./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 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/running_example.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8 --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-47ea020 [2021-11-07 01:29:52,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:29:52,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:29:52,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:29:52,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:29:52,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:29:52,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:29:52,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:29:52,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:29:52,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:29:52,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:29:52,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:29:52,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:29:52,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:29:52,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:29:52,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:29:52,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:29:52,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:29:52,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:29:52,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:29:52,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:29:52,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:29:52,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:29:52,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:29:52,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:29:52,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:29:52,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:29:52,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:29:52,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:29:52,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:29:52,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:29:52,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:29:52,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:29:52,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:29:52,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:29:52,564 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:29:52,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:29:52,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:29:52,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:29:52,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:29:52,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:29:52,567 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:29:52,593 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:29:52,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:29:52,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:29:52,594 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:29:52,595 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:29:52,595 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:29:52,595 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:29:52,595 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:29:52,595 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:29:52,596 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:29:52,596 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:29:52,596 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:29:52,596 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:29:52,596 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:29:52,597 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:29:52,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:29:52,597 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:29:52,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:29:52,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:29:52,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:29:52,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:29:52,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:29:52,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:29:52,599 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:29:52,599 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:29:52,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:29:52,599 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:29:52,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:29:52,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:29:52,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:29:52,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:29:52,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:29:52,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:29:52,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:29:52,601 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:29:52,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:29:52,601 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:29:52,601 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:29:52,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:29:52,602 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_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f [2021-11-07 01:29:52,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:29:52,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:29:52,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:29:52,894 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:29:52,895 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:29:52,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/heap-data/running_example.i [2021-11-07 01:29:53,006 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/data/79150d74d/358f6f79261e4304889071867c9902b8/FLAG31cf70b25 [2021-11-07 01:29:53,667 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:29:53,672 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/sv-benchmarks/c/heap-data/running_example.i [2021-11-07 01:29:53,703 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/data/79150d74d/358f6f79261e4304889071867c9902b8/FLAG31cf70b25 [2021-11-07 01:29:53,925 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/data/79150d74d/358f6f79261e4304889071867c9902b8 [2021-11-07 01:29:53,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:29:53,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:29:53,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:29:53,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:29:53,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:29:53,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:53" (1/1) ... [2021-11-07 01:29:53,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@113ecde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:53, skipping insertion in model container [2021-11-07 01:29:53,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:53" (1/1) ... [2021-11-07 01:29:53,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:29:54,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:29:54,380 WARN L228 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_96b923a1-7d78-4d5a-b52d-027e105f951e/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-11-07 01:29:54,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:29:54,405 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:29:54,473 WARN L228 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_96b923a1-7d78-4d5a-b52d-027e105f951e/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-11-07 01:29:54,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:29:54,504 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:29:54,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:54 WrapperNode [2021-11-07 01:29:54,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:29:54,506 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:29:54,506 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:29:54,506 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:29:54,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:54" (1/1) ... [2021-11-07 01:29:54,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:54" (1/1) ... [2021-11-07 01:29:54,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:29:54,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:29:54,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:29:54,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:29:54,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:54" (1/1) ... [2021-11-07 01:29:54,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:54" (1/1) ... [2021-11-07 01:29:54,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:54" (1/1) ... [2021-11-07 01:29:54,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:54" (1/1) ... [2021-11-07 01:29:54,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:54" (1/1) ... [2021-11-07 01:29:54,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:54" (1/1) ... [2021-11-07 01:29:54,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:54" (1/1) ... [2021-11-07 01:29:54,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:29:54,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:29:54,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:29:54,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:29:54,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:54" (1/1) ... [2021-11-07 01:29:54,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:29:54,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:29:54,651 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:29:54,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:29:54,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 01:29:54,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 01:29:54,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:29:54,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:29:54,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:29:54,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:29:54,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:29:54,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:29:54,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:29:55,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:29:55,240 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:29:55,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:55 BoogieIcfgContainer [2021-11-07 01:29:55,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:29:55,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:29:55,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:29:55,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:29:55,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:29:53" (1/3) ... [2021-11-07 01:29:55,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67be115b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:55, skipping insertion in model container [2021-11-07 01:29:55,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:54" (2/3) ... [2021-11-07 01:29:55,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67be115b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:55, skipping insertion in model container [2021-11-07 01:29:55,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:55" (3/3) ... [2021-11-07 01:29:55,262 INFO L111 eAbstractionObserver]: Analyzing ICFG running_example.i [2021-11-07 01:29:55,267 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:29:55,267 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:29:55,331 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:29:55,338 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 [2021-11-07 01:29:55,339 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:29:55,355 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) [2021-11-07 01:29:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:29:55,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:55,362 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:29:55,363 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:55,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:55,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1470856896, now seen corresponding path program 1 times [2021-11-07 01:29:55,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:29:55,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707570353] [2021-11-07 01:29:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:55,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:29:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:55,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:29:55,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707570353] [2021-11-07 01:29:55,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707570353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:55,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:55,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:29:55,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599353128] [2021-11-07 01:29:55,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:29:55,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:29:55,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:29:55,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:29:55,622 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) [2021-11-07 01:29:55,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:55,634 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2021-11-07 01:29:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:29:55,635 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 [2021-11-07 01:29:55,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:55,642 INFO L225 Difference]: With dead ends: 18 [2021-11-07 01:29:55,642 INFO L226 Difference]: Without dead ends: 11 [2021-11-07 01:29:55,644 INFO L786 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 [2021-11-07 01:29:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-07 01:29:55,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-07 01:29:55,670 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) [2021-11-07 01:29:55,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-11-07 01:29:55,672 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2021-11-07 01:29:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:55,673 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-11-07 01:29:55,673 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) [2021-11-07 01:29:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-11-07 01:29:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:29:55,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:55,675 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:55,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:29:55,676 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash 237321750, now seen corresponding path program 1 times [2021-11-07 01:29:55,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:29:55,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876917268] [2021-11-07 01:29:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:55,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:29:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:55,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:29:55,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876917268] [2021-11-07 01:29:55,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876917268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:55,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:55,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:29:55,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902876640] [2021-11-07 01:29:55,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:29:55,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:29:55,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:29:55,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:29:55,845 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) [2021-11-07 01:29:55,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:55,960 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-11-07 01:29:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:29:55,961 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 [2021-11-07 01:29:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:55,962 INFO L225 Difference]: With dead ends: 22 [2021-11-07 01:29:55,963 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 01:29:55,965 INFO L786 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 [2021-11-07 01:29:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 01:29:55,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-07 01:29:55,975 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) [2021-11-07 01:29:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-07 01:29:55,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 8 [2021-11-07 01:29:55,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:55,978 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-07 01:29:55,978 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) [2021-11-07 01:29:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-07 01:29:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 01:29:55,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:55,983 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:55,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:29:55,988 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:55,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:55,989 INFO L85 PathProgramCache]: Analyzing trace with hash 540596448, now seen corresponding path program 1 times [2021-11-07 01:29:55,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:29:55,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625610796] [2021-11-07 01:29:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:55,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:29:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:56,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:29:56,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625610796] [2021-11-07 01:29:56,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625610796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:29:56,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011560293] [2021-11-07 01:29:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:56,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:29:56,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:29:56,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:29:56,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:29:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:56,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:29:56,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:56,405 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 [2021-11-07 01:29:56,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:56,418 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 [2021-11-07 01:29:56,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:56,429 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 [2021-11-07 01:29:56,743 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:29:56,745 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:29:56,752 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 [2021-11-07 01:29:56,759 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 47 treesize of output 43 [2021-11-07 01:29:56,764 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:29:56,765 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-11-07 01:29:56,770 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 28 treesize of output 24 [2021-11-07 01:29:56,775 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 14 treesize of output 10 [2021-11-07 01:29:56,776 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-07 01:29:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:56,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:56,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-07 01:29:56,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1436608329] [2021-11-07 01:29:56,879 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-07 01:29:56,879 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:29:56,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:29:56,890 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:29:56,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:29:56,929 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:29:56,931 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:29:56,932 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:29:56,933 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:29:56,933 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:29:56,934 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:29:56,935 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:29:56,938 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:29:56,939 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:29:56,940 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:29:56,941 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:29:56,942 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:29:56,942 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-11-07 01:29:56,945 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:29:56,946 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:29:56,947 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:29:56,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:29:56,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-07 01:29:56,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:29:56,950 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:29:56,951 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:29:56,952 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:29:56,953 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:29:56,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-11-07 01:29:56,955 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-11-07 01:29:56,955 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:29:56,956 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:29:56,957 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-07 01:29:56,960 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 199 [2021-11-07 01:29:56,972 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4a67267b 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.computeCostEstimation(ElimStorePlain.java:571) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.doElimAllRec(ElimStorePlain.java:444) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:242) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:402) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:228) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) 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:609) 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) [2021-11-07 01:29:56,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:29:56,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-07 01:29:56,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224881509] [2021-11-07 01:29:56,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:29:56,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:29:56,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:29:56,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:29:56,976 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) [2021-11-07 01:29:56,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:29:57,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:57,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:29:57,198 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@4a67267b 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:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) 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.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) 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:869) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) 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) [2021-11-07 01:29:57,201 INFO L168 Benchmark]: Toolchain (without parser) took 3271.02 ms. Allocated memory is still 136.3 MB. Free memory was 100.4 MB in the beginning and 69.9 MB in the end (delta: 30.5 MB). Peak memory consumption was 28.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:29:57,202 INFO L168 Benchmark]: CDTParser took 1.17 ms. Allocated memory is still 90.2 MB. Free memory was 62.4 MB in the beginning and 62.4 MB in the end (delta: 32.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:29:57,202 INFO L168 Benchmark]: CACSL2BoogieTranslator took 569.10 ms. Allocated memory is still 136.3 MB. Free memory was 100.3 MB in the beginning and 105.6 MB in the end (delta: -5.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:29:57,203 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.93 ms. Allocated memory is still 136.3 MB. Free memory was 105.6 MB in the beginning and 103.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:29:57,203 INFO L168 Benchmark]: Boogie Preprocessor took 53.00 ms. Allocated memory is still 136.3 MB. Free memory was 103.5 MB in the beginning and 102.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:29:57,204 INFO L168 Benchmark]: RCFGBuilder took 636.33 ms. Allocated memory is still 136.3 MB. Free memory was 102.2 MB in the beginning and 86.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:29:57,205 INFO L168 Benchmark]: TraceAbstraction took 1951.21 ms. Allocated memory is still 136.3 MB. Free memory was 85.4 MB in the beginning and 69.9 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:29:57,209 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.17 ms. Allocated memory is still 90.2 MB. Free memory was 62.4 MB in the beginning and 62.4 MB in the end (delta: 32.