./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/running_example.i --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_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/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_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/running_example.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/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_424cbd2e-4076-49cb-b00e-57498dfbd2bb/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 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:00:06,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:00:06,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:00:06,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:00:06,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:00:06,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:00:06,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:00:06,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:00:06,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:00:06,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:00:06,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:00:06,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:00:06,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:00:06,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:00:06,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:00:06,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:00:06,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:00:06,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:00:06,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:00:06,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:00:06,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:00:06,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:00:06,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:00:06,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:00:06,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:00:06,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:00:06,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:00:06,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:00:06,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:00:06,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:00:06,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:00:06,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:00:06,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:00:06,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:00:06,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:00:06,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:00:06,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:00:06,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:00:06,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:00:06,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:00:06,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:00:06,418 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:00:06,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:00:06,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:00:06,463 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:00:06,463 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:00:06,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:00:06,471 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:00:06,471 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:00:06,471 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:00:06,471 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:00:06,472 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:00:06,473 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:00:06,473 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:00:06,473 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:00:06,474 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:00:06,474 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:00:06,474 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:00:06,474 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:00:06,475 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:00:06,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:00:06,476 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:00:06,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:00:06,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:00:06,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:00:06,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:00:06,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:00:06,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:00:06,477 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:00:06,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:00:06,478 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:00:06,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:00:06,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:00:06,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:00:06,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:00:06,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:00:06,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:00:06,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:00:06,480 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:00:06,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:00:06,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:00:06,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:00:06,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:00:06,481 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_424cbd2e-4076-49cb-b00e-57498dfbd2bb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f [2021-11-21 01:00:06,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:00:06,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:00:06,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:00:06,786 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:00:06,787 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:00:06,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/heap-data/running_example.i [2021-11-21 01:00:06,866 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/data/e77372bc1/7e022ed9976348729f201514bd17ed54/FLAG7bd6f51ef [2021-11-21 01:00:07,347 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:00:07,348 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/sv-benchmarks/c/heap-data/running_example.i [2021-11-21 01:00:07,376 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/data/e77372bc1/7e022ed9976348729f201514bd17ed54/FLAG7bd6f51ef [2021-11-21 01:00:07,692 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/data/e77372bc1/7e022ed9976348729f201514bd17ed54 [2021-11-21 01:00:07,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:00:07,695 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:00:07,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:00:07,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:00:07,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:00:07,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:00:07" (1/1) ... [2021-11-21 01:00:07,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@513009b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:07, skipping insertion in model container [2021-11-21 01:00:07,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:00:07" (1/1) ... [2021-11-21 01:00:07,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:00:07,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:00:08,107 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_424cbd2e-4076-49cb-b00e-57498dfbd2bb/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-11-21 01:00:08,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:00:08,130 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:00:08,191 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_424cbd2e-4076-49cb-b00e-57498dfbd2bb/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-11-21 01:00:08,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:00:08,243 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:00:08,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:08 WrapperNode [2021-11-21 01:00:08,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:00:08,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:00:08,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:00:08,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:00:08,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:08" (1/1) ... [2021-11-21 01:00:08,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:08" (1/1) ... [2021-11-21 01:00:08,310 INFO L137 Inliner]: procedures = 121, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 72 [2021-11-21 01:00:08,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:00:08,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:00:08,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:00:08,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:00:08,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:08" (1/1) ... [2021-11-21 01:00:08,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:08" (1/1) ... [2021-11-21 01:00:08,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:08" (1/1) ... [2021-11-21 01:00:08,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:08" (1/1) ... [2021-11-21 01:00:08,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:08" (1/1) ... [2021-11-21 01:00:08,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:08" (1/1) ... [2021-11-21 01:00:08,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:08" (1/1) ... [2021-11-21 01:00:08,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:00:08,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:00:08,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:00:08,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:00:08,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:08" (1/1) ... [2021-11-21 01:00:08,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:00:08,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:08,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:00:08,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:00:08,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:00:08,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:00:08,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:00:08,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:00:08,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:00:08,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:00:08,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:00:08,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:00:08,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:00:08,589 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:00:08,592 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:00:08,811 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:00:08,863 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:00:08,863 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:00:08,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:00:08 BoogieIcfgContainer [2021-11-21 01:00:08,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:00:08,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:00:08,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:00:08,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:00:08,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:00:07" (1/3) ... [2021-11-21 01:00:08,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93c25a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:00:08, skipping insertion in model container [2021-11-21 01:00:08,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:08" (2/3) ... [2021-11-21 01:00:08,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93c25a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:00:08, skipping insertion in model container [2021-11-21 01:00:08,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:00:08" (3/3) ... [2021-11-21 01:00:08,875 INFO L111 eAbstractionObserver]: Analyzing ICFG running_example.i [2021-11-21 01:00:08,880 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:00:08,881 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:00:08,932 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:00:08,939 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:00:08,939 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:00:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:00:08,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:08,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:00:08,959 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:08,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1470856896, now seen corresponding path program 1 times [2021-11-21 01:00:08,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:08,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973100543] [2021-11-21 01:00:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:08,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:09,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:09,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973100543] [2021-11-21 01:00:09,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973100543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:09,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:09,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:00:09,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867074608] [2021-11-21 01:00:09,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:09,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:00:09,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:09,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:00:09,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:00:09,159 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:09,185 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2021-11-21 01:00:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:00:09,188 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:00:09,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:09,195 INFO L225 Difference]: With dead ends: 18 [2021-11-21 01:00:09,195 INFO L226 Difference]: Without dead ends: 11 [2021-11-21 01:00:09,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:00:09,201 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:09,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:00:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-21 01:00:09,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-21 01:00:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:09,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-11-21 01:00:09,231 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2021-11-21 01:00:09,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:09,232 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-11-21 01:00:09,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:09,232 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-11-21 01:00:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:00:09,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:09,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:09,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:00:09,234 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:09,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:09,235 INFO L85 PathProgramCache]: Analyzing trace with hash 237321750, now seen corresponding path program 1 times [2021-11-21 01:00:09,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:09,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104637702] [2021-11-21 01:00:09,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:09,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:09,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:09,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104637702] [2021-11-21 01:00:09,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104637702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:09,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:09,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:00:09,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894782337] [2021-11-21 01:00:09,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:09,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:00:09,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:09,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:00:09,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:00:09,321 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:09,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:09,395 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-11-21 01:00:09,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:00:09,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:00:09,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:09,397 INFO L225 Difference]: With dead ends: 22 [2021-11-21 01:00:09,397 INFO L226 Difference]: Without dead ends: 20 [2021-11-21 01:00:09,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:00:09,399 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:09,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:00:09,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-21 01:00:09,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-21 01:00:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-21 01:00:09,405 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 8 [2021-11-21 01:00:09,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:09,406 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-21 01:00:09,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:09,406 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-21 01:00:09,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:00:09,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:09,407 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:09,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:00:09,407 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:09,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:09,408 INFO L85 PathProgramCache]: Analyzing trace with hash 540596448, now seen corresponding path program 1 times [2021-11-21 01:00:09,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:09,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041401129] [2021-11-21 01:00:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:09,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:09,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:09,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041401129] [2021-11-21 01:00:09,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041401129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:00:09,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552971408] [2021-11-21 01:00:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:09,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:09,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:09,698 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:09,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:00:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:09,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:00:09,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:09,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:09,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-21 01:00:09,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:00:09,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:09,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-21 01:00:10,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-11-21 01:00:10,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2021-11-21 01:00:10,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-21 01:00:10,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-11-21 01:00:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:10,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:10,205 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-21 01:00:10,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1820845539] [2021-11-21 01:00:10,230 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:00:10,230 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:00:10,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:00:10,240 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:00:10,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:00:10,301 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@33f275e at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:388) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 01:00:10,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:00:10,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-21 01:00:10,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921305401] [2021-11-21 01:00:10,313 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:10,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:00:10,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:10,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:00:10,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:00:10,315 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:00:10,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:00:10,320 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:10,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:00:10,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:10,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:10,528 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@33f275e at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 01:00:10,530 INFO L158 Benchmark]: Toolchain (without parser) took 2834.40ms. Allocated memory was 92.3MB in the beginning and 127.9MB in the end (delta: 35.7MB). Free memory was 58.2MB in the beginning and 56.8MB in the end (delta: 1.4MB). Peak memory consumption was 34.2MB. Max. memory is 16.1GB. [2021-11-21 01:00:10,531 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 92.3MB. Free memory was 51.0MB in the beginning and 51.0MB in the end (delta: 38.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:00:10,531 INFO L158 Benchmark]: CACSL2BoogieTranslator took 544.90ms. Allocated memory was 92.3MB in the beginning and 127.9MB in the end (delta: 35.7MB). Free memory was 57.9MB in the beginning and 97.9MB in the end (delta: -40.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:00:10,532 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.52ms. Allocated memory is still 127.9MB. Free memory was 97.9MB in the beginning and 95.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:00:10,532 INFO L158 Benchmark]: Boogie Preprocessor took 59.60ms. Allocated memory is still 127.9MB. Free memory was 95.8MB in the beginning and 94.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:00:10,532 INFO L158 Benchmark]: RCFGBuilder took 494.06ms. Allocated memory is still 127.9MB. Free memory was 94.4MB in the beginning and 81.1MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-21 01:00:10,533 INFO L158 Benchmark]: TraceAbstraction took 1661.22ms. Allocated memory is still 127.9MB. Free memory was 80.4MB in the beginning and 56.8MB in the end (delta: 23.6MB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. [2021-11-21 01:00:10,535 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 92.3MB. Free memory was 51.0MB in the beginning and 51.0MB in the end (delta: 38.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 544.90ms. Allocated memory was 92.3MB in the beginning and 127.9MB in the end (delta: 35.7MB). Free memory was 57.9MB in the beginning and 97.9MB in the end (delta: -40.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.52ms. Allocated memory is still 127.9MB. Free memory was 97.9MB in the beginning and 95.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.60ms. Allocated memory is still 127.9MB. Free memory was 95.8MB in the beginning and 94.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 494.06ms. Allocated memory is still 127.9MB. Free memory was 94.4MB in the beginning and 81.1MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1661.22ms. Allocated memory is still 127.9MB. Free memory was 80.4MB in the beginning and 56.8MB in the end (delta: 23.6MB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@33f275e de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@33f275e: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-21 01:00:10,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/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_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/running_example.