./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array18_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_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/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_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array18_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/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_3971b245-3471-4b0c-be8f-490abd14730c/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 4d58909a91b196e39d7623dd2e1e4d9b2698d6fa8ff06c2897eb5762e2e2e408 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:58:34,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:58:34,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:58:34,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:58:34,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:58:34,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:58:34,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:58:34,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:58:34,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:58:34,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:58:34,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:58:34,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:58:34,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:58:34,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:58:34,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:58:34,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:58:34,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:58:34,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:58:34,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:58:34,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:58:34,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:58:34,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:58:34,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:58:34,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:58:34,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:58:34,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:58:34,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:58:34,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:58:34,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:58:34,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:58:34,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:58:34,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:58:34,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:58:34,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:58:34,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:58:34,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:58:34,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:58:34,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:58:34,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:58:34,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:58:34,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:58:34,428 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:58:34,459 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:58:34,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:58:34,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:58:34,461 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:58:34,462 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:58:34,462 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:58:34,463 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:58:34,463 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:58:34,464 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:58:34,464 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:58:34,465 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:58:34,465 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:58:34,466 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:58:34,466 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:58:34,467 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:58:34,467 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:58:34,468 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:58:34,468 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:58:34,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:58:34,470 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:58:34,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:58:34,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:58:34,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:58:34,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:58:34,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:58:34,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:58:34,473 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:58:34,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:58:34,474 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:58:34,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:58:34,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:58:34,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:58:34,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:58:34,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:58:34,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:58:34,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:58:34,477 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:58:34,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:58:34,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:58:34,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:58:34,479 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:58:34,479 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_3971b245-3471-4b0c-be8f-490abd14730c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d58909a91b196e39d7623dd2e1e4d9b2698d6fa8ff06c2897eb5762e2e2e408 [2021-11-21 00:58:34,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:58:34,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:58:34,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:58:34,827 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:58:34,828 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:58:34,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-patterns/array18_pattern.c [2021-11-21 00:58:34,930 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/data/204e2ea27/208d6c245c3b47fba76c4ce5f20ea698/FLAGe6e7af5a9 [2021-11-21 00:58:35,447 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:58:35,451 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/sv-benchmarks/c/array-patterns/array18_pattern.c [2021-11-21 00:58:35,466 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/data/204e2ea27/208d6c245c3b47fba76c4ce5f20ea698/FLAGe6e7af5a9 [2021-11-21 00:58:35,787 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/data/204e2ea27/208d6c245c3b47fba76c4ce5f20ea698 [2021-11-21 00:58:35,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:58:35,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:58:35,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:58:35,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:58:35,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:58:35,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:58:35" (1/1) ... [2021-11-21 00:58:35,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44b53da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:35, skipping