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 569.10 ms. Allocated memory is still 136.3 MB. Free memory was 100.3 MB in the beginning and 105.6 MB in the end (delta: -5.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.93 ms. Allocated memory is still 136.3 MB. Free memory was 105.6 MB in the beginning and 103.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.00 ms. Allocated memory is still 136.3 MB. Free memory was 103.5 MB in the beginning and 102.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 636.33 ms. Allocated memory is still 136.3 MB. Free memory was 102.2 MB in the beginning and 86.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1951.21 ms. Allocated memory is still 136.3 MB. Free memory was 85.4 MB in the beginning and 69.9 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4a67267b de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4a67267b: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-07 01:29:57,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/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_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/running_example.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8 --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-47ea020 [2021-11-07 01:30:00,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:30:00,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:30:00,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:30:00,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:30:00,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:30:00,202 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:30:00,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:30:00,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:30:00,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:30:00,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:30:00,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:30:00,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:30:00,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:30:00,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:30:00,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:30:00,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:30:00,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:30:00,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:30:00,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:30:00,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:30:00,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:30:00,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:30:00,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:30:00,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:30:00,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:30:00,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:30:00,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:30:00,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:30:00,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:30:00,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:30:00,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:30:00,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:30:00,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:30:00,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:30:00,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:30:00,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:30:00,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:30:00,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:30:00,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:30:00,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:30:00,303 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:30:00,357 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:30:00,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:30:00,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:30:00,359 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:30:00,360 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:30:00,360 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:30:00,360 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:30:00,360 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:30:00,362 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:30:00,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:30:00,365 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:30:00,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:30:00,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:30:00,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:30:00,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:30:00,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:30:00,367 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:30:00,367 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:30:00,367 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:30:00,368 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:30:00,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:30:00,368 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:30:00,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:30:00,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:30:00,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:30:00,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:30:00,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:30:00,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:30:00,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:30:00,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:30:00,371 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:30:00,371 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:00,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:30:00,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:30:00,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:30:00,372 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_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 318c7aa22aeecc0174739978e9fb15d261281003454726c8705d95a97106063f [2021-11-07 01:30:00,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:30:00,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:30:00,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:30:00,825 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:30:00,826 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:30:00,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/heap-data/running_example.i [2021-11-07 01:30:00,919 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/data/32b2c67a8/ae90d8562af94c0b83a11d3b257bc3dc/FLAG9b4c6d8df [2021-11-07 01:30:01,648 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:30:01,648 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/sv-benchmarks/c/heap-data/running_example.i [2021-11-07 01:30:01,672 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/data/32b2c67a8/ae90d8562af94c0b83a11d3b257bc3dc/FLAG9b4c6d8df [2021-11-07 01:30:01,860 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/data/32b2c67a8/ae90d8562af94c0b83a11d3b257bc3dc [2021-11-07 01:30:01,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:30:01,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:30:01,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:01,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:30:01,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:30:01,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:01" (1/1) ... [2021-11-07 01:30:01,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@755fe9b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:01, skipping insertion in model container [2021-11-07 01:30:01,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:01" (1/1) ... [2021-11-07 01:30:01,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:30:01,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:30:02,307 WARN L228 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_96b923a1-7d78-4d5a-b52d-027e105f951e/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-11-07 01:30:02,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:02,334 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:30:02,414 WARN L228 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_96b923a1-7d78-4d5a-b52d-027e105f951e/sv-benchmarks/c/heap-data/running_example.i[23610,23623] [2021-11-07 01:30:02,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:02,457 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:30:02,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:02 WrapperNode [2021-11-07 01:30:02,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:02,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:30:02,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:30:02,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:30:02,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:02" (1/1) ... [2021-11-07 01:30:02,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:02" (1/1) ... [2021-11-07 01:30:02,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:30:02,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:30:02,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:30:02,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:30:02,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:02" (1/1) ... [2021-11-07 01:30:02,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:02" (1/1) ... [2021-11-07 01:30:02,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:02" (1/1) ... [2021-11-07 01:30:02,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:02" (1/1) ... [2021-11-07 01:30:02,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:02" (1/1) ... [2021-11-07 01:30:02,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:02" (1/1) ... [2021-11-07 01:30:02,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:02" (1/1) ... [2021-11-07 01:30:02,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:30:02,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:30:02,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:30:02,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:30:02,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:02" (1/1) ... [2021-11-07 01:30:02,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:30:02,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:30:02,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:30:02,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:30:02,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:30:02,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:30:02,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:30:02,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:30:02,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:30:02,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:30:02,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:30:02,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:30:02,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:30:03,138 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:30:03,139 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:30:03,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:03 BoogieIcfgContainer [2021-11-07 01:30:03,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:30:03,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:30:03,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:30:03,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:30:03,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:30:01" (1/3) ... [2021-11-07 01:30:03,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c755a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:03, skipping insertion in model container [2021-11-07 01:30:03,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:02" (2/3) ... [2021-11-07 01:30:03,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c755a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:03, skipping insertion in model container [2021-11-07 01:30:03,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:03" (3/3) ... [2021-11-07 01:30:03,151 INFO L111 eAbstractionObserver]: Analyzing ICFG running_example.i [2021-11-07 01:30:03,157 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:30:03,157 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:30:03,233 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:30:03,240 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 [2021-11-07 01:30:03,240 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:30:03,257 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) [2021-11-07 01:30:03,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:30:03,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:03,263 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:03,264 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:03,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:03,271 INFO L85 PathProgramCache]: Analyzing trace with hash 508893296, now seen corresponding path program 1 times [2021-11-07 01:30:03,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:03,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794467424] [2021-11-07 01:30:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:03,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:03,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:03,290 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:03,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:30:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:03,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:30:03,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:03,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:03,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:03,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794467424] [2021-11-07 01:30:03,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794467424] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:03,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:03,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:30:03,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950559919] [2021-11-07 01:30:03,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:30:03,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:03,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:30:03,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:30:03,529 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) [2021-11-07 01:30:03,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:03,546 INFO L93 Difference]: Finished difference Result 26 states and 42 transitions. [2021-11-07 01:30:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:30:03,548 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 [2021-11-07 01:30:03,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:03,557 INFO L225 Difference]: With dead ends: 26 [2021-11-07 01:30:03,557 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 01:30:03,560 INFO L786 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 [2021-11-07 01:30:03,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 01:30:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-07 01:30:03,593 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) [2021-11-07 01:30:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2021-11-07 01:30:03,596 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 8 [2021-11-07 01:30:03,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:03,597 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-11-07 01:30:03,597 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) [2021-11-07 01:30:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2021-11-07 01:30:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:30:03,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:03,598 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:03,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:03,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:03,814 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:03,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:03,815 INFO L85 PathProgramCache]: Analyzing trace with hash 307872697, now seen corresponding path program 1 times [2021-11-07 01:30:03,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:03,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661871904] [2021-11-07 01:30:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:03,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:03,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:03,818 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:03,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:30:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:03,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:30:03,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:04,010 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 [2021-11-07 01:30:04,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-07 01:30:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:04,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:04,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:04,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661871904] [2021-11-07 01:30:04,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661871904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:04,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:04,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 01:30:04,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033299232] [2021-11-07 01:30:04,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:30:04,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:04,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:30:04,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:30:04,287 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) [2021-11-07 01:30:05,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:05,045 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2021-11-07 01:30:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:30:05,047 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 [2021-11-07 01:30:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:05,050 INFO L225 Difference]: With dead ends: 52 [2021-11-07 01:30:05,050 INFO L226 Difference]: Without dead ends: 43 [2021-11-07 01:30:05,052 INFO L786 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 [2021-11-07 01:30:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-07 01:30:05,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2021-11-07 01:30:05,060 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) [2021-11-07 01:30:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 41 transitions. [2021-11-07 01:30:05,062 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 41 transitions. Word has length 9 [2021-11-07 01:30:05,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:05,062 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 41 transitions. [2021-11-07 01:30:05,063 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) [2021-11-07 01:30:05,063 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 41 transitions. [2021-11-07 01:30:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 01:30:05,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:05,073 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:05,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:05,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:05,289 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:05,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:05,290 INFO L85 PathProgramCache]: Analyzing trace with hash -44654956, now seen corresponding path program 1 times [2021-11-07 01:30:05,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:05,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948612949] [2021-11-07 01:30:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:05,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:05,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:05,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:05,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:30:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:05,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:30:05,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:05,452 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 [2021-11-07 01:30:05,461 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 [2021-11-07 01:30:05,661 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:05,665 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-11-07 01:30:05,680 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:05,685 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-11-07 01:30:05,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:05,792 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-11-07 01:30:05,793 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 59 treesize of output 51 [2021-11-07 01:30:05,815 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:30:05,816 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 23 treesize of output 23 [2021-11-07 01:30:05,950 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 [2021-11-07 01:30:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:05,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:06,062 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:06,066 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:30:06,071 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:06,074 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:30:08,137 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_18 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_18 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_4)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_18 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_18) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_18) v_DerPreprocessor_3) v_ULTIMATE.start_main_~p~0.offset_18 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_18)))))) is different from false [2021-11-07 01:30:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-07 01:30:08,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:08,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948612949] [2021-11-07 01:30:08,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948612949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:08,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1282434577] [2021-11-07 01:30:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:08,309 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:08,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:30:08,319 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:30:08,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 01:30:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:08,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:30:08,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:08,640 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 [2021-11-07 01:30:08,658 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 [2021-11-07 01:30:08,795 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:08,801 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-11-07 01:30:08,807 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:08,811 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-11-07 01:30:08,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:08,941 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-11-07 01:30:08,942 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 59 treesize of output 51 [2021-11-07 01:30:08,961 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:30:08,961 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 23 treesize of output 23 [2021-11-07 01:30:09,055 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 [2021-11-07 01:30:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:09,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:09,123 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:09,125 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:30:09,129 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:09,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:30:11,195 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_21 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_21 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_21))))) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_8)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_21 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_21) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_21) v_DerPreprocessor_7) v_ULTIMATE.start_main_~p~0.offset_21 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-11-07 01:30:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-07 01:30:11,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1282434577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:11,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15673140] [2021-11-07 01:30:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:11,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:30:11,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:30:11,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:30:11,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 01:30:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:11,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:30:11,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:11,502 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 [2021-11-07 01:30:11,521 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 [2021-11-07 01:30:11,643 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:11,644 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-11-07 01:30:11,650 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:11,651 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-07 01:30:11,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:11,768 INFO L354 Elim1Store]: treesize reduction 