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/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 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:00:12,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:00:12,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:00:13,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:00:13,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:00:13,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:00:13,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:00:13,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:00:13,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:00:13,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:00:13,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:00:13,039 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:00:13,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:00:13,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:00:13,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:00:13,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:00:13,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:00:13,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:00:13,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:00:13,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:00:13,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:00:13,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:00:13,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:00:13,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:00:13,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:00:13,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:00:13,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:00:13,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:00:13,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:00:13,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:00:13,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:00:13,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:00:13,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:00:13,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:00:13,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:00:13,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:00:13,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:00:13,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:00:13,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:00:13,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:00:13,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:00:13,104 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 01:00:13,149 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:00:13,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:00:13,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:00:13,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:00:13,151 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:00:13,151 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:00:13,151 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:00:13,152 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:00:13,152 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:00:13,152 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:00:13,153 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:00:13,154 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:00:13,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:00:13,156 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:00:13,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:00:13,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:00:13,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:00:13,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:00:13,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:00:13,157 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:00:13,157 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:00:13,157 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:00:13,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:00:13,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:00:13,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:00:13,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:00:13,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:00:13,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:00:13,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:00:13,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:00:13,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:00:13,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:00:13,160 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:00:13,161 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:00:13,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:00:13,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:00:13,161 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:00:13,162 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f [2021-11-21 01:00:13,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:00:13,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:00:13,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:00:13,558 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:00:13,559 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:00:13,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/heap-data/running_example.i [2021-11-21 01:00:13,637 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/data/98d466b47/d846aeb1aaf445528c48111f4b65aa2a/FLAGd40093492 [2021-11-21 01:00:14,203 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:00:14,204 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/sv-benchmarks/c/heap-data/running_example.i [2021-11-21 01:00:14,233 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/data/98d466b47/d846aeb1aaf445528c48111f4b65aa2a/FLAGd40093492 [2021-11-21 01:00:14,506 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/data/98d466b47/d846aeb1aaf445528c48111f4b65aa2a [2021-11-21 01:00:14,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:00:14,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:00:14,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:00:14,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:00:14,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:00:14,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:00:14" (1/1) ... [2021-11-21 01:00:14,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56504f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:14, skipping insertion in model container [2021-11-21 01:00:14,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:00:14" (1/1) ... [2021-11-21 01:00:14,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:00:14,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:00:14,999 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_424cbd2e-4076-49cb-b00e-57498dfbd2bb/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-11-21 01:00:15,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:00:15,030 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:00:15,094 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_424cbd2e-4076-49cb-b00e-57498dfbd2bb/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-11-21 01:00:15,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:00:15,143 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:00:15,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:15 WrapperNode [2021-11-21 01:00:15,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:00:15,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:00:15,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:00:15,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:00:15,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:15" (1/1) ... [2021-11-21 01:00:15,186 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:15" (1/1) ... [2021-11-21 01:00:15,218 INFO L137 Inliner]: procedures = 124, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2021-11-21 01:00:15,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:00:15,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:00:15,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:00:15,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:00:15,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:15" (1/1) ... [2021-11-21 01:00:15,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:15" (1/1) ... [2021-11-21 01:00:15,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:15" (1/1) ... [2021-11-21 01:00:15,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:15" (1/1) ... [2021-11-21 01:00:15,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:15" (1/1) ... [2021-11-21 01:00:15,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:15" (1/1) ... [2021-11-21 01:00:15,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:15" (1/1) ... [2021-11-21 01:00:15,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:00:15,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:00:15,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:00:15,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:00:15,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:15" (1/1) ... [2021-11-21 01:00:15,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:00:15,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:15,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:00:15,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:00:15,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 01:00:15,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:00:15,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:00:15,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:00:15,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:00:15,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 01:00:15,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:00:15,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:00:15,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:00:15,557 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:00:15,558 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:00:15,830 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:00:15,835 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:00:15,835 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 01:00:15,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:00:15 BoogieIcfgContainer [2021-11-21 01:00:15,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:00:15,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:00:15,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:00:15,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:00:15,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:00:14" (1/3) ... [2021-11-21 01:00:15,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194f013b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:00:15, skipping insertion in model container [2021-11-21 01:00:15,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:15" (2/3) ... [2021-11-21 01:00:15,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194f013b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:00:15, skipping insertion in model container [2021-11-21 01:00:15,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:00:15" (3/3) ... [2021-11-21 01:00:15,846 INFO L111 eAbstractionObserver]: Analyzing ICFG running_example.i [2021-11-21 01:00:15,851 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:00:15,852 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:00:15,899 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:00:15,906 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:00:15,907 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:00:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:00:15,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:15,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:15,928 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:15,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:15,933 INFO L85 PathProgramCache]: Analyzing trace with hash 508893296, now seen corresponding path program 1 times [2021-11-21 01:00:15,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:00:15,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694860131] [2021-11-21 01:00:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:15,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:00:15,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:00:15,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:00:15,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:00:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:16,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 01:00:16,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:16,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:16,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:00:16,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694860131] [2021-11-21 01:00:16,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694860131] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:16,168 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:16,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:00:16,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094944667] [2021-11-21 01:00:16,170 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:16,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:00:16,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:00:16,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:00:16,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:00:16,202 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:16,215 INFO L93 Difference]: Finished difference Result 26 states and 42 transitions. [2021-11-21 01:00:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:00:16,217 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:00:16,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:16,224 INFO L225 Difference]: With dead ends: 26 [2021-11-21 01:00:16,224 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 01:00:16,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:00:16,231 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:16,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:00:16,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 01:00:16,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-21 01:00:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:16,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2021-11-21 01:00:16,262 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 8 [2021-11-21 01:00:16,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:16,262 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-11-21 01:00:16,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:16,263 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2021-11-21 01:00:16,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:00:16,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:16,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:16,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:16,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:00:16,477 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:16,478 INFO L85 PathProgramCache]: Analyzing trace with hash 307872697, now seen corresponding path program 1 times [2021-11-21 01:00:16,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:00:16,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527827279] [2021-11-21 01:00:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:16,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:00:16,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:00:16,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:00:16,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:00:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:16,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:00:16,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:16,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:00:16,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:00:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:16,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:16,802 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:00:16,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527827279] [2021-11-21 01:00:16,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527827279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:16,802 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:16,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-21 01:00:16,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860039214] [2021-11-21 01:00:16,803 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:16,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:00:16,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:00:16,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:00:16,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:00:16,806 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:17,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:17,483 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2021-11-21 01:00:17,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:00:17,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 01:00:17,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:17,488 INFO L225 Difference]: With dead ends: 52 [2021-11-21 01:00:17,488 INFO L226 Difference]: Without dead ends: 43 [2021-11-21 01:00:17,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:00:17,490 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:17,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 80 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:00:17,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-21 01:00:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2021-11-21 01:00:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 41 transitions. [2021-11-21 01:00:17,506 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 41 transitions. Word has length 9 [2021-11-21 01:00:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:17,508 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 41 transitions. [2021-11-21 01:00:17,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:17,509 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 41 transitions. [2021-11-21 01:00:17,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:00:17,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:17,510 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:17,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:17,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:00:17,723 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:17,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:17,723 INFO L85 PathProgramCache]: Analyzing trace with hash -44654956, now seen corresponding path program 1 times [2021-11-21 01:00:17,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:00:17,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897380544] [2021-11-21 01:00:17,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:17,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:00:17,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:00:17,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:00:17,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:00:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:17,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:00:17,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:17,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:00:17,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:00:18,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:18,192 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-11-21 01:00:18,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 52 [2021-11-21 01:00:18,209 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:00:18,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-11-21 01:00:18,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:00:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:18,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:20,505 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_4 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_17| (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_17| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_4)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_17| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_17|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_17|) v_DerPreprocessor_3) |v_ULTIMATE.start_main_~p~0#1.offset_17| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_17|)))))) is different from false [2021-11-21 01:00:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-21 01:00:20,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:00:20,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897380544] [2021-11-21 01:00:20,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897380544] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:20,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1584620534] [2021-11-21 01:00:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:20,684 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:00:20,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:00:20,686 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:00:20,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-21 01:00:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:20,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:00:20,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:20,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:00:20,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:00:21,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:21,109 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-11-21 01:00:21,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 52 [2021-11-21 01:00:21,131 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:00:21,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-11-21 01:00:21,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:00:21,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:21,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:23,348 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_20| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_20| (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_20|))))) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_8)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_20| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_20|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_20|) v_DerPreprocessor_7) |v_ULTIMATE.start_main_~p~0#1.offset_20| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) is different from false [2021-11-21 01:00:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-21 01:00:23,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1584620534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:23,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419689502] [2021-11-21 01:00:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:23,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:23,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:23,494 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:23,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:00:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:23,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:00:23,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:23,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:00:23,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:00:23,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:23,830 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-11-21 01:00:23,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 53 [2021-11-21 01:00:23,845 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:00:23,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-21 01:00:23,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:00:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:23,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:26,032 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_23| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_23| (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_23|)))) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_12)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_23| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_23|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_23|) v_DerPreprocessor_11) |v_ULTIMATE.start_main_~p~0#1.offset_23| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) is different from false [2021-11-21 01:00:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-21 01:00:26,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419689502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:26,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:00:26,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-11-21 01:00:26,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645132386] [2021-11-21 01:00:26,156 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:26,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:00:26,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:00:26,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:00:26,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=42, Unknown=3, NotChecked=42, Total=110 [2021-11-21 01:00:26,158 INFO L87 Difference]: Start difference. First operand 29 states and 41 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:27,219 INFO L93 Difference]: Finished difference Result 69 states and 97 transitions. [2021-11-21 01:00:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:00:27,221 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-21 01:00:27,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:27,223 INFO L225 Difference]: With dead ends: 69 [2021-11-21 01:00:27,223 INFO L226 Difference]: Without dead ends: 60 [2021-11-21 01:00:27,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=82, Invalid=137, Unknown=3, NotChecked=84, Total=306 [2021-11-21 01:00:27,225 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:27,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 97 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 132 Unchecked, 0.8s Time] [2021-11-21 01:00:27,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-21 01:00:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2021-11-21 01:00:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2021-11-21 