insertion in model container [2021-11-21 00:58:35,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:58:35" (1/1) ... [2021-11-21 00:58:35,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:58:35,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:58:36,067 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_3971b245-3471-4b0c-be8f-490abd14730c/sv-benchmarks/c/array-patterns/array18_pattern.c[1444,1457] [2021-11-21 00:58:36,091 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:58:36,100 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:58:36,115 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_3971b245-3471-4b0c-be8f-490abd14730c/sv-benchmarks/c/array-patterns/array18_pattern.c[1444,1457] [2021-11-21 00:58:36,131 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:58:36,147 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:58:36,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:36 WrapperNode [2021-11-21 00:58:36,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:58:36,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:58:36,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:58:36,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:58:36,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:36" (1/1) ... [2021-11-21 00:58:36,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:36" (1/1) ... [2021-11-21 00:58:36,211 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2021-11-21 00:58:36,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:58:36,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:58:36,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:58:36,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:58:36,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:36" (1/1) ... [2021-11-21 00:58:36,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:36" (1/1) ... [2021-11-21 00:58:36,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:36" (1/1) ... [2021-11-21 00:58:36,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:36" (1/1) ... [2021-11-21 00:58:36,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:36" (1/1) ... [2021-11-21 00:58:36,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:36" (1/1) ... [2021-11-21 00:58:36,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:36" (1/1) ... [2021-11-21 00:58:36,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:58:36,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:58:36,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:58:36,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:58:36,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:36" (1/1) ... [2021-11-21 00:58:36,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:58:36,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:58:36,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:58:36,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:58:36,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:58:36,365 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:58:36,365 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:58:36,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:58:36,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:58:36,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:58:36,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:58:36,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:58:36,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:58:36,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:58:36,441 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:58:36,443 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:58:36,677 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:58:36,764 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:58:36,764 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-21 00:58:36,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:58:36 BoogieIcfgContainer [2021-11-21 00:58:36,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:58:36,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:58:36,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:58:36,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:58:36,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:58:35" (1/3) ... [2021-11-21 00:58:36,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31851390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:58:36, skipping insertion in model container [2021-11-21 00:58:36,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:36" (2/3) ... [2021-11-21 00:58:36,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31851390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:58:36, skipping insertion in model container [2021-11-21 00:58:36,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:58:36" (3/3) ... [2021-11-21 00:58:36,779 INFO L111 eAbstractionObserver]: Analyzing ICFG array18_pattern.c [2021-11-21 00:58:36,785 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:58:36,786 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:58:36,845 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:58:36,854 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:58:36,855 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:58:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:58:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:58:36,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:36,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:58:36,901 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:58:36,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:36,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2071670553, now seen corresponding path program 1 times [2021-11-21 00:58:36,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:58:36,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393828462] [2021-11-21 00:58:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:36,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:58:37,045 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:58:37,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391880524] [2021-11-21 00:58:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:37,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:37,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:58:37,049 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:58:37,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:58:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:37,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 00:58:37,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:58:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:58:37,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:58:37,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:58:37,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393828462] [2021-11-21 00:58:37,193 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:58:37,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391880524] [2021-11-21 00:58:37,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391880524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:58:37,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:58:37,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:58:37,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122676416] [2021-11-21 