152, result has 14.6 percent of original size [2021-11-07 01:30:11,769 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 62 treesize of output 54 [2021-11-07 01:30:11,785 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:30:11,786 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 26 treesize of output 26 [2021-11-07 01:30:11,869 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 [2021-11-07 01:30:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:11,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:11,940 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:11,942 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:30:11,946 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:11,948 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:30:14,006 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_24 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_24 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_12)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_24 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_24) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_24) v_DerPreprocessor_11) v_ULTIMATE.start_main_~p~0.offset_24 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_24))))))) is different from false [2021-11-07 01:30:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-07 01:30:14,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15673140] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:14,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:30:14,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-11-07 01:30:14,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390721580] [2021-11-07 01:30:14,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:30:14,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:14,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:30:14,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=42, Unknown=3, NotChecked=42, Total=110 [2021-11-07 01:30:14,151 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) [2021-11-07 01:30:15,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:15,463 INFO L93 Difference]: Finished difference Result 69 states and 97 transitions. [2021-11-07 01:30:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:30:15,465 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 [2021-11-07 01:30:15,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:15,466 INFO L225 Difference]: With dead ends: 69 [2021-11-07 01:30:15,467 INFO L226 Difference]: Without dead ends: 60 [2021-11-07 01:30:15,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=82, Invalid=137, Unknown=3, NotChecked=84, Total=306 [2021-11-07 01:30:15,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-07 01:30:15,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2021-11-07 01:30:15,472 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) [2021-11-07 01:30:15,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2021-11-07 01:30:15,474 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 12 [2021-11-07 01:30:15,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:15,477 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2021-11-07 01:30:15,477 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) [2021-11-07 01:30:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2021-11-07 01:30:15,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:30:15,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:15,479 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:15,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:15,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:15,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:16,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:16,084 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:16,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:16,085 INFO L85 PathProgramCache]: Analyzing trace with hash -893074814, now seen corresponding path program 1 times [2021-11-07 01:30:16,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:16,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298300628] [2021-11-07 01:30:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:16,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:16,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:16,087 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:16,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:30:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:16,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:30:16,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:16,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:16,216 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 [2021-11-07 01:30:16,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:16,230 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 [2021-11-07 01:30:16,438 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 23 treesize of output 11 [2021-11-07 01:30:16,448 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 23 treesize of output 11 [2021-11-07 01:30:16,473 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 [2021-11-07 01:30:16,478 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 [2021-11-07 01:30:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:16,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:16,606 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:16,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-07 01:30:16,611 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:16,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-07 01:30:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:16,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:16,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298300628] [2021-11-07 01:30:16,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298300628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:16,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [710457192] [2021-11-07 01:30:16,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:16,806 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:16,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:30:16,812 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:30:16,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:30:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:17,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:30:17,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:17,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,058 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 [2021-11-07 01:30:17,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,068 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 [2021-11-07 01:30:17,230 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 23 treesize of output 11 [2021-11-07 01:30:17,242 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 23 treesize of output 11 [2021-11-07 01:30:17,275 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 [2021-11-07 01:30:17,280 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 [2021-11-07 01:30:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:17,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:17,360 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:17,361 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-07 01:30:17,365 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:17,367 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-07 01:30:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:17,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [710457192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:17,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512700161] [2021-11-07 01:30:17,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:17,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:30:17,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:30:17,516 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:30:17,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 01:30:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:17,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:30:17,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:17,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,745 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 [2021-11-07 01:30:17,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-11-07 01:30:17,940 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 23 treesize of output 11 [2021-11-07 01:30:17,951 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 23 treesize of output 11 [2021-11-07 01:30:17,981 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 [2021-11-07 01:30:17,987 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 [2021-11-07 01:30:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:18,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:18,053 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:18,054 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-07 01:30:18,061 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:18,062 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-07 01:30:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:18,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512700161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:18,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:30:18,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 7 [2021-11-07 01:30:18,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997870974] [2021-11-07 01:30:18,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:30:18,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:18,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:30:18,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:30:18,202 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) [2021-11-07 01:30:18,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:18,870 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2021-11-07 01:30:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:30:18,871 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 [2021-11-07 01:30:18,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:18,873 INFO L225 Difference]: With dead ends: 68 [2021-11-07 01:30:18,873 INFO L226 Difference]: Without dead ends: 59 [2021-11-07 01:30:18,873 INFO L786 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 [2021-11-07 01:30:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-07 01:30:18,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-11-07 01:30:18,884 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) [2021-11-07 01:30:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2021-11-07 01:30:18,886 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 15 [2021-11-07 01:30:18,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:18,887 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2021-11-07 01:30:18,887 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) [2021-11-07 01:30:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2021-11-07 01:30:18,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:30:18,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:18,889 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:18,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:19,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-07 01:30:19,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 01:30:19,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:19,492 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:19,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1000926759, now seen corresponding path program 2 times [2021-11-07 01:30:19,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:19,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550915499] [2021-11-07 01:30:19,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:30:19,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:19,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:19,496 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:19,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:30:19,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:30:19,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:30:19,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:30:19,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:19,785 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 [2021-11-07 01:30:19,798 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 [2021-11-07 01:30:19,936 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:30:19,937 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 19 [2021-11-07 01:30:19,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:19,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:30:19,955 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:19,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-11-07 01:30:19,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:19,989 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-07 01:30:19,989 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 [2021-11-07 01:30:20,079 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:20,081 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-07 01:30:20,085 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:20,086 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:30:20,213 INFO L354 Elim1Store]: treesize reduction 93, result has 29.0 percent of original size [2021-11-07 01:30:20,213 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 [2021-11-07 01:30:20,435 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 [2021-11-07 01:30:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:20,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:20,582 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:20,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-07 01:30:20,587 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:20,589 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-07 01:30:22,654 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_39 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_24)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_39 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_39) (_ bv4 32) v_DerPreprocessor_23) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)))) is different from false [2021-11-07 01:30:22,817 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:22,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-11-07 01:30:22,823 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:22,825 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-11-07 01:30:25,151 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0_16 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_22 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_40 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_23 (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_DerPreprocessor_25 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_39 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32)) (v_DerPreprocessor_26 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_22))))) (bvsgt v_ULTIMATE.start_main_~x~0_16 (_ bv20 32)) (bvslt v_ULTIMATE.start_main_~x~0_16 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_26)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_22 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_22) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_40) v_DerPreprocessor_25) v_ULTIMATE.start_main_~p~0.offset_40 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_23) v_DerPreprocessor_24))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_39 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_39) (_ bv4 32) v_DerPreprocessor_23) (_ bv0 32) v_ULTIMATE.start_main_~x~0_16))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-11-07 01:30:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-07 01:30:25,887 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:25,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550915499] [2021-11-07 01:30:25,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550915499] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:25,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1158043020] [2021-11-07 01:30:25,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:30:25,888 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:25,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:30:25,892 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:30:25,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:30:26,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:30:26,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503512309] [2021-11-07 01:30:26,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:30:26,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:30:26,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:30:26,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 1 [2021-11-07 01:30:26,265 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:30:26,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 01:30:26,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:30:26,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:30:26,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:30:26,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:26,571 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 [2021-11-07 01:30:26,585 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 [2021-11-07 01:30:26,722 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:30:26,723 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 [2021-11-07 01:30:26,752 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:26,753 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:30:26,758 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:26,759 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-11-07 01:30:26,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:26,798 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-07 01:30:26,798 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 [2021-11-07 01:30:27,012 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:27,013 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-07 01:30:27,019 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:27,021 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-11-07 01:30:27,177 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-07 01:30:27,178 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 [2021-11-07 01:30:27,217 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-07 01:30:27,218 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 [2021-11-07 01:30:27,362 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 [2021-11-07 01:30:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:27,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:27,439 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:27,440 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:30:27,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:27,446 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:30:29,510 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_43 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_43 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_32)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_43 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_43) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_43) v_DerPreprocessor_31) v_ULTIMATE.start_main_~p~0.offset_43 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_43)))))) is different from false [2021-11-07 01:30:29,631 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:29,637 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-07 01:30:29,642 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:29,644 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-07 01:30:31,857 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_29 (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_27 (_ BitVec 32)) (v_DerPreprocessor_33 (_ BitVec 32)) (v_DerPreprocessor_34 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_44 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_43 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_43 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_20 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_27))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_34)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_27 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_27) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_44) v_DerPreprocessor_33) v_ULTIMATE.start_main_~p~0.offset_44 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_29) v_DerPreprocessor_32))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_43 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_43) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_43) v_DerPreprocessor_31) v_ULTIMATE.start_main_~p~0.offset_43 v_ULTIMATE.start_main_~x~0_20))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_27 (_ bv1 1)) v_ULTIMATE.start_main_~p~0.base_43)))))))) is different from false [2021-11-07 01:30:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-07 01:30:32,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503512309] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:32,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:30:32,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 16 [2021-11-07 01:30:32,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098209963] [2021-11-07 01:30:32,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:30:32,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:32,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:30:32,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=99, Unknown=4, NotChecked=92, Total=240 [2021-11-07 01:30:32,305 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) [2021-11-07 01:30:34,730 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)))) (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_39 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_24)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_39 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_39) (_ bv4 32) v_DerPreprocessor_23) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)))) (not (bvslt .cse1 (_ bv10 32))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (not (bvsgt .cse1 (_ bv20 32))) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_43 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_43 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_32)))) (store .cse2 v_ULTIMATE.start_main_~p~0.base_43 (store (store (select .cse2 v_ULTIMATE.start_main_~p~0.base_43) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_43) v_DerPreprocessor_31) v_ULTIMATE.start_main_~p~0.offset_43 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_43)))))) (exists ((v_arrayElimCell_32 (_ BitVec 1))) (let ((.cse3 (bvneg v_arrayElimCell_32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg .cse3)) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse3 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base)))))))) is different from false [2021-11-07 01:30:36,794 WARN L838 $PredicateComparison]: unable to prove that (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_24 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_39 (_ BitVec 32)) (v_DerPreprocessor_23 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_24)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_39 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_39) (_ bv4 32) v_DerPreprocessor_23) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)))) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_31 (_ BitVec 32)) (v_DerPreprocessor_32 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_43 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_43 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_32)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_43 (store (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_43) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_43) v_DerPreprocessor_31) v_ULTIMATE.start_main_~p~0.offset_43 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_43)))))) (exists ((v_arrayElimCell_32 (_ BitVec 1))) (let ((.cse2 (bvneg v_arrayElimCell_32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg .cse2)) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse2 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base))))))) is different from false [2021-11-07 01:30:37,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:37,944 INFO L93 Difference]: Finished difference Result 144 states and 206 transitions. [2021-11-07 01:30:37,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:30:37,946 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 [2021-11-07 01:30:37,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:37,948 INFO L225 Difference]: With dead ends: 144 [2021-11-07 01:30:37,948 INFO L226 Difference]: Without dead ends: 127 [2021-11-07 01:30:37,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=129, Invalid=269, Unknown=6, NotChecked=246, Total=650 [2021-11-07 01:30:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-07 01:30:37,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 75. [2021-11-07 01:30:37,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 states have internal predecessors, (108), 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) [2021-11-07 01:30:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 108 transitions. [2021-11-07 01:30:37,965 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 108 transitions. Word has length 15 [2021-11-07 01:30:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:37,966 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 108 transitions. [2021-11-07 01:30:37,966 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) [2021-11-07 