01:00:27,234 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 12 [2021-11-21 01:00:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:27,234 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2021-11-21 01:00:27,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:27,235 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2021-11-21 01:00:27,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:00:27,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:27,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:27,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:27,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:27,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:27,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:00:27,849 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:27,850 INFO L85 PathProgramCache]: Analyzing trace with hash -893074814, now seen corresponding path program 1 times [2021-11-21 01:00:27,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:00:27,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80010110] [2021-11-21 01:00:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:27,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:00:27,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:00:27,858 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:00:27,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 01:00:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:27,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:00:27,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:27,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:27,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-21 01:00:27,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:27,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-21 01:00:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:28,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:00:28,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:28,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:00:28,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-21 01:00:28,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-21 01:00:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:28,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:28,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:00:28,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80010110] [2021-11-21 01:00:28,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80010110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:28,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [276224426] [2021-11-21 01:00:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:28,416 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:00:28,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:00:28,420 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:00:28,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-21 01:00:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:28,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:00:28,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:28,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:28,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-21 01:00:28,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:28,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-21 01:00:28,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:28,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:00:28,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:28,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:00:28,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-21 01:00:28,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-21 01:00:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:28,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:28,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [276224426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:28,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226362146] [2021-11-21 01:00:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:28,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:28,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:28,925 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:28,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:00:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:28,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:00:28,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:28,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:28,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-21 01:00:29,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:29,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-21 01:00:29,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:29,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:00:29,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:29,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:00:29,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-21 01:00:29,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-21 01:00:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:29,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:29,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226362146] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:29,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:00:29,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 7 [2021-11-21 01:00:29,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546031671] [2021-11-21 01:00:29,373 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:29,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:00:29,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:00:29,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:00:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:00:29,375 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:29,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:29,932 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2021-11-21 01:00:29,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:00:29,936 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-21 01:00:29,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:29,938 INFO L225 Difference]: With dead ends: 68 [2021-11-21 01:00:29,938 INFO L226 Difference]: Without dead ends: 59 [2021-11-21 01:00:29,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:00:29,940 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:29,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:00:29,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-21 01:00:29,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-11-21 01:00:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2021-11-21 01:00:29,952 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 15 [2021-11-21 01:00:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:29,952 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2021-11-21 01:00:29,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:29,953 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2021-11-21 01:00:29,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:00:29,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:29,954 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:29,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:30,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-21 01:00:30,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:30,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:00:30,569 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:30,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:30,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1000926759, now seen corresponding path program 2 times [2021-11-21 01:00:30,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:00:30,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334814809] [2021-11-21 01:00:30,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:00:30,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:00:30,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:00:30,571 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:00:30,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-21 01:00:30,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:00:30,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:00:30,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:00:30,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:30,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:00:30,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:00:30,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:31,019 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-11-21 01:00:31,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 70 [2021-11-21 01:00:31,067 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:00:31,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 01:00:31,240 INFO L354 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2021-11-21 01:00:31,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 51 [2021-11-21 01:00:31,335 INFO L354 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2021-11-21 01:00:31,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 64 [2021-11-21 01:00:31,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:00:31,720 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 49 treesize of output 37 [2021-11-21 01:00:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:31,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:33,950 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_39| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_23)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_39| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_39|) (_ bv4 32) v_DerPreprocessor_22) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) is different from false [2021-11-21 01:00:36,381 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_39| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_21| (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_39| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_22| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_16| (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32))) (or (bvslt |v_ULTIMATE.start_main_~x~0#1_16| (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_21|))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_25)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_21| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_21|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_39|) v_DerPreprocessor_24) |v_ULTIMATE.start_main_~p~0#1.offset_39| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_22| (_ bv4 32)) v_DerPreprocessor_23))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_39| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_39|) (_ bv4 32) v_DerPreprocessor_22) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_16|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_16| (_ bv20 32)))) is different from false [2021-11-21 01:00:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-21 01:00:37,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:00:37,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334814809] [2021-11-21 01:00:37,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334814809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:37,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1700958169] [2021-11-21 01:00:37,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:00:37,016 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:00:37,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:00:37,021 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:00:37,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-21 01:00:37,147 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:00:37,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371037862] [2021-11-21 01:00:37,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:00:37,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:37,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:37,157 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:37,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 1 [2021-11-21 01:00:37,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:00:37,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:00:37,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:00:37,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:00:37,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:37,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:00:37,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:00:37,399 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:00:37,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-21 01:00:37,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:37,465 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-21 01:00:37,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-11-21 01:00:37,780 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-21 01:00:37,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-21 01:00:37,814 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-21 01:00:37,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 44 treesize of output 46 [2021-11-21 01:00:37,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:00:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:37,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:40,044 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_42| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_30 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_43| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_31)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_42|) v_DerPreprocessor_30) |v_ULTIMATE.start_main_~p~0#1.offset_42| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_43|))))))))) is different from false [2021-11-21 01:00:42,310 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_42| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_20| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_28| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_43| (_ BitVec 32)) (v_DerPreprocessor_30 (_ BitVec 32)) (v_DerPreprocessor_33 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_26| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_43| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_26| (_ bv1 1)) |v_ULTIMATE.start_main_~p~0#1.base_43|))))))))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_33)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_26| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_26|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_43|) v_DerPreprocessor_32) |v_ULTIMATE.start_main_~p~0#1.offset_43| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_28| (_ bv4 32)) v_DerPreprocessor_31))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_42|) v_DerPreprocessor_30) |v_ULTIMATE.start_main_~p~0#1.offset_42| |v_ULTIMATE.start_main_~x~0#1_20|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_26|)))))) is different from false [2021-11-21 01:00:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-21 01:00:42,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371037862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:42,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-21 01:00:42,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 16 [2021-11-21 01:00:42,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033527986] [2021-11-21 01:00:42,712 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:42,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:00:42,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:00:42,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:00:42,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=99, Unknown=4, NotChecked=92, Total=240 [2021-11-21 01:00:42,716 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:45,051 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_42| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_30 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_43| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_31)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_42|) v_DerPreprocessor_30) |v_ULTIMATE.start_main_~p~0#1.offset_42| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_43|))))))))) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_39| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_23)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_39| (store (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_39|) (_ bv4 32) v_DerPreprocessor_22) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (exists ((v_arrayElimCell_35 (_ BitVec 1))) (let ((.cse2 (bvneg (bvneg v_arrayElimCell_35)))) (and (= (_ bv0 1) (bvadd (bvneg .cse2) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse2 (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~list~0#1.base|))))))) (bvsge (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|) (_ bv10 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_main_~tail~0#1.base|))) (= |c_ULTIMATE.start_main_~list~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |c_ULTIMATE.start_main_~tail~0#1.base|))) is different from false [2021-11-21 01:00:47,131 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_42| (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_30 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_43| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_31)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_43|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_42|) v_DerPreprocessor_30) |v_ULTIMATE.start_main_~p~0#1.offset_42| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_43|))))))))) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_39| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_23)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_39| (store (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_39|) (_ bv4 32) v_DerPreprocessor_22) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (exists ((v_arrayElimCell_35 (_ BitVec 1))) (let ((.cse2 (bvneg (bvneg v_arrayElimCell_35)))) (and (= (_ bv0 1) (bvadd (bvneg .cse2) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse2 (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~list~0#1.base|))))))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_main_~tail~0#1.base|))) (= |c_ULTIMATE.start_main_~list~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |c_ULTIMATE.start_main_~tail~0#1.base|))) is different from false [2021-11-21 01:00:47,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:47,634 INFO L93 Difference]: Finished difference Result 75 states and 108 transitions. [2021-11-21 01:00:47,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:00:47,635 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-21 01:00:47,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:47,636 INFO L225 Difference]: With dead ends: 75 [2021-11-21 01:00:47,636 INFO L226 Difference]: Without dead ends: 66 [2021-11-21 01:00:47,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=119, Invalid=241, Unknown=6, NotChecked=234, Total=600 [2021-11-21 01:00:47,638 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:47,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 110 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 174 Unchecked, 0.5s Time] [2021-11-21 01:00:47,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-21 01:00:47,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-11-21 01:00:47,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4745762711864407) internal successors, (87), 59 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:47,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2021-11-21 01:00:47,657 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 15 [2021-11-21 01:00:47,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:47,658 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2021-11-21 01:00:47,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:47,658 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2021-11-21 01:00:47,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:00:47,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:47,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:47,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:47,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:48,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:48,065 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:48,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:48,066 INFO L85 PathProgramCache]: Analyzing trace with hash 680874398, now seen corresponding path program 1 times [2021-11-21 01:00:48,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:00:48,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94838558] [2021-11-21 01:00:48,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:48,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:00:48,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:00:48,067 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:00:48,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 01:00:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:48,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:00:48,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:48,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:00:48,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:00:48,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:00:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:48,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:48,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:00:48,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94838558] [2021-11-21 01:00:48,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94838558] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:48,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [916077262] [2021-11-21 01:00:48,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:48,460 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:00:48,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:00:48,468 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:00:48,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-21 01:00:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:48,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:00:48,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:48,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:00:48,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:00:48,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:00:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:48,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:49,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [916077262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:49,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293471130] [2021-11-21 01:00:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:49,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:49,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:49,313 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:49,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 01:00:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:49,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:00:49,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:49,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:00:49,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 01:00:49,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:00:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:49,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:49,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293471130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:49,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:00:49,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 10, 7, 7] total 20 [2021-11-21 01:00:49,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240598585] [2021-11-21 01:00:49,547 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:49,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 01:00:49,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:00:49,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 01:00:49,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:00:49,549 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:52,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:52,128 INFO L93 Difference]: Finished difference Result 135 states and 189 transitions. [2021-11-21 01:00:52,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 01:00:52,129 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-21 01:00:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:52,131 INFO L225 Difference]: With dead ends: 135 [2021-11-21 01:00:52,131 INFO L226 Difference]: Without dead ends: 118 [2021-11-21 01:00:52,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=262, Invalid=608, Unknown=0, NotChecked=0, Total=870 [2021-11-21 01:00:52,133 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 101 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:52,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 149 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-21 01:00:52,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-21 01:00:52,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 96. [2021-11-21 01:00:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.4736842105263157) internal successors, (140), 95 