00:58:37,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:58:37,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:58:37,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:58:37,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:58:37,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:58:37,237 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:58:37,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:58:37,282 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2021-11-21 00:58:37,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:58:37,285 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-21 00:58:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:58:37,294 INFO L225 Difference]: With dead ends: 28 [2021-11-21 00:58:37,294 INFO L226 Difference]: Without dead ends: 18 [2021-11-21 00:58:37,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:58:37,302 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:58:37,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:58:37,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-21 00:58:37,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-21 00:58:37,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:58:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-21 00:58:37,348 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2021-11-21 00:58:37,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:58:37,350 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-21 00:58:37,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:58:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-21 00:58:37,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 00:58:37,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:37,353 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:58:37,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:58:37,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 00:58:37,574 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:58:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash 916633033, now seen corresponding path program 1 times [2021-11-21 00:58:37,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:58:37,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248768029] [2021-11-21 00:58:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:37,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:58:37,587 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:58:37,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363763538] [2021-11-21 00:58:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:37,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:37,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:58:37,603 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:58:37,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:58:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:37,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:58:37,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:58:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:58:37,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:58:37,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:58:37,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248768029] [2021-11-21 00:58:37,866 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:58:37,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363763538] [2021-11-21 00:58:37,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363763538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:58:37,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:58:37,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:58:37,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854789890] [2021-11-21 00:58:37,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:58:37,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:58:37,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:58:37,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:58:37,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:58:37,872 INFO L87 Difference]: Start difference. First operand 18 states and 24 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:58:37,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:58:37,935 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2021-11-21 00:58:37,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:58:37,936 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2021-11-21 00:58:37,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:58:37,937 INFO L225 Difference]: With dead ends: 23 [2021-11-21 00:58:37,938 INFO L226 Difference]: Without dead ends: 20 [2021-11-21 00:58:37,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:58:37,940 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:58:37,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:58:37,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-21 00:58:37,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-21 00:58:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:58:37,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2021-11-21 00:58:37,950 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 19 [2021-11-21 00:58:37,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:58:37,951 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2021-11-21 00:58:37,952 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:58:37,952 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2021-11-21 00:58:37,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 00:58:37,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:37,954 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:58:37,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:58:38,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:38,180 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:58:38,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:38,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1792495404, now seen corresponding path program 1 times [2021-11-21 00:58:38,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:58:38,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128266038] [2021-11-21 00:58:38,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:38,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:58:38,200 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:58:38,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493941852] [2021-11-21 00:58:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:38,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:38,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:58:38,207 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:58:38,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:58:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:38,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:58:38,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:58:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:58:38,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:58:38,453 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:58:38,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128266038] [2021-11-21 00:58:38,453 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:58:38,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493941852] [2021-11-21 