01:30:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 108 transitions. [2021-11-07 01:30:37,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:30:37,968 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:37,968 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:37,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:38,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:38,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:30:38,372 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:38,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:38,373 INFO L85 PathProgramCache]: Analyzing trace with hash -128474150, now seen corresponding path program 1 times [2021-11-07 01:30:38,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:38,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291099645] [2021-11-07 01:30:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:38,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:38,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:38,384 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:38,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:30:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:38,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:30:38,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:38,615 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 [2021-11-07 01:30:38,684 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 [2021-11-07 01:30:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:30:38,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:30:38,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:38,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291099645] [2021-11-07 01:30:38,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291099645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:38,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:38,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:30:38,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21456447] [2021-11-07 01:30:38,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:30:38,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:38,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:30:38,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:30:38,851 INFO L87 Difference]: Start difference. First operand 75 states and 108 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) [2021-11-07 01:30:39,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:39,481 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2021-11-07 01:30:39,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:30:39,482 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 [2021-11-07 01:30:39,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:39,483 INFO L225 Difference]: With dead ends: 87 [2021-11-07 01:30:39,483 INFO L226 Difference]: Without dead ends: 77 [2021-11-07 01:30:39,484 INFO L786 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 [2021-11-07 01:30:39,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-07 01:30:39,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-11-07 01:30:39,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 74 states have internal predecessors, (106), 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) [2021-11-07 01:30:39,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2021-11-07 01:30:39,498 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 17 [2021-11-07 01:30:39,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:39,498 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2021-11-07 01:30:39,498 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) [2021-11-07 01:30:39,499 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2021-11-07 01:30:39,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:30:39,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:39,500 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:39,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:39,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:39,701 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:39,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1524987734, now seen corresponding path program 1 times [2021-11-07 01:30:39,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:39,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045253035] [2021-11-07 01:30:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:39,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:39,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:39,705 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:39,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:30:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:40,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:30:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:40,037 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 [2021-11-07 01:30:40,060 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 [2021-11-07 01:30:40,214 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:30:40,214 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 18 treesize of output 18 [2021-11-07 01:30:40,223 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:40,224 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:30:40,227 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:40,228 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-11-07 01:30:40,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:40,257 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-07 01:30:40,257 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 [2021-11-07 01:30:40,384 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:40,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-07 01:30:40,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:40,390 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:30:40,549 INFO L354 Elim1Store]: treesize reduction 93, result has 29.0 percent of original size [2021-11-07 01:30:40,550 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 [2021-11-07 01:30:40,719 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 [2021-11-07 01:30:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:30:40,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:40,875 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:40,877 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-07 01:30:40,885 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:40,886 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-07 01:30:42,949 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_51 (_ BitVec 32)) (v_DerPreprocessor_40 (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_40)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_51 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_51) (_ bv4 32) v_DerPreprocessor_39) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-11-07 01:30:43,209 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:43,210 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-07 01:30:43,215 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:43,216 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-07 01:30:45,597 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~x~0_26 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_33 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_51 (_ BitVec 32)) (v_DerPreprocessor_42 (_ BitVec 32)) (v_DerPreprocessor_40 (_ BitVec 32)) (v_DerPreprocessor_41 (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_36 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_52 (_ BitVec 32))) (or (bvslt v_ULTIMATE.start_main_~x~0_26 (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_33)))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_42)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_33 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_33) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_52) v_DerPreprocessor_41) v_ULTIMATE.start_main_~p~0.offset_52 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_36) v_DerPreprocessor_40))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_51 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_51) (_ bv4 32) v_DerPreprocessor_39) (_ bv0 32) v_ULTIMATE.start_main_~x~0_26))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt v_ULTIMATE.start_main_~x~0_26 (_ bv20 32)))) is different from false [2021-11-07 01:30:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2021-11-07 01:30:46,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:46,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045253035] [2021-11-07 01:30:46,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045253035] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:46,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1492351519] [2021-11-07 01:30:46,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:46,203 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:46,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:30:46,220 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:30:46,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 01:30:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:30:46,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:46,673 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 [2021-11-07 01:30:46,687 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 [2021-11-07 01:30:46,794 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:30:46,794 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 [2021-11-07 01:30:46,805 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:46,807 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:30:46,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:46,812 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-11-07 01:30:46,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:46,843 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-07 01:30:46,844 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 [2021-11-07 01:30:46,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:46,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-07 01:30:46,975 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:46,976 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:30:47,105 INFO L354 Elim1Store]: treesize reduction 93, result has 29.0 percent of original size [2021-11-07 01:30:47,106 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 [2021-11-07 01:30:47,244 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 [2021-11-07 01:30:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:30:47,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:47,324 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:47,326 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-07 01:30:47,329 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:47,330 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-07 01:30:49,396 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_47 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_DerPreprocessor_48 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_55 (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_48)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_55 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_55) (_ bv4 32) v_DerPreprocessor_47) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-11-07 01:30:49,606 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:49,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-07 01:30:49,612 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:49,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-07 01:30:51,956 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_50 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_56 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_42 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_38 (_ BitVec 32)) (v_DerPreprocessor_47 (_ BitVec 32)) (v_DerPreprocessor_48 (_ BitVec 32)) (v_DerPreprocessor_49 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_55 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_31 (_ BitVec 32))) (or (bvsgt v_ULTIMATE.start_main_~x~0_31 (_ bv20 32)) (bvslt v_ULTIMATE.start_main_~x~0_31 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_50)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_38 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_38) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_56) v_DerPreprocessor_49) v_ULTIMATE.start_main_~p~0.offset_56 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_42) v_DerPreprocessor_48))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_55 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_55) (_ bv4 32) v_DerPreprocessor_47) (_ bv0 32) v_ULTIMATE.start_main_~x~0_31))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_38)))))))) is different from false [2021-11-07 01:30:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2021-11-07 01:30:52,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1492351519] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:52,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836329172] [2021-11-07 01:30:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:52,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:30:52,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:30:52,632 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:30:52,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 01:30:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:52,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:30:52,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:52,997 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 [2021-11-07 01:30:53,008 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 [2021-11-07 01:30:53,139 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:30:53,139 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 [2021-11-07 01:30:53,170 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:53,172 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:30:53,176 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:53,177 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-11-07 01:30:53,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:53,206 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-07 01:30:53,207 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 [2021-11-07 01:30:53,461 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:53,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-11-07 01:30:53,466 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:53,468 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-11-07 01:30:53,608 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-07 01:30:53,609 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 78 treesize of output 70 [2021-11-07 01:30:53,643 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-07 01:30:53,643 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 42 treesize of output 44 [2021-11-07 01:30:53,766 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 [2021-11-07 01:30:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:30:53,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:53,829 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:53,830 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:30:53,832 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:53,833 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:30:55,876 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_59 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_55 (_ BitVec 32)) (v_DerPreprocessor_56 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_59 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_56)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_59 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_59) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_59) v_DerPreprocessor_55) v_ULTIMATE.start_main_~p~0.offset_59 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_59)))))) is different from false [2021-11-07 01:30:56,086 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:56,093 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-11-07 01:30:56,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:30:56,098 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-11-07 01:30:58,301 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_59 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_43 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_36 (_ BitVec 32)) (v_DerPreprocessor_57 (_ BitVec 32)) (v_DerPreprocessor_58 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_60 (_ BitVec 32)) (v_DerPreprocessor_55 (_ BitVec 32)) (v_DerPreprocessor_56 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_59 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_48 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_43 (_ bv1 1)) v_ULTIMATE.start_main_~p~0.base_59)))))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_43)))))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_58)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_43 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_43) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_60) v_DerPreprocessor_57) v_ULTIMATE.start_main_~p~0.offset_60 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_48) v_DerPreprocessor_56))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_59 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_59) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_59) v_DerPreprocessor_55) v_ULTIMATE.start_main_~p~0.offset_59 v_ULTIMATE.start_main_~x~0_36))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-11-07 01:30:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2021-11-07 01:30:58,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836329172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:58,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:30:58,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 18 [2021-11-07 01:30:58,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391157553] [2021-11-07 01:30:58,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:30:58,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:58,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:30:58,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=101, Unknown=6, NotChecked=150, Total=306 [2021-11-07 01:30:58,714 INFO L87 Difference]: Start difference. First operand 75 states and 106 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) [2021-11-07 01:31:01,148 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)))) (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (exists ((v_arrayElimCell_51 (_ BitVec 1))) (let ((.cse0 (bvneg v_arrayElimCell_51))) (and (= (_ bv0 1) (bvadd (bvneg .cse0) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse0 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base)))))) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_51 (_ BitVec 32)) (v_DerPreprocessor_40 (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_40)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_51 (store (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_51) (_ bv4 32) v_DerPreprocessor_39) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (not (bvslt .cse2 (_ bv10 32))) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_47 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_DerPreprocessor_48 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_55 (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_48)))) (store .cse3 v_ULTIMATE.start_main_~p~0.base_55 (store (store (select .cse3 v_ULTIMATE.start_main_~p~0.base_55) (_ bv4 32) v_DerPreprocessor_47) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (forall ((v_ULTIMATE.start_main_~p~0.offset_59 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_55 (_ BitVec 32)) (v_DerPreprocessor_56 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_59 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvsge (select (select (let ((.cse4 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_56)))) (store .cse4 v_ULTIMATE.start_main_~p~0.base_59 (store (store (select .cse4 v_ULTIMATE.start_main_~p~0.base_59) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_59) v_DerPreprocessor_55) v_ULTIMATE.start_main_~p~0.offset_59 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_59)))))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (not (bvsgt .cse2 (_ bv20 32))))) is different from false [2021-11-07 01:31:03,220 WARN L838 $PredicateComparison]: unable to prove that (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (exists ((v_arrayElimCell_51 (_ BitVec 1))) (let ((.cse0 (bvneg v_arrayElimCell_51))) (and (= (_ bv0 1) (bvadd (bvneg .cse0) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse0 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base)))))) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_51 (_ BitVec 32)) (v_DerPreprocessor_40 (_ BitVec 32)) (v_DerPreprocessor_39 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_40)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_51 (store (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_51) (_ bv4 32) v_DerPreprocessor_39) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_47 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_DerPreprocessor_48 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_55 (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_48)))) (store .cse2 v_ULTIMATE.start_main_~p~0.base_55 (store (store (select .cse2 v_ULTIMATE.start_main_~p~0.base_55) (_ bv4 32) v_DerPreprocessor_47) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (forall ((v_ULTIMATE.start_main_~p~0.offset_59 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_55 (_ BitVec 32)) (v_DerPreprocessor_56 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_59 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvsge (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_56)))) (store .cse3 v_ULTIMATE.start_main_~p~0.base_59 (store (store (select .cse3 v_ULTIMATE.start_main_~p~0.base_59) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_59) v_DerPreprocessor_55) v_ULTIMATE.start_main_~p~0.offset_59 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_59))))))) is different from false [2021-11-07 01:31:03,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:03,984 INFO L93 Difference]: Finished difference Result 155 states and 217 transitions. [2021-11-07 01:31:03,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:31:03,986 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 [2021-11-07 01:31:03,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:03,987 INFO L225 Difference]: With dead ends: 155 [2021-11-07 01:31:03,987 INFO L226 Difference]: Without dead ends: 146 [2021-11-07 01:31:03,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=133, Invalid=271, Unknown=8, NotChecked=344, Total=756 [2021-11-07 01:31:03,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-07 01:31:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 73. [2021-11-07 01:31:04,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 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) [2021-11-07 01:31:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 102 transitions. [2021-11-07 01:31:04,003 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 102 transitions. Word has length 17 [2021-11-07 01:31:04,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:04,004 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 102 transitions. [2021-11-07 01:31:04,004 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) [2021-11-07 01:31:04,004 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 102 transitions. [2021-11-07 01:31:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:31:04,005 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:04,005 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:04,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:04,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:04,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:04,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:04,620 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:04,620 INFO L85 PathProgramCache]: Analyzing trace with hash -668283619, now seen corresponding path program 1 times [2021-11-07 01:31:04,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:04,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567586588] [2021-11-07 01:31:04,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:04,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:04,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:04,622 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:04,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:31:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:04,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:31:04,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:04,990 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 [2021-11-07 01:31:05,272 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-07 01:31:05,273 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 115 treesize of output 93 [2021-11-07 01:31:05,279 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 114 treesize of output 110 [2021-11-07 01:31:05,358 INFO L354 Elim1Store]: treesize reduction 174, result has 12.6 percent of original size [2021-11-07 01:31:05,359 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 117 treesize of output 83 [2021-11-07 01:31:05,381 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-07 01:31:05,382 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 104 treesize of output 104 [2021-11-07 01:31:06,003 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-11-07 01:31:06,004 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 3 case distinctions, treesize of input 140 treesize of output 110 [2021-11-07 01:31:06,056 INFO L354 