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 140 transitions. [2021-11-21 01:00:52,150 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 140 transitions. Word has length 17 [2021-11-21 01:00:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:52,150 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 140 transitions. [2021-11-21 01:00:52,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 140 transitions. [2021-11-21 01:00:52,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:00:52,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:52,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:52,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:52,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:52,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:52,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:52,755 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:52,755 INFO L85 PathProgramCache]: Analyzing trace with hash -128474150, now seen corresponding path program 1 times [2021-11-21 01:00:52,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:00:52,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280313282] [2021-11-21 01:00:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:52,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:00:52,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:00:52,757 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:00:52,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 01:00:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:52,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:00:52,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:52,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:00:52,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 01:00:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:00:52,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:00:52,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:00:52,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280313282] [2021-11-21 01:00:52,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280313282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:52,998 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:52,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-21 01:00:52,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925153526] [2021-11-21 01:00:52,998 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:52,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:00:52,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:00:52,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:00:52,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:00:52,999 INFO L87 Difference]: Start difference. First operand 96 states and 140 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:53,594 INFO L93 Difference]: Finished difference Result 127 states and 182 transitions. [2021-11-21 01:00:53,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:00:53,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-21 01:00:53,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:53,597 INFO L225 Difference]: With dead ends: 127 [2021-11-21 01:00:53,598 INFO L226 Difference]: Without dead ends: 98 [2021-11-21 01:00:53,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:00:53,599 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:53,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 59 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:00:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-21 01:00:53,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-11-21 01:00:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.4526315789473685) internal successors, (138), 95 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 138 transitions. [2021-11-21 01:00:53,614 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 138 transitions. Word has length 17 [2021-11-21 01:00:53,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:53,615 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 138 transitions. [2021-11-21 01:00:53,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:00:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 138 transitions. [2021-11-21 01:00:53,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:00:53,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:53,616 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:53,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:53,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:00:53,829 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:53,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1524987734, now seen corresponding path program 1 times [2021-11-21 01:00:53,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:00:53,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917254729] [2021-11-21 01:00:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:53,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:00:53,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:00:53,832 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:00:53,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-21 01:00:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:53,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:00:53,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:53,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:00:53,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:00:54,037 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:00:54,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-21 01:00:54,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:54,082 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-21 01:00:54,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-11-21 01:00:54,276 INFO L354 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2021-11-21 01:00:54,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 51 [2021-11-21 01:00:54,369 INFO L354 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2021-11-21 01:00:54,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 64 [2021-11-21 01:00:54,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-21 01:00:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:00:54,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:56,826 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_64| (_ BitVec 32)) (v_DerPreprocessor_37 (_ BitVec 32)) (v_DerPreprocessor_38 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_38)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64|) (_ bv4 32) v_DerPreprocessor_37) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) is different from false [2021-11-21 01:00:59,351 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_63| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_38| (_ BitVec 32)) (v_DerPreprocessor_40 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_35| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_29| (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_64| (_ BitVec 32)) (v_DerPreprocessor_37 (_ BitVec 32)) (v_DerPreprocessor_38 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_40)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_35| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_35|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_63|) v_DerPreprocessor_39) |v_ULTIMATE.start_main_~p~0#1.offset_63| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_38| (_ bv4 32)) v_DerPreprocessor_38))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64|) (_ bv4 32) v_DerPreprocessor_37) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_29|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_35|))))))) (bvslt |v_ULTIMATE.start_main_~x~0#1_29| (_ bv10 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_29| (_ bv20 32)))) is different from false [2021-11-21 01:00:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2021-11-21 01:00:59,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:00:59,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917254729] [2021-11-21 01:00:59,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917254729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:59,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2112559749] [2021-11-21 01:00:59,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:59,848 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:00:59,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:00:59,861 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:00:59,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-21 01:01:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:00,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:01:00,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:00,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:01:00,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:01:00,183 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:01:00,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-21 01:01:00,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:00,235 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-21 01:01:00,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-11-21 01:01:00,430 INFO L354 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2021-11-21 01:01:00,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 51 [2021-11-21 01:01:00,531 INFO L354 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2021-11-21 01:01:00,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 64 [2021-11-21 01:01:00,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-21 01:01:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:01:00,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:02,919 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_69| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_44 (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_45)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_69| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_69|) (_ bv4 32) v_DerPreprocessor_44) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) is different from false [2021-11-21 01:01:05,424 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_69| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_67| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_40| (_ BitVec 32)) (v_DerPreprocessor_46 (_ BitVec 32)) (v_DerPreprocessor_47 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_44| (_ BitVec 32)) (v_DerPreprocessor_44 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_34| (_ BitVec 32))) (or (bvslt |v_ULTIMATE.start_main_~x~0#1_34| (_ bv10 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_34| (_ bv20 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_40|))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_47)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_40| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_40|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_67|) v_DerPreprocessor_46) |v_ULTIMATE.start_main_~p~0#1.offset_67| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_44| (_ bv4 32)) v_DerPreprocessor_45))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_69| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_69|) (_ bv4 32) v_DerPreprocessor_44) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_34|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) is different from false [2021-11-21 01:01:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2021-11-21 01:01:06,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2112559749] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:01:06,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973153143] [2021-11-21 01:01:06,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:06,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:06,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:06,033 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:06,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 01:01:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:06,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:01:06,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:06,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:01:06,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:01:06,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:06,393 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-11-21 01:01:06,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 70 [2021-11-21 01:01:06,449 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:01:06,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-21 01:01:06,751 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-21 01:01:06,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 73 [2021-11-21 01:01:06,783 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-21 01:01:06,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 45 treesize of output 47 [2021-11-21 01:01:06,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:01:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:01:06,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:08,954 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_53 (_ BitVec 32)) (v_DerPreprocessor_52 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_73| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_70| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_53)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_73| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_73|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_70|) v_DerPreprocessor_52) |v_ULTIMATE.start_main_~p~0#1.offset_70| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_73|)))))) is different from false [2021-11-21 01:01:11,304 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_53 (_ BitVec 32)) (v_DerPreprocessor_54 (_ BitVec 32)) (v_DerPreprocessor_52 (_ BitVec 32)) (v_DerPreprocessor_55 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_45| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_73| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_39| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_50| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_70| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_71| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_45|))))) (not (= (_ bv0 1) (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_45| (_ bv1 1)) |v_ULTIMATE.start_main_~p~0#1.base_73|))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_55)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_45| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_45|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_71|) v_DerPreprocessor_54) |v_ULTIMATE.start_main_~p~0#1.offset_71| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_50| (_ bv4 32)) v_DerPreprocessor_53))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_73| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_73|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_70|) v_DerPreprocessor_52) |v_ULTIMATE.start_main_~p~0#1.offset_70| |v_ULTIMATE.start_main_~x~0#1_39|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) is different from false [2021-11-21 01:01:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2021-11-21 01:01:11,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973153143] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:01:11,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:01:11,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 18 [2021-11-21 01:01:11,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974389672] [2021-11-21 01:01:11,646 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:01:11,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 01:01:11,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:11,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 01:01:11,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=101, Unknown=6, NotChecked=150, Total=306 [2021-11-21 01:01:11,647 INFO L87 Difference]: Start difference. First operand 96 states and 138 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:01:13,987 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (_ bv0 32)))) (and (forall ((|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_64| (_ BitVec 32)) (v_DerPreprocessor_37 (_ BitVec 32)) (v_DerPreprocessor_38 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_38)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64|) (_ bv4 32) v_DerPreprocessor_37) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) (not (bvslt .cse1 (_ bv10 32))) (forall ((v_DerPreprocessor_53 (_ BitVec 32)) (v_DerPreprocessor_52 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_73| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_70| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_53)))) (store .cse2 |v_ULTIMATE.start_main_~p~0#1.base_73| (store (store (select .cse2 |v_ULTIMATE.start_main_~p~0#1.base_73|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_70|) v_DerPreprocessor_52) |v_ULTIMATE.start_main_~p~0#1.offset_70| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_73|)))))) (= |c_ULTIMATE.start_main_~p~0#1.offset| (_ bv0 32)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_main_~tail~0#1.base|))) (= |c_ULTIMATE.start_main_~list~0#1.offset| (_ bv0 32)) (exists ((v_arrayElimCell_65 (_ BitVec 1))) (let ((.cse3 (bvneg v_arrayElimCell_65))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg .cse3))) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse3 (select |c_#valid| |c_ULTIMATE.start_main_~list~0#1.base|)))))) (not (bvsgt .cse1 (_ bv20 32))) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |c_ULTIMATE.start_main_~tail~0#1.base|)) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_69| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_44 (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsge (select (select (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_45)))) (store .cse4 |v_ULTIMATE.start_main_~p~0#1.base_69| (store (store (select .cse4 |v_ULTIMATE.start_main_~p~0#1.base_69|) (_ bv4 32) v_DerPreprocessor_44) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))))) is different from false [2021-11-21 01:01:16,075 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_64| (_ BitVec 32)) (v_DerPreprocessor_37 (_ BitVec 32)) (v_DerPreprocessor_38 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_38)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_64|) (_ bv4 32) v_DerPreprocessor_37) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) (forall ((v_DerPreprocessor_53 (_ BitVec 32)) (v_DerPreprocessor_52 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_73| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_70| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_53)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_73| (store (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_73|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_70|) v_DerPreprocessor_52) |v_ULTIMATE.start_main_~p~0#1.offset_70| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_73|)))))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_main_~tail~0#1.base|))) (= |c_ULTIMATE.start_main_~list~0#1.offset| (_ bv0 32)) (exists ((v_arrayElimCell_65 (_ BitVec 1))) (let ((.cse2 (bvneg v_arrayElimCell_65))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg .cse2))) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse2 (select |c_#valid| |c_ULTIMATE.start_main_~list~0#1.base|)))))) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |c_ULTIMATE.start_main_~tail~0#1.base|)) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_69| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_44 (_ BitVec 32)) (v_DerPreprocessor_45 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsge (select (select (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_45)))) (store .cse3 |v_ULTIMATE.start_main_~p~0#1.base_69| (store (store (select .cse3 |v_ULTIMATE.start_main_~p~0#1.base_69|) (_ bv4 32) v_DerPreprocessor_44) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32))))) is different from false [2021-11-21 01:01:16,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:16,554 INFO L93 Difference]: Finished difference Result 136 states and 196 transitions. [2021-11-21 01:01:16,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:01:16,556 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-21 01:01:16,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:16,557 INFO L225 Difference]: With dead ends: 136 [2021-11-21 01:01:16,557 INFO L226 Difference]: Without dead ends: 112 [2021-11-21 01:01:16,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=94, Invalid=170, Unknown=8, NotChecked=280, Total=552 [2021-11-21 01:01:16,558 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:16,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 96 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 79 Invalid, 0 Unknown, 178 Unchecked, 0.6s Time] [2021-11-21 01:01:16,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-21 01:01:16,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2021-11-21 01:01:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.4408602150537635) internal successors, (134), 93 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:01:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 134 transitions. [2021-11-21 01:01:16,575 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 134 transitions. Word has length 17 [2021-11-21 01:01:16,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:16,575 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 134 transitions. [2021-11-21 01:01:16,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:01:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 134 transitions. [2021-11-21 01:01:16,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:01:16,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:16,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:16,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:16,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:16,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:17,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:01:17,193 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:17,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:17,194 INFO L85 PathProgramCache]: Analyzing trace with hash -668283619, now seen corresponding path program 1 times [2021-11-21 01:01:17,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:17,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667278447] [2021-11-21 01:01:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:17,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:17,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:17,196 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:17,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-21 01:01:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:17,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:01:17,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:17,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:01:17,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:01:17,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:17,478 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-21 01:01:17,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 93 [2021-11-21 01:01:17,484 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 126 treesize of output 116 [2021-11-21 01:01:17,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:17,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:01:17,516 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-21 01:01:17,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 89 [2021-11-21 01:01:17,534 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-21 01:01:17,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 89 [2021-11-21 01:01:17,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:17,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:01:17,937 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:01:17,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 91 [2021-11-21 01:01:17,964 INFO L354 Elim1Store]: treesize reduction 51, result has 20.3 percent of original size [2021-11-21 01:01:17,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 91 [2021-11-21 01:01:17,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:17,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:01:17,976 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-21 01:01:17,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2021-11-21 01:01:18,026 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:01:18,027 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 51 [2021-11-21 01:01:18,032 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:01:18,032 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 42 treesize of output 30 [2021-11-21 01:01:18,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-21 01:01:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:18,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:18,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:18,497 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 348 treesize of output 347 [2021-11-21 01:01:18,736 INFO L354 Elim1Store]: treesize reduction 51, result has 48.5 percent of original size [2021-11-21 01:01:18,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 525 treesize of output 355 [2021-11-21 01:01:18,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:18,867 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 347 treesize of output 