has 49.3 percent of original size [2021-11-21 01:08:41,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 80 [2021-11-21 01:08:41,834 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 11 treesize of output 3 [2021-11-21 01:08:41,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:41,919 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 25 treesize of output 9 [2021-11-21 01:08:42,196 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 13 treesize of output 5 [2021-11-21 01:08:42,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:42,236 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 29 treesize of output 13 [2021-11-21 01:08:44,461 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:08:44,480 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:08:46,032 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:08:46,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:08:46,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-21 01:08:46,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769176389] [2021-11-21 01:08:46,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:08:46,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 01:08:46,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:46,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 01:08:46,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:08:46,034 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 01:08:46,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:46,694 INFO L93 Difference]: Finished difference Result 219 states and 258 transitions. [2021-11-21 01:08:46,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:08:46,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 25 [2021-11-21 01:08:46,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:46,697 INFO L225 Difference]: With dead ends: 219 [2021-11-21 01:08:46,697 INFO L226 Difference]: Without dead ends: 209 [2021-11-21 01:08:46,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=327, Invalid=1565, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 01:08:46,700 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 179 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:46,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 181 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:08:46,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-21 01:08:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 101. [2021-11-21 01:08:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.16) internal successors, (87), 75 states have internal predecessors, (87), 13 states have call successors, (13), 12 states have call predecessors, (13), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-21 01:08:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2021-11-21 01:08:46,727 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 25 [2021-11-21 01:08:46,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:46,728 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2021-11-21 01:08:46,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 01:08:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2021-11-21 01:08:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:08:46,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:46,729 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:46,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-21 01:08:46,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 01:08:46,949 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:46,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1145465632, now seen corresponding path program 12 times [2021-11-21 01:08:46,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:46,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303898014] [2021-11-21 01:08:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:46,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:46,960 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:08:46,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942361057] [2021-11-21 01:08:46,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:08:46,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:08:46,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:08:46,967 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:08:46,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 01:08:47,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:08:47,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:08:47,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-21 01:08:47,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:08:47,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-21 01:08:47,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:08:47,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2021-11-21 01:08:47,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2021-11-21 01:08:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 93 [2021-11-21 01:08:47,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:47,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 111 [2021-11-21 01:08:48,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,770 INFO L354 Elim1Store]: treesize reduction 456, result has 39.1 percent of original size [2021-11-21 01:08:48,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 20 case distinctions, treesize of input 185 treesize of output 393 [2021-11-21 01:08:48,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:48,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 33 [2021-11-21 01:08:48,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:08:49,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 33 [2021-11-21 01:08:49,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 33 [2021-11-21 01:08:49,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:08:49,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:49,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 33 [2021-11-21 01:08:50,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:50,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:08:50,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 81 [2021-11-21 01:08:50,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:08:50,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:08:50,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:08:50,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:08:50,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 33 [2021-11-21 01:08:55,485 INFO L354 Elim1Store]: treesize reduction 184, result has 36.3 percent of original size [2021-11-21 01:08:55,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 10 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 446 treesize of output 290 [2021-11-21 01:08:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:56,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:09:14,859 WARN L227 SmtUtils]: Spent 10.20s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:09:14,860 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:09:14,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303898014] [2021-11-21 01:09:14,860 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:09:14,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942361057] [2021-11-21 01:09:14,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942361057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:09:14,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [902474095] [2021-11-21 01:09:14,862 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-21 01:09:14,862 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:09:14,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:09:14,862 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:09:14,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:09:15,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:15,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:15,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:15,164 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-21 01:09:15,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-21 01:09:15,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:15,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:15,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:15,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2021-11-21 01:09:15,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:09:15,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:15,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:15,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 54 treesize of output 40 [2021-11-21 01:09:15,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:15,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:15,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-21 01:09:15,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:15,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:15,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:09:15,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:09:15,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:09:15,774 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-21 01:09:15,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 316 treesize of output 314 [2021-11-21 