Elim1Store]: treesize reduction 87, result has 17.9 percent of original size [2021-11-07 01:31:06,056 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 [2021-11-07 01:31:06,136 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-07 01:31:06,137 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 3 case distinctions, treesize of input 108 treesize of output 84 [2021-11-07 01:31:06,194 INFO L354 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2021-11-07 01:31:06,195 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 111 treesize of output 66 [2021-11-07 01:31:06,204 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 01:31:06,205 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 57 treesize of output 32 [2021-11-07 01:31:06,278 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 [2021-11-07 01:31:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:06,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:06,408 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:06,413 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-07 01:31:06,425 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:06,425 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-07 01:31:06,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:06,742 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 351 treesize of output 350 [2021-11-07 01:31:06,748 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:06,751 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 540 [2021-11-07 01:31:09,456 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-11-07 01:31:09,457 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 540 treesize of output 358 [2021-11-07 01:31:09,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:09,580 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 350 treesize of output 356 [2021-11-07 01:31:09,596 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:09,603 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 546 [2021-11-07 01:31:12,581 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-11-07 01:31:12,582 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 546 treesize of output 364 [2021-11-07 01:31:12,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:12,660 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 356 treesize of output 362 [2021-11-07 01:31:12,679 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-07 01:31:12,765 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 [2021-11-07 01:31:13,082 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 [2021-11-07 01:31:13,533 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 [2021-11-07 01:31:13,725 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 [2021-11-07 01:31:13,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:13,831 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 [2021-11-07 01:31:14,061 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 [2021-11-07 01:31:14,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:14,384 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 [2021-11-07 01:31:14,530 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 [2021-11-07 01:31:16,015 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-07 01:31:16,074 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 [2021-11-07 01:31:16,167 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 [2021-11-07 01:31:21,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:21,004 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 110 treesize of output 122 [2021-11-07 01:31:21,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:21,998 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 147 treesize of output 167 [2021-11-07 01:31:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:22,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:22,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567586588] [2021-11-07 01:31:22,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567586588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:22,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [924084086] [2021-11-07 01:31:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:22,864 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:22,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:31:22,873 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:31:22,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 01:31:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:23,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:31:23,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:23,395 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 [2021-11-07 01:31:23,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:31:23,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:23,582 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-07 01:31:23,582 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 111 treesize of output 89 [2021-11-07 01:31:23,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:31:23,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:23,606 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-07 01:31:23,607 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 89 treesize of output 67 [2021-11-07 01:31:23,613 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 88 treesize of output 78 [2021-11-07 01:31:23,636 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-07 01:31:23,636 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 85 treesize of output 85 [2021-11-07 01:31:24,244 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 01:31:24,244 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 109 treesize of output 100 [2021-11-07 01:31:24,283 INFO L354 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2021-11-07 01:31:24,284 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 94 treesize of output 81 [2021-11-07 01:31:24,294 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 01:31:24,295 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 77 treesize of output 55 [2021-11-07 01:31:24,345 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 01:31:24,345 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 [2021-11-07 01:31:24,352 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 01:31:24,352 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 [2021-11-07 01:31:24,473 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 [2021-11-07 01:31:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:24,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:24,530 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:24,531 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-07 01:31:24,533 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:24,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-07 01:31:24,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:24,831 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 654 treesize of output 623 [2021-11-07 01:31:24,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:24,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1049 [2021-11-07 01:31:25,041 INFO L354 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2021-11-07 01:31:25,042 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 1049 treesize of output 622 [2021-11-07 01:31:25,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,189 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 614 treesize of output 604 [2021-11-07 01:31:25,209 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,219 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1030 [2021-11-07 01:31:25,449 INFO L354 Elim1Store]: treesize reduction 51, result has 48.5 percent of original size [2021-11-07 01:31:25,449 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 1030 treesize of output 612 [2021-11-07 01:31:25,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:25,550 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 604 treesize of output 594 [2021-11-07 01:31:25,577 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-07 01:31:26,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:26,100 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 31 treesize of output 35 [2021-11-07 01:31:26,185 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 [2021-11-07 01:31:26,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:26,578 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 [2021-11-07 01:31:26,658 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 [2021-11-07 01:31:27,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:27,489 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 541 treesize of output 525 [2021-11-07 01:31:27,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:27,549 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 655 treesize of output 643 [2021-11-07 01:31:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:29,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [924084086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:29,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997547903] [2021-11-07 01:31:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:29,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:31:29,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:31:29,994 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:31:29,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 01:31:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:30,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:31:30,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:30,447 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 [2021-11-07 01:31:30,684 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-07 01:31:30,684 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 2 case distinctions, treesize of input 116 treesize of output 94 [2021-11-07 01:31:30,700 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 [2021-11-07 01:31:30,749 INFO L354 Elim1Store]: treesize reduction 150, result has 14.3 percent of original size [2021-11-07 01:31:30,750 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 [2021-11-07 01:31:30,767 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-07 01:31:30,768 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 [2021-11-07 01:31:31,313 INFO L354 Elim1Store]: treesize reduction 71, result has 17.4 percent of original size [2021-11-07 01:31:31,314 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 122 treesize of output 105 [2021-11-07 01:31:31,347 INFO L354 Elim1Store]: treesize reduction 65, result has 16.7 percent of original size [2021-11-07 01:31:31,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 83 [2021-11-07 01:31:31,378 INFO L354 Elim1Store]: treesize reduction 57, result has 16.2 percent of original size [2021-11-07 01:31:31,378 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 90 treesize of output 72 [2021-11-07 01:31:31,431 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-07 01:31:31,431 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 [2021-11-07 01:31:31,439 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 01:31:31,439 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 [2021-11-07 01:31:31,470 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 38 treesize of output 22 [2021-11-07 01:31:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:31,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:31,519 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:31,520 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-07 01:31:31,522 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:31,522 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-07 01:31:31,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:31,868 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 349 treesize of output 348 [2021-11-07 01:31:31,877 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:31,882 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 538 [2021-11-07 01:31:37,115 WARN L207 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-11-07 01:31:37,116 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-11-07 01:31:37,116 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 538 treesize of output 356 [2021-11-07 01:31:37,126 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:37,129 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 538 [2021-11-07 01:31:39,328 INFO L354 Elim1Store]: treesize reduction 78, result has 39.1 percent of original size [2021-11-07 01:31:39,328 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 538 treesize of output 356 [2021-11-07 01:31:39,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:39,396 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 348 treesize of output 354 [2021-11-07 01:31:39,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:39,463 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 354 treesize of output 360 [2021-11-07 01:31:39,477 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-07 01:31:39,601 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 [2021-11-07 01:31:39,774 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 [2021-11-07 01:31:40,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:40,073 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 38 treesize of output 42 [2021-11-07 01:31:40,286 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 [2021-11-07 01:31:40,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:40,658 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 [2021-11-07 01:31:40,727 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 [2021-11-07 01:31:44,786 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 [2021-11-07 01:31:56,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:56,366 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 192 treesize of output 196 [2021-11-07 01:31:57,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:31:57,693 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 219 treesize of output 227 [2021-11-07 01:32:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:00,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997547903] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:00,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:32:00,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 8, 7, 8] total 19 [2021-11-07 01:32:00,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693050483] [2021-11-07 01:32:00,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 01:32:00,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:00,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 01:32:00,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:32:00,632 INFO L87 Difference]: Start difference. First operand 73 states and 102 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 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) [2021-11-07 01:32:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:04,256 INFO L93 Difference]: Finished difference Result 133 states and 185 transitions. [2021-11-07 01:32:04,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:32:04,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 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 [2021-11-07 01:32:04,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:04,259 INFO L225 Difference]: With dead ends: 133 [2021-11-07 01:32:04,259 INFO L226 Difference]: Without dead ends: 115 [2021-11-07 01:32:04,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:32:04,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-07 01:32:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2021-11-07 01:32:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.4) internal successors, (126), 90 states have internal predecessors, (126), 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) [2021-11-07 01:32:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 126 transitions. [2021-11-07 01:32:04,284 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 126 transitions. Word has length 18 [2021-11-07 01:32:04,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:04,285 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 126 transitions. [2021-11-07 01:32:04,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 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) [2021-11-07 01:32:04,285 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 126 transitions. [2021-11-07 01:32:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:32:04,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:04,287 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:04,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-07 01:32:04,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:04,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:04,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:04,904 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:32:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:04,905 INFO L85 PathProgramCache]: Analyzing trace with hash -776135564, now seen corresponding path program 3 times [2021-11-07 01:32:04,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:04,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051572040] [2021-11-07 01:32:04,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:32:04,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:04,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:04,913 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:04,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:32:05,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 01:32:05,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:32:05,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 01:32:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:05,451 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 [2021-11-07 01:32:05,459 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 [2021-11-07 01:32:05,564 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:05,565 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:32:05,569 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:05,570 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-11-07 01:32:05,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,741 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-11-07 01:32:05,741 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 [2021-11-07 01:32:05,837 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:32:05,837 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 22 treesize of output 29 [2021-11-07 01:32:05,997 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:05,998 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-11-07 01:32:06,002 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:06,003 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-11-07 01:32:06,125 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-07 01:32:06,125 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 [2021-11-07 01:32:06,163 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-07 01:32:06,163 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 [2021-11-07 01:32:06,277 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:06,278 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-07 01:32:06,281 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:06,282 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-07 01:32:06,418 INFO L354 Elim1Store]: treesize reduction 93, result has 29.0 percent of original size [2021-11-07 01:32:06,418 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 [2021-11-07 01:32:06,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-07 01:32:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:06,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:06,722 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:06,723 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-07 01:32:06,725 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:06,726 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-07 01:32:08,771 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_77 (_ BitVec 32)) (v_DerPreprocessor_78 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_78 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_78)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_78 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_78) (_ bv4 32) v_DerPreprocessor_77) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)))) is different from false [2021-11-07 01:32:08,890 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:08,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-11-07 01:32:08,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:08,898 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 109 [2021-11-07 01:32:11,221 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_80 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_79 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_46 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_64 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_58 (_ BitVec 32)) (v_DerPreprocessor_79 (_ BitVec 32)) (v_DerPreprocessor_77 (_ BitVec 32)) (v_DerPreprocessor_78 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_78 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt v_ULTIMATE.start_main_~x~0_46 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_80)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_58 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_58) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_79) v_DerPreprocessor_79) v_ULTIMATE.start_main_~p~0.offset_79 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_64) v_DerPreprocessor_78))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_78 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_78) (_ bv4 32) v_DerPreprocessor_77) (_ bv0 32) v_ULTIMATE.start_main_~x~0_46))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt v_ULTIMATE.start_main_~x~0_46 (_ bv20 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_58))))))) is different from false [2021-11-07 01:32:11,792 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:11,793 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-07 01:32:11,802 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:11,803 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 234 [2021-11-07 01:32:14,584 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_79 (_ BitVec 32)) (v_DerPreprocessor_82 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_48 (_ BitVec 32)) (v_DerPreprocessor_80 (_ BitVec 32)) (v_DerPreprocessor_81 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_46 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_80 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_64 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_58 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_59 (_ BitVec 32)) (v_DerPreprocessor_79 (_ BitVec 32)) (v_DerPreprocessor_77 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_66 (_ BitVec 32)) (v_DerPreprocessor_78 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_78 (_ BitVec 32))) (or (bvslt v_ULTIMATE.start_main_~x~0_46 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_82)))) (store .cse2 v_ULTIMATE.start_main_~tail~0.base_59 (store (store (store (select .cse2 v_ULTIMATE.start_main_~tail~0.base_59) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_80) v_DerPreprocessor_81) v_ULTIMATE.start_main_~p~0.offset_80 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_66) v_DerPreprocessor_80))))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_58 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_58) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_79) v_DerPreprocessor_79) v_ULTIMATE.start_main_~p~0.offset_79 v_ULTIMATE.start_main_~x~0_48) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_64) v_DerPreprocessor_78))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_78 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_78) (_ bv4 32) v_DerPreprocessor_77) (_ bv0 32) v_ULTIMATE.start_main_~x~0_46))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_59 (_ bv1 1)) v_ULTIMATE.start_main_~tail~0.base_58)))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_59)))))) (bvsgt v_ULTIMATE.start_main_~x~0_46 (_ bv20 32)))) is different from false [2021-11-07 01:32:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2021-11-07 01:32:16,359 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:16,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051572040] [2021-11-07 01:32:16,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051572040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:16,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1980678673] [2021-11-07 01:32:16,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:32:16,361 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:16,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:32:16,376 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:32:16,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:32:17,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:32:17,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057521628] [2021-11-07 01:32:17,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:32:17,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:32:17,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:32:17,061 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:32:17,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 1 [2021-11-07 01:32:17,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 01:32:18,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 01:32:18,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:32:18,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 01:32:18,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:18,648 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 [2021-11-07 01:32:18,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:32:18,760 