353 [2021-11-21 01:01:19,002 INFO L354 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2021-11-21 01:01:19,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 531 treesize of output 352 [2021-11-21 01:01:19,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:19,093 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 344 treesize of output 350 [2021-11-21 01:01:19,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-21 01:01:19,724 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-21 01:01:19,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2021-11-21 01:01:20,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:20,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-21 01:01:20,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-21 01:01:25,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:25,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 82 treesize of output 102 [2021-11-21 01:01:26,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:26,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 117 treesize of output 137 [2021-11-21 01:01:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:30,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:30,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667278447] [2021-11-21 01:01:30,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667278447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:01:30,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [655611669] [2021-11-21 01:01:30,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:30,167 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:01:30,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:01:30,168 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:01:30,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-21 01:01:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:30,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:01:30,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:30,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:01:30,477 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-21 01:01:30,478 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 2 case distinctions, treesize of input 116 treesize of output 94 [2021-11-21 01:01:30,483 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 127 treesize of output 117 [2021-11-21 01:01:30,537 INFO L354 Elim1Store]: treesize reduction 150, result has 14.3 percent of original size [2021-11-21 01:01:30,537 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 2 case distinctions, treesize of input 124 treesize of output 90 [2021-11-21 01:01:30,553 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-21 01:01:30,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 105 [2021-11-21 01:01:30,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:31,039 INFO L354 Elim1Store]: treesize reduction 75, result has 16.7 percent of original size [2021-11-21 01:01:31,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 110 [2021-11-21 01:01:31,068 INFO L354 Elim1Store]: treesize reduction 87, result has 17.9 percent of original size [2021-11-21 01:01:31,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 125 treesize of output 104 [2021-11-21 01:01:31,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:31,092 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 01:01:31,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 84 [2021-11-21 01:01:31,146 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-21 01:01:31,147 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 58 [2021-11-21 01:01:31,154 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:01:31,155 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 32 [2021-11-21 01:01:31,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-21 01:01:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:31,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:31,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:31,578 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 658 treesize of output 627 [2021-11-21 01:01:34,564 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-11-21 01:01:34,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 1081 treesize of output 635 [2021-11-21 01:01:37,170 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-11-21 01:01:37,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 1081 treesize of output 635 [2021-11-21 01:01:37,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:37,228 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 627 treesize of output 617 [2021-11-21 01:01:37,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:37,303 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 617 treesize of output 607 [2021-11-21 01:01:37,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-21 01:01:37,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-21 01:01:38,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:38,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-11-21 01:01:38,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-21 01:01:39,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-21 01:01:39,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-21 01:01:39,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:39,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 01:01:40,688 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-21 01:01:40,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-21 01:01:40,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-21 01:01:41,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:41,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 539 treesize of output 527 [2021-11-21 01:01:41,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:41,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 657 treesize of output 645 [2021-11-21 01:01:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:43,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [655611669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:01:43,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342333588] [2021-11-21 01:01:43,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:43,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:43,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:43,872 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:43,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-21 01:01:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:43,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:01:43,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:43,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:01:44,198 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-21 01:01:44,198 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 2 case distinctions, treesize of input 119 treesize of output 97 [2021-11-21 01:01:44,204 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 118 treesize of output 114 [2021-11-21 01:01:44,253 INFO L354 Elim1Store]: treesize reduction 174, result has 12.6 percent of original size [2021-11-21 01:01:44,253 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 2 case distinctions, treesize of input 121 treesize of output 87 [2021-11-21 01:01:44,267 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-21 01:01:44,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 108 [2021-11-21 01:01:44,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:44,621 INFO L354 Elim1Store]: treesize reduction 75, result has 16.7 percent of original size [2021-11-21 01:01:44,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 110 [2021-11-21 01:01:44,650 INFO L354 Elim1Store]: treesize reduction 87, result has 17.9 percent of original size [2021-11-21 01:01:44,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 125 treesize of output 104 [2021-11-21 01:01:44,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:01:44,678 INFO L354 Elim1Store]: treesize reduction 67, result has 16.3 percent of original size [2021-11-21 01:01:44,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 84 [2021-11-21 01:01:44,718 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-21 01:01:44,718 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 58 [2021-11-21 01:01:44,725 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:01:44,725 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 32 [2021-11-21 01:01:44,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-21 01:01:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:44,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:45,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:45,067 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 659 treesize of output 628 [2021-11-21 01:01:48,055 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-11-21 01:01:48,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 1082 treesize of output 636 [2021-11-21 01:01:50,632 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-11-21 01:01:50,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 1082 treesize of output 636 [2021-11-21 01:01:50,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:50,694 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 628 treesize of output 618 [2021-11-21 01:01:50,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:50,750 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 618 treesize of output 608 [2021-11-21 01:01:50,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-21 01:01:51,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-21 01:01:51,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-21 01:01:51,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:01:51,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 46 [2021-11-21 01:01:51,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-21 01:01:52,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-21 01:01:52,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:01:52,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-21 01:04:17,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:04:17,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 214 treesize of output 222 [2021-11-21 01:04:27,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:04:27,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 211 treesize of output 223 [2021-11-21 01:04:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:04:28,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342333588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:28,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:04:28,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 8, 7, 8] total 16 [2021-11-21 01:04:28,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113702569] [2021-11-21 01:04:28,921 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:04:28,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:04:28,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:04:28,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:04:28,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=196, Unknown=1, NotChecked=0, Total=240 [2021-11-21 01:04:28,923 INFO L87 Difference]: Start difference. First operand 94 states and 134 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:04:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:29,945 INFO L93 Difference]: Finished difference Result 156 states and 222 transitions. [2021-11-21 01:04:29,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:04:29,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 01:04:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:29,947 INFO L225 Difference]: With dead ends: 156 [2021-11-21 01:04:29,947 INFO L226 Difference]: Without dead ends: 132 [2021-11-21 01:04:29,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=66, Invalid=275, Unknown=1, NotChecked=0, Total=342 [2021-11-21 01:04:29,949 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:29,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 140 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 123 Invalid, 0 Unknown, 75 Unchecked, 0.8s Time] [2021-11-21 01:04:29,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-21 01:04:29,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 94. [2021-11-21 01:04:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.4408602150537635) internal successors, (134), 93 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:04:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 134 transitions. [2021-11-21 01:04:29,977 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 134 transitions. Word has length 18 [2021-11-21 01:04:29,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:29,977 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 134 transitions. [2021-11-21 01:04:29,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:04:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 134 transitions. [2021-11-21 01:04:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:04:29,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:29,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:29,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:30,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:30,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:30,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:04:30,581 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:30,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:30,582 INFO L85 PathProgramCache]: Analyzing trace with hash -611025317, now seen corresponding path program 1 times [2021-11-21 01:04:30,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:04:30,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300039887] [2021-11-21 01:04:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:30,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:04:30,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:04:30,583 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:04:30,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-21 01:04:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:30,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:04:30,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:30,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:04:30,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:04:30,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:30,890 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-11-21 01:04:30,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 52 [2021-11-21 01:04:30,903 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:04:30,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-11-21 01:04:30,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 01:04:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:04:31,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:33,171 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_71 (_ BitVec 32)) (v_DerPreprocessor_70 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_93| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_90| (_ BitVec 32))) (or (bvslt (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_71)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_93| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_93|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_90|) v_DerPreprocessor_70) |v_ULTIMATE.start_main_~p~0#1.offset_90| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv20 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_93|)))))) is different from false [2021-11-21 01:04:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-21 01:04:33,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:04:33,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300039887] [2021-11-21 01:04:33,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300039887] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:33,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [15357314] [2021-11-21 01:04:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:33,257 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:04:33,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:04:33,258 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:04:33,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-21 01:04:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:33,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:04:33,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:33,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:04:33,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:04:33,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:33,588 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-11-21 01:04:33,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 53 [2021-11-21 01:04:33,602 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:04:33,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-21 01:04:33,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 01:04:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:04:33,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:35,957 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_94| (_ BitVec 32)) (v_DerPreprocessor_75 (_ BitVec 32)) (v_DerPreprocessor_74 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_97| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_75)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_97| (store (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_97|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_94|) v_DerPreprocessor_74) |v_ULTIMATE.start_main_~p~0#1.offset_94| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|))) (or (bvslt .cse0 (_ bv20 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_97|)))) (not (bvsle .cse0 (_ bv20 32)))))) is different from false [2021-11-21 01:04:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-21 01:04:36,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [15357314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:36,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769379107] [2021-11-21 01:04:36,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:36,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:36,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:04:36,106 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:04:36,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-21 01:04:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:36,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:04:36,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:36,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:04:36,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:04:36,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:36,434 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-11-21 01:04:36,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 53 [2021-11-21 01:04:36,446 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:04:36,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-21 01:04:36,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 01:04:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:04:36,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:38,690 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_101| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_98| (_ BitVec 32)) (v_DerPreprocessor_79 (_ BitVec 32)) (v_DerPreprocessor_78 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_79)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_101| (store (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_101|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_98|) v_DerPreprocessor_78) |v_ULTIMATE.start_main_~p~0#1.offset_98| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|))) (or (not (bvsle .cse0 (_ bv20 32))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_101|)))) (bvslt .cse0 (_ bv20 32))))) is different from false [2021-11-21 01:04:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-21 01:04:38,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769379107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:38,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:04:38,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 8, 7, 8] total 16 [2021-11-21 01:04:38,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647219293] [2021-11-21 01:04:38,813 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:04:38,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:04:38,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:04:38,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:04:38,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=120, Unknown=3, NotChecked=72, Total=240 [2021-11-21 01:04:38,815 INFO L87 Difference]: Start difference. First operand 94 states and 134 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:04:40,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:40,209 INFO L93 Difference]: Finished difference Result 165 states and 235 transitions. [2021-11-21 01:04:40,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:04:40,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 01:04:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:40,211 INFO L225 Difference]: With dead ends: 165 [2021-11-21 01:04:40,211 INFO L226 Difference]: Without dead ends: 122 [2021-11-21 01:04:40,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=163, Invalid=352, Unknown=3, NotChecked=132, Total=650 [2021-11-21 01:04:40,213 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 73 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:40,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 119 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 138 Invalid, 0 Unknown, 144 Unchecked, 0.9s Time] [2021-11-21 01:04:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-21 01:04:40,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2021-11-21 01:04:40,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.4095238095238096) internal successors, (148), 105 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:04:40,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 148 transitions. [2021-11-21 01:04:40,227 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 148 transitions. Word has length 18 [2021-11-21 01:04:40,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:40,228 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 148 transitions. [2021-11-21 01:04:40,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:04:40,228 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 148 transitions. [2021-11-21 01:04:40,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:04:40,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:40,229 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:40,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:40,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:40,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:40,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:04:40,845 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:40,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:40,845 INFO L85 PathProgramCache]: Analyzing trace with hash -776135564, now seen corresponding path program 3 times [2021-11-21 01:04:40,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:04:40,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145521834] [2021-11-21 01:04:40,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:04:40,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:04:40,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:04:40,846 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:04:40,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-21 01:04:40,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:04:40,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:04:40,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 01:04:40,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:40,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:04:40,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:04:41,118 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:04:41,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-11-21 01:04:41,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:41,171 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-21 01:04:41,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-11-21 01:04:41,424 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-21 01:04:41,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 75 [2021-11-21 01:04:41,455 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-21 01:04:41,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 47 treesize of output 49 [2021-11-21 01:04:41,666 INFO L354 Elim1Store]: treesize reduction 93, result has 29.0 percent of original size [2021-11-21 01:04:41,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 67 [2021-11-21 01:04:41,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:04:41,988 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 49 treesize of output 37 [2021-11-21 01:04:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:04:42,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:44,185 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_86 (_ BitVec 32)) (v_DerPreprocessor_87 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_105| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_87)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_105| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_105|) (_ bv4 32) v_DerPreprocessor_86) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) is different from false [2021-11-21 01:04:46,498 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_86 (_ BitVec 32)) (v_DerPreprocessor_87 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_105| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_88 (_ BitVec 32)) (v_DerPreprocessor_89 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_75| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_69| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_55| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_102| (_ BitVec 32))) (or (bvslt |v_ULTIMATE.start_main_~x~0#1_55| (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_69|)))))) (bvsgt |v_ULTIMATE.start_main_~x~0#1_55| (_ bv20 32)) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_89)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_69| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_69|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_102|) v_DerPreprocessor_88) |v_ULTIMATE.start_main_~p~0#1.offset_102| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_75| (_ bv4 32)) v_DerPreprocessor_87))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_105| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_105|) (_ bv4 32) v_DerPreprocessor_86) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_55|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) is different from false [2021-11-21 01:04:49,743 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~tail~0#1.offset_77| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_75| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_103| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_55| (_ BitVec 32)) (v_DerPreprocessor_90 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_102| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_57| (_ BitVec 32)) (v_DerPreprocessor_91 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_70| (_ BitVec 32)) (v_DerPreprocessor_86 (_ BitVec 32)) (v_DerPreprocessor_87 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_105| (_ BitVec 32)) (v_DerPreprocessor_88 (_ BitVec 32)) (v_DerPreprocessor_89 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_69| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_91)))) (store .