00:58:38,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493941852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:58:38,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:58:38,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:58:38,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357077558] [2021-11-21 00:58:38,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:58:38,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:58:38,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:58:38,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:58:38,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:58:38,456 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:58:38,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:58:38,691 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-11-21 00:58:38,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:58:38,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 22 [2021-11-21 00:58:38,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:58:38,693 INFO L225 Difference]: With dead ends: 41 [2021-11-21 00:58:38,693 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 00:58:38,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:58:38,696 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:58:38,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:58:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 00:58:38,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-11-21 00:58:38,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:58:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-11-21 00:58:38,705 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 22 [2021-11-21 00:58:38,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:58:38,706 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-11-21 00:58:38,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:58:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-11-21 00:58:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 00:58:38,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:38,708 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:58:38,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:58:38,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:38,923 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:58:38,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:38,924 INFO L85 PathProgramCache]: Analyzing trace with hash -957199016, now seen corresponding path program 1 times [2021-11-21 00:58:38,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:58:38,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454685609] [2021-11-21 00:58:38,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:38,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:58:38,937 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:58:38,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595664514] [2021-11-21 00:58:38,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:38,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:38,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:58:38,955 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:58:38,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:58:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:39,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:58:39,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:58:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:58:39,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:58:39,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:58:39,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454685609] [2021-11-21 00:58:39,099 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:58:39,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595664514] [2021-11-21 00:58:39,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595664514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:58:39,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:58:39,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:58:39,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016035900] [2021-11-21 00:58:39,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:58:39,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:58:39,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:58:39,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:58:39,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:58:39,103 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:58:39,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:58:39,154 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2021-11-21 00:58:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:58:39,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 24 [2021-11-21 00:58:39,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:58:39,156 INFO L225 Difference]: With dead ends: 40 [2021-11-21 00:58:39,156 INFO L226 Difference]: Without dead ends: 23 [2021-11-21 00:58:39,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:58:39,158 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:58:39,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:58:39,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-21 00:58:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-11-21 00:58:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:58:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-21 00:58:39,166 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 24 [2021-11-21 00:58:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:58:39,167 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-21 00:58:39,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:58:39,167 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-21 00:58:39,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 00:58:39,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:58:39,168 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:58:39,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:58:39,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:39,395 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:58:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:58:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash 566593900, now seen corresponding path program 1 times [2021-11-21 00:58:39,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:58:39,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586711021] [2021-11-21 00:58:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:39,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:58:39,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:58:39,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655993384] [2021-11-21 00:58:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:58:39,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:58:39,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:58:39,417 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:58:39,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:58:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:58:39,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-21 00:58:39,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:58:39,715 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:58:39,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:58:40,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 561 treesize of output 547 [2021-11-21 00:58:42,153 INFO L354 Elim1Store]: treesize reduction 