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:18,760 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:32:18,784 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:18,785 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-11-07 01:32:18,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:18,963 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-11-07 01:32:18,963 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 [2021-11-07 01:32:19,033 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:32:19,033 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 [2021-11-07 01:32:19,175 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:19,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-11-07 01:32:19,180 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:19,181 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-07 01:32:19,310 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-07 01:32:19,310 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 90 treesize of output 82 [2021-11-07 01:32:19,367 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-07 01:32:19,367 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 54 treesize of output 71 [2021-11-07 01:32:19,842 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:19,843 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-07 01:32:19,849 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:19,856 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-07 01:32:19,983 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-07 01:32:19,983 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 117 treesize of output 109 [2021-11-07 01:32:20,031 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-07 01:32:20,031 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 81 treesize of output 85 [2021-11-07 01:32:20,153 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 [2021-11-07 01:32:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:20,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:20,212 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:20,213 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:32:20,215 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:20,216 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:32:22,266 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.base_83 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_83 (_ BitVec 32)) (v_DerPreprocessor_89 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_DerPreprocessor_90 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_83))))) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_90)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_83 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_83) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_83) v_DerPreprocessor_89) v_ULTIMATE.start_main_~p~0.offset_83 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-11-07 01:32:22,393 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:22,395 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-07 01:32:22,399 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:22,400 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-07 01:32:24,681 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_84 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_52 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_83 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_DerPreprocessor_90 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_65 (_ BitVec 32)) (v_DerPreprocessor_91 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_83 (_ BitVec 32)) (v_DerPreprocessor_92 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_73 (_ BitVec 32)) (v_DerPreprocessor_89 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_92)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_65 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_65) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_84) v_DerPreprocessor_91) v_ULTIMATE.start_main_~p~0.offset_84 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_73) v_DerPreprocessor_90))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_83 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_83) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_83) v_DerPreprocessor_89) v_ULTIMATE.start_main_~p~0.offset_83 v_ULTIMATE.start_main_~x~0_52))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_65))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_65 (_ bv1 1)) v_ULTIMATE.start_main_~p~0.base_83)))))))) is different from false [2021-11-07 01:32:25,109 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:25,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-11-07 01:32:25,114 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:25,115 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 245 [2021-11-07 01:32:27,819 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_84 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_52 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_83 (_ BitVec 32)) (v_DerPreprocessor_90 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_54 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_85 (_ BitVec 32)) (v_DerPreprocessor_93 (_ BitVec 32)) (v_DerPreprocessor_94 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_65 (_ BitVec 32)) (v_DerPreprocessor_91 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_83 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_66 (_ BitVec 32)) (v_DerPreprocessor_92 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_75 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_73 (_ BitVec 32)) (v_DerPreprocessor_89 (_ BitVec 32))) (let ((.cse3 (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_66 (_ bv1 1)))) (or (bvsge (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_94)))) (store .cse2 v_ULTIMATE.start_main_~tail~0.base_66 (store (store (store (select .cse2 v_ULTIMATE.start_main_~tail~0.base_66) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_85) v_DerPreprocessor_93) v_ULTIMATE.start_main_~p~0.offset_85 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_75) v_DerPreprocessor_92))))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_65 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_65) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_84) v_DerPreprocessor_91) v_ULTIMATE.start_main_~p~0.offset_84 v_ULTIMATE.start_main_~x~0_54) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_73) v_DerPreprocessor_90))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_83 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_83) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_83) v_DerPreprocessor_89) v_ULTIMATE.start_main_~p~0.offset_83 v_ULTIMATE.start_main_~x~0_52))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse3 v_ULTIMATE.start_main_~tail~0.base_65)))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_66)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select (store .cse3 v_ULTIMATE.start_main_~tail~0.base_65 (_ bv1 1)) v_ULTIMATE.start_main_~p~0.base_83))))))))))) is different from false [2021-11-07 01:32:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2021-11-07 01:32:29,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057521628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:29,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:32:29,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8] total 19 [2021-11-07 01:32:29,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507049040] [2021-11-07 01:32:29,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 01:32:29,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:29,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 01:32:29,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=118, Unknown=6, NotChecked=162, Total=342 [2021-11-07 01:32:29,503 INFO L87 Difference]: Start difference. First operand 91 states and 126 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) [2021-11-07 01:32:36,954 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)))) (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_77 (_ BitVec 32)) (v_DerPreprocessor_78 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_78 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_78)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_78 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_78) (_ bv4 32) v_DerPreprocessor_77) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (forall ((v_ULTIMATE.start_main_~p~0.base_83 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_83 (_ BitVec 32)) (v_DerPreprocessor_89 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_DerPreprocessor_90 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_83))))) (bvsge (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_90)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_83 (store (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_83) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_83) v_DerPreprocessor_89) v_ULTIMATE.start_main_~p~0.offset_83 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (not (bvslt .cse2 (_ bv10 32))) (exists ((v_arrayElimCell_180 (_ BitVec 1)) (v_ULTIMATE.start_main_~tail~0.base_62 (_ BitVec 32))) (let ((.cse3 (bvneg v_arrayElimCell_180))) (and (not (= c_ULTIMATE.start_main_~tail~0.base v_ULTIMATE.start_main_~tail~0.base_62)) (not (= c_ULTIMATE.start_main_~list~0.base v_ULTIMATE.start_main_~tail~0.base_62)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg .cse3)))) (= (_ bv0 1) (bvadd (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_62) .cse3))))) (exists ((v_arrayElimCell_181 (_ BitVec 1)) (v_arrayElimCell_168 (_ BitVec 1))) (let ((.cse5 (bvneg (bvneg (bvneg v_arrayElimCell_168)))) (.cse4 (bvneg v_arrayElimCell_181))) (and (= (_ bv0 1) (bvadd .cse4 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base))) (= (_ bv0 1) (bvadd .cse5 (_ bv1 1))) (= (_ bv0 1) (bvadd (bvneg .cse5) (bvneg (bvneg .cse4))))))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (not (bvsgt .cse2 (_ bv20 32))))) is different from false [2021-11-07 01:32:39,056 WARN L838 $PredicateComparison]: unable to prove that (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (forall ((ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_77 (_ BitVec 32)) (v_DerPreprocessor_78 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_78 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_78)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_78 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_78) (_ bv4 32) v_DerPreprocessor_77) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (forall ((v_ULTIMATE.start_main_~p~0.base_83 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_83 (_ BitVec 32)) (v_DerPreprocessor_89 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_DerPreprocessor_90 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_83))))) (bvsge (select (select (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_90)))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_83 (store (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_83) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_83) v_DerPreprocessor_89) v_ULTIMATE.start_main_~p~0.offset_83 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (exists ((v_arrayElimCell_180 (_ BitVec 1)) (v_ULTIMATE.start_main_~tail~0.base_62 (_ BitVec 32))) (let ((.cse2 (bvneg v_arrayElimCell_180))) (and (not (= c_ULTIMATE.start_main_~tail~0.base v_ULTIMATE.start_main_~tail~0.base_62)) (not (= c_ULTIMATE.start_main_~list~0.base v_ULTIMATE.start_main_~tail~0.base_62)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg .cse2)))) (= (_ bv0 1) (bvadd (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_62) .cse2))))) (exists ((v_arrayElimCell_181 (_ BitVec 1)) (v_arrayElimCell_168 (_ BitVec 1))) (let ((.cse4 (bvneg (bvneg (bvneg v_arrayElimCell_168)))) (.cse3 (bvneg v_arrayElimCell_181))) (and (= (_ bv0 1) (bvadd .cse3 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base))) (= (_ bv0 1) (bvadd .cse4 (_ bv1 1))) (= (_ bv0 1) (bvadd (bvneg .cse4) (bvneg (bvneg .cse3)))))))) is different from false [2021-11-07 01:32:41,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:41,038 INFO L93 Difference]: Finished difference Result 192 states and 269 transitions. [2021-11-07 01:32:41,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:32:41,040 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 [2021-11-07 01:32:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:41,042 INFO L225 Difference]: With dead ends: 192 [2021-11-07 01:32:41,042 INFO L226 Difference]: Without dead ends: 183 [2021-11-07 01:32:41,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=237, Invalid=488, Unknown=9, NotChecked=456, Total=1190 [2021-11-07 01:32:41,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-07 01:32:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 96. [2021-11-07 01:32:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 95 states have internal predecessors, (135), 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) [2021-11-07 01:32:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2021-11-07 01:32:41,060 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 18 [2021-11-07 01:32:41,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:41,060 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2021-11-07 01:32:41,061 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) [2021-11-07 01:32:41,061 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2021-11-07 01:32:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:32:41,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:41,063 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:41,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:41,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:41,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:32:41,481 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:32:41,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:41,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1147499445, now seen corresponding path program 1 times [2021-11-07 01:32:41,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:41,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730922544] [2021-11-07 01:32:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:41,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:41,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:41,483 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:41,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:32:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:41,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:32:41,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:42,312 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 0 case distinctions, treesize of input 40 treesize of output 20 [2021-11-07 01:32:43,081 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 26 [2021-11-07 01:32:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:32:43,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:45,179 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-07 01:32:45,179 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 33 [2021-11-07 01:32:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:32:45,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:45,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730922544] [2021-11-07 01:32:45,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730922544] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:45,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1537444505] [2021-11-07 01:32:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:45,245 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:45,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:32:45,246 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:32:45,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:32:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:46,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:32:46,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:47,190 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 40 treesize of output 20 [2021-11-07 01:32:48,530 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 26 [2021-11-07 01:32:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:32:48,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:48,969 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-07 01:32:48,969 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 33 [2021-11-07 01:32:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:32:49,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1537444505] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:49,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646710418] [2021-11-07 01:32:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:49,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:32:49,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:32:49,080 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:32:49,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 01:32:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:49,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:32:49,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:50,139 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 40 treesize of output 20 [2021-11-07 01:32:50,847 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 26 [2021-11-07 01:32:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:32:50,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:51,295 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-07 01:32:51,296 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 33 [2021-11-07 01:32:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:32:51,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646710418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:32:51,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:32:51,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11, 9, 10, 9] total 23 [2021-11-07 01:32:51,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803148631] [2021-11-07 01:32:51,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 01:32:51,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:51,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 01:32:51,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:32:51,361 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 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) [2021-11-07 01:33:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:01,627 INFO L93 Difference]: Finished difference Result 195 states and 270 transitions. [2021-11-07 01:33:01,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 01:33:01,635 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 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 [2021-11-07 01:33:01,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:01,637 INFO L225 Difference]: With dead ends: 195 [2021-11-07 01:33:01,637 INFO L226 Difference]: Without dead ends: 178 [2021-11-07 01:33:01,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 01:33:01,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-07 01:33:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 113. [2021-11-07 01:33:01,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4464285714285714) internal successors, (162), 112 states have internal predecessors, (162), 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) [2021-11-07 01:33:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 162 transitions. [2021-11-07 01:33:01,652 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 162 transitions. Word has length 20 [2021-11-07 01:33:01,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:01,653 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 162 transitions. [2021-11-07 01:33:01,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 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) [2021-11-07 01:33:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 162 transitions. [2021-11-07 01:33:01,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:33:01,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:01,655 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:01,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-07 01:33:01,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:02,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:02,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:02,259 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:02,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:02,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1494005967, now seen corresponding path program 2 times [2021-11-07 01:33:02,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:02,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123704634] [2021-11-07 01:33:02,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:33:02,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:02,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:02,261 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:02,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:33:02,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:33:02,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:33:02,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 01:33:02,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:02,914 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 [2021-11-07 01:33:02,922 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 [2021-11-07 01:33:03,022 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:03,023 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:33:03,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:03,032 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-11-07 01:33:03,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:03,220 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-11-07 01:33:03,221 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 [2021-11-07 01:33:03,283 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:33:03,283 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 [2021-11-07 01:33:03,440 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:03,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-11-07 01:33:03,447 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:03,448 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-11-07 01:33:03,574 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-07 01:33:03,574 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 89 treesize of output 81 [2021-11-07 01:33:03,605 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-07 01:33:03,605 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 53 treesize of output 55 [2021-11-07 01:33:03,720 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:03,721 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-07 01:33:03,821 INFO L354 Elim1Store]: treesize reduction 54, result has 31.6 percent of original size [2021-11-07 01:33:03,821 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 [2021-11-07 01:33:03,906 INFO L354 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2021-11-07 01:33:03,906 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 [2021-11-07 01:33:04,088 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 [2021-11-07 01:33:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:33:04,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:04,223 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:04,224 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-07 01:33:04,226 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:04,227 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-07 01:33:06,275 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.base_97 (_ BitVec 32)) (v_DerPreprocessor_100 (_ BitVec 32)) (v_DerPreprocessor_101 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_101)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_97 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_97) (_ bv4 32) v_DerPreprocessor_100) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-11-07 01:33:06,485 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:06,486 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-11-07 01:33:06,491 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:06,492 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-07 01:33:08,804 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~tail~0.offset_82 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_97 (_ BitVec 32)) (v_DerPreprocessor_100 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_59 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_101 (_ BitVec 32)) (v_DerPreprocessor_102 (_ BitVec 32)) (v_DerPreprocessor_103 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_98 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_72 (_ BitVec 32))) (or (bvslt v_ULTIMATE.start_main_~x~0_59 (_ bv10 32)) (bvsgt v_ULTIMATE.start_main_~x~0_59 (_ bv20 32)) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_103)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_72 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_72) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_98) v_DerPreprocessor_102) v_ULTIMATE.start_main_~p~0.offset_98 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_82) v_DerPreprocessor_101))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_97 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_97) (_ bv4 32) v_DerPreprocessor_100) (_ bv0 32) v_ULTIMATE.start_main_~x~0_59))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_72)))))))) is different from false [2021-11-07 01:33:09,398 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:09,399 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-07 01:33:09,403 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:09,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 