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_70| (store (store (store (select .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_70|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_103|) v_DerPreprocessor_90) |v_ULTIMATE.start_main_~p~0#1.offset_103| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_77| (_ bv4 32)) v_DerPreprocessor_89))))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_69| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_69|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_102|) v_DerPreprocessor_88) |v_ULTIMATE.start_main_~p~0#1.offset_102| |v_ULTIMATE.start_main_~x~0#1_57|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_75| (_ bv4 32)) v_DerPreprocessor_87))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_105| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_105|) (_ bv4 32) v_DerPreprocessor_86) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_55|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_70|)))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_70| (_ bv1 1)) |v_ULTIMATE.start_main_~tail~0#1.base_69|)))))))) (bvslt |v_ULTIMATE.start_main_~x~0#1_55| (_ bv10 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_55| (_ bv20 32)))) is different from false [2021-11-21 01:04:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2021-11-21 01:04:51,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:04:51,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145521834] [2021-11-21 01:04:51,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145521834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:51,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1692043689] [2021-11-21 01:04:51,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:04:51,322 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:04:51,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:04:51,323 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:04:51,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-21 01:04:51,456 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:04:51,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982094731] [2021-11-21 01:04:51,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:04:51,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:51,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:04:51,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 1 [2021-11-21 01:04:51,459 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:04:51,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-21 01:04:52,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:04:52,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:04:52,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:04:52,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:52,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:04:52,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:04:52,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:04:52,556 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-11-21 01:04:52,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 70 [2021-11-21 01:04:52,620 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:04:52,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-21 01:04:52,846 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-21 01:04:52,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 78 [2021-11-21 01:04:52,900 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-21 01:04:52,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 67 [2021-11-21 01:04:53,244 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-21 01:04:53,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 91 [2021-11-21 01:04:53,292 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-21 01:04:53,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2021-11-21 01:04:53,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:04:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:04:53,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:55,488 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_110| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_106| (_ BitVec 32)) (v_DerPreprocessor_98 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_99 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_99)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_110| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_110|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_106|) v_DerPreprocessor_98) |v_ULTIMATE.start_main_~p~0#1.offset_106| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_110|)))))) is different from false [2021-11-21 01:04:57,823 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_100 (_ BitVec 32)) (v_DerPreprocessor_101 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_84| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_107| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_110| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_106| (_ BitVec 32)) (v_DerPreprocessor_98 (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_61| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_76| (_ BitVec 32)) (v_DerPreprocessor_99 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_101)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_76| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_76|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_107|) v_DerPreprocessor_100) |v_ULTIMATE.start_main_~p~0#1.offset_107| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_84| (_ bv4 32)) v_DerPreprocessor_99))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_110| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_110|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_106|) v_DerPreprocessor_98) |v_ULTIMATE.start_main_~p~0#1.offset_106| |v_ULTIMATE.start_main_~x~0#1_61|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_76|))))) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_76| (_ bv1 1)) |v_ULTIMATE.start_main_~p~0#1.base_110|)))))) is different from false [2021-11-21 01:05:00,806 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_100 (_ BitVec 32)) (v_DerPreprocessor_101 (_ BitVec 32)) (v_DerPreprocessor_102 (_ BitVec 32)) (v_DerPreprocessor_103 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_86| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_84| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_107| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_110| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_63| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_106| (_ BitVec 32)) (v_DerPreprocessor_98 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_108| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_61| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_76| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_77| (_ BitVec 32)) (v_DerPreprocessor_99 (_ BitVec 32))) (let ((.cse3 (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_77| (_ bv1 1)))) (or (bvsge (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_103)))) (store .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_77| (store (store (store (select .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_77|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_108|) v_DerPreprocessor_102) |v_ULTIMATE.start_main_~p~0#1.offset_108| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_86| (_ bv4 32)) v_DerPreprocessor_101))))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_76| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_76|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_107|) v_DerPreprocessor_100) |v_ULTIMATE.start_main_~p~0#1.offset_107| |v_ULTIMATE.start_main_~x~0#1_63|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_84| (_ bv4 32)) v_DerPreprocessor_99))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_110| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_110|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_106|) v_DerPreprocessor_98) |v_ULTIMATE.start_main_~p~0#1.offset_106| |v_ULTIMATE.start_main_~x~0#1_61|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_77|))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select .cse3 |v_ULTIMATE.start_main_~tail~0#1.base_76|))))))) (not (= (_ bv0 1) (bvneg (bvneg (select (store .cse3 |v_ULTIMATE.start_main_~tail~0#1.base_76| (_ bv1 1)) |v_ULTIMATE.start_main_~p~0#1.base_110|)))))))) is different from false [2021-11-21 01:05:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2021-11-21 01:05:02,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982094731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:02,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-21 01:05:02,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8] total 19 [2021-11-21 01:05:02,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512683262] [2021-11-21 01:05:02,202 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:02,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 01:05:02,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:02,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 01:05:02,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=118, Unknown=6, NotChecked=162, Total=342 [2021-11-21 01:05:02,203 INFO L87 Difference]: Start difference. First operand 106 states and 148 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:05:10,947 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~tail~0#1.base_73| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_73|) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_~tail~0#1.base_73| |c_ULTIMATE.start_main_~tail~0#1.base|)) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |v_ULTIMATE.start_main_~tail~0#1.base_73|)))) (forall ((v_DerPreprocessor_86 (_ BitVec 32)) (v_DerPreprocessor_87 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_105| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_87)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_105| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_105|) (_ bv4 32) v_DerPreprocessor_86) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_110| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_106| (_ BitVec 32)) (v_DerPreprocessor_98 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_99 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_99)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_110| (store (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_110|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_106|) v_DerPreprocessor_98) |v_ULTIMATE.start_main_~p~0#1.offset_106| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_110|)))))) (exists ((v_arrayElimCell_191 (_ BitVec 1))) (let ((.cse2 (bvneg (bvneg (bvneg v_arrayElimCell_191))))) (and (= (_ bv0 1) (bvadd .cse2 (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~list~0#1.base|)))) (= (_ bv0 1) (bvadd (bvneg .cse2) (_ bv1 1)))))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_main_~tail~0#1.base|))) (= |c_ULTIMATE.start_main_~list~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |c_ULTIMATE.start_main_~tail~0#1.base|))) is different from false [2021-11-21 01:05:11,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:11,568 INFO L93 Difference]: Finished difference Result 181 states and 251 transitions. [2021-11-21 01:05:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 01:05:11,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 01:05:11,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:11,570 INFO L225 Difference]: With dead ends: 181 [2021-11-21 01:05:11,570 INFO L226 Difference]: Without dead ends: 160 [2021-11-21 01:05:11,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=138, Invalid=344, Unknown=8, NotChecked=322, Total=812 [2021-11-21 01:05:11,571 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:11,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 115 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 114 Invalid, 0 Unknown, 345 Unchecked, 0.8s Time] [2021-11-21 01:05:11,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-21 01:05:11,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 122. [2021-11-21 01:05:11,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.4297520661157024) internal successors, (173), 121 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:05:11,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 173 transitions. [2021-11-21 01:05:11,586 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 173 transitions. Word has length 18 [2021-11-21 01:05:11,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:11,587 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 173 transitions. [2021-11-21 01:05:11,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:05:11,587 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 173 transitions. [2021-11-21 01:05:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:05:11,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:11,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:11,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:11,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:12,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:12,003 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:12,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:12,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1956847993, now seen corresponding path program 1 times [2021-11-21 01:05:12,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:12,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507446220] [2021-11-21 01:05:12,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:12,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:12,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:12,005 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:12,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-21 01:05:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:12,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:05:12,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:12,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-11-21 01:05:12,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2021-11-21 01:05:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:05:12,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:12,882 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-21 01:05:12,882 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 58 treesize of output 38 [2021-11-21 01:05:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:05:12,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:12,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507446220] [2021-11-21 01:05:12,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507446220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:12,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [684444392] [2021-11-21 01:05:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:12,929 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:12,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:05:12,945 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:05:12,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-21 01:05:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:13,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:05:13,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:13,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-11-21 01:05:13,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2021-11-21 01:05:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:05:13,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:14,047 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-21 01:05:14,047 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 58 treesize of output 38 [2021-11-21 01:05:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:05:14,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [684444392] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:14,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904581671] [2021-11-21 01:05:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:14,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:14,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:14,095 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:14,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-21 01:05:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:14,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:05:14,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:14,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:05:14,442 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-21 01:05:14,443 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 2 case distinctions, treesize of input 61 treesize of output 39 [2021-11-21 01:05:14,458 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-21 01:05:14,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2021-11-21 01:05:14,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:14,856 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-21 01:05:14,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 33 [2021-11-21 01:05:14,884 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-21 01:05:14,885 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2021-11-21 01:05:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:05:14,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:17,331 INFO L354 Elim1Store]: treesize reduction 86, result has 32.8 percent of original size [2021-11-21 01:05:17,331 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 2 case distinctions, treesize of input 62 treesize of output 62 [2021-11-21 01:05:17,391 INFO L354 Elim1Store]: treesize reduction 23, result has 50.0 percent of original size [2021-11-21 01:05:17,392 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 62 treesize of output 66 [2021-11-21 01:05:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:05:19,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904581671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:19,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:05:19,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 10, 6, 6] total 31 [2021-11-21 01:05:19,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171729552] [2021-11-21 01:05:19,688 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:19,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-21 01:05:19,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:19,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-21 01:05:19,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=777, Unknown=1, NotChecked=0, Total=930 [2021-11-21 01:05:19,690 INFO L87 Difference]: Start difference. First operand 122 states and 173 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:05:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:28,980 INFO L93 Difference]: Finished difference Result 445 states and 626 transitions. [2021-11-21 01:05:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-21 01:05:28,981 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-21 01:05:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:28,984 INFO L225 Difference]: With dead ends: 445 [2021-11-21 01:05:28,984 INFO L226 Difference]: Without dead ends: 399 [2021-11-21 01:05:28,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1184, Invalid=5295, Unknown=1, NotChecked=0, Total=6480 [2021-11-21 01:05:28,988 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 217 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:28,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 265 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 502 Invalid, 0 Unknown, 121 Unchecked, 2.4s Time] [2021-11-21 01:05:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-11-21 01:05:29,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 254. [2021-11-21 01:05:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.466403162055336) internal successors, (371), 253 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:05:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 371 transitions. [2021-11-21 01:05:29,028 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 371 transitions. Word has length 20 [2021-11-21 01:05:29,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:29,028 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 371 transitions. [2021-11-21 01:05:29,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:05:29,029 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 371 transitions. [2021-11-21 01:05:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:05:29,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:29,030 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:29,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:29,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:29,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:29,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:29,633 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:29,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:29,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1390343952, now seen corresponding path program 1 times [2021-11-21 01:05:29,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:29,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732098540] [2021-11-21 01:05:29,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:29,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:29,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:29,636 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:29,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-21 01:05:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:29,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:05:29,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:05:29,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:05:29,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:29,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732098540] [2021-11-21 01:05:29,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732098540] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:05:29,841 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:05:29,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 01:05:29,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924765664] [2021-11-21 01:05:29,841 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:05:29,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:05:29,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:29,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:05:29,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:05:29,842 INFO L87 Difference]: Start difference. First operand 254 states and 371 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:05:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:29,958 INFO L93 Difference]: Finished difference Result 453 states and 661 transitions. [2021-11-21 01:05:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:05:29,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-21 01:05:29,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:29,964 INFO L225 Difference]: With dead ends: 453 [2021-11-21 01:05:29,964 INFO L226 Difference]: Without dead ends: 228 [2021-11-21 01:05:29,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:05:29,966 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:29,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:05:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-21 