5833, result has 3.4 percent of original size [2021-11-21 00:58:42,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 49 case distinctions, treesize of input 795 treesize of output 820 [2021-11-21 00:58:42,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:42,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:42,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:42,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 84 [2021-11-21 00:58:42,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:42,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:42,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:58:42,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 62 [2021-11-21 00:58:42,515 INFO L354 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2021-11-21 00:58:42,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 141 treesize of output 63 [2021-11-21 00:58:43,000 INFO L354 Elim1Store]: treesize reduction 23, result has 11.5 percent of original size [2021-11-21 00:58:43,000 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 68 treesize of output 41 [2021-11-21 00:58:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:58:43,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:18,920 WARN L227 SmtUtils]: Spent 16.62s 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 01:00:34,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:34,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586711021] [2021-11-21 01:00:34,756 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:00:34,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655993384] [2021-11-21 01:00:34,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655993384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:00:34,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1335691666] [2021-11-21 01:00:34,781 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-21 01:00:34,781 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:00:34,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:00:34,794 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:00:34,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:00:35,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:35,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:35,337 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 01:00:35,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-21 01:00:35,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:00:35,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:00:35,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:35,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:00:35,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 131 treesize of output 133 [2021-11-21 01:00:35,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:35,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:36,018 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:00:36,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:00:36,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:36,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:00:36,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 96 [2021-11-21 01:00:36,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:36,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 21 [2021-11-21 01:00:37,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:37,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:37,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:00:37,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:37,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:37,402 INFO L354 Elim1Store]: treesize reduction 122, result has 10.9 percent of original size [2021-11-21 01:00:37,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 284 treesize of output 316 [2021-11-21 01:00:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:37,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:37,584 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 102 treesize of output 42 [2021-11-21 01:00:37,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:37,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:37,917 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 81 treesize of output 39 [2021-11-21 01:00:39,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:00:39,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:00:39,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:00:39,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-21 01:00:41,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 544 treesize of output 532 [2021-11-21 01:00:41,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:41,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:41,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:41,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:41,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:41,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:41,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:41,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:41,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:41,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:41,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:42,850 INFO L354 Elim1Store]: treesize reduction 1557, result has 26.5 percent of original size [2021-11-21 01:00:42,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 622 treesize of output 1209 [2021-11-21 01:00:46,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:46,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:46,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:46,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:46,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:46,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:46,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:46,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:46,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:46,754 INFO L354 Elim1Store]: treesize reduction 180, result has 23.4 percent of original size [2021-11-21 01:00:46,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 760 treesize of output 602 [2021-11-21 01:00:48,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:48,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:48,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:48,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:48,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:48,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:48,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:48,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:48,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:48,797 INFO L354 Elim1Store]: treesize reduction 165, result has 29.8 percent of original size [2021-11-21 01:00:48,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 1303 treesize of output 1066 [2021-11-21 01:00:49,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,986 INFO L354 Elim1Store]: treesize reduction 138, result has 41.3 percent of original size [2021-11-21 01:00:49,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 1044 treesize of output 509 [2021-11-21 01:00:53,249 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2021-11-21 01:00:53,288 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:00:56,617 