234 [2021-11-07 01:33:12,233 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_100 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_101 (_ BitVec 32)) (v_DerPreprocessor_102 (_ BitVec 32)) (v_DerPreprocessor_103 (_ BitVec 32)) (v_DerPreprocessor_104 (_ BitVec 32)) (v_DerPreprocessor_105 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_61 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_99 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_98 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_82 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_97 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_59 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_84 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_72 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_73 (_ BitVec 32))) (or (bvslt v_ULTIMATE.start_main_~x~0_59 (_ bv10 32)) (bvsge (select (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_105)))) (store .cse2 v_ULTIMATE.start_main_~tail~0.base_73 (store (store (store (select .cse2 v_ULTIMATE.start_main_~tail~0.base_73) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_99) v_DerPreprocessor_104) v_ULTIMATE.start_main_~p~0.offset_99 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_84) v_DerPreprocessor_103))))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_72 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_72) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_98) v_DerPreprocessor_102) v_ULTIMATE.start_main_~p~0.offset_98 v_ULTIMATE.start_main_~x~0_61) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_82) v_DerPreprocessor_101))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_97 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_97) (_ bv4 32) v_DerPreprocessor_100) (_ bv0 32) v_ULTIMATE.start_main_~x~0_59))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_73 (_ bv1 1)) v_ULTIMATE.start_main_~tail~0.base_72))))))) (bvsgt v_ULTIMATE.start_main_~x~0_59 (_ bv20 32)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_73))))))) is different from false [2021-11-07 01:33:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2021-11-07 01:33:14,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:14,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123704634] [2021-11-07 01:33:14,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123704634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:14,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2009182667] [2021-11-07 01:33:14,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:33:14,005 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:33:14,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:33:14,011 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:33:14,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 01:33:14,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:33:14,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040942276] [2021-11-07 01:33:14,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:33:14,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:33:14,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:33:14,801 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:33:14,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 1 [2021-11-07 01:33:14,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 01:33:15,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:33:15,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:33:15,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 01:33:15,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:15,543 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 [2021-11-07 01:33:15,551 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 [2021-11-07 01:33:15,639 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:15,640 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-11-07 01:33:15,643 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:15,643 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-11-07 01:33:15,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:15,824 INFO L354 Elim1Store]: treesize reduction 118, result has 33.7 percent of original size [2021-11-07 01:33:15,824 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 [2021-11-07 01:33:15,881 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:33:15,882 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 [2021-11-07 01:33:16,023 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:16,024 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-11-07 01:33:16,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:16,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-11-07 01:33:16,167 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-07 01:33:16,168 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 94 treesize of output 86 [2021-11-07 01:33:16,226 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-07 01:33:16,226 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 58 treesize of output 75 [2021-11-07 01:33:16,740 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:16,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-11-07 01:33:16,747 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:16,748 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-07 01:33:16,891 INFO L354 Elim1Store]: treesize reduction 195, result has 11.8 percent of original size [2021-11-07 01:33:16,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 108 [2021-11-07 01:33:16,940 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-07 01:33:16,940 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 80 treesize of output 84 [2021-11-07 01:33:17,056 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 [2021-11-07 01:33:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:33:17,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:17,103 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:17,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:33:17,106 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:17,107 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-07 01:33:19,146 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_112 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_113 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_102 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_102 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_113)))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_102 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_102) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_102) v_DerPreprocessor_112) v_ULTIMATE.start_main_~p~0.offset_102 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_102)))))) is different from false [2021-11-07 01:33:19,341 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:19,342 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-11-07 01:33:19,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:19,345 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-11-07 01:33:21,510 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_103 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_112 (_ BitVec 32)) (v_DerPreprocessor_113 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_102 (_ BitVec 32)) (v_DerPreprocessor_114 (_ BitVec 32)) (v_DerPreprocessor_115 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_66 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_102 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_91 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_79 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_79 (_ bv1 1)) v_ULTIMATE.start_main_~p~0.base_102))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_79)))) (bvsge (select (select (let ((.cse0 (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_115)))) (store .cse1 v_ULTIMATE.start_main_~tail~0.base_79 (store (store (store (select .cse1 v_ULTIMATE.start_main_~tail~0.base_79) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_103) v_DerPreprocessor_114) v_ULTIMATE.start_main_~p~0.offset_103 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_91) v_DerPreprocessor_113))))) (store .cse0 v_ULTIMATE.start_main_~p~0.base_102 (store (store (select .cse0 v_ULTIMATE.start_main_~p~0.base_102) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_102) v_DerPreprocessor_112) v_ULTIMATE.start_main_~p~0.offset_102 v_ULTIMATE.start_main_~x~0_66))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) is different from false [2021-11-07 01:33:21,902 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:21,903 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 182 [2021-11-07 01:33:21,907 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:21,908 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-07 01:33:24,636 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~p~0.offset_104 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_103 (_ BitVec 32)) (v_DerPreprocessor_112 (_ BitVec 32)) (v_DerPreprocessor_113 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_102 (_ BitVec 32)) (v_DerPreprocessor_114 (_ BitVec 32)) (v_DerPreprocessor_115 (_ BitVec 32)) (v_DerPreprocessor_116 (_ BitVec 32)) (v_DerPreprocessor_117 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_66 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_102 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_93 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0_68 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.offset_91 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_79 (_ BitVec 32)) (v_ULTIMATE.start_main_~tail~0.base_80 (_ BitVec 32))) (let ((.cse0 (store |c_#valid| v_ULTIMATE.start_main_~tail~0.base_80 (_ bv1 1)))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse0 v_ULTIMATE.start_main_~tail~0.base_79)))))) (bvsge (select (select (let ((.cse1 (let ((.cse2 (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_117)))) (store .cse3 v_ULTIMATE.start_main_~tail~0.base_80 (store (store (store (select .cse3 v_ULTIMATE.start_main_~tail~0.base_80) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_104) v_DerPreprocessor_116) v_ULTIMATE.start_main_~p~0.offset_104 ULTIMATE.start_main_~x~0) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_93) v_DerPreprocessor_115))))) (store .cse2 v_ULTIMATE.start_main_~tail~0.base_79 (store (store (store (select .cse2 v_ULTIMATE.start_main_~tail~0.base_79) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_103) v_DerPreprocessor_114) v_ULTIMATE.start_main_~p~0.offset_103 v_ULTIMATE.start_main_~x~0_68) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~tail~0.offset_91) v_DerPreprocessor_113))))) (store .cse1 v_ULTIMATE.start_main_~p~0.base_102 (store (store (select .cse1 v_ULTIMATE.start_main_~p~0.base_102) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_102) v_DerPreprocessor_112) v_ULTIMATE.start_main_~p~0.offset_102 v_ULTIMATE.start_main_~x~0_66))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_80)))) (not (= (_ bv0 1) (bvneg (bvneg (select (store .cse0 v_ULTIMATE.start_main_~tail~0.base_79 (_ bv1 1)) v_ULTIMATE.start_main_~p~0.base_102)))))))) is different from false [2021-11-07 01:33:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2021-11-07 01:33:26,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040942276] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:33:26,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:33:26,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8] total 19 [2021-11-07 01:33:26,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129812170] [2021-11-07 01:33:26,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 01:33:26,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:26,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 01:33:26,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=118, Unknown=6, NotChecked=162, Total=342 [2021-11-07 01:33:26,178 INFO L87 Difference]: Start difference. First operand 113 states and 162 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) [2021-11-07 01:33:35,625 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int| c_ULTIMATE.start_main_~p~0.base) (_ bv0 32)))) (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (exists ((v_arrayElimCell_202 (_ BitVec 1)) (v_arrayElimCell_217 (_ BitVec 1))) (let ((.cse0 (bvneg (bvneg (bvneg (bvneg v_arrayElimCell_202))))) (.cse1 (bvneg v_arrayElimCell_217))) (and (= (_ bv0 1) (bvadd (bvneg .cse0) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse0 (bvneg (bvneg .cse1)))) (= (_ bv0 1) (bvadd .cse1 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base)))))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (bvslt .cse2 (_ bv10 32))) (exists ((v_ULTIMATE.start_main_~tail~0.base_76 (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_76))))) (_ bv1 1))) (not (= c_ULTIMATE.start_main_~list~0.base v_ULTIMATE.start_main_~tail~0.base_76)) (not (= c_ULTIMATE.start_main_~tail~0.base v_ULTIMATE.start_main_~tail~0.base_76)))) (forall ((v_ULTIMATE.start_main_~p~0.base_97 (_ BitVec 32)) (v_DerPreprocessor_100 (_ BitVec 32)) (v_DerPreprocessor_101 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_101)))) (store .cse3 v_ULTIMATE.start_main_~p~0.base_97 (store (store (select .cse3 v_ULTIMATE.start_main_~p~0.base_97) (_ bv4 32) v_DerPreprocessor_100) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (= c_ULTIMATE.start_main_~p~0.offset (_ bv0 32)) (not (bvsgt .cse2 (_ bv20 32))) (forall ((v_DerPreprocessor_112 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_113 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_102 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_102 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse4 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_113)))) (store .cse4 v_ULTIMATE.start_main_~p~0.base_102 (store (store (select .cse4 v_ULTIMATE.start_main_~p~0.base_102) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_102) v_DerPreprocessor_112) v_ULTIMATE.start_main_~p~0.offset_102 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_102)))))))) is different from false [2021-11-07 01:33:37,736 WARN L838 $PredicateComparison]: unable to prove that (and (not (= c_ULTIMATE.start_main_~list~0.base c_ULTIMATE.start_main_~tail~0.base)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~tail~0.base))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (exists ((v_arrayElimCell_202 (_ BitVec 1)) (v_arrayElimCell_217 (_ BitVec 1))) (let ((.cse0 (bvneg (bvneg (bvneg (bvneg v_arrayElimCell_202))))) (.cse1 (bvneg v_arrayElimCell_217))) (and (= (_ bv0 1) (bvadd (bvneg .cse0) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse0 (bvneg (bvneg .cse1)))) (= (_ bv0 1) (bvadd .cse1 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base)))))) (= (select (select |c_#memory_int| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (exists ((v_ULTIMATE.start_main_~tail~0.base_76 (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~tail~0.base_76))))) (_ bv1 1))) (not (= c_ULTIMATE.start_main_~list~0.base v_ULTIMATE.start_main_~tail~0.base_76)) (not (= c_ULTIMATE.start_main_~tail~0.base v_ULTIMATE.start_main_~tail~0.base_76)))) (forall ((v_ULTIMATE.start_main_~p~0.base_97 (_ BitVec 32)) (v_DerPreprocessor_100 (_ BitVec 32)) (v_DerPreprocessor_101 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32))) (or (bvslt ULTIMATE.start_main_~x~0 (_ bv10 32)) (bvsgt ULTIMATE.start_main_~x~0 (_ bv20 32)) (bvsge (select (select (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_101)))) (store .cse2 v_ULTIMATE.start_main_~p~0.base_97 (store (store (select .cse2 v_ULTIMATE.start_main_~p~0.base_97) (_ bv4 32) v_DerPreprocessor_100) (_ bv0 32) ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)))) (forall ((v_DerPreprocessor_112 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_113 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_102 (_ BitVec 32)) (ULTIMATE.start_main_~tail~0.offset (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_102 (_ BitVec 32))) (or (bvsge (select (select (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~tail~0.offset) v_DerPreprocessor_113)))) (store .cse3 v_ULTIMATE.start_main_~p~0.base_102 (store (store (select .cse3 v_ULTIMATE.start_main_~p~0.base_102) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_102) v_DerPreprocessor_112) v_ULTIMATE.start_main_~p~0.offset_102 ULTIMATE.start_main_~x~0))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_102))))))) is different from false [2021-11-07 01:33:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:39,730 INFO L93 Difference]: Finished difference Result 236 states and 334 transitions. [2021-11-07 01:33:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 01:33:39,730 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 [2021-11-07 01:33:39,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:39,732 INFO L225 Difference]: With dead ends: 236 [2021-11-07 01:33:39,732 INFO L226 Difference]: Without dead ends: 204 [2021-11-07 01:33:39,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=237, Invalid=488, Unknown=9, NotChecked=456, Total=1190 [2021-11-07 01:33:39,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-07 01:33:39,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 105. [2021-11-07 01:33:39,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.4230769230769231) internal successors, (148), 104 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) [2021-11-07 01:33:39,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 148 transitions. [2021-11-07 01:33:39,748 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 148 transitions. Word has length 20 [2021-11-07 01:33:39,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:39,749 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 148 transitions. [2021-11-07 01:33:39,749 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) [2021-11-07 01:33:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 148 transitions. [2021-11-07 01:33:39,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 01:33:39,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:39,751 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:39,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:39,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:40,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:33:40,170 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:40,170 INFO L85 PathProgramCache]: Analyzing trace with hash 232192162, now seen corresponding path program 2 times [2021-11-07 01:33:40,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:40,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237280710] [2021-11-07 01:33:40,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:33:40,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:40,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:40,173 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:40,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:33:40,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:33:40,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:33:40,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 01:33:40,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:40,972 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 [2021-11-07 01:33:41,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:41,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:41,094 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-07 01:33:41,095 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 19 [2021-11-07 01:33:41,138 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:33:41,139 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 [2021-11-07 01:33:41,165 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 16 [2021-11-07 01:33:41,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:41,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 19 [2021-11-07 01:33:42,547 INFO L354 Elim1Store]: treesize reduction 307, result has 10.0 percent of original size [2021-11-07 01:33:42,547 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 [2021-11-07 01:33:42,852 INFO L354 Elim1Store]: treesize reduction 323, result has 9.0 percent of original size [2021-11-07 01:33:42,852 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 [2021-11-07 01:33:42,872 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:42,874 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 343 [2021-11-07 01:33:42,880 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:42,881 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 350 [2021-11-07 01:33:43,005 INFO L354 Elim1Store]: treesize reduction 955, result has 8.3 percent of original size [2021-11-07 01:33:43,006 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 350 treesize of output 302 [2021-11-07 01:33:43,044 INFO L354 Elim1Store]: treesize reduction 22, result has 69.9 percent of original size [2021-11-07 01:33:43,044 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 206 treesize of output 226 [2021-11-07 01:33:43,047 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-07 01:33:43,859 INFO L354 Elim1Store]: treesize reduction 71, result has 17.4 percent of original size [2021-11-07 01:33:43,859 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 201 treesize of output 184 [2021-11-07 01:33:43,952 INFO L354 Elim1Store]: treesize reduction 122, result has 14.7 percent of original size [2021-11-07 01:33:43,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 184 treesize of output 125 [2021-11-07 01:33:44,017 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-11-07 01:33:44,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 169 treesize of output 130 [2021-11-07 01:33:44,158 INFO L354 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2021-11-07 01:33:44,158 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 168 treesize of output 97 [2021-11-07 01:33:44,167 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-07 01:33:44,168 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 48 [2021-11-07 01:33:44,249 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 [2021-11-07 01:33:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:44,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:44,406 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:44,407 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-07 01:33:44,409 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:44,411 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-07 01:33:44,668 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:44,670 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-11-07 01:33:44,674 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:44,675 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 228 [2021-11-07 01:33:44,682 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:44,683 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 220 [2021-11-07 01:33:44,687 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:44,687 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 212 [2021-11-07 01:33:47,333 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_121 (_ BitVec 32)) (v_DerPreprocessor_122 (_ BitVec 32)) (v_DerPreprocessor_123 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_124 (_ BitVec 32)) (v_DerPreprocessor_125 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_109 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_109 (_ BitVec 32)) (v_DerPreprocessor_120 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_109)))) (bvsge (let ((.cse3 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_109)) (.