01:05:29,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 182. [2021-11-21 01:05:29,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.3977900552486189) internal successors, (253), 181 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:05:29,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 253 transitions. [2021-11-21 01:05:29,985 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 253 transitions. Word has length 20 [2021-11-21 01:05:29,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:29,985 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 253 transitions. [2021-11-21 01:05:29,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:05:29,986 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 253 transitions. [2021-11-21 01:05:29,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:05:29,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:29,987 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:29,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:30,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:05:30,193 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:30,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:30,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1494005967, now seen corresponding path program 2 times [2021-11-21 01:05:30,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:30,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042499319] [2021-11-21 01:05:30,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:05:30,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:30,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:30,195 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:30,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-21 01:05:30,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:05:30,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:30,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 01:05:30,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:30,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:05:30,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:05:30,480 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:05:30,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-11-21 01:05:30,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:30,533 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-21 01:05:30,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-11-21 01:05:30,773 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-21 01:05:30,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-21 01:05:30,804 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-21 01:05:30,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 44 treesize of output 46 [2021-11-21 01:05:31,042 INFO L354 Elim1Store]: treesize reduction 93, result has 29.0 percent of original size [2021-11-21 01:05:31,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 67 [2021-11-21 01:05:31,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-21 01:05:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:05:31,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:33,517 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_111 (_ BitVec 32)) (v_DerPreprocessor_112 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_134| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_112)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_134| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_134|) (_ bv4 32) v_DerPreprocessor_111) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) is different from false [2021-11-21 01:05:35,982 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~tail~0#1.base_90| (_ BitVec 32)) (v_DerPreprocessor_111 (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_74| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_100| (_ BitVec 32)) (v_DerPreprocessor_112 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_134| (_ BitVec 32)) (v_DerPreprocessor_113 (_ BitVec 32)) (v_DerPreprocessor_114 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_131| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_114)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_90| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_90|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_131|) v_DerPreprocessor_113) |v_ULTIMATE.start_main_~p~0#1.offset_131| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_100| (_ bv4 32)) v_DerPreprocessor_112))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_134| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_134|) (_ bv4 32) v_DerPreprocessor_111) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_74|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_74| (_ bv20 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_90|)))) (bvslt |v_ULTIMATE.start_main_~x~0#1_74| (_ bv10 32)))) is different from false [2021-11-21 01:05:39,308 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_111 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_100| (_ BitVec 32)) (v_DerPreprocessor_112 (_ BitVec 32)) (v_DerPreprocessor_113 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_102| (_ BitVec 32)) (v_DerPreprocessor_114 (_ BitVec 32)) (v_DerPreprocessor_115 (_ BitVec 32)) (v_DerPreprocessor_116 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_132| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_131| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_90| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_91| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_74| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_134| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_76| (_ BitVec 32))) (or (bvsgt |v_ULTIMATE.start_main_~x~0#1_74| (_ bv20 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_91| (_ bv1 1)) |v_ULTIMATE.start_main_~tail~0#1.base_90|))))))) (bvslt |v_ULTIMATE.start_main_~x~0#1_74| (_ bv10 32)) (bvsge (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_116)))) (store .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_91| (store (store (store (select .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_91|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_132|) v_DerPreprocessor_115) |v_ULTIMATE.start_main_~p~0#1.offset_132| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_102| (_ bv4 32)) v_DerPreprocessor_114))))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_90| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_90|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_131|) v_DerPreprocessor_113) |v_ULTIMATE.start_main_~p~0#1.offset_131| |v_ULTIMATE.start_main_~x~0#1_76|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_100| (_ bv4 32)) v_DerPreprocessor_112))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_134| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_134|) (_ bv4 32) v_DerPreprocessor_111) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_74|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_91|)))))) is different from false [2021-11-21 01:05:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2021-11-21 01:05:40,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:40,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042499319] [2021-11-21 01:05:40,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042499319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:40,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [703755604] [2021-11-21 01:05:40,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:05:40,908 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:40,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:05:40,909 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:05:40,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-21 01:05:41,015 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:05:41,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087229024] [2021-11-21 01:05:41,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:05:41,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:41,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:41,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 1 [2021-11-21 01:05:41,017 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:41,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-21 01:05:41,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:05:41,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:41,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:05:41,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:41,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:05:41,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:05:41,231 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:05:41,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-21 01:05:41,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:41,289 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-21 01:05:41,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-11-21 01:05:41,517 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-21 01:05:41,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 80 [2021-11-21 01:05:41,576 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-21 01:05:41,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 69 [2021-11-21 01:05:42,312 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-21 01:05:42,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 101 [2021-11-21 01:05:42,361 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-21 01:05:42,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 77 [2021-11-21 01:05:42,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:05:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:05:42,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:44,583 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_123 (_ BitVec 32)) (v_DerPreprocessor_124 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_139| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_135| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_124)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_139| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_139|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_135|) v_DerPreprocessor_123) |v_ULTIMATE.start_main_~p~0#1.offset_135| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_139|))))))) is different from false [2021-11-21 01:05:46,897 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_123 (_ BitVec 32)) (v_DerPreprocessor_124 (_ BitVec 32)) (v_DerPreprocessor_125 (_ BitVec 32)) (v_DerPreprocessor_126 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_139| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_136| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_135| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_81| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_97| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_109| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_97| (_ bv1 1)) |v_ULTIMATE.start_main_~p~0#1.base_139|)))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_126)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_97| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_97|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_136|) v_DerPreprocessor_125) |v_ULTIMATE.start_main_~p~0#1.offset_136| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_109| (_ bv4 32)) v_DerPreprocessor_124))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_139| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_139|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_135|) v_DerPreprocessor_123) |v_ULTIMATE.start_main_~p~0#1.offset_135| |v_ULTIMATE.start_main_~x~0#1_81|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_97|))))))) is different from false [2021-11-21 01:05:49,917 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~tail~0#1.offset_111| (_ BitVec 32)) (v_DerPreprocessor_123 (_ BitVec 32)) (v_DerPreprocessor_124 (_ BitVec 32)) (v_DerPreprocessor_125 (_ BitVec 32)) (v_DerPreprocessor_126 (_ BitVec 32)) (v_DerPreprocessor_127 (_ BitVec 32)) (v_DerPreprocessor_128 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_139| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_136| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_135| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_137| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_81| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_97| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_83| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_98| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_109| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_98| (_ bv1 1)))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_98|)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select (store .cse0 |v_ULTIMATE.start_main_~tail~0#1.base_97| (_ bv1 1)) |v_ULTIMATE.start_main_~p~0#1.base_139|)))))))) (not (= (_ bv0 1) (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_main_~tail~0#1.base_97|))))) (bvsge (select (select (let ((.cse1 (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_128)))) (store .cse3 |v_ULTIMATE.start_main_~tail~0#1.base_98| (store (store (store (select .cse3 |v_ULTIMATE.start_main_~tail~0#1.base_98|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_137|) v_DerPreprocessor_127) |v_ULTIMATE.start_main_~p~0#1.offset_137| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_111| (_ bv4 32)) v_DerPreprocessor_126))))) (store .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_97| (store (store (store (select .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_97|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_136|) v_DerPreprocessor_125) |v_ULTIMATE.start_main_~p~0#1.offset_136| |v_ULTIMATE.start_main_~x~0#1_83|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_109| (_ bv4 32)) v_DerPreprocessor_124))))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_139| (store (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_139|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_135|) v_DerPreprocessor_123) |v_ULTIMATE.start_main_~p~0#1.offset_135| |v_ULTIMATE.start_main_~x~0#1_81|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32))))) is different from false [2021-11-21 01:05:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2021-11-21 01:05:51,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087229024] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:51,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-21 01:05:51,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8] total 19 [2021-11-21 01:05:51,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044436576] [2021-11-21 01:05:51,215 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:51,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 01:05:51,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:51,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 01:05:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=118, Unknown=6, NotChecked=162, Total=342 [2021-11-21 01:05:51,216 INFO L87 Difference]: Start difference. First operand 182 states and 253 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:05:58,618 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_DerPreprocessor_123 (_ BitVec 32)) (v_DerPreprocessor_124 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_139| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_135| (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_124)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_139| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_139|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_135|) v_DerPreprocessor_123) |v_ULTIMATE.start_main_~p~0#1.offset_135| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_139|))))))) (exists ((v_arrayElimCell_231 (_ BitVec 1)) (v_arrayElimCell_245 (_ BitVec 1))) (let ((.cse1 (bvneg (bvneg v_arrayElimCell_231))) (.cse2 (bvneg v_arrayElimCell_245))) (and (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg .cse1))) (= (_ bv0 1) (bvadd .cse2 (select |c_#valid| |c_ULTIMATE.start_main_~list~0#1.base|))) (= (_ bv0 1) (bvadd .cse1 .cse2))))) (forall ((v_DerPreprocessor_111 (_ BitVec 32)) (v_DerPreprocessor_112 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_134| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)) (bvsge (select (select (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_112)))) (store .cse3 |v_ULTIMATE.start_main_~p~0#1.base_134| (store (store (select .cse3 |v_ULTIMATE.start_main_~p~0#1.base_134|) (_ bv4 32) v_DerPreprocessor_111) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_main_~tail~0#1.base|))) (= |c_ULTIMATE.start_main_~list~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |c_ULTIMATE.start_main_~tail~0#1.base|)) (exists ((v_arrayElimCell_243 (_ BitVec 1)) (|v_ULTIMATE.start_main_~tail~0#1.base_94| (_ BitVec 32))) (let ((.cse4 (bvneg v_arrayElimCell_243))) (and (not (= |c_ULTIMATE.start_main_~list~0#1.base| |v_ULTIMATE.start_main_~tail~0#1.base_94|)) (= (_ bv0 1) (bvadd .cse4 (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_94|))) (not (= |v_ULTIMATE.start_main_~tail~0#1.base_94| |c_ULTIMATE.start_main_~tail~0#1.base|)) (= (_ bv0 1) (bvadd .cse4 (_ bv1 1))))))) is different from false [2021-11-21 01:05:59,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:59,049 INFO L93 Difference]: Finished difference Result 208 states and 287 transitions. [2021-11-21 01:05:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:05:59,051 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-21 01:05:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:59,053 INFO L225 Difference]: With dead ends: 208 [2021-11-21 01:05:59,054 INFO L226 Difference]: Without dead ends: 206 [2021-11-21 01:05:59,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=135, Invalid=305, Unknown=8, NotChecked=308, Total=756 [2021-11-21 01:05:59,055 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:59,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 87 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 51 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2021-11-21 01:05:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-21 01:05:59,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 190. [2021-11-21 01:05:59,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.4074074074074074) internal successors, (266), 189 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:05:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 266 transitions. [2021-11-21 01:05:59,071 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 266 transitions. Word has length 20 [2021-11-21 01:05:59,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:59,071 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 266 transitions. [2021-11-21 01:05:59,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:05:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 266 transitions. [2021-11-21 01:05:59,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:05:59,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:59,073 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:59,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:59,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-21 01:05:59,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:05:59,477 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:59,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:59,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1494004045, now seen corresponding path program 1 times [2021-11-21 01:05:59,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:59,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271693011] [2021-11-21 01:05:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:59,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:59,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:59,479 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:59,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-21 01:05:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:59,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 01:05:59,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:59,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:05:59,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:05:59,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:05:59,937 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-11-21 01:05:59,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 70 [2021-11-21 01:06:00,004 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:06:00,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-11-21 01:06:00,335 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-21 01:06:00,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 74 [2021-11-21 01:06:00,382 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-21 01:06:00,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 46 treesize of output 48 [2021-11-21 01:06:00,666 INFO L354 Elim1Store]: treesize reduction 93, result has 29.0 percent of original size [2021-11-21 01:06:00,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 67 [2021-11-21 01:06:00,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:06:00,982 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 49 treesize of output 37 [2021-11-21 01:06:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:06:01,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:03,194 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_145| (_ BitVec 32)) (v_DerPreprocessor_135 (_ BitVec 32)) (v_DerPreprocessor_136 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsle (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_136)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_145| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_145|) (_ bv4 32) v_DerPreprocessor_135) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv20 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) is different from false [2021-11-21 01:06:05,655 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_145| (_ BitVec 32)) (v_DerPreprocessor_135 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_104| (_ BitVec 32)) (v_DerPreprocessor_136 (_ BitVec 32)) (v_DerPreprocessor_137 (_ BitVec 32)) (v_DerPreprocessor_138 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_118| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_141| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_88| (_ BitVec 32))) (or (bvslt |v_ULTIMATE.start_main_~x~0#1_88| (_ bv10 32)) (bvsle (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_138)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_104| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_104|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_141|) v_DerPreprocessor_137) |v_ULTIMATE.start_main_~p~0#1.offset_141| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_118| (_ bv4 32)) v_DerPreprocessor_136))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_145| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_145|) (_ bv4 32) v_DerPreprocessor_135) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_88|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv20 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_88| (_ bv20 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_104|))))))))) is different from false [2021-11-21 01:06:09,071 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~tail~0#1.offset_120| (_ BitVec 32)) (v_DerPreprocessor_135 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_104| (_ BitVec 32)) (v_DerPreprocessor_136 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_105| (_ BitVec 32)) (v_DerPreprocessor_137 (_ BitVec 32)) (v_DerPreprocessor_138 (_ BitVec 32)) (v_DerPreprocessor_139 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_142| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_141| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_88| (_ BitVec 32)) (v_DerPreprocessor_140 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_145| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_118| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_90| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_105| (_ bv1 1)) |v_ULTIMATE.start_main_~tail~0#1.base_104|)))))))))) (bvslt |v_ULTIMATE.start_main_~x~0#1_88| (_ bv10 32)) (bvsle (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_140)))) (store .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_105| (store (store (store (select .