01:09:16,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:09:16,784 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 01:09:16,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:09:17,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:17,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:09:17,251 INFO L354 Elim1Store]: treesize reduction 34, result has 49.3 percent of original size [2021-11-21 01:09:17,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 80 [2021-11-21 01:09:17,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:09:17,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:09:17,317 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 29 treesize of output 21 [2021-11-21 01:09:17,423 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 11 treesize of output 3 [2021-11-21 01:09:17,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:17,541 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 25 treesize of output 9 [2021-11-21 01:09:19,808 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:09:19,836 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:09:23,274 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:09:23,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:09:23,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-21 01:09:23,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273430472] [2021-11-21 01:09:23,275 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 01:09:23,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 01:09:23,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:09:23,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 01:09:23,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1449, Unknown=2, NotChecked=0, Total=1640 [2021-11-21 01:09:23,283 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:09:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:09:24,013 INFO L93 Difference]: Finished difference Result 125 states and 140 transitions. [2021-11-21 01:09:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:09:24,014 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-21 01:09:24,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:09:24,015 INFO L225 Difference]: With dead ends: 125 [2021-11-21 01:09:24,015 INFO L226 Difference]: Without dead ends: 122 [2021-11-21 01:09:24,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=193, Invalid=1527, Unknown=2, NotChecked=0, Total=1722 [2021-11-21 01:09:24,017 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:09:24,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 171 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 151 Invalid, 0 Unknown, 236 Unchecked, 0.4s Time] [2021-11-21 01:09:24,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-21 01:09:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2021-11-21 01:09:24,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.170731707317073) internal successors, (96), 82 states have internal predecessors, (96), 14 states have call successors, (14), 13 states have call predecessors, (14), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-21 01:09:24,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2021-11-21 01:09:24,038 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 26 [2021-11-21 01:09:24,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:09:24,038 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2021-11-21 01:09:24,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:09:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2021-11-21 01:09:24,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 01:09:24,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:09:24,040 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:09:24,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-21 01:09:24,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 01:09:24,246 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:09:24,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:09:24,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1575120604, now seen corresponding path program 2 times [2021-11-21 01:09:24,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:09:24,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561030478] [2021-11-21 01:09:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:09:24,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:09:24,254 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:09:24,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290571433] [2021-11-21 01:09:24,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:09:24,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:09:24,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:09:24,274 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:09:24,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36e1f7d4-cc9b-4627-a876-ab122a1a33b5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 01:09:24,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:09:24,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:09:24,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-21 01:09:24,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:09:24,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-21 01:09:24,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2021-11-21 01:09:24,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:24,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:24,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-21 01:09:24,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:24,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:24,637 INFO L354 Elim1Store]: treesize reduction 108, result has 23.4 percent of original size [2021-11-21 01:09:24,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 75 [2021-11-21 01:09:28,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:28,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:28,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:28,700 INFO L354 Elim1Store]: treesize reduction 344, result has 35.5 percent of original size [2021-11-21 01:09:28,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 167 treesize of output 289 [2021-11-21 01:09:29,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,165 INFO L354 Elim1Store]: treesize reduction 64, result has 41.3 percent of original size [2021-11-21 01:09:29,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 119 treesize of output 111 [2021-11-21 01:09:29,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,394 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-11-21 01:09:29,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 29 [2021-11-21 01:09:29,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:09:29,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2021-11-21 01:09:29,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,545 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 39 treesize of output 15 [2021-11-21 01:09:29,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:09:29,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:09:29,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:29,957 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-11-21 01:09:29,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 35 [2021-11-21 01:09:30,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:09:30,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:09:30,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:09:30,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:30,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:30,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:30,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:30,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:30,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:30,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 24 [2021-11-21 01:09:31,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:09:31,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:31,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:31,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:31,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:31,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:31,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:31,313 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 0 case distinctions, treesize of input 57 treesize of output 21 [2021-11-21 01:09:31,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:09:49,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:49,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:49,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:09:49,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:12:19,523 WARN L227 SmtUtils]: Spent 2.50m on a formula simplification. DAG size of input: 4358 DAG size of output: 1045 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:12:19,527 INFO L354 Elim1Store]: treesize reduction 24068, result has 17.5 percent of original size [2021-11-21 01:12:19,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 58 select indices, 58 select index equivalence classes, 2 disjoint index pairs (out of 1653 index pairs), introduced 60 new quantified variables, introduced 1771 case distinctions, treesize of input 1111 treesize of output 5635