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset)) (.cse6 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) .cse4 v_DerPreprocessor_123)))) (store .cse2 v_ULTIMATE.start_main_~p~0.base_109 (store (store (select .cse2 v_ULTIMATE.start_main_~p~0.base_109) .cse3 v_DerPreprocessor_122) v_ULTIMATE.start_main_~p~0.offset_109 ULTIMATE.start_main_~x~0))))) (store .cse0 c_ULTIMATE.start_main_~list~0.base (let ((.cse1 (select .cse0 c_ULTIMATE.start_main_~list~0.base))) (store .cse1 c_ULTIMATE.start_main_~list~0.offset (bvadd (select .cse1 c_ULTIMATE.start_main_~list~0.offset) (_ bv1 32)))))) (select (store (select (let ((.cse5 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base) .cse4 v_ULTIMATE.start_main_~p~0.base_109)))) (store .cse5 v_ULTIMATE.start_main_~p~0.base_109 (store (store (select .cse5 v_ULTIMATE.start_main_~p~0.base_109) .cse3 (_ bv0 32)) v_ULTIMATE.start_main_~p~0.offset_109 v_DerPreprocessor_124))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset v_DerPreprocessor_120) .cse6)) (select (store (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base) .cse4 v_ULTIMATE.start_main_~p~0.offset_109)))) (store .cse7 v_ULTIMATE.start_main_~p~0.base_109 (store (store (select .cse7 v_ULTIMATE.start_main_~p~0.base_109) .cse3 (_ bv0 32)) v_ULTIMATE.start_main_~p~0.offset_109 v_DerPreprocessor_125))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset v_DerPreprocessor_121) .cse6))) (_ bv10 32)))) is different from false [2021-11-07 01:33:49,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:49,084 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 9061376 treesize of output 8954967 [2021-11-07 01:34:18,794 WARN L207 SmtUtils]: Spent 29.71 s on a formula simplification that was a NOOP. DAG size: 1092 [2021-11-07 01:34:48,387 WARN L207 SmtUtils]: Spent 29.48 s on a formula simplification that was a NOOP. DAG size: 1096 [2021-11-07 01:34:48,388 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:35:17,906 WARN L207 SmtUtils]: Spent 29.52 s on a formula simplification that was a NOOP. DAG size: 1060 [2021-11-07 01:35:47,384 WARN L207 SmtUtils]: Spent 29.47 s on a formula simplification that was a NOOP. DAG size: 1087 [2021-11-07 01:35:47,387 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10658812 [2021-11-07 01:36:17,267 WARN L207 SmtUtils]: Spent 29.80 s on a formula simplification that was a NOOP. DAG size: 1087 [2021-11-07 01:36:21,812 INFO L354 Elim1Store]: treesize reduction 366, result has 19.0 percent of original size [2021-11-07 01:36:21,814 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 5 case distinctions, treesize of input 10658812 treesize of output 8004770 [2021-11-07 01:36:51,670 WARN L207 SmtUtils]: Spent 29.85 s on a formula simplification that was a NOOP. DAG size: 1110 [2021-11-07 01:37:21,966 WARN L207 SmtUtils]: Spent 30.29 s on a formula simplification that was a NOOP. DAG size: 1099 [2021-11-07 01:37:23,551 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-11-07 01:37:23,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 9883002 treesize of output 8878380 [2021-11-07 01:37:53,691 WARN L207 SmtUtils]: Spent 30.14 s on a formula simplification that was a NOOP. DAG size: 1119 [2021-11-07 01:38:24,779 WARN L207 SmtUtils]: Spent 31.08 s on a formula simplification that was a NOOP. DAG size: 1114 [2021-11-07 01:38:55,202 WARN L207 SmtUtils]: Spent 30.29 s on a formula simplification that was a NOOP. DAG size: 1118 [2021-11-07 01:38:55,203 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:39:25,714 WARN L207 SmtUtils]: Spent 30.51 s on a formula simplification that was a NOOP. DAG size: 1052 [2021-11-07 01:39:55,426 WARN L207 SmtUtils]: Spent 29.71 s on a formula simplification that was a NOOP. DAG size: 1109 [2021-11-07 01:39:55,427 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10582223 [2021-11-07 01:40:22,113 WARN L207 SmtUtils]: Spent 26.62 s on a formula simplification that was a NOOP. DAG size: 1109 [2021-11-07 01:40:25,813 INFO L354 Elim1Store]: treesize reduction 417, result has 16.6 percent of original size [2021-11-07 01:40:25,815 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 5 case distinctions, treesize of input 10582223 treesize of output 7797110 [2021-11-07 01:40:51,521 WARN L207 SmtUtils]: Spent 25.70 s on a formula simplification that was a NOOP. DAG size: 1116 [2021-11-07 01:41:17,366 WARN L207 SmtUtils]: Spent 25.84 s on a formula simplification that was a NOOP. DAG size: 1105 [2021-11-07 01:41:17,680 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-11-07 01:41:17,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 9413208 treesize of output 8539650 [2021-11-07 01:41:43,370 WARN L207 SmtUtils]: Spent 25.69 s on a formula simplification that was a NOOP. DAG size: 1119 [2021-11-07 01:41:43,371 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-07 01:41:44,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:44,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237280710] [2021-11-07 01:41:44,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-07 01:41:44,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1749447183] [2021-11-07 01:41:44,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:41:44,331 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:44,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:41:44,332 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:41:44,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:41:45,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:41:45,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:41:45,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 01:41:45,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:45,428 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 [2021-11-07 01:41:45,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:45,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:45,525 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:41:45,526 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 23 [2021-11-07 01:41:45,570 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:41:45,571 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 [2021-11-07 01:41:45,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:45,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 19 [2021-11-07 01:41:45,616 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 16 [2021-11-07 01:41:45,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:46,496 INFO L354 Elim1Store]: treesize reduction 202, result has 11.0 percent of original size [2021-11-07 01:41:46,497 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 4 case distinctions, treesize of input 368 treesize of output 238 [2021-11-07 01:41:46,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:46,665 INFO L354 Elim1Store]: treesize reduction 194, result has 10.6 percent of original size [2021-11-07 01:41:46,666 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 460 treesize of output 314 [2021-11-07 01:41:46,671 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:41:46,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 215 [2021-11-07 01:41:46,676 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:41:46,677 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 222 [2021-11-07 01:41:46,724 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-11-07 01:41:46,724 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 2 case distinctions, treesize of input 222 treesize of output 188 [2021-11-07 01:41:46,761 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-11-07 01:41:46,761 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 148 treesize of output 160 [2021-11-07 01:41:46,768 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-07 01:41:47,608 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-07 01:41:47,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 142 [2021-11-07 01:41:47,635 INFO L354 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2021-11-07 01:41:47,636 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 133 treesize of output 120 [2021-11-07 01:41:47,643 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-07 01:41:47,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 76 [2021-11-07 01:41:47,737 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-07 01:41:47,738 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 69 [2021-11-07 01:41:47,744 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-07 01:41:47,744 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 57 treesize of output 41 [2021-11-07 01:41:47,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-11-07 01:41:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:47,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:48,082 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:41:48,083 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-11-07 01:41:48,085 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:41:48,086 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-11-07 01:41:48,733 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:41:48,735 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 203 [2021-11-07 01:41:48,737 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:41:48,738 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 243 [2021-11-07 01:41:48,741 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:41:48,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 266 [2021-11-07 01:41:48,745 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:41:48,746 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 289 [2021-11-07 01:41:53,495 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_132 (_ BitVec 32)) (v_DerPreprocessor_133 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_134 (_ BitVec 32)) (v_DerPreprocessor_135 (_ BitVec 32)) (v_DerPreprocessor_130 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_114 (_ BitVec 32)) (v_DerPreprocessor_131 (_ BitVec 32))) (let ((.cse5 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset)) (.cse7 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))) (let ((.cse0 (select (store (select (let ((.cse8 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base) .cse5 v_ULTIMATE.start_main_~p~0.base_114)))) (store .cse8 v_ULTIMATE.start_main_~p~0.base_114 (store (store (select .cse8 v_ULTIMATE.start_main_~p~0.base_114) (_ bv4 32) (_ bv0 32)) (_ bv0 32) v_DerPreprocessor_134))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset v_DerPreprocessor_130) .cse7)) (.cse1 (select (store (select (let ((.cse6 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base) .cse5 (_ bv0 32))))) (store .cse6 v_ULTIMATE.start_main_~p~0.base_114 (store (store (select .cse6 v_ULTIMATE.start_main_~p~0.base_114) (_ bv4 32) (_ bv0 32)) (_ bv0 32) v_DerPreprocessor_135))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset v_DerPreprocessor_131) .cse7))) (or (and (= .cse0 (_ bv0 32)) (= .cse1 (_ bv0 32))) (bvsge (select (select (let ((.cse2 (let ((.cse4 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) .cse5 v_DerPreprocessor_133)))) (store .cse4 v_ULTIMATE.start_main_~p~0.base_114 (store (store (select .cse4 v_ULTIMATE.start_main_~p~0.base_114) (_ bv4 32) v_DerPreprocessor_132) (_ bv0 32) ULTIMATE.start_main_~x~0))))) (store .cse2 c_ULTIMATE.start_main_~list~0.base (let ((.cse3 (select .cse2 c_ULTIMATE.start_main_~list~0.base))) (store .cse3 c_ULTIMATE.start_main_~list~0.offset (bvadd (_ bv1 32) (select .cse3 c_ULTIMATE.start_main_~list~0.offset)))))) .cse0) .cse1) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_114)))))))) is different from false [2021-11-07 01:41:59,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:41:59,504 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 351122 treesize of output 346725 [2021-11-07 01:42:01,215 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:02,872 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 453182 [2021-11-07 01:42:05,824 INFO L354 Elim1Store]: treesize reduction 243, result has 25.7 percent of original size [2021-11-07 01:42:05,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 453182 treesize of output 291473 [2021-11-07 01:42:08,748 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-11-07 01:42:08,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 362217 treesize of output 322777 [2021-11-07 01:42:11,336 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:13,014 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 429232 [2021-11-07 01:42:14,237 INFO L354 Elim1Store]: treesize reduction 289, result has 19.9 percent of original size [2021-11-07 01:42:14,238 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 5 case distinctions, treesize of input 429232 treesize of output 259319 [2021-11-07 01:42:16,190 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-11-07 01:42:16,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 259301 treesize of output 255241 [2021-11-07 01:42:17,058 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-07 01:42:17,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-07 01:42:17,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204634150] [2021-11-07 01:42:17,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:42:17,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:42:17,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:42:17,333 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:42:17,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 01:42:18,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:42:18,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:42:18,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 01:42:18,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:18,120 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 [2021-11-07 01:42:18,186 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 [2021-11-07 01:42:18,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:18,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:18,230 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:42:18,231 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 23 [2021-11-07 01:42:18,279 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 01:42:18,279 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 [2021-11-07 01:42:18,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:18,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 19 [2021-11-07 01:42:18,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:19,284 INFO L354 Elim1Store]: treesize reduction 209, result has 11.1 percent of original size [2021-11-07 01:42:19,285 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 293 treesize of output 179 [2021-11-07 01:42:19,291 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:19,292 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 285 [2021-11-07 01:42:19,295 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:19,296 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 292 [2021-11-07 01:42:19,455 INFO L354 Elim1Store]: treesize reduction 332, result has 12.2 percent of original size [2021-11-07 01:42:19,455 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 292 treesize of output 258 [2021-11-07 01:42:19,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:19,557 INFO L354 Elim1Store]: treesize reduction 429, result has 8.9 percent of original size [2021-11-07 01:42:19,557 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 5 case distinctions, treesize of input 216 treesize of output 151 [2021-11-07 01:42:19,594 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-11-07 01:42:19,594 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 152 treesize of output 164 [2021-11-07 01:42:19,596 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-07 01:42:20,286 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-11-07 01:42:20,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 201 treesize of output 162 [2021-11-07 01:42:20,336 INFO L354 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2021-11-07 01:42:20,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 142 treesize of output 101 [2021-11-07 01:42:20,368 INFO L354 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2021-11-07 01:42:20,368 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 127 treesize of output 114 [2021-11-07 01:42:20,514 INFO L354 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2021-11-07 01:42:20,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 97 [2021-11-07 01:42:20,526 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-07 01:42:20,527 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 48 [2021-11-07 01:42:20,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-07 01:42:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:20,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:20,642 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:20,643 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-11-07 01:42:20,648 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:20,649 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-11-07 01:42:20,848 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:20,849 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-11-07 01:42:20,853 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:20,854 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 228 [2021-11-07 01:42:20,858 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:20,859 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 220 [2021-11-07 01:42:20,863 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:20,864 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 212 [2021-11-07 01:42:23,464 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_143 (_ BitVec 32)) (v_DerPreprocessor_121 (_ BitVec 32)) (v_DerPreprocessor_144 (_ BitVec 32)) (ULTIMATE.start_main_~x~0 (_ BitVec 32)) (v_DerPreprocessor_145 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.base_119 (_ BitVec 32)) (v_ULTIMATE.start_main_~p~0.offset_119 (_ BitVec 32)) (v_DerPreprocessor_142 (_ BitVec 32)) (v_DerPreprocessor_120 (_ BitVec 32))) (or (bvsge (let ((.cse3 (bvadd (_ bv4 32) v_ULTIMATE.start_main_~p~0.offset_119)) (.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset)) (.cse6 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_int| c_ULTIMATE.start_main_~tail~0.base) .cse4 v_DerPreprocessor_143)))) (store .cse2 v_ULTIMATE.start_main_~p~0.base_119 (store (store (select .cse2 v_ULTIMATE.start_main_~p~0.base_119) .cse3 v_DerPreprocessor_142) v_ULTIMATE.start_main_~p~0.offset_119 ULTIMATE.start_main_~x~0))))) (store .cse0 c_ULTIMATE.start_main_~list~0.base (let ((.cse1 (select .cse0 c_ULTIMATE.start_main_~list~0.base))) (store .cse1 c_ULTIMATE.start_main_~list~0.offset (bvadd (select .cse1 c_ULTIMATE.start_main_~list~0.offset) (_ bv1 32)))))) (select (store (select (let ((.cse5 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base) .cse4 v_ULTIMATE.start_main_~p~0.base_119)))) (store .cse5 v_ULTIMATE.start_main_~p~0.base_119 (store (store (select .cse5 v_ULTIMATE.start_main_~p~0.base_119) .cse3 (_ bv0 32)) v_ULTIMATE.start_main_~p~0.offset_119 v_DerPreprocessor_144))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset v_DerPreprocessor_120) .cse6)) (select (store (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base) .cse4 v_ULTIMATE.start_main_~p~0.offset_119)))) (store .cse7 v_ULTIMATE.start_main_~p~0.base_119 (store (store (select .cse7 v_ULTIMATE.start_main_~p~0.base_119) .cse3 (_ bv0 32)) v_ULTIMATE.start_main_~p~0.offset_119 v_DerPreprocessor_145))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset v_DerPreprocessor_121) .cse6))) (_ bv10 32)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~p~0.base_119)))))) is different from false [2021-11-07 01:42:24,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:24,967 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 70764 treesize of output 70019 [2021-11-07 01:42:25,386 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:25,784 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83240 [2021-11-07 01:42:30,144 INFO L354 Elim1Store]: treesize reduction 366, result has 19.0 percent of original size [2021-11-07 01:42:30,144 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 5 case distinctions, treesize of input 83240 treesize of output 62670 [2021-11-07 01:42:31,659 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-11-07 01:42:31,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 77598 treesize of output 69652 [2021-11-07 01:42:32,296 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:42:32,700 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82871 [2021-11-07 01:42:36,372 INFO L354 Elim1Store]: treesize reduction 417, result has 16.6 percent of original size [2021-11-07 01:42:36,372 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 5 case distinctions, treesize of input 82871 treesize of output 61278 [2021-11-07 01:42:37,002 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-11-07 01:42:37,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74168 treesize of output 67238 [2021-11-07 01:42:37,221 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-07 01:42:37,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-07 01:42:37,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:37,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 01:42:37,315 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-07 01:42:37,315 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 01:42:37,321 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:42:37,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:37,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:37,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-07 01:42:37,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:37,931 INFO L731 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1] [2021-11-07 01:42:37,932 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:42:37,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:42:37 BoogieIcfgContainer [2021-11-07 01:42:37,946 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:42:37,946 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:42:37,946 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:42:37,947 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:42:37,947 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:03" (3/4) ... [2021-11-07 01:42:37,964 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 01:42:37,964 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:42:37,965 INFO L168 Benchmark]: Toolchain (without parser) took 756087.62 ms. Allocated memory was 60.8 MB in the beginning and 725.6 MB in the end (delta: 664.8 MB). Free memory was 45.1 MB in the beginning and 529.7 MB in the end (delta: -484.5 MB). Peak memory consumption was 178.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:37,965 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 50.3 MB. Free memory was 31.6 MB in the beginning and 31.5 MB in the end (delta: 32.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:42:37,965 INFO L168 Benchmark]: CACSL2BoogieTranslator took 578.74 ms. Allocated memory is still 60.8 MB. Free memory was 44.9 MB in the beginning and 36.6 MB in the end (delta: 8.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:37,965 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.20 ms. Allocated memory is still 60.8 MB. Free memory was 36.6 MB in the beginning and 34.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:37,965 INFO L168 Benchmark]: Boogie Preprocessor took 46.85 ms. Allocated memory is still 60.8 MB. Free memory was 34.7 MB in the beginning and 33.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:37,965 INFO L168 Benchmark]: RCFGBuilder took 585.01 ms. Allocated memory is still 60.8 MB. Free memory was 33.1 MB in the beginning and 34.0 MB in the end (delta: -966.2 kB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:37,966 INFO L168 Benchmark]: TraceAbstraction took 754802.74 ms. Allocated memory was 60.8 MB in the beginning and 725.6 MB in the end (delta: 664.8 MB). Free memory was 33.8 MB in the beginning and 529.7 MB in the end (delta: -495.9 MB). Peak memory consumption was 467.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:37,966 INFO L168 Benchmark]: Witness Printer took 18.05 ms. Allocated memory is still 725.6 MB. Free memory is still 529.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:42:37,967 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 50.3 MB. Free memory was 31.6 MB in the beginning and 31.5 MB in the end (delta: 32.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 578.74 ms. Allocated memory is still 60.8 MB. Free memory was 44.9 MB in the beginning and 36.6 MB in the end (delta: 8.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.20 ms. Allocated memory is still 60.8 MB. Free memory was 36.6 MB in the beginning and 34.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.85 ms. Allocated memory is still 60.8 MB. Free memory was 34.7 MB in the beginning and 33.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 585.01 ms. Allocated memory is still 60.8 MB. Free memory was 33.1 MB in the beginning and 34.0 MB in the end (delta: -966.2 kB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 754802.74 ms. Allocated memory was 60.8 MB in the beginning and 725.6 MB in the end (delta: 664.8 MB). Free memory was 33.8 MB in the beginning and 529.7 MB in the end (delta: -495.9 MB). Peak memory consumption was 467.9 MB. Max. memory is 16.1 GB. * Witness Printer took 18.05 ms. Allocated memory is still 725.6 MB. Free memory is still 529.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 589]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L573] Node *p, *list = malloc(sizeof(*list)); [L573] Node *p, *list = malloc(sizeof(*list)); [L574] Node *tail = list; [L575] list->next = ((void *)0) [L576] list->val = 10 [L577] COND TRUE __VERIFIER_nondet_int() [L578] int x = __VERIFIER_nondet_int(); [L579] COND FALSE !(x < 10 || x > 20) [L580] p = malloc(sizeof(*p)) [L581] tail->next = p [L582] p->next = ((void *)0) [L583] p->val = x [L584] tail = p [L577] COND TRUE __VERIFIER_nondet_int() [L578] int x = __VERIFIER_nondet_int(); [L579] COND FALSE !(x < 10 || x > 20) [L580] p = malloc(sizeof(*p)) [L581] tail->next = p [L582] p->next = ((void *)0) [L583] p->val = x [L584] tail = p [L577] COND FALSE !(__VERIFIER_nondet_int()) [L586] COND TRUE 1 [L587] p = list [L587] COND TRUE p!= ((void *)0) [L588] EXPR p->val [L588] EXPR p->val <= 20 && p->val >= 10 [L588] EXPR p->val [L588] EXPR p->val <= 20 && p->val >= 10 [L588] COND FALSE !(!(p->val <= 20 && p->val >= 10)) [L590] EXPR p->val [L590] COND TRUE p->val < 20 [L590] EXPR p->val [L590] p->val++ [L587] EXPR p->next [L587] p = p->next [L587] COND TRUE p!= ((void *)0) [L588] EXPR p->val [L588] EXPR p->val <= 20 && p->val >= 10 [L588] EXPR p->val [L588] EXPR p->val <= 20 && p->val >= 10 [L588] COND TRUE !(p->val <= 20 && p->val >= 10) [L589] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 754.7s, OverallIterations: 12, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 53.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 212 SDtfs, 654 SDslu, 1120 SDs, 0 SdLazy, 1658 SolverSat, 365 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 831 GetRequests, 596 SyntacticMatches, 14 SemanticMatches, 221 ConstructedPredicates, 33 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 95.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=10, InterpolantAutomatonStates: 160, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 451 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 629.8s InterpolantComputationTime, 407 NumberOfCodeBlocks, 407 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 744 ConstructedInterpolants, 164 QuantifiedInterpolants, 20580 SizeOfPredicates, 315 NumberOfNonLiveVariables, 1828 ConjunctsInSsa, 432 ConjunctsInUnsatCore, 49 InterpolantComputations, 6 PerfectInterpolantSequences, 70/378 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 01:42:38,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b923a1-7d78-4d5a-b52d-027e105f951e/bin/utaipan-UUZaoUuFF8/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 Writing output log to file Ultimate.log Result: UNKNOWN