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_105|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_142|) v_DerPreprocessor_139) |v_ULTIMATE.start_main_~p~0#1.offset_142| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_120| (_ bv4 32)) v_DerPreprocessor_138))))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_104| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_104|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_141|) v_DerPreprocessor_137) |v_ULTIMATE.start_main_~p~0#1.offset_141| |v_ULTIMATE.start_main_~x~0#1_90|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_118| (_ bv4 32)) v_DerPreprocessor_136))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_145| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_145|) (_ bv4 32) v_DerPreprocessor_135) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_88|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv20 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_88| (_ bv20 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_105|))))))) is different from false [2021-11-21 01:06:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2021-11-21 01:06:10,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:10,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271693011] [2021-11-21 01:06:10,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271693011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:10,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [736406132] [2021-11-21 01:06:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:10,620 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:06:10,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:06:10,621 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:06:10,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-21 01:06:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:10,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 01:06:10,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:10,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:06:10,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:06:10,909 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:06:10,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-21 01:06:10,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:10,961 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-21 01:06:10,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-11-21 01:06:11,174 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-21 01:06:11,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 75 [2021-11-21 01:06:11,204 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-21 01:06:11,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 47 treesize of output 49 [2021-11-21 01:06:11,373 INFO L354 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2021-11-21 01:06:11,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 51 [2021-11-21 01:06:11,457 INFO L354 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2021-11-21 01:06:11,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 64 [2021-11-21 01:06:11,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-21 01:06:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:06:11,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:13,821 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_146 (_ BitVec 32)) (v_DerPreprocessor_147 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_151| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsle (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_147)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_151| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_151|) (_ bv4 32) v_DerPreprocessor_146) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv20 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) is different from false [2021-11-21 01:06:16,350 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~tail~0#1.base_111| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_95| (_ BitVec 32)) (v_DerPreprocessor_146 (_ BitVec 32)) (v_DerPreprocessor_147 (_ BitVec 32)) (v_DerPreprocessor_148 (_ BitVec 32)) (v_DerPreprocessor_149 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_127| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_146| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_151| (_ BitVec 32))) (or (bvslt |v_ULTIMATE.start_main_~x~0#1_95| (_ bv10 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_95| (_ bv20 32)) (bvsle (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_149)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_111| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_111|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_146|) v_DerPreprocessor_148) |v_ULTIMATE.start_main_~p~0#1.offset_146| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_127| (_ bv4 32)) v_DerPreprocessor_147))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_151| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_151|) (_ bv4 32) v_DerPreprocessor_146) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_95|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv20 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_111|)))))) is different from false [2021-11-21 01:06:19,848 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~tail~0#1.base_111| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_112| (_ BitVec 32)) (v_DerPreprocessor_146 (_ BitVec 32)) (v_DerPreprocessor_147 (_ BitVec 32)) (v_DerPreprocessor_148 (_ BitVec 32)) (v_DerPreprocessor_149 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_127| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_147| (_ BitVec 32)) (v_DerPreprocessor_150 (_ BitVec 32)) (v_DerPreprocessor_151 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_146| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_95| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_97| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_129| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_151| (_ BitVec 32))) (or (bvslt |v_ULTIMATE.start_main_~x~0#1_95| (_ bv10 32)) (bvsgt |v_ULTIMATE.start_main_~x~0#1_95| (_ bv20 32)) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_112| (_ bv1 1)) |v_ULTIMATE.start_main_~tail~0#1.base_111|)))) (bvsle (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_151)))) (store .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_112| (store (store (store (select .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_112|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_147|) v_DerPreprocessor_150) |v_ULTIMATE.start_main_~p~0#1.offset_147| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_129| (_ bv4 32)) v_DerPreprocessor_149))))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_111| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_111|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_146|) v_DerPreprocessor_148) |v_ULTIMATE.start_main_~p~0#1.offset_146| |v_ULTIMATE.start_main_~x~0#1_97|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_127| (_ bv4 32)) v_DerPreprocessor_147))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_151| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_151|) (_ bv4 32) v_DerPreprocessor_146) (_ bv0 32) |v_ULTIMATE.start_main_~x~0#1_95|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv20 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_112|)))))) is different from false [2021-11-21 01:06:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2021-11-21 01:06:21,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [736406132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:21,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480373546] [2021-11-21 01:06:21,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:21,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:21,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:06:21,479 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:06:21,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-21 01:06:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:21,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:06:21,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:21,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:06:21,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:06:21,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:21,818 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-11-21 01:06:21,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 70 [2021-11-21 01:06:21,877 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:06:21,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-21 01:06:22,133 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-21 01:06:22,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 79 [2021-11-21 01:06:22,193 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-21 01:06:22,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 68 [2021-11-21 01:06:22,779 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-21 01:06:22,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 101 [2021-11-21 01:06:22,830 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-21 01:06:22,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 77 [2021-11-21 01:06:22,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:06:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:06:22,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:25,033 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_156| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_150| (_ BitVec 32)) (v_DerPreprocessor_158 (_ BitVec 32)) (v_DerPreprocessor_159 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_156|)))) (bvsle (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_159)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_156| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_156|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_150|) v_DerPreprocessor_158) |v_ULTIMATE.start_main_~p~0#1.offset_150| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv20 32)))) is different from false [2021-11-21 01:06:27,401 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_150| (_ BitVec 32)) (v_DerPreprocessor_158 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_136| (_ BitVec 32)) (v_DerPreprocessor_159 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_118| (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_151| (_ BitVec 32)) (v_DerPreprocessor_160 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (v_DerPreprocessor_161 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_156| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_102| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_118|))))) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_118| (_ bv1 1)) |v_ULTIMATE.start_main_~p~0#1.base_156|)))) (bvsle (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_161)))) (store .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_118| (store (store (store (select .cse1 |v_ULTIMATE.start_main_~tail~0#1.base_118|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_151|) v_DerPreprocessor_160) |v_ULTIMATE.start_main_~p~0#1.offset_151| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_136| (_ bv4 32)) v_DerPreprocessor_159))))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_156| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_156|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_150|) v_DerPreprocessor_158) |v_ULTIMATE.start_main_~p~0#1.offset_150| |v_ULTIMATE.start_main_~x~0#1_102|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv20 32)))) is different from false [2021-11-21 01:06:30,593 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.offset_150| (_ BitVec 32)) (v_DerPreprocessor_158 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_136| (_ BitVec 32)) (v_DerPreprocessor_159 (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.offset_138| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_118| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_152| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_151| (_ BitVec 32)) (v_DerPreprocessor_160 (_ BitVec 32)) (v_DerPreprocessor_161 (_ BitVec 32)) (v_DerPreprocessor_162 (_ BitVec 32)) (v_DerPreprocessor_163 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_156| (_ BitVec 32)) (|v_ULTIMATE.start_main_~tail~0#1.base_119| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_102| (_ BitVec 32)) (|v_ULTIMATE.start_main_~x~0#1_104| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_119| (_ bv1 1)))) (or (not (= (_ bv0 1) (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_main_~tail~0#1.base_118|))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_119|))))) (not (= (_ bv0 1) (bvneg (select (store .cse0 |v_ULTIMATE.start_main_~tail~0#1.base_118| (_ bv1 1)) |v_ULTIMATE.start_main_~p~0#1.base_156|)))) (bvsle (select (select (let ((.cse1 (let ((.cse2 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_163)))) (store .cse3 |v_ULTIMATE.start_main_~tail~0#1.base_119| (store (store (store (select .cse3 |v_ULTIMATE.start_main_~tail~0#1.base_119|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_152|) v_DerPreprocessor_162) |v_ULTIMATE.start_main_~p~0#1.offset_152| |ULTIMATE.start_main_~x~0#1|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_138| (_ bv4 32)) v_DerPreprocessor_161))))) (store .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_118| (store (store (store (select .cse2 |v_ULTIMATE.start_main_~tail~0#1.base_118|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_151|) v_DerPreprocessor_160) |v_ULTIMATE.start_main_~p~0#1.offset_151| |v_ULTIMATE.start_main_~x~0#1_104|) (bvadd |v_ULTIMATE.start_main_~tail~0#1.offset_136| (_ bv4 32)) v_DerPreprocessor_159))))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_156| (store (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_156|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_150|) v_DerPreprocessor_158) |v_ULTIMATE.start_main_~p~0#1.offset_150| |v_ULTIMATE.start_main_~x~0#1_102|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv20 32))))) is different from false [2021-11-21 01:06:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2021-11-21 01:06:32,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480373546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:32,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:06:32,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 23 [2021-11-21 01:06:32,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043136230] [2021-11-21 01:06:32,286 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:06:32,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 01:06:32,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:32,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 01:06:32,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=141, Unknown=9, NotChecked=288, Total=506 [2021-11-21 01:06:32,287 INFO L87 Difference]: Start difference. First operand 190 states and 266 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:06:43,152 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~tail~0#1.base_115| (_ BitVec 32))) (and (not (= |v_ULTIMATE.start_main_~tail~0#1.base_115| |c_ULTIMATE.start_main_~tail~0#1.base|)) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |v_ULTIMATE.start_main_~tail~0#1.base_115|)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~tail~0#1.base_115|)) (_ bv1 1))))) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_145| (_ BitVec 32)) (v_DerPreprocessor_135 (_ BitVec 32)) (v_DerPreprocessor_136 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsle (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_136)))) (store .cse0 |v_ULTIMATE.start_main_~p~0#1.base_145| (store (store (select .cse0 |v_ULTIMATE.start_main_~p~0#1.base_145|) (_ bv4 32) v_DerPreprocessor_135) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv20 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) (forall ((v_DerPreprocessor_146 (_ BitVec 32)) (v_DerPreprocessor_147 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_151| (_ BitVec 32))) (or (bvslt |ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (bvsle (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_147)))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_151| (store (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_151|) (_ bv4 32) v_DerPreprocessor_146) (_ bv0 32) |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv20 32)) (bvsgt |ULTIMATE.start_main_~x~0#1| (_ bv20 32)))) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_156| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_150| (_ BitVec 32)) (v_DerPreprocessor_158 (_ BitVec 32)) (v_DerPreprocessor_159 (_ BitVec 32)) (|ULTIMATE.start_main_~tail~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_156|)))) (bvsle (select (select (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) (bvadd |ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32)) v_DerPreprocessor_159)))) (store .cse2 |v_ULTIMATE.start_main_~p~0#1.base_156| (store (store (select .cse2 |v_ULTIMATE.start_main_~p~0#1.base_156|) (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_150|) v_DerPreprocessor_158) |v_ULTIMATE.start_main_~p~0#1.offset_150| |ULTIMATE.start_main_~x~0#1|))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv20 32)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv10 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_main_~tail~0#1.base|))) (= |c_ULTIMATE.start_main_~list~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~list~0#1.base| |c_ULTIMATE.start_main_~tail~0#1.base|)) (exists ((v_arrayElimCell_254 (_ BitVec 1)) (v_arrayElimCell_279 (_ BitVec 1))) (let ((.cse3 (bvneg v_arrayElimCell_279)) (.cse4 (bvneg (bvneg (bvneg v_arrayElimCell_254))))) (and (= (_ bv0 1) (bvadd .cse3 (select |c_#valid| |c_ULTIMATE.start_main_~list~0#1.base|))) (= (_ bv0 1) (bvadd (bvneg .cse4) (bvneg (bvneg .cse3)))) (= (_ bv0 1) (bvadd .cse4 (_ bv1 1))))))) is different from false [2021-11-21 01:06:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:43,729 INFO L93 Difference]: Finished difference Result 256 states and 358 transitions. [2021-11-21 01:06:43,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:06:43,736 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-21 01:06:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:43,737 INFO L225 Difference]: With dead ends: 256 [2021-11-21 01:06:43,737 INFO L226 Difference]: Without dead ends: 205 [2021-11-21 01:06:43,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 91 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 10 IntricatePredicates, 1 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=164, Invalid=371, Unknown=11, NotChecked=510, Total=1056 [2021-11-21 01:06:43,739 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:43,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 116 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 67 Invalid, 0 Unknown, 326 Unchecked, 0.6s Time] [2021-11-21 01:06:43,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-21 01:06:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 182. [2021-11-21 01:06:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.3977900552486189) internal successors, (253), 181 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:06:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 253 transitions. [2021-11-21 01:06:43,755 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 253 transitions. Word has length 20 [2021-11-21 01:06:43,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:43,755 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 253 transitions. [2021-11-21 01:06:43,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:06:43,756 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 253 transitions. [2021-11-21 01:06:43,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:06:43,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:43,757 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:06:43,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:43,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:44,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-21 01:06:44,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:44,360 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:44,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:44,361 INFO L85 PathProgramCache]: Analyzing trace with hash 232192162, now seen corresponding path program 2 times [2021-11-21 01:06:44,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:44,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128414511] [2021-11-21 01:06:44,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:06:44,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:44,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:44,362 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:44,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424cbd2e-4076-49cb-b00e-57498dfbd2bb/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-21 01:06:44,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:06:44,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:06:44,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 01:06:44,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:44,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-21 01:06:44,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:44,655 INFO L354 Elim1Store]: treesize reduction 60, result has 30.2 percent of original size [2021-11-21 01:06:44,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2021-11-21 01:06:44,691 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 20 treesize of output 16 [2021-11-21 01:06:44,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:06:44,773 INFO L354 Elim1Store]: treesize reduction 67, result has 22.1 percent of original size [2021-11-21 01:06:44,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 29 [2021-11-21 01:06:44,845 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:06:44,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-21 01:06:46,092 INFO L354 Elim1Store]: treesize reduction 307, result has 10.0 percent of original size [2021-11-21 01:06:46,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 371 treesize of output 241 [2021-11-21 01:06:46,346 INFO L354 Elim1Store]: treesize reduction 323, result has 9.0 percent of original size [2021-11-21 01:06:46,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 463 treesize of output 317 [2021-11-21 01:06:46,451 INFO L354 Elim1Store]: treesize reduction 482, result has 10.4 percent of original size [2021-11-21 01:06:46,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 216 [2021-11-21 01:06:46,487 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-11-21 01:06:46,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 154 treesize of output 166 [2021-11-21 01:06:47,133 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-21 01:06:47,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 187 treesize of output 172 [2021-11-21 01:06:47,217 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-11-21 01:06:47,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 107 [2021-11-21 01:06:47,289 INFO L354 Elim1Store]: treesize reduction 202, result has 16.5 percent of original size [2021-11-21 01:06:47,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 142 [2021-11-21 01:06:47,367 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-21 01:06:47,367 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 6 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 81 [2021-11-21 01:06:47,376 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-21 01:06:47,376 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 43 [2021-11-21 01:06:47,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-21 01:06:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:06:47,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:50,352 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_166 (_ BitVec 32)) (v_DerPreprocessor_167 (_ BitVec 32)) (v_DerPreprocessor_168 (_ BitVec 32)) (v_DerPreprocessor_169 (_ BitVec 32)) (v_DerPreprocessor_170 (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1| (_ BitVec 32)) (v_DerPreprocessor_171 (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.offset_157| (_ BitVec 32)) (|v_ULTIMATE.start_main_~p~0#1.base_163| (_ BitVec 32))) (or (bvsge (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~p~0#1.offset_157|)) (.cse4 (bvadd |c_ULTIMATE.start_main_~tail~0#1.offset| (_ bv4 32))) (.cse6 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse4 v_DerPreprocessor_169)))) (store .cse2 |v_ULTIMATE.start_main_~p~0#1.base_163| (store (store (select .cse2 |v_ULTIMATE.start_main_~p~0#1.base_163|) .cse3 v_DerPreprocessor_168) |v_ULTIMATE.start_main_~p~0#1.offset_157| |ULTIMATE.start_main_~x~0#1|))))) (store .cse0 |c_ULTIMATE.start_main_~list~0#1.base| (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~list~0#1.base|))) (store .cse1 |c_ULTIMATE.start_main_~list~0#1.offset| (bvadd (select .cse1 |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv1 32)))))) (select (store (select (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse4 |v_ULTIMATE.start_main_~p~0#1.base_163|)))) (store .cse5 |v_ULTIMATE.start_main_~p~0#1.base_163| (store (store (select .cse5 |v_ULTIMATE.start_main_~p~0#1.base_163|) .cse3 (_ bv0 32)) |v_ULTIMATE.start_main_~p~0#1.offset_157| v_DerPreprocessor_170))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset| v_DerPreprocessor_166) .cse6)) (select (store (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~tail~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~tail~0#1.base|) .cse4 |v_ULTIMATE.start_main_~p~0#1.offset_157|)))) (store .cse7 |v_ULTIMATE.start_main_~p~0#1.base_163| (store (store (select .cse7 |v_ULTIMATE.start_main_~p~0#1.base_163|) .cse3 (_ bv0 32)) |v_ULTIMATE.start_main_~p~0#1.offset_157| v_DerPreprocessor_171))) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset| v_DerPreprocessor_167) .cse6))) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~p~0#1.base_163|))))))) is different from false [2021-11-21 01:06:51,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:06:51,937 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 24747973 treesize of output 24480796 [2021-11-21 01:08:44,429 WARN L227 SmtUtils]: Spent 1.87m on a formula simplification that was a NOOP. DAG size: 947 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:10:37,239 WARN L227 SmtUtils]: Spent 1.88m on a formula simplification that was a NOOP. DAG size: 951 (called from [L 179] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate) [2021-11-21 01:12:28,965 WARN L227 SmtUtils]: Spent 1.86m on a formula simplification that was a NOOP. DAG size: 914 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)