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:00:56,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:00:56,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-21 01:00:56,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069344562] [2021-11-21 01:00:56,618 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:56,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:00:56,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:56,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:00:56,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 01:00:56,622 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:00:56,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:56,963 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2021-11-21 01:00:56,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:00:56,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-11-21 01:00:56,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:56,967 INFO L225 Difference]: With dead ends: 46 [2021-11-21 01:00:56,968 INFO L226 Difference]: Without dead ends: 43 [2021-11-21 01:00:56,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-11-21 01:00:56,970 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:56,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 86 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2021-11-21 01:00:56,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-21 01:00:56,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-11-21 01:00:56,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 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 01:00:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-11-21 01:00:56,983 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 25 [2021-11-21 01:00:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:56,983 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-11-21 01:00:56,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:00:56,984 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-11-21 01:00:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:00:56,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:56,985 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:57,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 01:00:57,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:57,211 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:57,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:57,211 INFO L85 PathProgramCache]: Analyzing trace with hash 559534040, now seen corresponding path program 2 times [2021-11-21 01:00:57,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:57,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595019356] [2021-11-21 01:00:57,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:57,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:57,221 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:00:57,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347586323] [2021-11-21 01:00:57,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:00:57,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:57,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:57,239 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:57,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3971b245-3471-4b0c-be8f-490abd14730c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:00:57,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:00:57,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:00:57,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 01:00:57,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:57,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 482 treesize of output 474 [2021-11-21 01:03:29,707 WARN L227 SmtUtils]: Spent 2.53m on a formula simplification. DAG size of input: 189 DAG size of output: 110 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:03:29,709 INFO L354 Elim1Store]: treesize reduction 3143, result has 24.3 percent of original size [2021-11-21 01:03:29,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 22 case distinctions, treesize of input 722 treesize of output 1579 [2021-11-21 01:04:40,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:40,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:40,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:40,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:40,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:04:40,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:40,970 INFO L244 Elim1Store]: Index analysis took 800 ms [2021-11-21 01:04:42,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:04:42,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 800 treesize of output 750 [2021-11-21 01:05:05,201 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (let ((.cse0 (mod (+ 4294967295 ~ARR_SIZE~0 (* |ULTIMATE.start_main_~index1~0#1| 4294967295)) 4294967296)) (.cse1 (* (mod ~ARR_SIZE~0 4294967296) 4)) (.cse2 (* |ULTIMATE.start_main_~index2~0#1| 4))) (= (+ (* .cse0 .cse1) |ULTIMATE.start_main_~#array~0#1.offset| .cse2) (+ (* (+ .cse0 (- 4294967296)) .cse1) |ULTIMATE.start_main_~#array~0#1.offset| .cse2))) [2021-11-21 01:05:05,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:07,213 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (let ((.cse0 (mod (+ 4294967295 ~ARR_SIZE~0 (* |ULTIMATE.start_main_~index1~0#1| 4294967295)) 4294967296)) (.cse1 (* (mod ~ARR_SIZE~0 4294967296) 4)) (.cse2 (* |ULTIMATE.start_main_~index2~0#1| 4))) (= (+ (* .cse0 .cse1) |ULTIMATE.start_main_~#array~0#1.offset| .cse2) (+ (* (+ .cse0 (- 4294967296)) (+ (- 17179869184) .cse1)) |ULTIMATE.start_main_~#array~0#1.offset| .cse2))) [2021-11-21 01:05:09,217 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (let ((.cse0 (mod (+ 4294967295 ~ARR_SIZE~0 (* |ULTIMATE.start_main_~index1~0#1| 4294967295)) 4294967296)) (.cse1 (* (mod ~ARR_SIZE~0 4294967296) 4)) (.cse2 (* |ULTIMATE.start_main_~index2~0#1| 4))) (= (+ (* .cse0 .cse1) |ULTIMATE.start_main_~#array~0#1.offset| .cse2) (+ (* (+ .cse0 (- 4294967296)) (+ (- 17179869184) .cse1)) |ULTIMATE.start_main_~#array~0#1.offset| .cse2))) [2021-11-21 01:05:11,223 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (let ((.cse0 (* (mod ~ARR_SIZE~0 4294967296) 4)) (.cse1 (* |ULTIMATE.start_main_~index2~0#1| 4))) (= (+ (* (mod (+ 4294967295 ~ARR_SIZE~0 (* |ULTIMATE.start_main_~index1~0#1| 4294967295)) 4294967296) .cse0) |ULTIMATE.start_main_~#array~0#1.offset| .cse1) (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index1~0#1| .cse0) .cse1))) [2021-11-21 01:05:11,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:13,229 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (let ((.cse0 (mod (+ 4294967295 ~ARR_SIZE~0 (* |ULTIMATE.start_main_~index1~0#1| 4294967295)) 4294967296)) (.cse1 (* (mod ~ARR_SIZE~0 4294967296) 4)) (.cse2 (* |ULTIMATE.start_main_~index2~0#1| 4))) (= (+ (* .cse0 (+ (- 17179869184) .cse1)) |ULTIMATE.start_main_~#array~0#1.offset| .cse2) (+ (* .cse0 .cse1) |ULTIMATE.start_main_~#array~0#1.offset| .cse2))) [2021-11-21 01:05:15,232 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (let ((.cse0 (mod (+ 4294967295 ~ARR_SIZE~0 (* |ULTIMATE.start_main_~index1~0#1| 4294967295)) 4294967296)) (.cse1 (* (mod ~ARR_SIZE~0 4294967296) 4)) (.cse2 (* |ULTIMATE.start_main_~index2~0#1| 4))) (= (+ (* .cse0 (+ (- 17179869184) .cse1)) |ULTIMATE.start_main_~#array~0#1.offset| .cse2) (+ (* .cse0 .cse1) |ULTIMATE.start_main_~#array~0#1.offset| .cse2))) [2021-11-21 01:05:17,241 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (let ((.cse0 (+ (mod (+ 4294967295 ~ARR_SIZE~0 (* |ULTIMATE.start_main_~index1~0#1| 4294967295)) 4294967296) (- 4294967296))) (.cse1 (* (mod ~ARR_SIZE~0 4294967296) 4)) (.cse2 (* |ULTIMATE.start_main_~index2~0#1| 4))) (= (+ (* .cse0 .cse1) |ULTIMATE.start_main_~#array~0#1.offset| .cse2) (+ (* .cse0 (+ (- 17179869184) .cse1)) |ULTIMATE.start_main_~#array~0#1.offset| .cse2))) [2021-11-21 01:05:17,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:19,247 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (let ((.cse0 (* (mod ~ARR_SIZE~0 4294967296) 4)) (.cse1 (* |ULTIMATE.start_main_~index2~0#1| 4))) (= (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index1~0#1| .cse0) .cse1) (+ (* (+ (mod (+ 4294967295 ~ARR_SIZE~0 (* |ULTIMATE.start_main_~index1~0#1| 4294967295)) 4294967296) (- 4294967296)) .cse0) |ULTIMATE.start_main_~#array~0#1.offset| .cse1))) [2021-11-21 01:05:19,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:21,253 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (let ((.cse0 (mod (+ 4294967295 ~ARR_SIZE~0 (* |ULTIMATE.start_main_~index1~0#1| 4294967295)) 4294967296)) (.cse1 (* (mod ~ARR_SIZE~0 4294967296) 4)) (.cse2 (* |ULTIMATE.start_main_~index2~0#1| 4))) (= (+ (* .cse0 (+ (- 17179869184) .cse1)) |ULTIMATE.start_main_~#array~0#1.offset| .cse2) (+ (* (+ .cse0 (- 4294967296)) .cse1) |ULTIMATE.start_main_~#array~0#1.offset| .cse2))) [2021-11-21 01:05:21,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:23,261 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (let ((.cse0 (* (mod ~ARR_SIZE~0 4294967296) 4)) (.cse1 (* |ULTIMATE.start_main_~index2~0#1| 4))) (= (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index1~0#1| .cse0) .cse1) (+ (* (+ (mod (+ 4294967295 ~ARR_SIZE~0 (* |ULTIMATE.start_main_~index1~0#1| 4294967295)) 4294967296) (- 4294967296)) (+ (- 17179869184) .cse0)) |ULTIMATE.start_main_~#array~0#1.offset| .cse1))) [2021-11-21 01:05:23,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:25,298 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (let ((.cse0 (mod (+ 4294967295 ~ARR_SIZE~0 (* |ULTIMATE.start_main_~index1~0#1| 4294967295)) 4294967296)) (.cse1 (+ (- 17179869184) (* (mod ~ARR_SIZE~0 4294967296) 4))) (.cse2 (* |ULTIMATE.start_main_~index2~0#1| 4))) (= (+ (* .cse0 .cse1) |ULTIMATE.start_main_~#array~0#1.offset| .cse2) (+ (* (+ .cse0 (- 4294967296)) .cse1) |ULTIMATE.start_main_~#array~0#1.offset| .cse2))) [2021-11-21 01:05:25,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:27,305 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (let ((.cse0 (* (mod ~ARR_SIZE~0 4294967296) 4)) (.cse1 (* |ULTIMATE.start_main_~index2~0#1| 4))) (= (+ (* (mod (+ 4294967295 ~ARR_SIZE~0 (* |ULTIMATE.start_main_~index1~0#1| 4294967295)) 4294967296) (+ (- 17179869184) .cse0)) |ULTIMATE.start_main_~#array~0#1.offset| .cse1) (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index1~0#1| .cse0) .cse1))) [2021-11-21 01:05:27,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:27,307 INFO L244 Elim1Store]: Index analysis took 24112 ms [2021-11-21 01:05:56,930 WARN L227 SmtUtils]: Spent 29.62s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:05:56,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:05:56,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 800 treesize of output 759 [2021-11-21 01:07:17,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:19,410 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (let ((.cse0 (* (mod ~ARR_SIZE~0 4294967296) 4)) (.cse1 (* |ULTIMATE.start_main_~index2~0#1| 4))) (= (+ (* (mod (+ 4294967295 ~ARR_SIZE~0 (* |ULTIMATE.start_main_~index1~0#1| 4294967295)) 4294967296) .cse0) |ULTIMATE.start_main_~#array~0#1.offset| .cse1) (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index1~0#1| .cse0) .cse1))) [2021-11-21 01:07:19,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:19,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:19,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:19,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:19,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:07:19,896 INFO L244 Elim1Store]: Index analysis took 2728 ms [2021-11-21 01:07:41,003 WARN L227 SmtUtils]: Spent 21.10s on a formula simplification. DAG size of input: 46 DAG size of output: 39 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:07:41,004 INFO L354 Elim1Store]: treesize reduction 108, result has 36.8 percent of original size [2021-11-21 01:07:41,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 800 treesize of output 727 [2021-11-21 01:09:12,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:12,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:13,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:13,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:13,101 INFO L244 Elim1Store]: Index analysis took 908 ms [2021-11-21 01:09:41,576 WARN L227 SmtUtils]: Spent 28.47s on a formula simplification. DAG size of input: 57 DAG size of output: 50 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:09:41,577 INFO L354 Elim1Store]: treesize reduction 114, result has 56.2 percent of original size [2021-11-21 01:09:41,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 851 treesize of output 837 [2021-11-21 01:09:57,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:58,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:58,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:09:58,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:10:00,132 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (let ((.cse0 (* (mod ~ARR_SIZE~0 4294967296) 4)) (.cse1 (* |ULTIMATE.start_main_~index2~0#1| 4))) (= (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index1~0#1| .cse0) .cse1) (+ (* (+ (mod (+ 4294967295 ~ARR_SIZE~0 (* |ULTIMATE.start_main_~index1~0#1| 4294967295)) 4294967296) (- 4294967296)) (+ (- 17179869184) .cse0)) |ULTIMATE.start_main_~#array~0#1.offset| .cse1))) [2021-11-21 01:10:01,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:10:01,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:10:01,853 INFO L244 Elim1Store]: Index analysis took 4075 ms [2021-11-21 01:10:13,667 WARN L227 SmtUtils]: Spent 11.81s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:10:13,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:10:13,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 851 treesize of output 864 [2021-11-21 01:12:47,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:12:49,663 WARN L161 IndexEqualityManager]: solver failed to check if following equality is implied: (let ((.cse0 (* (mod ~ARR_SIZE~0 4294967296) 4)) (.cse1 (* |ULTIMATE.start_main_~index2~0#1| 4))) (= (+ (* (mod (+ 4294967295 ~ARR_SIZE~0 (* |ULTIMATE.start_main_~index1~0#1| 4294967295)) 4294967296) .cse0) |ULTIMATE.start_main_~#array~0#1.offset| .cse1) (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index1~0#1| .cse0) .cse1))) [2021-11-21 01:12:49,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:12:49,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:12:49,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:12:49,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:12:49,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:12:49,745 INFO L244 Elim1Store]: Index analysis took 2109 ms